CN110071627A - Drive control circuit and air conditioner - Google Patents
Drive control circuit and air conditioner Download PDFInfo
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- CN110071627A CN110071627A CN201910447810.4A CN201910447810A CN110071627A CN 110071627 A CN110071627 A CN 110071627A CN 201910447810 A CN201910447810 A CN 201910447810A CN 110071627 A CN110071627 A CN 110071627A
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- 239000003990 capacitor Substances 0.000 claims abstract description 153
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000006096 absorbing agent Substances 0.000 claims description 102
- 238000010521 absorption reaction Methods 0.000 claims description 24
- 230000005611 electricity Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000010409 thin film Substances 0.000 abstract description 28
- 206010037660 Pyrexia Diseases 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 31
- 238000013016 damping Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001962 electrophoresis Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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Abstract
The present invention provides a kind of drive control circuit and air conditioners, wherein drive control circuit includes: inverter bridge, is used for output drive signal, and inverter bridge is connected between high voltage bus and low-voltage bus bar；Control circuit further include: reactor, for absorbing the surging signal generated during drive control circuit driving load running, reactor is accessed between power grid and load；Bus capacitor, for filtering out the surging signal in two buss lines, bus capacitor is accessed in the two buss lines of inverter bridge input side.Apply technical solution provided by the invention, by using the electrolytic capacitor that the more cheap thin-film capacitor alternative cost of cost is high, improve the service life of drive control circuit, reduce due to the case where bus capacitor fever causes control efficiency to reduce appearance, improves the reliability and working efficiency of drive control circuit.
Description
This application claims on 01 16th, 2019 submission Patent Office of the People's Republic of China, application No. is 201910041294.5, invention
This is hereby incorporated by reference in the priority of the Chinese patent application of entitled " drive control circuit and air conditioner ", entire contents
In application.
Technical field
The present invention relates to compressor control technical fields, in particular to a kind of drive control circuit and a kind of air-conditioning
Device.
Background technique
In general, variable frequency air-conditioner controller largely uses AC-DC-AC (AC-DC-exchange) topological structure, such as Fig. 1
It is shown, wherein mainly including AC power supply module 10 ', power filtering module 12 ', rectification module 14 ', filter module 16 ', inversion
Module 18 ' and load 20 '.
Generally, due to which filter module needs to filter the power frequency component after smooth stream, so often using the electricity of larger capacity
Capacitor is solved as main filter element, as shown in Figures 2 and 3, wherein C2 to C7 is filtering electrolytic capacitor.
However, the use of electrolytic capacitor will cause following problems:
One, the THD (Total Harmonic Distortion, harmonic distortion) of input AC electric current increases.
Two, the service life of electrolytic capacitor is shorter, will affect the ultimate life of controller using electrolytic capacitor.
Three, the fever of electrolytic capacitor is larger, can reduce controller efficiency, increases controller heat management difficulty.
Four, the extensive application of electrolytic capacitor also results on PCB (Printed Circuit Board, printed circuit board)
Cause stress distribution uneven, and increases controller overall weight.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, the first aspect of the present invention proposes a kind of drive control circuit.
The second aspect of the present invention proposes a kind of air conditioner.
In view of this, the first aspect of the present invention provides a kind of drive control circuit, drive control circuit includes: inversion
Bridge, is used for output drive signal, and inverter bridge accesses between high voltage bus and low-voltage bus bar；Drive control circuit further include: electricity
Anti- device, for absorbing the surging signal generated during drive control circuit driving load running, reactor access in power grid and
Between load；Bus capacitor, for filtering out the surging signal in two buss lines, bus capacitor is accessed in the mother of inverter bridge input side
In line route.
In the technical scheme, reactor is provided in drive control circuit, reactor is for absorbing drive control circuit
The surging signal generated during load running is driven, to improve the Surge handling capability of drive control circuit；Wherein, reactor with
The resonance frequency of bus capacitor is fixed asWherein L is the inductance value of reactor, and C is the capacitance of bus capacitor, can be effective
It prevents from leading to the unfixed situation of resonance frequency due to distributed inductance capacitance parameter.Meanwhile selecting the lower bus capacitor of capacitance
Instead of traditional electrolytic capacitor, specific to select thin-film capacitor as the bus capacitor on bus, thin-film capacitor is parallel to inverter bridge
Input side, be connected between the high voltage bus and low-voltage bus bar, for filtering out the surging signal on bus.Apply this hair
The technical solution of bright offer, by using the electrolytic capacitor that the more cheap thin-film capacitor alternative cost of cost is high, effectively
Reduce production cost；The service life of thin-film capacitor up to 6250 hours, much larger than 2000 hours of general electrolytic capacitor, therefore
The service life of drive control circuit can be effectively improved.Meanwhile the ESR (equivalent series resistance) of thin-film capacitor is smaller, in identical wave
Under the influence of line electric current, the calorific value of thin-film capacitor is much smaller than electrolytic capacitor, therefore can also effectively avoid due to bus capacitor
The problem of fever causes control efficiency to reduce appearance, improves the reliability and working efficiency of drive control circuit.
Optionally, drive control circuit further include: current-limiting circuit, the charging electricity of bus capacitor when being powered on for the first time for limiting
Stream, current-limiting circuit are connected on high voltage bus.
Since the capacitance of the bus capacitor of selection is lower, when there are surge voltage, due to the thin-film electro of low capacity
Appearance can not absorb excessive energy, and at this time when busbar voltage is higher than surge absoption capacitance terminal voltage, current-limiting circuit comes into force and limits
The charging current of bus capacitor when system powers on, to prevent bus capacitor from being punctured by overcurrent.
Optionally, current-limiting circuit includes: thermo-sensitive resistor, the charging current of bus capacitor when powering on for the first time for limiting, temperature
Quick resistance is connected on high voltage bus；Relay carries out current limliting for controlling the first resistance element of access or is shorted the first resistance
For property element to stop current limliting, relay is connected in parallel on the both ends of thermo-sensitive resistor.
