CN106505932A - The typhoon power protecting circuit of outdoor fan, off-premises station and air-conditioner in air-conditioner - Google Patents
The typhoon power protecting circuit of outdoor fan, off-premises station and air-conditioner in air-conditioner Download PDFInfo
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- CN106505932A CN106505932A CN201611050992.4A CN201611050992A CN106505932A CN 106505932 A CN106505932 A CN 106505932A CN 201611050992 A CN201611050992 A CN 201611050992A CN 106505932 A CN106505932 A CN 106505932A
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- 238000004378 air conditioning Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 44
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 22
- 229910052802 copper Inorganic materials 0.000 description 22
- 239000010949 copper Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 230000005347 demagnetization Effects 0.000 description 8
- 230000001172 regenerating effect Effects 0.000 description 7
- 230000007812 deficiency Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
- H02P27/085—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses in a kind of air-conditioner outdoor fan typhoon power protecting circuit, the circuit includes：Converter, which includes three-phase inversion unit and control unit, and, in order to connect high-voltage DC power supply, the three-phase output end of three-phase inversion unit is in order to connecting the motor in outdoor fan for first DC terminal and the second DC terminal of three-phase inversion unit；Single-phase gate-controlled switch, its first end are connected between any one phase output terminal and the motor in three-phase output end, and its second end is connected with the first DC terminal, its control end is connected with control unit, wherein, when air-conditioner startup work, control unit controls single-phase gate-controlled switch and is off；When air-conditioner is shut down, control unit controls single-phase gate-controlled switch and is in closure state, such that it is able to protect the converter of air-conditioning without damage when typhoon is run into, and reduces the rotating speed of the wind-induced outdoor fan of platform, it is to avoid the wind-induced secondary problem of platform.The invention also discloses a kind of off-premises station and air-conditioner.
Description
Technical field
The present invention relates to air-conditioner technical field, the typhoon power protection electricity of outdoor fan in more particularly to a kind of air-conditioner
Road, a kind of off-premises station and a kind of air-conditioner.
Background technology
Air-conditioner in correlation technique is operated by transducer drive outdoor fan.In the related, in air-conditioner
If outdoor fan runs into exogenous wind (typhoon or violent typhoon), the blower fan under stopped status can also be rotated.If
Exogenous wind wind speed is larger, then the rotating speed of motor is higher, and motor itself produces larger induced voltage, the regeneration electricity that induced voltage causes
Pressure if it exceeds the pressure voltage of electronic device (such as electric capacity) in converter, then can cause electronic device to damage, cause damage,
Consumer's Experience is poor.
In addition, if exogenous wind wind speed is excessive, can also cause much secondary problems, for example, outdoor fan wind wheel intensity is not enough
The fan blade for causing damages the startup demagnetization problem of the motor that problem, the bearing life problem of outdoor fan, overcurrent cause, electric power
Overvoltage problem of regeneration etc., reduces the reliability of product.
Content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.For this purpose, the present invention
One purpose is that the typhoon power protecting circuit for proposing outdoor fan in a kind of air-conditioner, the protection circuit can solve typhoon
The problem that the electronic device for causing is damaged, while the wind-induced secondary problem of platform can be avoided.
Further object is that proposing a kind of off-premises station.A further object of the present invention is to propose a kind of sky
Adjust device.
For reaching above-mentioned purpose, one aspect of the present invention embodiment proposes a kind of typhoon power supply of outdoor fan in air-conditioner
Protection circuit, including：Converter, the converter include three-phase inversion unit and control unit, the three-phase inversion unit
, in order to connect high-voltage DC power supply, the three-phase output end of the three-phase inversion unit is in order to even for first DC terminal and the second DC terminal
Connect the motor in the outdoor fan；Single-phase gate-controlled switch, it is defeated that the first end of the single-phase gate-controlled switch is connected to the three-phase
Between any one phase output terminal gone out in end and the motor, the second end of the single-phase gate-controlled switch and first DC terminal
It is connected, the control end of the single-phase gate-controlled switch is connected with described control unit, wherein, when the air-conditioner startup work,
Described control unit controls the single-phase gate-controlled switch and is off；When the air-conditioner is shut down, described control unit
The single-phase gate-controlled switch is controlled in closure state.
