CN106711978B - Current foldback circuit, method and the air conditioner of adjustable IPM module - Google Patents
Current foldback circuit, method and the air conditioner of adjustable IPM module Download PDFInfo
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- CN106711978B CN106711978B CN201710010246.0A CN201710010246A CN106711978B CN 106711978 B CN106711978 B CN 106711978B CN 201710010246 A CN201710010246 A CN 201710010246A CN 106711978 B CN106711978 B CN 106711978B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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Abstract
The invention discloses current foldback circuit, method and the air conditioners of a kind of adjustable IPM module; wherein; IPM module includes shunting output end and overcurrent protection pin; circuit includes: the sample circuit including sampling resistor R1; sampling resistor R1, which is connected to, to be shunted between output end and ground, and forms first node with output end is shunted；For adjusting the overcurrent protection value of IPM module according to the temperature of the type of compressor, environment temperature and IPM module, and according to the adjustment circuit of overcurrent protection value adjustment reference voltage signal；Comparison execution circuit including comparator IC1 and execution circuit, for exporting according to the control signal corresponding with the reference voltage signal generation of self-adjusting circuit is carried out of the real-time voltage signal from sample circuit, and by control signal to IPM module.Thereby, it is possible to give full play to refrigerating capacity under heating capacity or hot environment under the low temperature environment of compressor.
Description
Technical field
The present invention relates to air conditioner technical fields, and in particular to a kind of current foldback circuit of adjustable IPM module, one kind
Air conditioner and a kind of over-current protection method of adjustable IPM module.
Background technique
Currently, IPM (Intelligent Power Module, intelligent power module) overcurrent protection is all made of fixed resistance
Design reference voltage is divided, no matter what condition, protective current point has been set.
When practical application, ferrite compressor is easy demagnetization at low ambient temperatures, needs to pay close attention under cryogenic conditions
Overcurrent protection value setting, cannot be greater than its demagnetization current value；And rare earth compressor is easy demagnetization under high temperature environment, needs emphasis
Pay close attention to the overcurrent protection value setting under hot environment.By taking ferrite compressor as an example, in order to guarantee the demagnetization current under low temperature, just
The characteristic for having to sacrifice under high temperature thus directly sacrifices so can be run in the case of a high temperature with low-down frequency
The high-temperature refrigeration ability of air-conditioning.
In addition, the reliability in order to guarantee IPM module, the temperature of IPM module has been used as a condition to control air-conditioning
Running frequency, but it is existing control be more to participate in frequency limit under direct hot environment.And in actually using, IPM module temperature
It spends high frequency limit seldom to occur, for the drop volume that such IPM module uses with regard to excessive, system does not perform to the limit.
Summary of the invention
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, of the invention
First purpose is to propose a kind of current foldback circuit of adjustable IPM module.The circuit can give full play to compressor
Refrigerating capacity under heating capacity or hot environment under low temperature environment.
Second object of the present invention is to propose a kind of over-current protection method of adjustable IPM module.
Third object of the present invention is to propose a kind of air conditioner device.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of overcurrent protection of adjustable IPM module
Circuit, which is characterized in that the IPM module includes shunting output end and overcurrent protection pin, and the circuit includes: sampling electricity
Road, the sample circuit include sampling resistor R1, and the sampling resistor R1 is connected between shunting output end and the ground, and with
The shunting output end forms first node；Adjustment circuit, for according to the type of compressor, environment temperature and the IPM mould
The temperature of block adjusts the overcurrent protection value of the IPM module, and adjusts reference voltage signal according to the overcurrent protection value；Compare
Execution circuit, the relatively execution circuit includes comparator IC1 and execution circuit, the negative input end of the comparator IC1 and institute
It states first node to be connected, the positive input terminal of the comparator IC1 is connected with the adjustment circuit, the output of the comparator IC1
End is connected by the execution circuit with the overcurrent protection pin, and the relatively execution circuit is used for according to from the sampling
The real-time voltage signal of circuit control signal corresponding with the reference voltage signal generation from the adjustment circuit, and will be described
Control signal is exported to the IPM module.