When occurring surging signal on high voltage bus, thermo-sensitive resistor will limit the charging electricity of bus capacitor when powering on for the first time
Stream, and then ensures that bus capacitor is not breakdown, while the resistance value of thermo-sensitive resistor changes with temperature linearity, and then realizes to charging
The rate of climb of electric current is limited.In thermo-sensitive resistor both ends parallel connection relay, the temperature with characteristic of switch is then formed
Quick resistance, when drive control circuit powers on for the first time, relay is in an off state, and the first thermo-sensitive resistor and bus capacitor are inhaled
Receive the surging signal from Alternating Current Power Supply side, in the case that the electric current after powering on for the first time on high voltage bus is not very big, the
One relay closure, and then the first thermo-sensitive resistor is reduced to the metering function of high voltage bus.
Drive control circuit according to the abovementioned embodiments of the present invention can also have following technical characteristic:
In any of the above-described technical solution, further, drive control circuit further include: the first absorbing circuit, for inhaling
The surging signal in two buss lines is received, the first absorbing circuit accesses between bus capacitor and inverter bridge.
In the technical scheme, the case where thin-film capacitor being selected for bus capacitor, when in circuit there are when surge voltage,
Since thin-film capacitor can not absorb excessive surge energy, accessed by the first absorbing circuit of setting in bus capacitor and inverter bridge
Between, with the surging signal on auxiliary bus bar capacitive absorption inverter bridge side bus route, to prevent bus capacitor by surging signal
Breakdown.
In any of the above-described technical solution, further, the first absorbing circuit includes: resistive absorber element, for absorbing
Surging signal, resistive absorber element are in parallel with the bus capacitor；Switch element absorbs surge for regulating and controlling resistive absorber element
The process of signal, switch element are connected in series with resistive absorber element, and when switching elements conductive, resistive absorber element absorbs surge letter
Number, when switch element ends, resistive absorber element stops absorbing surging signal.
In the technical scheme, the first absorbing circuit includes resistive absorber element, and resistive absorber element is for absorbing bus
Surging signal of the capacitor close to inverter bridge side.Specifically, switching elements conductive, resistive absorber element access drive control circuit
And surging signal is absorbed, specifically, resistive absorber element converts thermal energy for the electric energy of surging signal and discharges, to consume wave
Signal is gushed, bus capacitor is by surging signal punch through damage caused by avoiding because of the replacement lesser thin-film capacitor of capacitance.When on bus
Surging signal reduce or disappear after, switch element cut-off, resistive absorber element dialysis from drive control circuit, to avoid right
Normal electric signal in control circuit is absorbed to have an impact.
In any of the above-described technical solution, further, resistive absorber element includes: first resistor, for absorbing surge
Signal, first resistor and switch element are connected in series, and the resistance value of first resistor is corresponding with preset busbar voltage protection threshold value；
And/or the resistance value of first resistor is corresponding with the overcurrent protection threshold value of preset switch element.
In the technical scheme, resistive absorber element includes first resistor, and first resistor and switch element are connected in series, when
When switching elements conductive, the first absorbing circuit conducting, surging signal is absorbed by first resistor；When switch element cut-off, first
Absorbing circuit disconnects, and first resistor does not reabsorb the electric signal in drive control circuit.Specifically, the resistance value and function of first resistor
Rate protects threshold value and the over current value of preset switch element and the power demand of absorption corresponding with preset busbar voltage, with
Ensure resistive absorber element to the assimilation effect of surge.Wherein, in voltage protection threshold value and current protection threshold value and driving circuit
The factory-designed voltage value that can bear of each component is related to current value.
In any of the above-described technical solution, further, resistive absorber element includes: the first single-phase breakover element, with
One resistance is in parallel, and the conducting direction of the first single-phase breakover element is opposite with the current direction for flowing through first resistor.
In the technical scheme, in the both ends of first resistor the first one-way conduction element in parallel, specifically, first is unidirectionally led
Logical element is diode, is used to form the self induction voltage Releasing loop of first resistor, prevent from generating in first resistor from electrification
Pressure has an impact the reliability of switch element.
Optionally, first resistor is inductive resistance.
Optionally, the conducting direction of the first single-phase breakover element is opposite with the current direction in first resistor.
In any of the above-described technical solution, further, drive control circuit further include: the second absorbing circuit, for inhaling
The surging signal on high voltage bus and low-voltage bus bar is received, the second absorbing circuit includes: capacitive absorber element, for absorbing surge letter
Number, capacitive absorber element is in parallel with bus capacitor；Second one-way conduction element, for regulating and controlling capacitive absorber element to surging signal
Absorption process, the second one-way conduction element is connected in series with capacitive absorber element.
In the technical scheme, the second absorbing circuit includes the capacitive absorber element in parallel with bus capacitor, passes through capacitive
Absorber element absorbs the surging signal on bus, further includes and the concatenated second one-way conduction element of capacitive absorber element.Specifically
Ground, capacitive absorber element have a capacitive, capacitive absorber element for limiting capacitive absorber element to the absorption process of surging signal,
So that capacitive absorber element can only absorb the surging signal on high voltage bus, that is, pass through the setting of one-way conduction element, by bus
Capacitor is distinguished with capacitive absorber element, is avoided and is used using capacitive absorber element as bus capacitor, and capacitive suction is reduced
The frequency of usage for receiving element, improves the service life of the second absorbing circuit.
In any of the above-described technical solution, further, capacitive absorber element includes at least one capacitor or multiple series connection
And/or capacitor in parallel, the second absorbing circuit further include: second resistance, for absorbing the surging signal in the first capacitive element,
Second resistance is in parallel with capacitor.
In the technical scheme, capacitive absorber element includes one or more capacitors for absorbing surging signal, multiple
Capacitor is serially connected and/or parallel with one another, and is provided with the second resistance in parallel with capacitor, using being arranged in parallel with capacitor the
Two resistance carry out the surging signal in Absorption Capacitance, and the setting of second resistance improves the reliability of drive control circuit.
Optionally, the second absorbing circuit and the first absorbing circuit, which can be arranged simultaneously or select one, is separately provided, and absorbs second
When circuit and the first absorbing circuit are arranged simultaneously, the second absorbing circuit and the first absorbing circuit are in parallel.