The typhoon power protecting circuit of outdoor fan in the air-conditioner for proposing according to embodiments of the present invention, by control unit
Control single-phase gate-controlled switch to be opened or closed, when air-conditioner startup work, control unit controls single-phase gate-controlled switch and disconnects, with
The three-phase output end of three-phase inversion unit is made to be connected with the motor in outdoor fan, when air-conditioner quits work, control unit
Unidirectional gate-controlled switch closure is controlled, so that any one phase output terminal of three-phase inversion unit is connected with the first DC terminal.Thus may be used
Know, protection circuit according to embodiments of the present invention reduces turning for outdoor fan when typhoon is met with using the braking moment of motor
Speed, to reduce the regenerative voltage of the converter that the induced voltage of motor causes, it is to avoid the wind-induced electronic device of platform is damaged, and is reduced
Economic loss, improves Consumer's Experience.And it is possible to the fan blade for avoiding wind wheel intensity deficiency from causing is damaged, it is to avoid typhoon causes
Bearing impact, it is to avoid the motor that overcurrent causes startup demagnetization problem, improve the reliability of product.
According to one embodiment of present invention, the single-phase gate-controlled switch can be relay.
According to one embodiment of present invention, the three-phase inversion unit includes the first to the 6th switching tube, first switch
Pipe and second switch pipe constitute the first bridge arm, the 3rd switching tube and the 4th switching tube the second bridge arm of composition, the 5th switching tube and the
Six switching tubes constitute the 3rd bridge arm, and first bridge arm has primary nodal point, and second bridge arm has secondary nodal point, and described the
There is three bridge arms the 3rd node, the primary nodal point, the secondary nodal point and the 3rd contact to constitute the three-phase output end.
According to a specific embodiment of the present invention, the described first to the 6th switching tube can be IGBT or MOSFET.
According to one embodiment of present invention, on the IGBT or MOSFET, reverse parallel connection has diode, wherein, when described
When the first end of single-phase gate-controlled switch is connected between the first phase output terminal in the three-phase output end and the motor, if
The single-phase gate-controlled switch is in closure state, the two of reverse parallel connection on the upper pipe in second bridge arm and the 3rd bridge arm
Pole pipe is mutually exported with first as the second phase output terminal in commutation diode, and the three-phase output end, third phase outfan
Loop is constituted between end.
For reaching above-mentioned purpose, a kind of off-premises station that another aspect of the present invention embodiment is proposed, including the embodiment
The typhoon power protecting circuit of outdoor fan in air-conditioner.
The off-premises station for proposing according to embodiments of the present invention, by the typhoon power protection electricity of outdoor fan in above-mentioned air-conditioner
Road, the braking moment when typhoon is met with using motor reduce the rotating speed of outdoor fan, so as to reduce the rotating speed of outdoor fan, with
The regenerative voltage of the converter that the induced voltage of reduction motor causes, it is to avoid the wind-induced electronic device of platform is damaged, is reduced economical
Loss, improves Consumer's Experience.And it is possible to the fan blade for avoiding wind wheel intensity deficiency from causing is damaged, it is to avoid the wind-induced axle of platform
Hold impact, it is to avoid the startup demagnetization problem of the motor that overcurrent causes, improve the reliability of product.
For reaching above-mentioned purpose, a kind of air-conditioner that another aspect of the invention embodiment is proposed, including the embodiment
Off-premises station.
The air-conditioner for proposing according to embodiments of the present invention, by above-mentioned off-premises station, when typhoon is met with using motor system
Dynamic torque reduces the rotating speed of outdoor fan, to reduce the regenerative voltage of the converter that the induced voltage of motor causes, it is to avoid typhoon
The electronic device for causing is damaged, and is reduced economic loss, is improved Consumer's Experience.And it is possible to avoid wind wheel intensity deficiency from causing
Fan blade damage, it is to avoid the wind-induced bearing impact of platform, it is to avoid the motor that overcurrent causes startup demagnetization problem, improve product
The reliability of product.