The current foldback circuit of the adjustable IPM module of the embodiment of the present invention, by adjusting circuit according to the class of compressor
The overcurrent protection value of the temperature adjustment IPM module of type, environment temperature and IPM module, and it is corresponding according to overcurrent protection value acquisition
Reference voltage signal, and then generated by comparing the comparator in execution circuit according to reference voltage signal and real-time voltage signal
Corresponding control signal, and judged whether according to the control signal to IPM module by comparing the execution module in execution circuit
Carry out overcurrent protection.Thereby, it is possible to give full play to the energy that freezes under heating capacity or hot environment under the low temperature environment of compressor
Power.
In addition, the current foldback circuit of adjustable IPM module according to the above embodiment of the present invention can also have it is as follows
Additional technical characteristic:
According to one embodiment of present invention, the adjustment circuit, comprising: divider resistance R2, the divider resistance R2's
One end is connected with default power supply, and the other end of the divider resistance R2 is connected with the positive input terminal of the comparator IC1, and is formed
Second node；Divider resistance R3, one end of the divider resistance R3 are connected with the second node；Divider resistance R4, described point
One end of piezoresistance R4 is connected with the other end of the hot end of the switching tube Q1 and the divider resistance R3 respectively；Switching tube
Q1 and its controller, the cold end of the switching tube Q1 is connected with the other end of the divider resistance R4, and is grounded, described to open
The control terminal for closing pipe Q1 is connected with the controller.
According to one embodiment of present invention, the sample circuit, further includes: filter resistance R5, the filter resistance R5
One end be connected with the first node, the other end of the filter resistance R5 is connected with the positive input terminal of the comparator IC1；
Filter capacitor C1, one end of the filter capacitor C1 are connected with the positive input terminal of the comparator IC1, the filter capacitor C1's
Other end ground connection.
According to one embodiment of present invention, the execution circuit, comprising: resistance R6 and resistance R7, the resistance R6's
One end is connected with the output end of the comparator IC1, and the other end of the resistance R6 is connected with one end of the resistance R7, and shape
At third node, the other end of the resistance R7 is connected with default power supply；Switching tube Q2, the control terminal of the switching tube Q2 and institute
It states third node to be connected, the hot end of the switching tube Q2 is connected with the default power supply；Resistance R8, resistance R9 and capacitor
C2, one end of the resistance R8 are connected with the cold end of one end of the resistance R9 and the switching tube Q2 respectively, the electricity
The other end of resistance R9 is connected with one end of the overcurrent protection pin and the capacitor C2 respectively, another termination of the capacitor C2
Ground.
According to one embodiment of present invention, the switching tube Q1 is metal-oxide-semiconductor, and the drain electrode of the metal-oxide-semiconductor is the switch
The hot end of pipe Q1, the source electrode of the metal-oxide-semiconductor are the cold end of the switching tube Q1, and the grid of the metal-oxide-semiconductor is described
The control terminal of switching tube Q1.
According to one embodiment of present invention, the switching tube Q2 is triode or metal-oxide-semiconductor.
According to one embodiment of present invention, the adjustment circuit, further includes: resistance R10 and resistance R11, the resistance
R10 is connected between the control terminal and the controller of the switching tube Q1, and the resistance R11 is connected to the switching tube Q1's
Between control terminal and ground.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of overcurrent protection of adjustable IPM module
Method, comprising the following steps: whether the type for judging compressor is ferrite compressor or rare earth compressor；If the compression
Machine is the ferrite compressor, then obtains the demagnetization current value and current environmental temperature of the ferrite compressor, and judge
Whether the current environmental temperature is more than or equal to the first preset temperature；If the current environmental temperature is more than or equal to described first
Whether preset temperature, then obtain the temperature of the IPM module, and judge the temperature of the IPM module less than the second preset temperature；
If the temperature of the IPM module is less than second preset temperature, increase the overcurrent protection value of the IPM module；If
The temperature of the IPM module is more than or equal to second preset temperature, then reduces the overcurrent protection value of the IPM module.
The over-current protection method of the adjustable IPM module of the embodiment of the present invention, first determines whether the type of compressor, if pressure
Contracting machine is ferrite compressor, then further judges current environmental temperature, if current environmental temperature is higher, further determine
The temperature of IPM module, if the temperature of IPM module is in the normal range, adjustable height overcurrent protection value, thereby, it is possible to abundant
Play compressor refrigerating capacity in a high temperauture environment.