In any of the above-described technical solution, further, the second absorbing circuit further include: current-limiting resistance, for limiting stream
Electric current through capacitive absorber element, current-limiting resistance are connected with capacitive absorber element.
In the technical scheme, the second absorbing circuit is provided with current-limiting resistance, and current-limiting resistance is connected with capacitive absorber element,
The charging current of capacitive absorber element is limited in defined model by the electric current that capacitive absorber element is flowed through when powering on for being limited in
In enclosing, prevent capacitive absorber element from being punctured by overcurrent.
In any of the above-described technical solution, further, drive control circuit further include: the 4th resistance, for absorbing electricity
The oscillator signal generated on anti-device, the 4th resistance are in parallel with reactor.
In the technical scheme, in the both ends of reactor the 4th resistance in parallel, with the oscillation letter generated on soaking reactor
Number, specifically, the 4th resistance increases system damping, and resistance value is less than 200 Europe, when bus capacitor is thin-film capacitor, setting
System stability can be improved in 4th resistance.
In any of the above-described technical solution, further, drive control circuit further include: sampling control circuit, with switch
Element is connected, and sampling control circuit is used to acquire the power supply signal of drive control circuit, according to power supply signal control switch member
Part on or off；Wherein, power supply signal include drive control circuit exchange survey power supply signal and two buss lines for telecommunications
Number.
In the technical scheme, sample circuit is provided in drive control circuit, sample circuit is acquired according to circuit AC
The power supply signal of the power supply signal of survey and/or the two buss lines is led according to the voltage magnitude control switch element of power supply signal
Logical or cut-off, and then the first absorbing circuit is controlled to the absorption process of surging signal.
The second aspect of the present invention provides a kind of air conditioner, comprising: motor；And as described in any of the above-described technical solution
Drive control circuit, the signal input part of the motor is connected to the drive control circuit, and the drive control circuit is defeated
Driving signal out is for driving the motor operation.Therefore the air conditioner has drive control described in any of the above-described embodiment
Whole beneficial effects of circuit, details are not described herein.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows the topological structure schematic diagram of AC-DC-exchange under normal circumstances；
Fig. 2 shows a drive control circuit schematic diagrames under normal circumstances；
Fig. 3 shows another drive control circuit schematic diagram under normal circumstances；
Fig. 4 shows the drive control circuit schematic diagram of one embodiment of the present of invention；
Fig. 5 shows the drive control circuit schematic diagram of another embodiment of the invention；
Fig. 6 shows the drive control circuit schematic diagram of yet another embodiment of the present invention；
Fig. 6 .1 shows the drive control circuit schematic diagram of yet another embodiment of the present invention；
Fig. 7 shows the drive control circuit schematic diagram of another embodiment of the invention；
Fig. 8 shows the drive control circuit schematic diagram of another embodiment of the invention；
Fig. 9 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 10 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 11 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 12 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 13 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 14 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 15 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 16 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 17 shows the drive control circuit schematic diagrames of another embodiment of the invention；
Figure 18 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 19 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 20 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 21 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 22 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 23 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 24 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 25 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 26 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 27 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 28 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 29 shows the drive control circuit schematic diagram of another embodiment of the invention；
Figure 30 shows the topological structure schematic diagram of the drive control circuit of one embodiment of the present of invention.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
It is explained in the following description many specific thin to facilitate a thorough understanding of the present invention, still, the present invention can be with
Implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by following public
The limitation of specific embodiment.
The drive control circuit described according to some embodiments of the invention and air conditioner are described referring to Fig. 4 to Figure 30.Such as
Shown in Fig. 4, in the embodiment of first aspect present invention, a kind of drive control circuit is provided, drive control circuit includes: inverse
Become bridge, be used for output drive signal, inverter bridge accesses between high voltage bus and low-voltage bus bar；Control circuit further include: reactance
Device drives the surging signal generated during load running for absorbing drive control circuit, and reactor access is in power grid and bears
Between load；Bus capacitor, for filtering out the surging signal in two buss lines, bus capacitor is accessed in the bus of inverter bridge input side
In route.
In this embodiment, it is provided with reactor in drive control circuit, reactor is for absorbing exchange input side and inverse
Become the surging signal that bridge generates, to improve the Surge handling capability of drive control circuit；Wherein, the resonance of reactor and bus capacitor
Frequency is fixed asWherein L is the inductance value of reactor, and C is the capacitance of bus capacitor, can be effectively prevent due to distribution electricity
Sense capacitance parameter leads to the unfixed situation of resonance frequency.Meanwhile selection uses the lower bus capacitor of capacitance instead of traditional
Electrolytic capacitor, specific to select thin-film capacitor as the bus capacitor on bus, thin-film capacitor is parallel to the input side of inverter bridge, string
It is associated between the high voltage bus and low-voltage bus bar, for filtering out the surging signal on bus.Apply skill provided by the invention
Art scheme significantly reduces production by using the electrolytic capacitor that the more cheap thin-film capacitor alternative cost of cost is high
Cost；The service life of thin-film capacitor up to 6250 hours, much larger than 2000 hours of general electrolytic capacitor, therefore can effectively improve
The service life of drive control circuit.Meanwhile the ESR (equivalent series resistance) of thin-film capacitor is smaller, influences in identical ripple current
Under, the calorific value of thin-film capacitor is much smaller than electrolytic capacitor, therefore can also effectively avoid causing to control since bus capacitor generates heat
The problem of efficiency processed reduces appearance, improves the reliability and working efficiency of drive control circuit.
Preferably, the capacitance of bus capacitor is less than preset capacity, and specifically, formula progress is calculated as follows in preset capacity
It calculates:
Wherein, CdcFor preset capacity, LSIt is the total inductance value of equivalent drive control circuit DC side, PLIt is drive control electricity
The bearing power on road, RSFor the all-in resistance of equivalent drive control circuit DC side, vdc0For busbar voltage average value, for example, with 7P
For model machine, C can be determined according to the calculation formuladc840uF is had to be larger than, preset capacity is 840uF or more, is being embodied
When be 1230uF.
Optionally, bus capacitor is thin-film capacitor, and the specification of thin-film capacitor is single 900V, 30uF.
