CN106849015A - A kind of compressor protective circuit and air-conditioner - Google Patents
A kind of compressor protective circuit and air-conditioner Download PDFInfo
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- CN106849015A CN106849015A CN201710092163.0A CN201710092163A CN106849015A CN 106849015 A CN106849015 A CN 106849015A CN 201710092163 A CN201710092163 A CN 201710092163A CN 106849015 A CN106849015 A CN 106849015A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/09—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
Abstract
The present invention provides a kind of compressor protective circuit and air-conditioner; by increasing feedback module and unlocked state in current sample module, voltage comparison module, MCU and SPM with compressor protective circuit; the input and output side of voltage comparison module is connected to due to feedback module; unlocked state is connected to the input of voltage comparison module; therefore circuit structure can be made relatively easy; single latch cicuit the need in compared with the prior art; resolution circuitry provided in an embodiment of the present invention is simple, can reduces cost.
Description
Technical field
The present invention relates to compressor protective circuit field, more particularly to a kind of compressor protective circuit and air-conditioner.
Background technology
At present, the drive scheme of the outdoor compressor of convertible frequency air-conditioner after AC power rectifying and wave-filtering typically by obtaining
Dc bus power supply, the dc bus power supply after circuit of power factor correction carries out Active PFC treatment, then to intelligence
Energy power model is powered, and finally directly drives compressor operating by SPM, meanwhile, the MCU outputs in convertible frequency air-conditioner
Drive signal is so that SPM drives compressor operating according to corresponding phase current.
In order to carry out overcurrent protection to compressor, prior art can provide a kind of compressor current protection circuit, and it passes through
Phase current to compressor is sampled, and the switch of SPM is controlled according to sampled voltage, can be in compressor
SPM is set to turn off the output of its phase current to reach the purpose of protection compressor when phase current is excessive, while in order to tackle
The problem of effectively protection cannot be realized to compressor due to interference signal during compressor carries out overcurrent protection shut-off compressor,
Prior art provides a kind of compressor current foldback circuit with latching, and it is in compressor current foldback circuit output to intelligence
Increase latch cicuit between power model, the main latch being similar to by such as d type flip flop realizes latch function, can be to excessively stream
Protection signal is effectively latched, and just many overcurrent protection signals are released by latch after over current fault is excluded completely, with
So that MCU can control compressor normal work with output drive signal to SPM, due to needing to increase individually lock
Circuit is deposited, it is relative complex to there is circuit in actual application, high expensive problem.
The content of the invention
It is a primary object of the present invention to provide a kind of compressor protective circuit and air-conditioner, it is therefore intended that solve compressor
There are problems that circuit complexity high expensive when increasing latch cicuit in current foldback circuit.
To achieve the above object, a kind of compressor protective circuit that the present invention is provided, the compressor protective circuit includes
Current sample module, voltage comparison module, MCU and SPM；The SPM is exported according to the MCU
Drive signal output current phase driving compressor operating；The current sample module is sampled to the phase current of compressor
And export corresponding sampled voltage signal to the voltage comparison module；The voltage comparison module is by the sampled voltage signal
It is compared with reference voltage signal, when the sampled voltage signal is more than the reference voltage signal, output protection signal
To the SPM；The SPM turns off output current phase to stop compressor according to the protection signal
Operation, while exporting error protection signal so that the MCU stops the output drive signal；Characterized in that, the compression
Machine protection circuit also includes：
Feedback module, input is connected with the output end of the voltage comparison module, and output end is with the voltage ratio compared with mould
The input connection of block；When the voltage comparison module is in the excessive output protection signal of compressor phase current, by the voltage
The protection signal of comparison module output feeds back to the input of the voltage comparison module so that the voltage comparison module continues
Export the protection signal；
Unlocked state, control end is connected with the MCU, and output end is connected with the input of the voltage comparison module；
After the SPM shut-off output current phase, the MCU outputs control signals to the unlocked state, the solution locked mode
Block exports unlocking signal to the voltage comparison module, so that the voltage comparison module exports normal signal to the intelligent work(
Rate module, the SPM is according to the drive signal output current phase that the normal signal and the MCU are exported driving
Dynamic compressor operating.
Preferably, the feedback module includes first resistor and the first diode；
The anode of first diode is the input of the feedback module, the negative electrode connection institute of first diode
One end of first resistor is stated, the other end of the first resistor is the output end of the feedback module.
Preferably, the feedback module includes second resistance and the second diode；
The input of feedback module described in one end of the second resistance, the other end connection described the of the second resistance
The anode of two diodes, the negative electrode of second diode is the output end of the feedback module.
Preferably, the unlocked state includes 3rd resistor and the 5th NPN type triode；
The base stage of the 5th NPN type triode connects one end of the 3rd resistor, the other end of the 3rd resistor
It is the control end of the unlocked state, the grounded emitter of the 5th NPN type triode, the 5th NPN type triode
The output end of the extremely described unlocked state of current collection.