In addition, the over-current protection method of adjustable IPM module according to the above embodiment of the present invention can also have it is as follows
Additional technical characteristic:
According to one embodiment of present invention, the method, further includes: if the current environmental temperature is less than described the
One preset temperature, then judge whether the current environmental temperature is less than or equal to third preset temperature；If the current environment temperature
Degree is less than or equal to the third preset temperature, then sets the IPM module for the demagnetization current value of the ferrite compressor
Overcurrent protection value.
According to one embodiment of present invention, the method, further includes: if the compressor is rare earth compression
Machine, then obtain the demagnetization current value and current environmental temperature of the rare earth compressor, and whether judges the current environmental temperature
More than or equal to the first preset temperature；If the current environmental temperature be more than or equal to first preset temperature, obtain described in
The temperature of IPM module, and judge the temperature of the IPM module whether less than the second preset temperature；If the temperature of the IPM module
Degree is less than second preset temperature, then increases the overcurrent protection value of the IPM module, and the IPM module after increasing
Overcurrent protection value is less than or equal to the demagnetization current value of the rare earth compressor；If the temperature of the IPM module is more than or equal to institute
The second preset temperature is stated, then reduces the overcurrent protection value of the IPM module.
According to one embodiment of present invention, the method, further includes: if the current environmental temperature is less than described the
One preset temperature, then judge whether the current environmental temperature is less than or equal to third preset temperature；If the current environment temperature
Degree is less than or equal to the third preset temperature, then increases the overcurrent protection value of the IPM module.
Further, the invention proposes a kind of air conditioners comprising the overcurrent protection electricity of above-mentioned adjustable IPM module
Road.
The air conditioner of the embodiment of the present invention can be given full play to by the current foldback circuit of above-mentioned adjustable IPM module
The refrigerating capacity under heating capacity or hot environment under low temperature environment.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
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 is the structural schematic diagram of the current foldback circuit of adjustable IPM module according to an embodiment of the invention；
Fig. 2 is the structural representation of the current foldback circuit of adjustable IPM module accord to a specific embodiment of that present invention
Figure；
Fig. 3 is the flow chart of the over-current protection method of adjustable IPM module according to an embodiment of the invention；And
Fig. 4 is the flow chart of the over-current protection method of adjustable IPM module in accordance with another embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of embodiment is shown in the accompanying drawings, wherein identical from beginning to end
Or similar label indicates same or similar element or element with the same or similar functions.It is retouched below with reference to attached drawing
The embodiment stated is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings current foldback circuit, method and the sky of the adjustable IPM module of the embodiment of the present invention are described
Adjust device.
Fig. 1 is the structural schematic diagram of the current foldback circuit of adjustable IPM module according to an embodiment of the invention.Such as
Shown in Fig. 1, IPM module includes shunting output end and overcurrent protection pin, the circuit include: sample circuit 10, adjustment circuit 20
With compare execution circuit 30.
Wherein, sample circuit 10 includes sampling resistor R1, and sampling resistor R1, which is connected to, to be shunted between output end and ground, and with
It shunts output end and forms first node a (not shown in figure 1).Adjustment circuit 20 is for type, the environment temperature according to compressor
The overcurrent protection value of IPM module is obtained with the temperature of IPM module, and reference voltage signal is adjusted according to the overcurrent protection value.Than
It include comparator IC1 and execution circuit 31 compared with execution circuit 30, the negative input end of comparator IC1 is connected with first node a, compares
The positive input terminal of device IC1 is connected with adjustment circuit 20, and the output end of comparator IC1 passes through execution circuit 31 and overcurrent protection pin
Be connected, compare execution circuit 30 for according to real-time voltage signal from sample circuit 10 and the reference that carrys out self-adjusting circuit it is electric
It presses signal to generate corresponding control signal, and control signal is exported to IPM module.
Optionally, comparator IC1 can select LM2903 or LM393 etc..
In an embodiment of the present invention, type of compressor may include ferrite compressor and rare earth compressor.Wherein, iron
Oxysome compressor is easy demagnetization at low ambient temperatures, and rare earth compressor is easy demagnetization under high temperature environment, and at low ambient temperatures,
The temperature of IPM module is lower, and under high temperature environment, the temperature of IPM module may be higher, and then can be according to the class of compressor
Type, environment temperature and IPM module temperature adjustment IPM module overcurrent protection value, with give full play to compressor high-temperature refrigeration or
The ability of low-temperature heating.