Description of the drawings
Fig. 1 is that the square frame of the typhoon power protecting circuit of outdoor fan in air-conditioner according to embodiments of the present invention is illustrated
Figure；
Fig. 2 is that the circuit of the typhoon power protecting circuit of outdoor fan in air-conditioner according to an embodiment of the invention is former
Reason figure；
Fig. 3 is the electricity of the typhoon power protecting circuit of outdoor fan in air-conditioner according to a specific embodiment of the invention
Road schematic diagram；
Fig. 4 is the typhoon power protecting circuit of outdoor fan in air-conditioner according to another specific embodiment of the invention
Circuit theory diagrams；
Fig. 5 is that the waveform of the typhoon power protecting circuit of outdoor fan in air-conditioner according to an embodiment of the invention shows
It is intended to；
Fig. 6 is the waveform of the typhoon power protecting circuit of outdoor fan in air-conditioner in accordance with another embodiment of the present invention
Schematic diagram；
Fig. 7 is the copper of the typhoon power protecting circuit of outdoor fan in air-conditioner according to a specific embodiment of the invention
The waveform diagram of damage；
Fig. 8 is the ripple of the typhoon power protecting circuit of outdoor fan in air-conditioner according to a specific embodiment of the invention
Shape schematic diagram；
Fig. 9 is the block diagram of off-premises station according to embodiments of the present invention；And
Figure 10 is the block diagram of air-conditioner according to embodiments of the present invention.
Reference：
Converter 10, single-phase gate-controlled switch 20, high-voltage DC power supply 30 and motor 40；
Three-phase inversion unit 101 and control unit 102；
The first switch pipe switching tube Q6 of Q1 to the 6th and the first diode D6 of diode D1 to the 6th.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below with reference to the accompanying drawings electric to describe the typhoon power protection of outdoor fan in the air-conditioner that the embodiment of the present invention is proposed
Road, off-premises station and air-conditioner.
Fig. 1 is that the square frame of the typhoon power protecting circuit of outdoor fan in air-conditioner according to embodiments of the present invention is illustrated
Figure.As shown in figure 1, the typhoon power protecting circuit of the outdoor fan includes：Converter 10 and single-phase gate-controlled switch 20.
Wherein, converter 10 includes three-phase inversion unit 101 and control unit 102, and the first of three-phase inversion unit 101 is straight
Stream end+and the second DC terminal-in order to connect high-voltage DC power supply 30, the three-phase output end of three-phase inversion unit 101 is in order to connecting
Motor 40 in outdoor fan；The first end of single-phase gate-controlled switch 20 be connected to any one phase output terminal in three-phase output end with
Between motor 40, the second end of single-phase gate-controlled switch 20 and the first DC terminal+be connected, the control end of single-phase gate-controlled switch 20 and control
Unit processed 102 is connected, and wherein, when air-conditioner startup work, control unit 102 controls single-phase gate-controlled switch 20 in disconnection shape
State；When air-conditioner is shut down, control unit 102 controls single-phase gate-controlled switch 20 in closure state.
Specifically, when air-conditioner startup work, control unit 102 controls single-phase gate-controlled switch 20 in disconnection shape
State, the three-phase output end of three-phase inversion unit 101 are connected with motor 40, and three-phase inversion unit 101 is carried to high-voltage DC power supply 30
For unidirectional current carry out inversion and process exporting three-phase alternating current, and the three-phase alternating current after inversion is processed is supplied to motor
40, think that motor 40 is powered；When air-conditioner quits work, control unit 102 controls single-phase gate-controlled switch 20 in closed form
State so that the first DC terminal+with the direct phase of any one phase winding (such as U phase windings, V phase windings or W phase windings) of motor 40
Even, the winding of motor 40, three-phase inversion unit 101 and single-phase gate-controlled switch 20 constitute conducting loop.When typhoon is met with, outdoor
The rotor rotation of the wind wheel drive motor 40 of blower fan, the rotor cutting magnetic field line of motor 40 produce induced voltage E, and in motor 40
Winding on produce faradic current Im, according to left hand rule, when motor 40 is rotated, on the winding of motor 40 formation braking moment
To hinder motor 40 to rotate, now, motor 40 operates in generating state, and motor 40 rotates the value of acting and the copper inside motor 40
Damage equal.
So, in the presence of exogenous wind and internal detent torque, motor 40 produces relatively low induced voltage, and motor 40
Rotating speed Ns is persistently limited by braking moment, and motor 40 is slowly rotated with relatively low rotating speed Ns, without stopping completely.