Preferably, the unlocked state includes the 11st resistance and the 6th PNP type triode；
The base stage of the 6th PNP type triode connects one end of the 11st resistance, the 11st resistance it is another
One end is the control end of the unlocked state, the grounded collector of the 6th PNP type triode, the pole of the 6th positive-negative-positive three
The output end of the extremely described unlocked state of transmitting of pipe.
Preferably, the compressor protective circuit also includes signal shaping module, the input of the signal shaping module
Connect the output end of the voltage comparison module, the signal shaping module output end connect the feedback module input and
The SPM, the signal shaping module carries out defeated after Shape correction to the signal that the voltage comparison module is exported
Go out to the SPM and feedback module.
Preferably, the voltage comparison module includes reference voltage generation unit and first comparator, the reference voltage
Generation unit generates the reference voltage, and the input of the voltage comparison module connects the homophase input of the first comparator
End, the voltage generating unit connects the inverting input of the first comparator
Preferably, the signal shaping module includes the 4th resistance and the first PNP type triode；
The base stage of first PNP type triode is the input of the signal shaping module, the pole of the first positive-negative-positive three
The grounded collector of pipe, the emitter stage of first PNP type triode is the letter with the common contact of described 4th resistance one end
The output end of number Shaping Module, the 4th resistance other end connects dc source.
Preferably, the signal shaping module includes the 5th resistance and the second NPN type triode；
The base stage of second NPN type triode is the input of the signal shaping module, the pole of the second NPN type three
The colelctor electrode connection dc source of pipe, the common contact of the emitter stage of second NPN type triode and described 5th resistance one end
It is the output end of the signal shaping module, the 5th resistance other end ground connection.
Preferably, the voltage comparison module includes reference voltage generation unit and the second comparator, the reference voltage
Generation unit generates the reference voltage, and the first input end of the voltage comparison module connects the anti-phase of second comparator
Input, the voltage generating unit connects the in-phase input end of second comparator.
Preferably, the signal shaping module includes the 6th resistance and the 3rd PNP type triode；
The base stage of the 3rd PNP type triode is the input of the signal shaping module, the pole of the 3rd positive-negative-positive three
The emitter stage connection dc source of pipe, the colelctor electrode of the 3rd PNP type triode and the common contact of described 6th resistance one end
It is the output end of the signal shaping module, the 6th resistance other end ground connection.
Preferably, the signal shaping module includes the 7th resistance and the 4th NPN type triode；
The base stage of the 4th NPN type triode is the input of the signal shaping module, the pole of the 4th NPN type three
The grounded emitter of pipe, the colelctor electrode of the 4th NPN type triode is the letter with the common contact of described 7th resistance one end
The output end of number Shaping Module, the 7th resistance other end connects dc source.
Preferably, the compressor protective circuit also includes temperature protection module, the input of the temperature protection module
The SPM is connected, the output end of the temperature protection module connects the input of the voltage comparison module；
When the SPM temperature is too high, SPM is protected by temperature protection module output temperature
Signal to the voltage comparison module input so that the voltage comparison module output protection signal is to the intelligent power
Module, the SPM turns off output current phase to stop the compressor operating according to the protection signal.
Preferably, the temperature protection module includes the 8th resistance, the 9th resistance and the 3rd diode；
One end of 8th resistance is the input of the temperature protection module, the other end of the 8th resistance and institute
The one end for stating the 9th resistance is connected to the anode of the 3rd diode altogether, and the negative electrode of the 3rd diode is the temperature protection
The output end of module, the other end ground connection of the 9th resistance.
Preferably, the voltage comparison module also includes the tenth resistance, and described tenth resistance one end connects the voltage ratio
Compared with the output end of module, other end connection dc source.
To achieve the above object, the present invention also provides a kind of air-conditioner, including described compressor protective circuit.
The compressor protective circuit that the present invention is provided is by with current sample module, voltage comparison module, MCU and intelligence
Energy power model increases feedback module and unlocked state, and the input and output of voltage comparison module are connected to due to feedback module
End, unlocked state is connected to the input of voltage comparison module, therefore circuit structure can be made relatively easy, relatively existing skill
Single latch cicuit the need in art, resolution circuitry provided in an embodiment of the present invention is simple, can reduces cost.
Brief description of the drawings
Fig. 1 is compressor protective circuit modular structure schematic diagram of the present invention；
Fig. 2 is the circuit structure diagram of compressor protective circuit second embodiment of the present invention；
Fig. 3 is the circuit structure diagram of compressor protective circuit 3rd embodiment of the present invention；
Fig. 4 is the circuit structure diagram of compressor protective circuit fourth embodiment of the present invention；
Fig. 5 is the modular structure schematic diagram of the embodiment of compressor protective circuit of the present invention 5th；
Fig. 6 is the circuit structure diagram of the embodiment of compressor protective circuit of the present invention 5th；
Fig. 7 is another circuit structure diagram of the embodiment of compressor protective circuit of the present invention 5th；
Fig. 8 is the circuit structure diagram of compressor protective circuit sixth embodiment of the present invention；
Fig. 9 is another circuit structure diagram of compressor protective circuit sixth embodiment of the present invention；
Figure 10 is the circuit structure diagram of the embodiment of compressor protective circuit of the present invention 7th；
Figure 11 is the modular structure schematic diagram of the embodiment of compressor protective circuit of the present invention 8th；
Figure 12 is the circuit structure diagram of the embodiment of compressor protective circuit of the present invention 8th；
Figure 13 is another circuit structure diagram of the embodiment of compressor protective circuit of the present invention 8th.