Specifically, adjustment circuit 20 obtains corresponding according to the temperature of the type of compressor, environment temperature and IPM module
The overcurrent protection value of IPM module, and reference voltage signal can be adjusted according to the overcurrent protection value.Comparator IC1 then can root
According to the real-time voltage signal that the reference voltage signal and sample circuit input, corresponding control signal is exported, and then pass through execution
Module executes the control signal, i.e., when reference voltage signal is more than or equal to real-time voltage signal, does not execute overcurrent to IPM module
Protection operation；When reference voltage signal is less than real-time voltage signal, overcurrent protection operation is executed to IPM module.Thereby, it is possible to
Air conditioner is set to give full play to the refrigerating capacity under hot environment or the heating capacity under low temperature environment.
Specifically, as shown in Fig. 2, adjustment circuit 20 includes divider resistance R2, divider resistance R3, divider resistance R4 and switch
Pipe Q1 and its controller 21.
Wherein, one end of divider resistance R2 is connected with default power supply VCC, the other end and comparator IC1 of divider resistance R2
Positive input terminal be connected, and form second node b.One end of divider resistance R3 is connected with second node b.The one of divider resistance R4
End is connected with the other end of the hot end of switching tube Q1 and divider resistance R3 respectively.The cold end and partial pressure electricity of switching tube Q1
The other end for hindering R4 is connected, and is grounded, and the control terminal of switching tube Q1 is connected with controller 21.
In one embodiment of the invention, switching tube Q1 is metal-oxide-semiconductor, and the drain electrode of metal-oxide-semiconductor is the high potential of switching tube Q1
End, the source electrode of metal-oxide-semiconductor are the cold end of switching tube Q1, and the grid of metal-oxide-semiconductor is the control terminal of switching tube Q1.
Wherein, the voltage for presetting power supply VCC can be+5V.
Specifically, controller 21 obtains corresponding IPM according to the temperature of the type of compressor, environment temperature and IPM module
The overcurrent protection value of module, and it is corresponding with overcurrent protection value by the adjusting of the turn-on and turn-off of control switch pipe Q1 (such as metal-oxide-semiconductor)
Reference voltage signal.The partial pressure of divider resistance R2, R3 and R4 directly determine the size of overcurrent protection value, and switching tube Q1's opens
Logical and shutdown determines whether divider resistance R4 is short-circuited, and the turn-on and turn-off of metal-oxide-semiconductor are controlled by controller 21.Work as switch
When pipe Q1 is connected, R4 is short-circuited, and reference voltage signal is that 5V supply voltage subtracts after the conducting voltage of switching tube Q1 by R2 and R3
Partial pressure, when switching tube Q1 is disconnected, reference voltage is that 5V supply voltage is divided by R2, R3 and R4, is closed by setting
Current protection value required for suitable divider resistance value can obtain.
As shown in Fig. 2, sample circuit 10 further includes filter resistance R5 and filter capacitor C1, with sampling by filtration resistance R1 sampling
The obtained interference signal in real-time voltage signal
Wherein, one end of filter resistance R5 is connected with first node a, and the other end of filter resistance R5 is with comparator IC1's
Positive input terminal is connected.One end of filter capacitor C1 is connected with the positive input terminal of comparator IC1, another termination of filter capacitor C1
Ground.
Specifically, filter resistance R5, filter capacitor C1 form RC filter circuit, and the phase current of compressor passes through sampling resistor
R1 is converted into voltage signal, and the negative input end of comparator IC1 is then input to by RC filter circuit.
Optionally, it can also connect between the positive input terminal and negative input end of comparator IC1 with filter capacitor C3, with mistake
Filter the interference signal in real-time voltage signal and reference voltage signal.
As shown in Fig. 2, execution circuit 31 includes resistance R6, resistance R7, switching tube Q2, resistance R8, resistance R9 and capacitor C2.
Wherein, one end of resistance R6 is connected with the output end of comparator IC1, the other end of resistance R6 and one end of resistance R7
It is connected, and forms third node c, the other end of resistance R7 is connected with default power supply VCC.The control terminal and third section of switching tube Q2
Point c is connected, and the hot end of switching tube Q2 is connected with default power supply VCC.One end of resistance R8 respectively with one end of resistance R9 and
The cold end of switching tube Q2 is connected, and the other end of resistance R9 is connected with one end of overcurrent protection pin and capacitor C2 respectively, electricity
Hold the other end ground connection of C2.