Thus, the protection circuit according to embodiments of the present invention motor when typhoon is met with is acted on by braking moment, so as to
Reduce the rotating speed of outdoor fan, to reduce the regenerative voltage of the converter that the induced voltage of motor causes, it is to avoid platform is wind-induced
Electronic device is damaged, and is reduced economic loss, is improved Consumer's Experience.And it is possible to avoid the wind wheel that wind wheel intensity deficiency is caused
Blade damage, it is to avoid the wind-induced bearing impact of platform, it is to avoid the startup demagnetization problem of the motor that overcurrent causes, improves product
Reliability.
According to a specific embodiment of the present invention, single-phase gate-controlled switch 20 can be relay.Wherein, the relay can be
1 pole, 1 contact relay.That is, when control unit 102 controls single-phase gate-controlled switch 20 in closure state, motor 40
There is a pole relay short circuit.
According to one embodiment of present invention, as shown in Fig. 2 three-phase inversion unit 101 includes first switch pipe Q1 to
Six switching tube Q6, first switch pipe Q1 and second switch pipe Q2 constitute the first bridge arm, the 3rd switching tube Q3 and the 4th switching tube Q4
The second bridge arm is constituted, the 5th switching tube Q5 and the 6th switching tube Q6 constitutes the 3rd bridge arm, and the first bridge arm has primary nodal point, second
Bridge arm has secondary nodal point, and there is the 3rd bridge arm the 3rd node, primary nodal point, secondary nodal point and the 3rd contact to constitute three-phase output
End.
According to the present invention a specific embodiment, first switch pipe Q1 to the 6th switching tube Q6 can be IGBT manage or
MOSFET is managed.
Specifically, in air-conditioner startup work, control unit 102 controls single-phase gate-controlled switch 20 in disconnection shape
State, the driver element of converter 10 drive the first switch pipe switching tube Q6 of Q1 to the 6th to turn on and off according to default rule, with
Inversion process is carried out to the unidirectional current that high-voltage DC power supply 30 is provided, and the three-phase alternating current after inversion is processed is defeated by three-phase
Go out to hold A, B, C to be supplied to motor 40, think that motor 40 is powered, wherein, A phase output terminals are connected with the U phase windings of motor 40, B phases
Outfan is connected with the V phase windings of motor 40, and C phase output terminals are connected with the W phase windings of motor 40.Quit work in air-conditioner
When, the first switch pipe switching tube Q6 of Q1 to the 6th are turned off, and control unit 102 controls single-phase gate-controlled switch 20 in closure state,
So that the first DC terminal+be connected with any one phase output terminal in the three-phase output end of three-phase inversion unit 101, that is to say, that
There is a pole relay short circuit in motor 40, the first direct current section+with any one phase winding of motor 40 (U phase windings, V phase windings or
Person's W phase windings) it is connected.
According to one embodiment of present invention, as shown in Fig. 2 reverse parallel connection has diode on IGBT pipes or MOSFET pipes,
Wherein, when between the first phase output terminal A and motor 40 that the first end of single-phase gate-controlled switch 20 is connected in three-phase output end,
If single-phase gate-controlled switch 20 is in closure state, upper pipe in the second bridge arm and the 3rd bridge arm (i.e. the 3rd switching tube Q3 and the
Five switching tube Q5) upper reverse parallel connection diode as commutation diode, and three-phase output end in the second phase output terminal B, the
Loop is constituted between three-phase output end C and the first phase output terminal.
Specifically, on first switch pipe Q1, reverse parallel connection has the first diode D1, reverse parallel connection on second switch pipe Q2
There is the second diode D2, reverse parallel connection has the 3rd diode D3 on the 3rd switching tube Q3, on the 4th switching tube Q4 there be reverse parallel connection
4th diode D4, on the 5th switching tube Q5, reverse parallel connection has the 5th diode D5, and on the 6th switching tube Q6, reverse parallel connection has
Six diode D6.When the first end of single-phase gate-controlled switch 20 is connected to the first phase output terminal A in three-phase output end and motor 40
Between when, if single-phase gate-controlled switch 20 be in closure state, the first switch pipe Q1 and the first diode in the first bridge arm
D1 is shorted, now, the equivalent circuit that is obtained shown in Fig. 3.