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
It is exemplary to scheme the embodiment of description, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Reference picture 1, Fig. 1 is the function structure chart of compressor protective circuit provided in an embodiment of the present invention, for the ease of saying
It is bright, the part related to the embodiment of the present invention is illustrate only, details are as follows：
Compressor protective circuit provided in an embodiment of the present invention include current sample module 10, voltage comparison module 20,
MCU50 and SPM 60；The drive signal output current phase that the module of intelligent power 60 is exported according to MCU50 is to drive
Compressor 70 runs；Current sample module 10 is sampled to the phase current of compressor 70 and is exported corresponding sampled voltage signal
To voltage comparison module 20；Be compared for sampled voltage signal and reference voltage signal by voltage comparison module 20, in sampling electricity
When pressure signal is more than reference voltage signal, output protection signal to SPM 60；SPM 60 is according to protection
Signal shut-off output current phase is run with stopping compressor 70, while exporting error protection signal so that MCU50 stops output and drives
Dynamic signal；Compressor protective circuit also includes：
Feedback module 30, input is connected with the output end of voltage comparison module 20, output end and voltage comparison module 20
Input connection；When voltage comparison module 20 is in the excessive output protection signal of the phase current of compressor 70, by voltage ratio compared with mould
The protection signal of the output of block 20 feeds back to the input of voltage comparison module 20 so that voltage comparison module 20 continues output protection
Signal；
Unlocked state 40, control end is connected with MCU50, and output end is connected with the input of voltage comparison module 20；In intelligence
After the energy shut-off output current phase of power model 60, MCU50 outputs control signals to unlocked state 40, the output unblock of unlocked state 40
Signal is to voltage comparison module 20, so that voltage comparison module 20 exports normal signal to SPM 60, intelligent power
Module 60 is according to the drive signal output current phase that normal signal and MCU50 are exported driving compressor 70 to run.
Compressor protective circuit provided in an embodiment of the present invention is by with current sample module 10, voltage comparison module
20th, MCU50 and SPM 60 increase feedback module 30 and unlocked state 40, because feedback module 30 is connected to voltage ratio
Compared with the input and output side of module 20, unlocked state 40 is connected to the input of voltage comparison module 20, therefore circuit structure can
It is relatively easy to be made, compared with the prior art in the need for individually latch cicuit, resolution circuitry provided in an embodiment of the present invention
Simply, can reduces cost.
Reference picture 2, Fig. 2 is the circuit structure diagram of compressor protective circuit second embodiment of the present invention, is pressed based on the present invention
Protecting compressor circuit first embodiment, for convenience of description, illustrate only the part related to the embodiment of the present invention, specifically such as
Under：
Current sample module 10 is based primarily upon resistance RS compositions, and one end connection SPM 60 of resistance RS drives pressure
Emitter stage output pin Iu, Iv, Iw of lower bridge arm switching tube U, V, W three-phase inside contracting machine 70, these three pin output currents are
The three-phase current of IPM module drives compressor 70, this tie point is connected to the input of voltage comparison module 20, resistance RS simultaneously
Another termination equipotential ground, resistance RS is generally the high-power resistance of small resistance, such as the ceramic resistor of milliohm level, for IPM
The three-phase current of module drive compressor 70 produces voltage on resistance RS, to generate sampled voltage signal.
Voltage comparison module 20 includes first comparator IC1, the input connection first comparator of voltage comparison module 20
The in-phase input end of IC1；Voltage comparison module 20 also includes reference voltage generation unit 21, and reference voltage generation unit 21 is connected
To the inverting input of first comparator IC1, the reference voltage of the generation voltage comparison module 20 of reference voltage generation unit 21, ginseng
Examine voltage generating unit 21 to be made up of the 12nd resistance R1, the 13rd resistance R4, wherein one end of the 12nd resistance R1 is connected to
Dc source, the other end connects the 13rd resistance R4, the 13rd resistance R4 other ends ground connection, from the 12nd resistance R1 and the 13rd
The tie point output reference voltage signal of resistance R4 is simultaneously connected to the inverting input of first comparator IC1；Wherein voltage ratio compared with
The input of module 20 can also connect the in-phase input end of first comparator IC1 by the 14th resistance R2, as shown in Fig. 2
14th resistance R2 plays the sampled voltage signal isolation and metering function to the output of current sample module 10, and protection first is compared
The input pin of device IC1.
Feedback module 30 includes first resistor R5 and the first diode D1；The anode of the first diode D1 is feedback module 30
Input, one end of the negative electrode connection first resistor R5 of the first diode D1, the other end of first resistor R5 is feedback module
30 output end.