Optionally, the resistance R0 for current limliting is additionally provided between reactor Ldc2 and rectifier bridge, resistance R0 is chosen as general
Logical resistor.
Optionally, as shown in figure 5, drive control circuit further include: current-limiting circuit, bus electricity when being powered on for the first time for limiting
The charging current of appearance, current-limiting circuit are connected on high voltage bus.
Since the capacitance of the bus capacitor of selection is lower, when there are surge voltage, due to the thin-film electro of low capacity
Appearance can not absorb excessive energy, and at this time when busbar voltage is higher than surge absoption capacitance terminal voltage, current-limiting circuit comes into force and limits
The charging current of bus capacitor when system powers on, to prevent bus capacitor from being punctured by overcurrent.
Optionally, as shown in figure 5, current-limiting circuit includes: thermo-sensitive resistor, bus capacitor fills when powering on for the first time for limiting
Electric current, thermo-sensitive resistor are connected on high voltage bus；Relay, for controlling the first resistance element of access to carry out current limliting or short
The first resistance element is connect to stop current limliting, relay is connected in parallel on the both ends of thermo-sensitive resistor.
In this embodiment, when occurring surging signal on high voltage bus, thermo-sensitive resistor will limit bus when powering on for the first time
The charging current of capacitor, and then ensure that bus capacitor is not breakdown, while the resistance value of thermo-sensitive resistor changes with temperature linearity, it is right
The rate of climb of charging current is limited.In thermo-sensitive resistor both ends parallel connection relay, then forming one has characteristic of switch
Thermo-sensitive resistor, when drive control circuit powers on for the first time, relay is in an off state, the first thermo-sensitive resistor and bus capacitor
The surging signal from Alternating Current Power Supply side is absorbed, after powering on for the first time, the electric current on high voltage bus is not very big situation
Under, the first relay closure, and then the first thermo-sensitive resistor is reduced to the metering function of high voltage bus.
In one embodiment of the invention, further, as shown in fig. 6, drive control circuit further include: first absorbs
Circuit, for absorbing the surging signal in two buss lines, the first absorbing circuit is accessed between bus capacitor and inverter bridge.
In this embodiment, the case where thin-film capacitor being selected for bus capacitor, when in circuit there are when surge voltage, by
Excessive surge energy can not be absorbed in thin-film capacitor, by the first absorbing circuit of setting access in bus capacitor and inverter bridge it
Between, with the surging signal on auxiliary bus bar capacitive absorption inverter bridge side bus route, to prevent bus capacitor from being hit by surging signal
It wears.
In one embodiment of the invention, further, as shown in fig. 6, the first absorbing circuit includes: resistive absorption member
Part, for absorbing surging signal, resistive absorber element is in parallel with the bus capacitor；Switch element, for regulating and controlling resistive absorption
Element absorbs the process of surging signal, and switch element is connected in series with resistive absorber element, and when switching elements conductive, resistive absorption is first
Part absorbs surging signal, and when switch element ends, resistive absorber element stops absorbing surging signal.
In this embodiment, the first absorbing circuit includes resistive absorber element, and resistive absorber element is for absorbing bus electricity
Hold the surging signal close to inverter bridge side.Specifically, switching elements conductive, resistive absorber element access drive control circuit is simultaneously
Surging signal is absorbed, specifically, resistive absorber element converts thermal energy for the electric energy of surging signal and discharges, to consume surge
Signal, bus capacitor is by surging signal punch through damage caused by avoiding because of the replacement lesser thin-film capacitor of capacitance.When on bus
After surging signal is reduced or is disappeared, switch element cut-off, resistive absorber element dialysis from drive control circuit, to avoid to suction
Normal electric signal in control circuit is received to have an impact.
In one embodiment of the invention, further, as shown in fig. 6, resistive absorber element includes: first resistor,
For absorbing surging signal, first resistor and switch element are connected in series, and the resistance value of first resistor and preset busbar voltage are protected
It is corresponding to protect threshold value；And/or the resistance value of first resistor is corresponding with the overcurrent protection threshold value of preset switch element.
In this embodiment, resistive absorber element includes first resistor, and first resistor and switch element are connected in series, when opening
When closing element conductive, the first absorbing circuit conducting, surging signal is absorbed by first resistor；When switch element cut-off, first inhales
It receives circuit to disconnect, first resistor does not reabsorb the electric signal in drive control circuit.Specifically, the resistance value of first resistor is in default
Busbar voltage protection threshold value and preset switch element overcurrent protection threshold value it is corresponding, to ensure resistive absorber element pair
The assimilation effect of surge.Wherein, voltage protection threshold value and current protection threshold value and component each in driving circuit are factory-designed
The voltage value that can bear is related to current value.
Further, as shown in fig. 6, when first resistor is non-noninductive resistance, resistive absorber element further include it is reversed simultaneously
It is coupled to the diode of first resistor, to form induced voltage Releasing loop.
Further, as shown in Fig. 6 .1, when first resistor is non-noninductive resistance, resistive absorber element further includes capacitor
C1With resistance R1, C1And R1After series connection, the both ends of first resistor are parallel to, to form induced voltage Releasing loop.
In one embodiment of the invention, further, as shown in fig. 6, resistive absorber element includes: first single-phase to lead
Logical element, is in parallel with first resistor, the conducting direction of the first single-phase breakover element and the current direction phase for flowing through first resistor
Instead.
In this embodiment, in the both ends of first resistor the first one-way conduction element in parallel, specifically, the first one-way conduction
Element is diode, is used to form the self induction voltage Releasing loop of first resistor, prevents the self induction voltage generated in first resistor
The reliability of switch element is had an impact.
Optionally, first resistor is inductive resistance.
Optionally, the conducting direction of the first single-phase breakover element is opposite with the current direction in first resistor.
In one embodiment of the invention, further, as shown in fig. 7, drive control circuit further include: second absorbs
Circuit, for absorbing the surging signal on high voltage bus and low-voltage bus bar, the second absorbing circuit includes: capacitive absorber element, is used
In absorbing surging signal, capacitive absorber element is in parallel with bus capacitor；Second one-way conduction element absorbs member for regulating and controlling capacitive
Part is connected in series to the absorption process of surging signal, the second one-way conduction element with capacitive absorber element.