In implementing at of the invention one, switching tube Q2 can be triode or metal-oxide-semiconductor, if switching tube is triode,
Its model can choose 8550 or 9014.
Specifically, comparator IC1 compares real-time voltage signal and reference voltage signal, when real-time voltage signal is greater than reference
When voltage signal, need to carry out IPM module overcurrent protection, the control signal of comparator IC1 output is high level signal, driving
Switching tube Q2 exports high level to the overcurrent protection pin of IPM module.
Optionally, adjustment circuit 20 can also include resistance R10 and resistance R11.
Wherein, resistance R10 is connected between the control terminal of switching tube Q1 and controller 31, and resistance R11 is connected to switching tube
Between the control terminal and ground of Q1, to improve the Adjustment precision of reference voltage signal.
The current foldback circuit of the adjustable IPM module of the embodiment of the present invention, by adjusting the controller in circuit according to
The overcurrent protection value of the temperature adjustment IPM module of the type of compressor, environment temperature and IPM module, and it is electric by multiple partial pressures
Resistance obtains corresponding reference voltage signal, and then by comparing the comparator in execution circuit according to reference voltage signal and in real time
Voltage signal generates corresponding control signal, and is according to control signal judgement by comparing the execution module in execution circuit
It is no that overcurrent protection is carried out to IPM module.Thereby, it is possible to give full play to heating capacity or high temperature ring under the low temperature environment of compressor
Refrigerating capacity under border.
Based on the above embodiment, the invention proposes a kind of over-current protection methods of adjustable IPM module.
Fig. 3 is the flow chart of the over-current protection method of the adjustable IPM module of one embodiment of the invention.As shown in figure 3,
Method includes the following steps:
S1 judges whether the type of compressor is ferrite compressor or rare earth compressor.
Wherein, ferrite compressor is easy demagnetization at low ambient temperatures, and rare earth compressor is easy to move back in a high temperauture environment
Magnetic.
S2 obtains the demagnetization current value and current environment of ferrite compressor if compressor is ferrite compressor
Temperature, and judge whether current environmental temperature is more than or equal to the first preset temperature.
Wherein, the value range of the first preset temperature can be 30 DEG C~40 DEG C, such as can be 35 DEG C.
It is appreciated that when environment temperature is more than or equal to the first preset temperature (such as 35 DEG C), it is believed that it is hot environment, this
When need air conditioner to run on refrigeration mode, compression mechanism cold operation.
S3 obtains the temperature of IPM module, and judge IPM if current environmental temperature is more than or equal to the first preset temperature
Whether the temperature of module is less than the second preset temperature.
S4, if the temperature of IPM module increases the overcurrent protection value of IPM module less than the second preset temperature.
Wherein, the value range of the second preset temperature can be 60 DEG C~75 DEG C, such as can be 70 DEG C.
In an embodiment of the present invention, when the temperature of IPM module is less than the second preset temperature (such as 70 DEG C), corresponding IPM
The maximum allowable output current value of module is larger, and ferrite compressor is not easy to demagnetize at this time, then can increase IPM module
Overcurrent protection value, for example, the overcurrent protection value of IPM module can be increased to 20A by 15A.
It, can be with the corresponding given rotating speed for increasing compressor, as a result, when overcurrent protection value increases in vector controlled
The power output capacity of air conditioner can be extended, refrigeration effect is improved.
S5 reduces the overcurrent protection value of IPM module if the temperature of IPM module is more than or equal to the second preset temperature.
It is appreciated that when the temperature of IPM module is more than or equal to the second preset temperature (such as 70 DEG C), corresponding IPM module
Maximum allowable output current value reduces, then needs to reduce the overcurrent protection value of IPM module, for example, can be by the overcurrent of IPM module
Protection value is decreased to 16A by 20A.
In one embodiment of the invention, if compressor is ferrite compressor, and current environmental temperature is less than the
One preset temperature then further judges whether current environmental temperature is less than or equal to third preset temperature；If current environmental temperature
Less than or equal to third preset temperature, then the demagnetization current value of ferrite compressor is set to the overcurrent protection value of IPM module.
Wherein, the value range of third preset temperature can be -10 DEG C~10 DEG C, such as can be 0 DEG C.