Unlocked state 40 includes 3rd resistor R7 and the 5th NPN type triode Q1；The base stage of the 5th NPN type triode Q1 connects
One end of 3rd resistor R7 is connect, the other end of 3rd resistor R7 is the control end of unlocked state 40, the 5th NPN type triode Q1's
Grounded emitter, the output end of the current collection extremely unlocked state 40 of the 5th NPN type triode Q1.
SPM 60 be the existing SPM 60 comprising controller and upper and lower bridge arm switching tube (i.e.
IPM, Intelligent Power Module), wherein Iu, Iv, Iw be U, V, W three-phase of lower bridge arm switching tube emitter stage it is defeated
Go out pin, Cin is failure and protection signal detection pin, and its failure and protection signal are effective when high level signal occurs in this pin,
The inside of SPM 60 can turn off the output of U, V, W three-phase pin volume to close load, and U, V, W three-phase output pin connect herein
Compressor 70 is connected to, compressor 70 here is frequency-changeable compressor；F0 pins are fault-signal output pin, when the event of Cin pins
When barrier and protection signal are effective, F0 pins export effective fault-signal；UP, VP, WP, UN, VN, WN are upper and lower bridge arm switching tube
Drive signal input pin, SPM 60 is input to so that SPM 60 drives by this 6 drive signals
Compressor 70 works.
MCU50 is signal processing chip, contains the software algorithm program for driving the work of SPM 60 so that negative
Carry compressor 70 to be run according to the drive signal that MCU50 is exported, wherein the output control terminal connection control end of unlocked state 40, excessively stream
Protection test side is connected to the output end of voltage comparison module 20, and IPM module failures detection pin is connected to SPM 60
F0 pins.
The operation principle of this compressor protective circuit is described further below in conjunction with Fig. 2：
When compressor 70 is working properly, it drives the three-phase current normal in size of compressor 70, now intelligent power mould
Voltage of emitter stage output pin Iu, Iv, Iw electric current of U, V, W three-phase of 60 times bridge arm switching tubes of block on RS compares less than first
Device IC1 by inverting input reference voltage, now first comparator IC1 output low level, the one or two pole of feedback module 30
Pipe D1 is not turned on；When the failure due to the body of compressor 70 or the internal fault of SPM 60 cause the work of compressor 70
When electric current increase is the phase current increase of the output of SPM 60, the emitter stage of U, V, W three-phase of its lower bridge arm switching tube
Output pin Iu, Iv, Iw electric current correspondence increase, and make inverting input electricity of the voltage on resistance RS more than first comparator IC1
During pressure, now first comparator IC1 outputs high level signal is the excessive signal of phase current of compressor 70, now feedback module 30
First diode D1 is turned on, and first comparator IC1 output high level signals are fed back to by the first diode D1 and first resistor
The in-phase input end of first comparator IC1 so that the in-phase input end of first comparator IC1 is constantly in high level state, enters
And cause that the voltage of the in-phase input end of first comparator IC1 maintains the reference voltage high state than inverting input, even if
At this moment the voltage on RS less than first comparator IC1 by inverting input reference voltage, thus now first comparator IC1
Output is locked in output high level state；The high level signal of first comparator IC1 outputs is exported to intelligent power mould simultaneously
Failure and protection signal the detection pin Cin of block 60, SPM 60 are turned off immediately according to effective failure and protection signal
Its phase current exports to control compressor 70 to shut down, although SPM 60 turns off the output of its phase current causes Iu, Iv, Iw
Electric current be zero so that voltage on RS less than first comparator IC1 by inverting input reference voltage, but due to now first
The output of comparator IC1 is locked in output high level state, therefore SPM 60 persistently turns off the output of its phase current
To control compressor 70 to shut down, while being detected effectively in failure and protection signal detection the pin Cin of SPM 60
When failure and protection signal, can be corresponded in its fault-signal output pin F0 and export a level pulse fault-signal to MCU50,
MCU50 stops its 6 drive signals to SPM 60 of output according to the fault-signal for detecting, during this period, i.e.,
Make to run into external high reject signal on this 6 drive signals of MCU50, because SPM 60 is defeated in persistently turning off
Do well, will not also cause SPM 60 that the output of high current occurs during drive signal is disturbed, so as to compression
Machine 70 plays the effect of being effectively protected.When after the interlock circuit normal work or the failture evacuation of compressor 70 of compressor 70
(such as MCU50 reads the state of IPM modules by state parameter stabilization or MCU50 that coherent detection electric current obtains compressor 70
Parameter stability), MCU50 output control terminals output high level pulse signal causes the 5th NPN type triode Q1 of unlocked state 40
Conducting, the in-phase input end of first comparator IC1 is pulled to low level so that first comparator IC1 exports low level signal, instead
The first diode D1 cut-offs of module 30 are presented, while this low level signal is input to the Cin pin of SPM 60, its failure
Released with protection signal, SPM 60 is working properly, and in the fault-signal contact of its F0 pin output, MCU50 according to
This trouble shooting signal output drive signal controls the output current phase of SPM 60 to drive compressor 70 normally to run.