As shown in figure 3, when meet with typhoon when, the wind wheel drive motor 40 of outdoor fan rotor rotation, motor 40 turn
Sub- cutting magnetic field line produces induced voltage E, and on the winding of motor 40 produces faradic current, when the faradic current that V phases flow through
When Iv is positive direction, faradic current Iv is flowed out through the 3rd diode D3, then flows into U phase windings through single-phase gate-controlled switch 20；
When the faradic current Iw that W phases flow through is positive direction, faradic current Iw is flowed out through the 5th diode D5, then through single-phase controllable
Switch 20 flows into U phase windings, constitutes conducting loop.Therefore, faradic current Iv of the faradic current for flowing through in U phase windings for V phases
With the sum of the faradic current Iw of W phases, and faradic direction be negative direction.
The induced voltage of motor 40 when meeting with typhoon with reference to Fig. 4-6 pair, 40 inside copper loss of faradic current and motor
Waveform is analyzed.
According to one embodiment of present invention, it is assumed that the first end of single-phase gate-controlled switch 20 is connected in three-phase output end
Third phase outfan C and motor 40 between, if single-phase gate-controlled switch 20 be in closure state, the 5th in the 3rd bridge arm
Switching tube Q5 and the 5th diode D5 are shorted, now, the equivalent circuit that is obtained shown in Fig. 4.When typhoon is met with, U is flow through
The faradic current Iu of phase winding and the faradic current Iv for flowing through V phase windings are positive direction, flow through the faradic current Iw's of W phase windings
Direction is negative direction, and Iw be Iu with Iv's and, wherein, the waveform of faradic current Iu, Iv and Iw can be as shown in Figure 5.
Specifically, it is analyzed on the basis of W phase windings, the waveform being obtained shown in Fig. 5.
As shown in figure 5, in a cycle, at the t1 moment, U phase windings begin to flow through the faradic current Iu of positive direction, this
When, the induced voltage of U phase windings is higher than the induced voltage of W phase windings, and the voltage Euw between U phase windings and W phase windings is more than zero
And gradually increase.
Voltage Evw between t2 moment, V phase windings and W phase windings is higher thanNow, V phase windings just begin to flow through
The faradic current Iv in direction, afterwards, faradic current Iv gradually increases, and faradic current Iu is gradually reduced.
Voltage Euw between t3 moment, U phase windings and W phase windings is less thanNow, the faradic current of U phase windings
Iu vanishing, the faradic current Iv of V phase windings are gradually decreased.
Voltage Evw between t4 moment, V phase windings and W phase windings is that faradic current Iu and Iv in zero, and loop are equal
It is zero, therefore, the faradic current Iw for flowing through W phase windings is zero.
Further, in conjunction with constant of the machine, copper loss Pu, Pv of each phase winding and Pw inside motor 40, wherein, copper can be calculated
Damage Pu, Pv and Pw and 40 inside copper loss of motor and P3 ＇ waveform as shown in Figure 6.
If it follows that controlled motor 40 occurs a pole relay short circuit when air-conditioner is shut down, when exogenous wind is acted on
When wind wheel blade, the induced voltage of motor 40, the waveform complexity of 40 inside copper loss of faradic current and motor, accordingly, it is difficult to enter
Row short action is analyzed.
It should be noted that when air-conditioner is shut down, motor 40 occur three-phase shortcircuit, any line to line fault or a pole after
Electrical short-circuit, it is equal with the copper loss inside motor 40 that motor 40 rotates working power.Therefore, there is a pole relay in motor 40
During device short circuit, it is possible to use the ratio of copper loss when three-phase shortcircuit, any line to line fault and a pole relay short circuit inside motor 40
Example relation, when short-circuit to a pole relay, the rotating speed Ns of the motor 40 that exogenous wind wind speed v causes and faradic meansigma methodss Im are entered
Row is calculated.
According to one embodiment of present invention, if when air-conditioner is shut down controlled motor 40 three-phase windings short circuit,
Copper loss P1 ＇=3 × R × Im inside motor 402=3 × 1.2 × 2.332=19.5W, wherein, R is the resistance value of single-phase winding,
Faradic meansigma methodss when Im is three-phase shortcircuit.