In this embodiment, the second absorbing circuit includes the capacitive absorber element in parallel with bus capacitor, is inhaled by capacitive
The surging signal on element absorption bus is received, further includes and the concatenated second one-way conduction element of capacitive absorber element.Specifically,
Capacitive absorber element has capacitive, and the second capacitive absorber element is for limiting absorption of the capacitive absorber element to surging signal
Journey passes through the setting of one-way conduction element so that capacitive absorber element can only absorb the surging signal on high voltage bus, will be female
Line capacitance is distinguished with capacitive absorber element, is avoided and is used using capacitive absorber element as bus capacitor, reduces capacitive
The frequency of usage of absorber element improves the service life of the second absorbing circuit.
In one embodiment of the invention, further, as shown in fig. 7, capacitive absorber element includes at least one electricity
Appearance or the capacitor of multiple series connection and/or parallel connection, the second absorbing circuit further include: second resistance, for absorbing the first capacitive element
In surging signal, second resistance is in parallel with capacitor.
In this embodiment, capacitive absorber element includes one or more capacitors for absorbing surging signal, Duo Ge electricity
Appearance is serially connected and/or parallel with one another, and is provided with the second resistance in parallel with capacitor, using setting it is in parallel with capacitor second
Resistance carrys out the surging signal in Absorption Capacitance, and the setting of second resistance improves the reliability of drive control circuit.
Optionally, the second absorbing circuit and the first absorbing circuit, which can be arranged simultaneously or select one, is separately provided, and absorbs second
When circuit and the first absorbing circuit are arranged simultaneously, the second absorbing circuit and the first absorbing circuit are in parallel.
In one embodiment of the invention, further, as shown in fig. 7, the second absorbing circuit further include: current limliting electricity
Resistance, for limiting the electric current for flowing through capacitive absorber element, current-limiting resistance is connected with capacitive absorber element.
In this embodiment, the second absorbing circuit is provided with current-limiting resistance, and current-limiting resistance is connected with capacitive absorber element, uses
The charging current of capacitive absorber element is limited in defined range by the electric current that capacitive absorber element is flowed through when being limited in and powering on
It is interior, prevent capacitive absorber element from being punctured by overcurrent.
In one embodiment of the invention, further, drive control circuit further include: the 4th resistance, for absorbing
The oscillator signal generated on reactor, the 4th resistance are in parallel with reactor.
In this embodiment, in the both ends of reactor 4th resistance in parallel, with the oscillator signal generated on soaking reactor,
Specifically, the 4th resistance increases system damping, and resistance value is less than 200 Europe, when bus capacitor is thin-film capacitor, setting the 4th
System stability can be improved in resistance.
In one embodiment of the invention, further, as shown in figure 8, current-limiting circuit may be configured as three or two,
Specially PTC1、PTC2And PTC3, or setting PTC1、PTC2And PTC3In any two, such as PTC1And PTC2, it is located at friendship
On stream input source three-phase or any two-phase input line, it is particularly located between filter circuit and rectifier bridge, when the system is first powered on, after
Electric appliance disconnects so that thermo-sensitive resistor accesses circuit, and then limits the charging current of bus capacitor.
In one embodiment of the invention, further, as shown in figure 9, current-limiting circuit is set as three, specially
PTC1、PTC2And PTC3, it is located on the three-phase bus of input AC source side, is particularly located between filter circuit and rectifier bridge,
When powering on for the first time, relay is disconnected so that thermo-sensitive resistor accesses circuit, and then limits the charging current of bus capacitor.It drives simultaneously
The first absorbing circuit is provided in control circuit.
In one embodiment of the invention, further, as shown in Figure 10 and Figure 11, current-limiting circuit is set as three,
Specially PTC1、PTC2And PTC3, it is located on the three-phase bus of input AC source side, is particularly located at filter circuit and rectifier bridge
Between, when the system is first powered on, relay disconnects so that thermo-sensitive resistor accesses circuit, and then limits the charging current of bus capacitor.
It is provided with the first absorbing circuit and the second absorbing circuit simultaneously in drive control circuit simultaneously, as shown in Figure 10, first absorbs electricity
Road is between bus capacitor C and inverter bridge, and the second absorbing circuit is between rectifier bridge and reactor；Or as shown in figure 11,
First absorbing circuit is between bus capacitor C and inverter bridge, and the second absorbing circuit is between reactor and bus capacitor C.
Voltage for the scheme shown in Figure 11, when system operates normally, on the capacitive absorber element of the second absorbing circuit
DC bus-bar voltage maximum of points is maintained, the corresponding switch element of resistive absorber element disconnects at this time；Due to surge energy master
Compressor winding, the inductance afterflow of alternating current-direct current side and compression maneuver energy when being shut down from power input, the system failure；When depositing
In surge voltage, since the thin-film capacitor of low capacity can not absorb excessive energy, busbar voltage is higher than surge absoption capacitor
When holding voltage, capacitive absorber element works, and remaining energy flows into thin-film capacitor and surge absoption capacitance module；With surge
Energy is absorbed, and DC bus-bar voltage slowly increases (surge absoption capacitor is bigger, and DC bus-bar voltage lifting is slower)；Work as direct current
(it is such as set as 720V, practical adjustable) when busbar voltage is higher than some setting value, resistive absorber element intervention, switch element
Start in the form of pulse width modulation (PWM) or fixed form is opened, to guarantee that busbar voltage Shi Jinke occurs in surge voltage
It can be steady.
In one embodiment of the invention, further, as shown in figure 12, current-limiting circuit is set on high voltage bus,
When the system is first powered on, relay disconnects so that thermo-sensitive resistor accesses circuit, and then limits the charging current of bus capacitor.It drives simultaneously
Dynamic control circuit includes the second absorbing circuit, absorbs surging signal by the capacitive absorber element in the second absorbing circuit.
In one embodiment of the invention, further, as shown in Figure 13 and Figure 14, current-limiting circuit is set to high pressure mother
On line, when the system is first powered on, relay is disconnected so that thermo-sensitive resistor accesses circuit, and then limits the charging current of bus capacitor.