It should be noted that MCU50 output control terminals export high level pulse signal causes SPM 60 to unlocked state 40
When the failure and protection signal of pin Cin are released, MCU50 output control terminals can not export high level signal, it is necessary to be high level arteries and veins
Signal is rushed, because between MCU50 output control terminals output high period, the 5th NPN type triode Q1 is turned on and caused that first compares
The in-phase input end of device IC1 is pulled to low level, and then last so that the failure and protection signal of the pin Cin of SPM 60
Release, hereafter to drive, compressor 70 is normal to be run the MCU50 output drive signals control output current phase of SPM 60,
If hereafter the 5th NPN type triode Q1 will always drag down the in-phase input end of first comparator IC1, electricity also in conducting
The sampled voltage signal of the stream output of sampling module 10 can not normally be input to the in-phase input end of first comparator IC1 so that first
Comparator IC1 plays normal electric current and compares left and right, therefore exports high level pulse signal to unblock in MCU50 output control terminals
After module 40 causes that the failure and protection signal of the pin Cin of SPM 60 are released, low level need to be exported so that the 5th NPN type
Triode Q1 ends, to enable first comparator IC1 normal works.
In the present embodiment, unlocked state 40 can also include the 15th resistance R9, one end connection NPN of the 15th resistance R9
The base stage of type triode Q1, one end with 3rd resistor R7 connects altogether, the other end ground connection of the 15th resistance R9, i.e. the 15th resistance
R9 is connected across in the base stage and emitter stage of NPN type triode Q1, plays NPN type triode Q1 energy when MCU50 exports low level
Reliable cut-off effect.The output end of first comparator IC1 can also be connected to SPM 60 by the 16th resistance R3
Failure and protection signal detection pin Cin, the 16th resistance R3 play current limliting or so, protect the pin of SPM 60
Cin, similarly, the output end of first comparator IC1 can also be connected to MCU50, the 17th resistance R6 by the 17th resistance R6
Effect it is identical with the 16th resistance R3.
Compressor protective circuit provided in an embodiment of the present invention is generated by with current sample module 10, reference voltage
Module 30, voltage comparison module 20, MCU50 and SPM 60 increase feedback module 30 and unlocked state 40, feed back mould
The input/output terminal of block 30 connects the output end and input of voltage comparison module 20, the control end of unlocked state and output respectively
End connects the input of MCU and voltage comparison module 20 respectively, because feedback module 30 only passes through a diode and resistance reality
Existing, unlocked state 40 only realizes that its circuit latch cicuit compared with the prior art will letter by a triode and a resistance
It is single a lot, it is not necessary to which that extra increase latches chip, therefore the relatively existing latch cicuit cost reduction of embodiment of the present invention scheme
And reliable operation, be conducive to the large-scale popularization application of compressor protective circuit.
Reference picture 3, Fig. 3 is the circuit structure diagram of compressor protective circuit 3rd embodiment of the present invention, is pressed based on the present invention
Protecting compressor circuit first embodiment, the compressor protective circuit with respect to Fig. 2, its difference is feedback module 30, other
Module is same as shown in Figure 2, therefore repeats no more.
Feedback module 30 includes second resistance R17 and the second diode D2；The anode of the second diode D2 is feedback module
30 input, one end of the negative electrode connection second resistance R17 of the second diode D2, the other end of second resistance R17 is feedback
The output end of module 41.The circuit structure of the feedback module 30 with respect to Fig. 1, its difference is the company by resistance and diode
Position exchange is connect, the function of feedback module is not influenceed.
Reference picture 4, Fig. 4 is the circuit structure diagram of compressor protective circuit fourth embodiment of the present invention, is pressed based on the present invention
Protecting compressor circuit first embodiment, the compressor protective circuit with respect to Fig. 2, its difference is unlocked state 40, other
Module is same as shown in Figure 2, therefore repeats no more.
Unlocked state 40 includes the 11st resistance R21 and the 6th PNP type triode Q6；The base of the 6th PNP type triode Q6
Pole connects one end of the 11st resistance R21, and the other end of the 11st resistance R21 is the control end of unlocked state 40, the 6th positive-negative-positive
The grounded collector of triode Q6, the output end of the transmitting extremely unlocked state of the 6th PNP type triode Q6.
Unlike work from the unlocked state circuit in second embodiment, when compressor 70 is working properly, MCU50
Output high level signal causes that the 6th PNP type triode Q6 ends, to cause that first comparator IC1 can be with normal work；Work as intelligence
The phase current increase of the energy output of power model 60 causes the output of first comparator IC1 to be locked output high level protection signal to be made
After obtaining the generation protection shut-off output of SPM 60, after the failture evacuation of machine to be compressed 70, MCU50 exports low level pulse to be believed
Number turn on the 6th PNP type triode Q6 short time, to the output of first comparator IC1 unblock, and then so that intelligent power
Module 60 and MCU50 control compressor normal works.