It is appreciated that when environment temperature is less than or equal to third preset temperature (such as 0 DEG C), it is believed that it is low temperature environment, this
When need air conditioner to run on heating mode, compressor heat operation.Since ferrite compressor is easy demagnetization at low ambient temperatures,
The demagnetization current value of ferrite compressor can be set to the overcurrent protection value of IPM module, then to guarantee that IPM module is normally transported
Row.
It in another embodiment of the present invention, can be with as shown in figure 4, the over-current protection method of adjustable IPM module
Include:
S6 obtains the demagnetization current value and current environmental temperature of rare earth compressor if compressor is rare earth compressor,
And judge whether current environmental temperature is more than or equal to the first preset temperature.
S7 obtains the temperature of IPM module, and judge IPM if current environmental temperature is more than or equal to the first preset temperature
Whether the temperature of module is less than the second preset temperature.
S8 if the temperature of IPM module increases the overcurrent protection value of IPM module less than the second preset temperature, and increases
The overcurrent protection value of IPM module afterwards is less than or equal to the demagnetization current value of rare earth compressor.
In an embodiment of the present invention, when the temperature of IPM module is less than the second preset temperature (such as 70 DEG C), corresponding IPM
The maximum allowable output current value of module is larger, can increase the overcurrent protection value of IPM module, and the IPM mould after increase at this time
The overcurrent protection value of block is less than or equal to the demagnetization current value of rare earth compressor.For example, can by the overcurrent protection value of IPM module by
15A increases to the demagnetization current value 23A of rare earth compressor.
It, can be with the corresponding given rotating speed for increasing compressor, as a result, when overcurrent protection value increases in vector controlled
The power output capacity of air conditioner can be extended, refrigeration effect is improved.
S9 reduces the overcurrent protection value of IPM module if the temperature of IPM module is more than or equal to the second preset temperature.
It is appreciated that when the temperature of IPM module is more than or equal to the second preset temperature (such as 70 DEG C), corresponding IPM module
Maximum allowable output current value reduces, then needs to reduce the overcurrent protection value of IPM module, for example, can be by the overcurrent of IPM module
Protection value is decreased to 16A by 20A, to guarantee that IPM module is not damaged by heat.
In one embodiment of the invention, if compressor is rare earth compressor, and current environmental temperature is less than first
Preset temperature then further judges whether current environmental temperature is less than or equal to third preset temperature；If current environmental temperature is small
In being equal to third preset temperature, then increase the overcurrent protection value of IPM module.
It is appreciated that when environment temperature is less than or equal to third preset temperature (such as 0 DEG C), it is believed that it is low temperature environment, this
When need air conditioner to run on heating mode, compressor heat operation.Since rare earth compressor is not easy to demagnetize at low ambient temperatures,
The overcurrent protection value of IPM module can then be increased.
Further, overcurrent protection value increase when, can with it is corresponding increase compressor given rotating speed, thus, it is possible to
The power output capacity of air conditioner is extended, heating effect is improved.
The over-current protection method of the adjustable IPM module of the embodiment of the present invention is ferrite compressor, and ring in compressor
When border temperature is lower, the demagnetization current value of ferrite compressor is directly set as to the current protection value of IPM module, environment temperature
When higher, the temperature of IPM module is further determined, if the temperature of IPM module is in the normal range, adjustable height overcurrent protection
Value, thereby, it is possible to give full play to compressor refrigerating capacity in a high temperauture environment；It is rare earth compressor, and environment in compressor
When temperature is higher, the temperature of IPM module is further determined, if the temperature of IPM module is in the normal range, overcurrent protection is turned up
Value, if the temperature of IPM module is excessively high, turns down overcurrent protection value, when environment temperature is lower, overcurrent protection value is turned up, as a result, can
Enough give full play to the heating capacity at low ambient temperatures of compressor.
Further, the invention proposes a kind of air conditioners comprising the adjustable IPM module of the above embodiment of the present invention
Current foldback circuit.
Wherein, the compressor of air conditioner can be ferrite compressor, be also possible to rare earth compressor.
The air conditioner of the embodiment of the present invention can be given full play to by the current foldback circuit of above-mentioned adjustable IPM module
The refrigerating capacity under heating capacity or hot environment under low temperature environment.