According to another embodiment of the invention, if any two phase winding of controlled motor 40 is short when air-conditioner is shut down
Connect, then the copper loss inside motor 40During line to line fault inside motor 40
Copper loss P2 ＇ be three-phase shortcircuit when motor 40 inside copper loss P1 ＇ half.
With reference to Fig. 7 and 8, operation principle when there is a pole relay short circuit to motor 40 is made a concrete analysis of and is tested
Card.
As shown in fig. 7, being analyzed to the copper loss inside motor 40 so that the rotating speed Ns of motor 40 is as 1rpm as an example.If electric
The three-phase windings short circuit of machine 40, then the meansigma methodss of the copper loss P1 ＇ inside motor 40 are 8.167mW；If any the two of motor 40
Phase winding short circuit, then the meansigma methodss of the copper loss P2 ＇ inside motor 40 are 4.08366mW；If there is a pole relay in motor 40
Short circuit, then the meansigma methodss of the copper loss P3 ＇ inside motor 40 are 3.4032mW.Wherein, three-phase shortcircuit, any line to line fault and a pole
The ratio of copper loss during relay short circuit inside motor 40 is 100%：50%：41.668%.
It should be noted that aforementioned proportion relation is equally applicable to produce when motor 40 rotates under exogenous wind effect
Internal copper loss.
It should be noted that, the maximum of revolution Ns of the motor 40 under exogenous wind effect is 172rpm, if rotating speed Ns is super
172rpm is crossed, then the brake weight of motor 40 can be caused to reduce.
According to a specific embodiment of the present invention, as shown in figure 8, when the rotating speed Ns of motor reaches 172rpm, three-phase
Exogenous wind wind speed v when short-circuit is 53.1m/s, and exogenous wind wind speed v during any line to line fault is 37.5m/s, during 1 pole relay short circuit
Exogenous wind wind speed v be 34.3m/s, that is to say, that when the rotating speed Ns of motor 40 is identical, three-phase shortcircuit, any line to line fault and
Exogenous wind wind speed v during one pole relay short circuit is 100%：70.71%：64.55%.
The ratio of above-mentioned exogenous wind wind speed v square be 100%：50%：41.668%, with three-phase shortcircuit, arbitrarily biphase short
Copper loss when road and pole relay short circuit inside motor 40 is in equal proportions.
As shown in figure 8, copper loss when three-phase shortcircuit, any line to line fault and a pole relay short circuit inside motor 40 is most
It is 120W, 60W, 50W that big value is respectively, and its ratio is 100%：50%：41.668%.
In addition, when motor 40 occurs a pole relay short circuit, as the faradic current of 40 each phase winding of motor is differed,
Therefore, faradic meansigma methodss can be calculated respectively.As shown in Figure 10, when the rotating speed Ns of motor reaches 172rpm, three-phase is short
When road, any line to line fault and pole relay short circuit the faradic meansigma methodss of motor 40 be respectively 5.795A, 4.098A,
3.741A, its ratio are 100%：70.71%：64.55%, identical with the ratio of exogenous wind wind speed v.
As described above, under exogenous wind effect, when the rotating speed Ns of motor 40 is identical, copper during three-phase shortcircuit inside motor 40
Maximum, braking moment maximum is damaged, the exogenous wind wind speed v maximums that outdoor fan can bear, line to line fault are taken second place, and a pole relay is short
Road is worst.
To sum up, the typhoon power protecting circuit of outdoor fan in the air-conditioner for proposing according to embodiments of the present invention, by control
Unit processed controls single-phase gate-controlled switch and is opened or closed, and when air-conditioner startup work, control unit controls single-phase gate-controlled switch
Disconnect, so that the three-phase output end of three-phase inversion unit is connected with the motor in outdoor fan, when air-conditioner quits work, control
Unit processed controls unidirectional gate-controlled switch closure, so that any one phase output terminal of three-phase inversion unit is connected with the first DC terminal.