Unlocked state 40 can also include the 18th resistance R20, and one end of the 18th resistance R20 connects the 6th positive-negative-positive three
The base stage of pole pipe Q6, one end with the 11st resistance R21 connects altogether, other end connection the 6th positive-negative-positive three pole of the 18th resistance R20
The colelctor electrode of pipe Q6, i.e. the 18th resistance R20 are connected across in the base stage and colelctor electrode of the 6th PNP type triode Q6, play the 6th
PNP type triode Q6 can reliably cut-off effect when MCU50 exports high level.
Reference picture 5, Fig. 5 is the function structure chart of the embodiment of compressor protective circuit of the present invention 5th, is pressed based on the present invention
Protecting compressor circuit first embodiment, compressor protective circuit also include signal shaping module 80, signal shaping module 80 it is defeated
Enter the output end of end connection voltage comparison module 20, the input and intelligence of the output end of signal shaping module 80 connection feedback module 30
Energy power model 60, signal shaping module 80 is exported to intelligence after carrying out Shape correction to the signal that voltage comparison module 20 is exported
Power model 60 and feedback module 30.
The protection signal of the output of voltage comparison module 20 when signal shaping module 80 is excessive to the phase current of compressor 70, or
The normal signal of the output of voltage comparison module 20 carries out shaping and isolation when compressor 70 is working properly, while feedback mould is arrived in output
The input of block 30 and the failure of SPM 60 and protection signal detection pin Cin.
The particular circuit configurations of signal shaping module 80 are different according to the circuit structure difference of voltage comparison module 20.
In to the circuit structure of voltage comparison module 20 as shown in Figure 2, i.e., the input of voltage comparison module 20 connects
Connect the in-phase input end of first comparator IC1, the connection first comparator of reference voltage generation unit 21 of voltage comparison module 20
The inverting input of IC1, signal shaping module 80 can have two kinds of different circuit structures, specific as follows：
Reference picture 6, Fig. 6 is a kind of circuit structure diagram of the signal shaping module 80 of compressor protective circuit of the present invention, letter
Number Shaping Module 80 includes the 4th resistance R10 and the first PNP type triode Q2, and the base stage of the first PNP type triode Q2 is signal
The input of Shaping Module, the grounded collector of the first PNP type triode Q2, the emitter stage of the first PNP type triode Q2 and
The common contact of four resistance R10 one end is the output end of signal shaping module, the 4th resistance R10 other ends connection dc source VCC.
Signal shaping module 80 can also include the 19th resistance R11, and one end of the 19th resistance R11 connects the first PNP type triode
The base stage of Q2, the other end ground connection of the 19th resistance R11, i.e., the 19th resistance R11 is connected across the base of the first PNP type triode Q2
On pole and emitter stage, playing the first PNP type triode Q2 can reliably cut-off effect when first comparator IC1 exports low level.
In compressor 70 and SPM 60 working properly, first comparator IC1 output low levels, a PNP
Type triode Q2 is turned on, therefore its emitter stage exports low level and detects pin to the failure and protection signal of SPM 60
Cin and feedback module 30, now failure and protection signal are invalid, while the first diode D1 cut-offs of feedback module 30；In pressure
When the phase current of contracting machine 70 is excessive, first comparator IC1 output high level, the first PNP type triode Q2 cut-offs, therefore its emitter stage
Output high level detects pin Cin and feedback module 30 to the failure and protection signal of SPM 60, now failure and guarantor
Effectively, while the first diode D1 conductings of feedback module 30, SPM 60 is according to effective failure and guarantor for shield signal
Shield signal turns off the output of its phase current to control compressor 70 to shut down immediately, while this high level signal is through passing through the first diode
D1 and first resistor feed back to the in-phase input end of first comparator IC1 so that the in-phase input end of first comparator IC1 is always
In high level state, the output of first comparator IC1 is set to be locked in output high level state so that SPM 60
Failure and protection signal detection pin Cin failure and protection signal continuously effective.Other operation principles and second embodiment Fig. 2
Shown circuit is identical, is not repeating.
Reference picture 7, Fig. 7 is another circuit structure diagram of the signal shaping module 80 of compressor protective circuit of the present invention,
Other circuit structures are identical with Fig. 6, and Shaping Module includes the 5th resistance R13 and the second NPN type triode Q3；Second NPN type three
The base stage of pole pipe Q3 is the input of signal shaping module, its input connection voltage comparison module 20, the second NPN type triode
The common contact of the colelctor electrode connection dc source of Q3, the emitter stage of the second NPN type triode and the 5th resistance R13 one end is signal
The output end of Shaping Module, its output end is connected to SPM 60 and feedback module 30, the 5th another terminations of resistance R13
Ground.It is similar with the 19th resistance R11 in Fig. 6, the 20th resistance R12 can also be included, one end of the 20th resistance R12 connects
The base stage of the second NPN type triode Q3, the other end ground connection of the 20th resistance R12.