It is provided with the first absorbing circuit and the second absorbing circuit simultaneously in drive control circuit simultaneously, as shown in figure 13, first absorbs electricity
Road is between bus capacitor C and inverter bridge, and the second absorbing circuit is between current-limiting circuit and reactor；Or such as Figure 14 institute
Show, the first absorbing circuit between bus capacitor C and inverter bridge, the second absorbing circuit be located at reactor and bus capacitor C it
Between.
In one embodiment of the invention, further, as shown in figure 15, current-limiting circuit is set as three, specially
PTC1、PTC2And PTC3, it is located on the three-phase bus of input AC source side, when the system is first powered on, relay disconnects so that temperature sensitive
Resistance accesses circuit, and then limits the charging current of bus capacitor.It is provided with the second absorbing circuit in drive control circuit simultaneously,
Breakover element is wherein provided in the second absorbing circuit, breakover element is specially switch element, and surging signal is weaker in systems
When, switch element disconnects, and absorbs surging signal by bus capacitor；When surging signal is stronger in system, switch element closure,
Second absorbing circuit accesses between high voltage bus and low-voltage bus bar, assist absorption surging signal.
In one embodiment of the invention, further, as shown in figure 16, current-limiting circuit is set on high voltage bus,
When the system is first powered on, relay disconnects so that thermo-sensitive resistor accesses circuit, and then limits the charging current of bus capacitor.It drives simultaneously
It is provided with the second absorbing circuit in dynamic control circuit, wherein being provided with breakover element in the second absorbing circuit, breakover element is specific
For switch element, when surging signal is weaker in systems, switch element is disconnected, and absorbs electrophoresis signal by bus capacitor；When being
When surging signal is stronger in system, switch element closure, the second absorbing circuit is accessed between high voltage bus and low-voltage bus bar, and auxiliary is inhaled
Receive surging signal.
In one embodiment of the invention, further, as shown in figure 17, current-limiting circuit is set on high voltage bus,
When the system is first powered on, relay disconnects so that thermo-sensitive resistor accesses circuit, and then limits the charging current of bus capacitor.It drives simultaneously
The first absorbing circuit and the second absorbing circuit are provided in dynamic control circuit, the first absorbing circuit and the second absorbing circuit distinguish position
In the two sides of bus capacitor, wherein being provided with breakover element, specially switch element in the second absorbing circuit, while first absorbs
Switch element is also equipped in circuit, when surging signal is weaker in systems, the first absorbing circuit and the second absorbing circuit switch
Element disconnects, and by bus capacitor and absorbs electrophoresis signal；When surging signal is stronger in system, corresponding switch element is controlled
Closure, so that between the first absorbing circuit and/or the second absorbing circuit access high voltage bus and low-voltage bus bar, assist absorption surge
Signal.
In one embodiment of the invention, further, as shown in figure 18, current-limiting circuit is set as three, specially
PTC1、PTC2And PTC3, it is located on the three-phase bus of input AC source side, when the system is first powered on, relay disconnects so that temperature sensitive
Resistance accesses circuit, and then limits the charging current of bus capacitor.The first absorbing circuit is provided in drive control circuit simultaneously
With the second absorbing circuit, the first absorbing circuit and the second absorbing circuit are located at the two sides of bus capacitor, wherein second absorbs
It is provided with breakover element, specially switch element in circuit, while being also equipped with switch element in the first absorbing circuit, in system
When middle surging signal is weaker, the first absorbing circuit and the second absorbing circuit switch element are disconnected, and are passed through bus capacitor and are absorbed electricity
Swimming signal；When surging signal is stronger in system, corresponding switch element closure is controlled, so that the first absorbing circuit and/or the
Two absorbing circuits access between high voltage bus and low-voltage bus bar, assist absorption surging signal.
In one embodiment of the invention, further, as shown in figure 19, current-limiting circuit is set as three, specially
PTC1、PTC2And PTC3, it is located on the three-phase bus of input AC source side, when the system is first powered on, relay disconnects so that temperature sensitive
Resistance accesses circuit, and then limits the charging current of bus capacitor.The first absorbing circuit is provided in drive control circuit simultaneously
With the second absorbing circuit, the first absorbing circuit and the second absorbing circuit are located at the two sides of bus capacitor, wherein second absorbs
Breakover element, specially diode are provided in circuit, so that the surging signal on bus can enter second by diode
Absorbing circuit, and the discharge current of the capacitive absorber element on the second absorbing circuit is ended by diode, it will not be on bus
Electric signal impacts.Meanwhile the 4th resistance R is parallel on reactor4, for reducing the oscillation between reactor and bus capacitor
Signal prevents the system fluctuation as caused by the LC oscillation effect between reactor and bus capacitor, to improve system stability.
In one embodiment of the invention, further, as shown in figure 20, current-limiting circuit is set on high voltage bus,
When the system is first powered on, relay disconnects so that thermo-sensitive resistor accesses circuit, and then limits the charging current of bus capacitor.It drives simultaneously
The first absorbing circuit and the second absorbing circuit are provided in dynamic control circuit, the first absorbing circuit and the second absorbing circuit distinguish position
In the two sides of bus capacitor, wherein breakover element, specially diode are provided in the second absorbing circuit, so that the wave on bus
The second absorbing circuit, and the discharge current of the capacitive absorber element on the second absorbing circuit can be entered by diode by gushing signal
Ended by diode, the electric signal on bus will not be impacted.Meanwhile the 4th resistance R is parallel on reactor4, it is used for
The oscillator signal between reactor and bus capacitor is reduced, prevents from causing due to the LC oscillation effect between reactor and bus capacitor
System fluctuation, to improve system stability.