It follows that protection circuit according to embodiments of the present invention shuts down by single-phase gate-controlled switch by three-phase inversion list in air-conditioner
Any one mutually short circuit of unit, such that it is able to utilize the braking moment of motor to reduce the rotating speed of outdoor fan, to reduce the sense of motor
The regenerative voltage of the converter for answering voltage to cause, it is to avoid the wind-induced electronic device of platform is damaged, and is reduced economic loss, is improved use
Experience at family.And it is possible to the fan blade for avoiding wind wheel intensity deficiency from causing is damaged, it is to avoid the wind-induced bearing impact of platform, it is to avoid mistake
The startup demagnetization problem of the motor that electric current causes, improves the reliability of product.
Fig. 9 is the block diagram of off-premises station according to embodiments of the present invention.As shown in figure 9, the off-premises station 200 includes sky
Adjust the typhoon power protecting circuit 100 of outdoor fan in device.
To sum up, the off-premises station for proposing according to embodiments of the present invention, by the typhoon power supply of outdoor fan in above-mentioned air-conditioner
Protection circuit, the braking moment when typhoon is met with using motor reduce the rotating speed of outdoor fan, to reduce the faradism of motor
The regenerative voltage of the converter that pressure causes, it is to avoid the wind-induced electronic device of platform is damaged, and is reduced economic loss, is improved user's body
Test.And it is possible to the fan blade for avoiding wind wheel intensity deficiency from causing is damaged, it is to avoid the wind-induced bearing impact of platform, it is to avoid overcurrent
The startup demagnetization problem of the motor for causing, improves the reliability of product.
Figure 10 is the block diagram of air-conditioner according to embodiments of the present invention.As shown in Figure 10, the air-conditioner 300 includes
Off-premises station 200.
To sum up, the air-conditioner for proposing according to embodiments of the present invention, by above-mentioned off-premises station, when typhoon is met with using motor
Braking moment reduce outdoor fan rotating speed, to reduce the regenerative voltage of the converter that the induced voltage of motor causes, it is to avoid
The wind-induced electronic device of platform is damaged, and is reduced economic loss, is improved Consumer's Experience.And it is possible to avoid wind wheel intensity not enough
The fan blade for causing is damaged, it is to avoid the wind-induced bearing impact of platform, it is to avoid the startup demagnetization problem of the motor that overcurrent causes, and is improved
The reliability of product.
In describing the invention, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time
The orientation of instruction such as pin ", " counterclockwise ", " axial direction ", " radially ", " circumference " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of description description of the invention and simplified, rather than indicates or imply that the device or element of indication must
Therefore must be not considered as limiting the invention with specific orientation, with specific azimuth configuration and operation.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integral；Can be that machinery connects
Connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clearly restriction.For one of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be with
It is the first and second feature directly contacts, or the first and second features is by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
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 the spy described with reference to the embodiment or example
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office
Combined in one or more embodiments or example in an appropriate manner.Additionally, in the case of not conflicting, the skill of this area
The feature of the different embodiments or example described in this specification and different embodiments or example can be tied by art personnel
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (7)
1. in a kind of air-conditioner outdoor fan typhoon power protecting circuit, it is characterised in that include：
Converter, the converter include three-phase inversion unit and control unit, the first DC terminal of the three-phase inversion unit
With the second DC terminal in order to connect high-voltage DC power supply, the three-phase output end of the three-phase inversion unit is in order to connecting the outdoor
Motor in blower fan；
Single-phase gate-controlled switch, what the first end of the single-phase gate-controlled switch was connected in the three-phase output end any one are mutually exported
Between end and the motor, the second end of the single-phase gate-controlled switch is connected with first DC terminal, described single-phase controllable is opened
The control end of pass is connected with described control unit, wherein,
When the air-conditioner startup work, described control unit controls the single-phase gate-controlled switch and is off；
When the air-conditioner is shut down, described control unit controls the single-phase gate-controlled switch and is in closure state.
2. in air-conditioner according to claim 1 outdoor fan typhoon power protecting circuit, it is characterised in that the list
Phase gate-controlled switch is relay.
3. in air-conditioner according to claim 1 and 2 outdoor fan typhoon power protecting circuit, it is characterised in that institute
Stating three-phase inversion unit includes that the first to the 6th switching tube, first switch pipe constitute the first bridge arm with second switch pipe, and the 3rd opens
Close tetra- switching tubes of Guan Yu and constitute the second bridge arm, the 5th switching tube and the 6th switching tube constitute the 3rd bridge arm, first bridge arm
There is primary nodal point, second bridge arm has secondary nodal point, the 3rd bridge arm has the 3rd node, the primary nodal point,
The secondary nodal point and the 3rd contact constitute the three-phase output end.