In compressor 70 and SPM 60 working properly, first comparator IC1 output low levels, the 2nd NPN
Type triode Q3 ends, therefore its emitter stage exports low level and detects pin to the failure and protection signal of SPM 60
Cin and feedback module 30, now failure and protection signal are invalid；When the phase current of compressor 70 is excessive, first comparator IC1 is defeated
Go out high level, the second NPN type triode Q3 conductings, therefore its emitter stage output high level to SPM 60 failure with
Protection signal detects pin Cin and feedback module 30, and now failure and protection signal are effective, while the one or two pole of feedback module 30
Pipe D1 is turned on, and SPM 60 turns off the output of its phase current to control compression immediately according to effective failure and protection signal
Machine 70 is shut down, while this high level signal is through the in-phase input end by feedback module 30 to first comparator IC1 so that first
The in-phase input end of comparator IC1 is constantly in high level state, the output of first comparator IC1 is locked in output electricity high
Level state so that the failure and protection signal continuously effective of failure and protection signal detection the pin Cin of SPM 60.Its
His operation principle is identical with circuit shown in second embodiment Fig. 2, is not repeating.
Reference picture 8, Fig. 8 is the circuit structure diagram of compressor protective circuit sixth embodiment of the present invention, is pressed based on the present invention
Protecting compressor circuit first embodiment, the compressor protective circuit with respect to Fig. 6, difference is voltage comparison module 20 and letter
Number Shaping Module 80, other modules are same as shown in Figure 6.
Voltage comparison module 20 includes the second comparator IC2, and the input of voltage comparison module 30 connects the second comparator
The inverting input of IC2, the reference voltage generation unit 22 of voltage comparison module 20 connects the homophase input of the second comparator IC2
End.Reference voltage generation unit 22 is connected with the circuit of the reference voltage generation unit 21 of the 5th embodiment and function phase is same.
Signal shaping module 80 includes the 6th resistance R14 and the 3rd PNP type triode Q4, the 3rd PNP type triode Q4's
Base stage is the input of signal shaping module 80, the emitter stage connection dc source of the 3rd PNP type triode Q4, the 3rd positive-negative-positive
The common contact of the colelctor electrode of triode Q4 and the 6th resistance R14 one end is the output end of signal shaping module 80, the 6th resistance R14
The other end is grounded.Similar with the 19th resistance R11 in Fig. 6, signal shaping module 80 can also include the 21st resistance
One end of R13, the 21st resistance R13 connect the base stage of the 3rd PNP type triode Q4, the other end of the 21st resistance R13
Connect the colelctor electrode of the 3rd PNP type triode Q4, i.e. the 21st resistance R13 and be connected across the base stage of the 3rd PNP type triode Q4
On colelctor electrode, playing the 3rd PNP type triode Q4 can reliably cut-off effect when the second comparator IC2 exports high level.
In compressor 70 and SPM 60 working properly, the second comparator IC2 output high level, the 3rd PNP
Type triode Q4 ends, therefore its colelctor electrode exports low level and detects pin to the failure and protection signal of SPM 60
Cin and feedback module 30, now failure and protection signal are invalid, while the first diode D1 cut-offs of feedback module 30；In pressure
When the phase current of contracting machine 70 is excessive, the second comparator IC2 output high level, the 3rd PNP type triode Q4 conductings, therefore its colelctor electrode
Output high level detects pin Cin and feedback module 30 to the failure and protection signal of SPM 60, now failure and guarantor
Effectively, while the first diode D1 conductings of feedback module 30, SPM 60 is according to effective failure and guarantor for shield signal
Shield signal turns off the output of its phase current to control compressor 70 to shut down immediately, while this high level signal is through passing through the first diode
D1 and first resistor feed back to the inverting input of the second comparator IC2 so that the inverting input of the second comparator IC2 is always
In high level state, the output of the second comparator IC2 is set to be locked in output low level state so that SPM 60
Failure and protection signal detection pin Cin failure and protection signal continuously effective.Other operation principles and second embodiment Fig. 2
Shown circuit is identical, is not repeating.
Reference picture 9, Fig. 9 is another circuit structure diagram of the signal shaping module 80 of compressor protective circuit of the present invention,
Other circuit structures are identical with Fig. 7, and Shaping Module includes the 7th resistance R16 and the 4th NPN type triode Q5；4th NPN type three
The base stage of pole pipe Q5 is the input of signal shaping module, its input connection voltage comparison module 20, the 4th NPN type triode
The common contact of the colelctor electrode of Q5 and the 7th resistance R16 one end is the output end of signal shaping module, the 7th another terminations of resistance R16
Dc source VCC.It is similar with the 21st resistance R13 in Fig. 8, the 22nd resistance R15 can also be included, resistance R15's
One end connects the base stage of the 4th NPN type triode Q5, the other end ground connection of the 22nd resistance R15.
In compressor 70 and SPM 60 working properly, the second comparator IC2 output high level, the 4th NPN
Type triode Q5 is turned on, therefore its colelctor electrode exports low level and detects pin to the failure and protection signal of SPM 60
Cin and feedback module 30, now failure and protection signal are invalid；When the phase current of compressor 70 is excessive, the second comparator IC1 is defeated
Go out low level, the 4th NPN type triode Q5 cut-offs, therefore its colelctor electrode output high level to SPM 60 failure with
Protection signal detects pin Cin and feedback module 30, and now failure and protection signal are effective, while the one or two pole of feedback module 30
Pipe D1 is turned on, and SPM 60 turns off the output of its phase current to control compression immediately according to effective failure and protection signal
Machine 70 is shut down, while this high level signal is through the inverting input by the comparator of feedback module 30 to the second IC2 so that second
The inverting input of comparator IC2 is constantly in high level state, the output of the second comparator IC2 is locked in the low electricity of output
Level state so that the failure and protection signal continuously effective of failure and protection signal detection the pin Cin of SPM 60.Its
His operation principle is identical with circuit shown in second embodiment Fig. 2, is not repeating.