In one embodiment of the invention, further, as shown in Figure 21 to Figure 26, drive control circuit includes third
Absorbing circuit, third absorbing circuit include current limiting element, capacitive absorber element and one-way conduction element, wherein current limiting element can
Thermo-sensitive resistor PTC or current-limiting resistance R is selected, and in thermo-sensitive resistor PTC or the switch element of the both ends current-limiting resistance R parallel connection.Tool
Body, compressor winding when surge energy is mainly derived from power input, model machine disorderly closedown, alternating current-direct current side inductance afterflow and
Compress maneuver energy；When there are surge voltage, since the thin-film capacitor of low capacity can not absorb excessive energy, busbar voltage is high
Capacitive absorber element (specifically includes capacitor C in third absorbing circuit2And C3) end voltage when, third absorbing circuit works,
Remaining energy flows into bus capacitor and third absorbing circuit, and switch element is closed at this time, thermo-sensitive resistor PTC or current-limiting resistance R
It is short-circuited, surge energy can be rapidly absorbed；When power supply disconnection or DC bus-bar voltage (are preferably provided with lower than fixed value
For 200V), judge that no current flows through in switch element at this time, thus control switch element disconnect (use AC relay as
Switch element just needs to judge whether no current flows through switch element, and normal IGBT or DC relay can break at any time
Open), i.e., when powering on, thermo-sensitive resistor PTC or current-limiting resistance R are reached by the circuit of series connection access capacitive absorber element
Current limliting purpose；Hereafter closure switch element is realized to be shorted out thermo-sensitive resistor PTC or current-limiting resistance R and quickly absorbs surge energy
Purpose.
Further, as shown in figure 21, current limiting element is between single-phase breakover element and capacitive absorber element；Or as schemed
Shown in 22, current limiting element is between high voltage bus and single-phase breakover element；Or as shown in figure 23, current limiting element is located at capacitive suction
It receives between element and low-voltage bus bar.
Further, as shown in Figure 24 to Figure 26, current-limiting resistance R1 (thermo-sensitive resistor PTC or current-limiting resistance R) can pass through
Connect two resistance R4And R5It realizes, two of them resistance R4And R5Resistance value and be equal to R1Resistance value.Wherein, switch element is simultaneously
The both ends of resistance R4 are coupled to, in system electrification, resistance R4And R5It connects simultaneously and carries out metering function into third current-limiting circuit,
The surge absoption stage after powering on is closed switching element to be shorted resistance R4, resistance R at this time5Metering function is carried out alone.
In one embodiment of the invention, further, as shown in figure 27, the is provided in drive control circuit simultaneously
One absorbing circuit and third absorbing circuit；Wherein, including current limiting element, capacitive absorber element and one-way conduction element, current limliting are first
Part includes current-limiting resistance R4And R5, R5Between one-way conduction element and capacitive absorber element；R4Positioned at capacitive absorber element and
Between low-voltage bus bar, switch element is parallel to resistance R4Both ends；In system electrification, resistance R4And R5It connects simultaneously into third
Current-limiting circuit carries out metering function, and the surge absoption stage after the power-up is closed switching element to be shorted resistance R4, resistance at this time
R5Metering function is carried out alone.
In one embodiment of the invention, further, as shown in Figure 28 and Figure 29, it is provided in drive control circuit
4th absorbing circuit.4th absorbing circuit includes capacitive absorber element, resistive absorber element and current limiting element；Wherein capacitive absorbs
Element is connected in series with current limiting element；Capacitive absorber element includes breakover element, Absorption Capacitance, current-limiting resistance R1 and discharge resistance,
Absorption Capacitance is set as two, respectively C2And C3, discharge resistance R2And R3It is parallel to C respectively2、C3Both ends；Breakover element tool
Body is single-phase breakover element or switch element；Resistive absorber element includes absorption resistance, is parallel to the afterflow at absorption resistance both ends
Circuit, switch element and flow element, it is preferable to use the diodes of reverse parallel connection for continuous current circuit；When power supply disconnection or direct current
When busbar voltage is lower than fixed value, if flow element judges that no current passes through in switch element, control switch element is disconnected at this time.
Further, as shown in figure 28, the input terminal of resistance element is connected between breakover element and current-limiting resistance R1, resistance
The output end of property element is connected to low-voltage bus bar.
Further, as shown in figure 29, the input terminal of resistance element is connected to current-limiting resistance R1With Absorption Capacitance C2Between,
The output end of resistance element is connected to low-voltage bus bar.
In the corresponding embodiment of above-mentioned Fig. 4 to Figure 29, Lac refers to that inductor models and input power cord are surveyed in practical exchange
Inductance, it includes inductance and resistance, inductance value at alternating side used in existing type be 25mH, 500 milliohms, input electricity
The inductance value of source line is less than or equal to 10mH (numerical value amplification), and (resistance of the conducting wire of actual use is about not less than 0.5 Europe for resistance value
For 1.2 Europe)；Ldc refers to actual DC side inductor models, and it includes inductance and resistance, the inductance value of Ldc is 4.5mH,
120 milliohms；R4For damping resistance, damping resistance R4Ldc the inductance value selected to be not provided with when 4.5mH, capacity be 6KW
Model machine on be not provided with Ldc, R can also be not provided with4；Wherein, Lac and Ldc be exist for EMC harmonic requirement, if
It is the region for having EMX harmonic requirement, there may be Lac or Ldc on model machine, can also be coexisted with Lac and Ldc.And for no harmonic wave
It is required that region, Lac and Ldc are not present, but in order to solve the problems, such as high-frequency harmonic (the case where ignoring the problem, can be with
Without using Ldc inductance), a lesser Ldc2 of inductance value, and this lesser Ldc2 can be used at the position Ldc of circuit topology
Upper one in parallel small damping resistance R4To improve system stability.
In one embodiment of the invention, further, drive control circuit further include: sampling control circuit is (in figure
It is not shown), sampling control circuit is used to acquire the power supply signal of drive control circuit, is led according to power supply signal control switch element
Logical or cut-off；Wherein, power supply signal includes the power supply signal of drive control circuit the exchange power supply signal surveyed and two buss lines.
In this embodiment, as shown in figure 30, sampling control circuit 20, controlling of sampling electricity are provided in drive control circuit
Road 20 is acquired according to the circuit AC power supply signal surveyed and/or the power supply signal of the two buss lines, according to the electricity of power supply signal
Pressure amplitude value control switch element conductive or cut-off, and then the first absorbing circuit is controlled to the absorption process of surging signal.
Optionally, the power supply signal for exchanging survey is specially electric signal between AC power supply module 10 and filter circuit 12.