In addition, air conditioner according to an embodiment of the present invention other compositions and effect for this field ordinary skill people
Member for be all it is known, in order to reduce redundancy, be not repeated herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (12)
1. a kind of current foldback circuit of adjustable IPM module, which is characterized in that the IPM module include shunt output end and
Overcurrent protection pin, the circuit include:
Sample circuit, the sample circuit include sampling resistor R1, the sampling resistor R1 be connected to the shunting output end and
Between ground, and first node is formed with the shunting output end；
Adjustment circuit, for adjusting the IPM module according to the temperature of the type of compressor, environment temperature and the IPM module
Overcurrent protection value, and according to the overcurrent protection value adjust reference voltage signal；
Compare execution circuit, the relatively execution circuit includes comparator IC1 and execution circuit, and bearing for the comparator IC1 is defeated
Enter end to be connected with the first node, the positive input terminal of the comparator IC1 is connected with the adjustment circuit, the comparator
The output end of IC1 is connected by the execution circuit with the overcurrent protection pin, and the relatively execution circuit is used for according to next
Real-time voltage signal control letter corresponding with the reference voltage signal generation from the adjustment circuit from the sample circuit
Number, and the control signal is exported to the IPM module；
Wherein, the temperature according to the type of compressor, environment temperature and the IPM module adjusts the mistake of the IPM module
Flowing protection value includes:
Whether the type for judging compressor is ferrite compressor or rare earth compressor；
If the compressor is the ferrite compressor, the demagnetization current value of the ferrite compressor and current is obtained
Environment temperature, and judge whether the current environmental temperature is more than or equal to the first preset temperature；
If the current environmental temperature is more than or equal to first preset temperature, the temperature of the IPM module is obtained, and sentence
Whether the temperature for the IPM module of breaking is less than the second preset temperature；
If the temperature of the IPM module is less than second preset temperature, increase the overcurrent protection value of the IPM module；
If the temperature of the IPM module is more than or equal to second preset temperature, reduce the overcurrent protection of the IPM module
Value.
2. the current foldback circuit of adjustable IPM module as described in claim 1, which is characterized in that the adjustment circuit, packet
It includes:
Divider resistance R2, one end of the divider resistance R2 are connected with default power supply, the other end of the divider resistance R2 and institute
The positive input terminal for stating comparator IC1 is connected, and forms second node；
Divider resistance R3, one end of the divider resistance R3 are connected with the second node；
Divider resistance R4, one end of the divider resistance R4 respectively with the hot end of switching tube Q1 and the divider resistance R3
The other end is connected；
Switching tube Q1 and its controller, the cold end of the switching tube Q1 are connected with the other end of the divider resistance R4, and
Ground connection, the control terminal of the switching tube Q1 are connected with the controller.
3. the current foldback circuit of adjustable IPM module as described in claim 1, which is characterized in that the sample circuit, also
Include:
Filter resistance R5, one end of the filter resistance R5 are connected with the first node, the other end of the filter resistance R5
It is connected with the negative input end of the comparator IC1；
Filter capacitor C1, one end of the filter capacitor C1 are connected with the negative input end of the comparator IC1, the filter capacitor
The other end of C1 is grounded.
4. the current foldback circuit of adjustable IPM module as described in claim 1, which is characterized in that the execution circuit, packet
It includes:
Resistance R6 and resistance R7, one end of the resistance R6 are connected with the output end of the comparator IC1, and the resistance R6's is another
One end is connected with one end of the resistance R7, and forms third node, and the other end of the resistance R7 is connected with default power supply；
Switching tube Q2, the control terminal of the switching tube Q2 are connected with the third node, the hot end of the switching tube Q2 with
The default power supply is connected；
Resistance R8, resistance R9 and capacitor C2, one end of the resistance R8 respectively with one end of the resistance R9 and the switching tube
The cold end of Q2 is connected, the other end of resistance R9 one end phase with the overcurrent protection pin and the capacitor C2 respectively
Even, the other end ground connection of the capacitor C2.
5. the current foldback circuit of adjustable IPM module as claimed in claim 2, which is characterized in that the switching tube Q1 is
Metal-oxide-semiconductor, the drain electrode of the metal-oxide-semiconductor are the hot end of the switching tube Q1, and the source electrode of the metal-oxide-semiconductor is the switching tube Q1's
Cold end, the grid of the metal-oxide-semiconductor are the control terminal of the switching tube Q1.