4. in air-conditioner according to claim 3 outdoor fan typhoon power protecting circuit, it is characterised in that described
One to the 6th switching tube is IGBT or MOSFET.
5. in air-conditioner according to claim 4 outdoor fan typhoon power protecting circuit, it is characterised in that described
On IGBT or MOSFET, reverse parallel connection has diode, wherein, when the first end of the single-phase gate-controlled switch is connected to the three-phase
When between the first phase output terminal and the motor in outfan, if the single-phase gate-controlled switch is in closure state, described
On upper pipe in second bridge arm and the 3rd bridge arm, the diode of reverse parallel connection is used as commutation diode, and three-phase output
The second phase output terminal in end, between third phase outfan and the first phase output terminal constitute loop.
6. a kind of off-premises station, it is characterised in that include outdoor fan in the air-conditioner according to any one of claim 1-5
Typhoon power protecting circuit.
7. a kind of air-conditioner, it is characterised in that including off-premises station according to claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611050992.4A CN106505932A (en) | 2016-11-22 | 2016-11-22 | The typhoon power protecting circuit of outdoor fan, off-premises station and air-conditioner in air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611050992.4A CN106505932A (en) | 2016-11-22 | 2016-11-22 | The typhoon power protecting circuit of outdoor fan, off-premises station and air-conditioner in air-conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106505932A true CN106505932A (en) | 2017-03-15 |
Family
ID=58328088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611050992.4A Pending CN106505932A (en) | 2016-11-22 | 2016-11-22 | The typhoon power protecting circuit of outdoor fan, off-premises station and air-conditioner in air-conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106505932A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323426A (en) * | 2018-11-09 | 2019-02-12 | 青岛海尔空调器有限总公司 | Air conditioner control method and air conditioner |
| CN112344515A (en) * | 2019-08-09 | 2021-02-09 | 日立江森自控空调有限公司 | refrigeration cycle system |
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| JPH0690578A (en) * | 1992-09-08 | 1994-03-29 | Matsushita Electric Ind Co Ltd | Motor driving device |
| US20110199030A1 (en) * | 2010-02-15 | 2011-08-18 | Denso Corporation | Motor control apparatus and electric power steering system using the same |
| CN202171292U (en) * | 2011-08-05 | 2012-03-21 | Tcl空调器(中山)有限公司 | Protective device for outdoor unit and outdoor unit |
| CN202524079U (en) * | 2012-04-09 | 2012-11-07 | 广东美的电器股份有限公司 | Strong-wind resistant protective circuit for air conditioner outdoor unit |
| CN103296942A (en) * | 2012-02-28 | 2013-09-11 | 发那科株式会社 | Motor drive apparatus equipped with dynamic braking control unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0690578A (en) * | 1992-09-08 | 1994-03-29 | Matsushita Electric Ind Co Ltd | Motor driving device |
| US20110199030A1 (en) * | 2010-02-15 | 2011-08-18 | Denso Corporation | Motor control apparatus and electric power steering system using the same |
| CN202171292U (en) * | 2011-08-05 | 2012-03-21 | Tcl空调器(中山)有限公司 | Protective device for outdoor unit and outdoor unit |
| CN103296942A (en) * | 2012-02-28 | 2013-09-11 | 发那科株式会社 | Motor drive apparatus equipped with dynamic braking control unit |
| CN202524079U (en) * | 2012-04-09 | 2012-11-07 | 广东美的电器股份有限公司 | Strong-wind resistant protective circuit for air conditioner outdoor unit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323426A (en) * | 2018-11-09 | 2019-02-12 | 青岛海尔空调器有限总公司 | Air conditioner control method and air conditioner |
| CN109323426B (en) * | 2018-11-09 | 2020-12-25 | 青岛海尔空调器有限总公司 | Control method of air conditioner and air conditioner |
| CN112344515A (en) * | 2019-08-09 | 2021-02-09 | 日立江森自控空调有限公司 | refrigeration cycle system |
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