Optionally, the power supply signal for exchanging survey is specially electric signal between filter circuit 12 and rectifier bridge 14.
Optionally, the power supply signal of two buss lines includes the electric signal between rectifier bridge 14 and absorbing circuit 16, specially
Electric signal between rectifier bridge 14 and reactor.
Optionally, the power supply signal of two buss lines includes the electric signal between absorbing circuit 16 and inverter bridge 18.
In the embodiment of the second aspect of the present invention, a kind of air conditioner is provided, comprising: motor；And such as above-mentioned
Drive control circuit described in one embodiment, the signal input part of the motor are connected to the drive control circuit, the drive
The driving signal of dynamic control circuit output is for driving the motor operation.Therefore the air conditioner has any of the above-described embodiment institute
The whole beneficial effects for the drive control circuit stated, details are not described herein.
In description of the invention, term " multiple " then refers to two or more, unless otherwise restricted clearly, term
The orientation or positional relationship of the instructions such as "upper", "lower" is to be merely for convenience of retouching based on orientation or positional relationship described in attached drawing
It states the present invention and simplifies description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention；Term " connection ", " installation ", " fixation " etc. should all
It is interpreted broadly, for example, " connection " may be fixed connection or may be dismantle connection, or integral connection；It can be straight
Connect it is connected, can also be indirectly connected through an intermediary.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the description of the present invention, the description meaning of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Refer to that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present invention, identical embodiment or example are not necessarily referring to schematically stating for above-mentioned term.And
And the particular features, structures, materials, or characteristics of description can be in any one or more of the embodiments or examples with suitable
Mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of drive control circuit, the drive control circuit includes: inverter bridge, is used for output drive signal, the inversion
It bridges between high voltage bus and low-voltage bus bar；It is characterized in that, the drive control circuit further include:
Reactor, for absorbing the surging signal generated during the drive control circuit driving load running, the reactance
Device accesses between power grid and the load；
Bus capacitor, for filtering out the surging signal in two buss lines, the bus capacitor access is in the inverter bridge input side
The two buss lines in.
2. drive control circuit according to claim 1, which is characterized in that further include:
First absorbing circuit, for absorbing the surging signal in the two buss lines, the first absorbing circuit access is in described
Between bus capacitor and the inverter bridge.
3. drive control circuit according to claim 2, which is characterized in that first absorbing circuit includes:
Resistive absorber element, for absorbing the surging signal, the resistive absorber element is in parallel with the bus capacitor；
Switch element absorbs the process of the surging signal, the switch element and institute for regulating and controlling the resistive absorber element
It states resistive absorber element to be connected in series, when the switching elements conductive, the resistive absorber element absorbs the surging signal, described
When switch element ends, the resistive absorber element stops absorbing the surging signal.
4. drive control circuit according to claim 3, which is characterized in that the resistive absorber element includes:
First resistor, for absorbing the surging signal, the first resistor and the switch element are connected in series, and described first
The resistance value of resistance is corresponding with preset busbar voltage protection threshold value；And/or
The resistance value of the first resistor is corresponding with the overcurrent protection threshold value of the preset switch element.
5. drive control circuit according to claim 4, which is characterized in that the resistive absorber element includes:
First one-way conduction element, is in parallel with the first resistor, the conducting direction and stream of the first one-way conduction element
Current direction through the first resistor is opposite.
6. drive control circuit according to claim 1, which is characterized in that further include:
Second absorbing circuit, for absorbing the surging signal on the high voltage bus and the low-voltage bus bar,
Second absorbing circuit includes:
Capacitive absorber element, for absorbing the surging signal, the capacitive absorber element is in parallel with the bus capacitor；
Second one-way conduction element, for regulating and controlling the capacitive absorber element to the absorption process of the surging signal, described
Two one-way conduction elements are connected in series with the capacitive absorber element.
7. drive control circuit according to claim 6, which is characterized in that
The capacitive absorber element includes:
At least one capacitor or the capacitor of multiple series connection and/or parallel connection,
Second absorbing circuit further include:
Second resistance, for absorbing the surging signal in the capacitor, the second resistance is in parallel with the capacitor.
8. drive control circuit according to claim 7, which is characterized in that second absorbing circuit further include:
Current-limiting resistance, for limiting the electric current for flowing through the capacitive absorber element, the current-limiting resistance and the capacitive absorb member
Part series connection.
9. drive control circuit according to any one of claim 1 to 8, which is characterized in that further include:
4th resistance, for absorbing the oscillator signal generated on the reactor, the 4th resistance is in parallel with the reactor.
10. drive control circuit according to claim 3, which is characterized in that further include:
Sampling control circuit is connected with the switch element, and the sampling control circuit is for acquiring the drive control electricity
The power supply signal on road controls the switching elements conductive or cut-off according to the power supply signal；
Wherein, the power supply signal includes the power supply of drive control circuit the exchange power supply signal surveyed and the two buss lines
Signal.
11. a kind of air conditioner, which is characterized in that the air conditioner includes:
Motor；And
Drive control circuit as described in any one of claims 1 to 10, the signal input part of the motor are connected to described
Drive control circuit, the driving signal of the drive control circuit output is for driving the motor operation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910041294 | 2019-01-16 | ||
| CN2019100412945 | 2019-01-16 |
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| CN110071627A true CN110071627A (en) | 2019-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910447810.4A Pending CN110071627A (en) | 2019-01-16 | 2019-05-27 | Drive control circuit and air conditioner |
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| CN (1) | CN110071627A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114337326A (en) * | 2020-11-12 | 2022-04-12 | 华为数字能源技术有限公司 | A power converter, protection method and system |
| CN115242066A (en) * | 2022-09-15 | 2022-10-25 | 荣耀终端有限公司 | A power circuit and its product |
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| CN209627226U (en) * | 2019-01-16 | 2019-11-12 | 广东美的制冷设备有限公司 | Drive control circuit and air conditioner |
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| CN101714826A (en) * | 2004-12-09 | 2010-05-26 | 大金工业株式会社 | Multi-phase current supplying circuit, driving apparatus, compressor, and air conditioner |
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