6. the current foldback circuit of adjustable IPM module as claimed in claim 4, which is characterized in that the switching tube Q2 is
Triode or metal-oxide-semiconductor.
7. the current foldback circuit of adjustable IPM module as claimed in claim 5, which is characterized in that the adjustment circuit, also
Include:
Resistance R10 and resistance R11, the resistance R10 are connected between the control terminal and the controller of the switching tube Q1, institute
Resistance R11 is stated to be connected between the control terminal and ground of the switching tube Q1.
8. a kind of air conditioner, which is characterized in that the mistake including adjustable IPM module such as of any of claims 1-7
Stream protection circuit.
9. a kind of over-current protection method of adjustable IPM module, which comprises the following steps:
Whether the type for judging compressor is ferrite compressor or rare earth compressor；
If the compressor is the ferrite compressor, the demagnetization current value of the ferrite compressor and current is obtained
Environment temperature, and judge whether the current environmental temperature is more than or equal to the first preset temperature；
If the current environmental temperature is more than or equal to first preset temperature, the temperature of the IPM module is obtained, and sentence
Whether the temperature for the IPM module of breaking is less than the second preset temperature；
If the temperature of the IPM module is less than second preset temperature, increase the overcurrent protection value of the IPM module；
If the temperature of the IPM module is more than or equal to second preset temperature, reduce the overcurrent protection of the IPM module
Value.
10. the over-current protection method of adjustable IPM module as claimed in claim 9, which is characterized in that further include:
If the current environmental temperature is less than first preset temperature, judge whether the current environmental temperature is less than
In third preset temperature；
If the current environmental temperature is less than or equal to the third preset temperature, by the demagnetization electricity of the ferrite compressor
Flow valuve is set as the overcurrent protection value of the IPM module.
11. the over-current protection method of adjustable IPM module as claimed in claim 9, which is characterized in that further include:
If the compressor is the rare earth compressor, the demagnetization current value and current environment of the rare earth compressor are obtained
Temperature, and judge whether the current environmental temperature is more than or equal to the first preset temperature；
If the current environmental temperature is more than or equal to first preset temperature, the temperature of the IPM module is obtained, and sentence
Whether the temperature for the IPM module of breaking is less than the second preset temperature；
If the temperature of the IPM module is less than second preset temperature, increase the overcurrent protection value of the IPM module,
And the overcurrent protection value of the IPM module after increasing is less than or equal to the demagnetization current value of the rare earth compressor；
If the temperature of the IPM module is more than or equal to second preset temperature, reduce the overcurrent protection of the IPM module
Value.
12. the over-current protection method of adjustable IPM module as claimed in claim 11, which is characterized in that further include:
If the current environmental temperature is less than first preset temperature, judge whether the current environmental temperature is less than
In third preset temperature；
If the current environmental temperature is less than or equal to the third preset temperature, increase the overcurrent protection of the IPM module
Value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710010246.0A CN106711978B (en) | 2017-01-06 | 2017-01-06 | Current foldback circuit, method and the air conditioner of adjustable IPM module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710010246.0A CN106711978B (en) | 2017-01-06 | 2017-01-06 | Current foldback circuit, method and the air conditioner of adjustable IPM module |
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| CN106711978B true CN106711978B (en) | 2019-07-30 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336718B (en) * | 2018-01-03 | 2019-09-27 | 广东美芝制冷设备有限公司 | Compressor current foldback circuit, compressor and air conditioner |
| CN110190587B (en) * | 2019-06-21 | 2021-10-26 | 广东美的制冷设备有限公司 | Overcurrent protection method, overcurrent protection circuit, intelligent power module and air conditioner |
| CN111412633B (en) * | 2020-03-06 | 2021-06-22 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
| CN111525518A (en) * | 2020-05-09 | 2020-08-11 | 青岛海信日立空调系统有限公司 | Air conditioner |
| CN112578773B (en) * | 2020-12-30 | 2022-04-12 | 南京康尼电子科技有限公司 | IPM fault detection and protection device and method for rail vehicle door control |
| CN113983664A (en) * | 2021-10-29 | 2022-01-28 | 北京小米移动软件有限公司 | Air conditioner, control method thereof, and computer-readable storage medium |
| CN114039480B (en) * | 2021-11-06 | 2023-10-27 | 珠海格力电器股份有限公司 | Over-current protection method, device and circuit for frequency converter |
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