Reference picture 10, Figure 10 is the circuit structure diagram of the embodiment of compressor protective circuit of the present invention 7th, based on the present invention
Compressor protective circuit second or sixth embodiment, relative to the compressor protective circuit of Fig. 2 or Fig. 8, difference is electricity
Pressure comparison module 20 also includes the tenth resistance R17, and the tenth resistance one end connects the output end of voltage comparison module, other end connection
Dc source VCC.
The second comparator IC2 models in first comparator IC1 or Fig. 8 in the 3rd comparator IC3 and Fig. 2 in Figure 10
The comparator of internal output triode open collector output type can be used with difference, the 3rd comparator IC3, its own is not
High level directly can be exported, it is necessary to passing through the tenth resistance R17 is pulled upward to VCC output high level；And first comparator IC1 and second
, due to the pull-up resistor without similar tenth resistance R17, its comparator must be using internal output three for the output end of comparator IC2
Pole pipe recommending output mode type, its comparator itself must can export high level.Certain 3rd comparator IC3 can also be using inside
Output triode recommending output mode type comparator, therefore the tenth resistance R17 by pulling up, the comparator that the present embodiment can be adapted to
Type Range is wider.
Reference picture 11, Figure 11 is the function structure chart of the embodiment of compressor protective circuit of the present invention 8th, based on the present invention
Compressor protective circuit first embodiment, compressor protective circuit also includes temperature protection module 90, temperature protection module 90
Input connects the SPM 60, and the output end of temperature protection module 90 connects the defeated of the voltage comparison module 20
Enter end.
When the temperature of SPM 60 is too high, SPM 60 is protected by the output temperature of temperature protection module 90
Shield signal to voltage comparison module 20 input so that the output protection signal of voltage comparison module 20 is to SPM
60, SPM 60 turns off output current phase to stop compressor operating according to protection signal.
Reference picture 12, Figure 12 is the circuit structure of the temperature protection module 90 that compressor protective circuit of the present invention is based on Figure 11
Figure, temperature protection module includes the 8th resistance R18, the 9th resistance R19 and the 3rd diode D3；
One end of 8th resistance R18 is the input of temperature protection module, the other end and the 9th resistance of the 8th resistance R18
One end of R19 is connected to the anode of the 3rd diode D3 altogether, and the negative electrode of the 3rd diode D3 is the output end of temperature protection module, the
The other end ground connection of nine resistance R19.
The SPM 60 that the embodiment of the present invention is used is the SPM with temperature signal output function, its
The internal temperature of SPM 60 is detected, and by the TO pin output reflection temperature of SPM 60 in such as Figure 11
Signal, such as with the internal temperature that different magnitude of voltage reflection SPMs 60 is different, when the operating current of compressor is too high
When the phase current for causing SPM 60 to export is excessive, quickly, at this moment the temperature rise of the body of SPM 60 can increase
If can not be effectively protected is easily damaged module.The voltage letter of the TO pin output reflection temperature of its SPM 60
Number by composition the 8th resistance R18 and the 9th resistance R19 bleeder circuit generate appropriate voltage range magnitude of voltage, by the 3rd
Diode D3 exports the in-phase input end to first comparator IC1 in voltage comparison module 20；3rd diode D3 plays isolation
Effect, the interference signal isolation produced to the in-phase input end of first comparator IC1, prevent due to compressor three-phase current Iu,
Interference signal to the in-phase input end of first comparator IC1 is produced on Iv, Iw, the TO for damaging SPM 60 is finally resulted in
Pin；When the temperature of SPM 60 is too high, its TO pin output voltage signal is raised, and is finally more than the voltage on resistance RS
During the anti-phase input terminal voltage of first comparator IC1, first comparator IC1 output high level signals are the phase current mistake of compressor 70
Big signal, other operation principles are same as shown in Figure 2, therefore repeat no more.
Temperature protection module 90 is increased by compressor protective circuit of the present invention, the work when 70 pieces of intelligent power mould can be caused
Make reliably to be protected when temperature is too high, prevent its heating serious so that damaging.
Reference picture 13, Figure 13 is the complete compressor control phase comprising compressor protective circuit of the present invention based on Figure 12
The application circuit structure chart for closing, its operation principle is as follows：
Diode D4-D7 constitutes the rectification circuit of ac input end, and rectification is carried out to AC-input voltage, is converted into direct current
Pulsating volage, L, D8, C4 constitute passive PFC circuit, and the DC pulse moving voltage to rectification circuit output carries out Active PFC,
C5 is the high-voltage filtering capacitor of Large Copacity, and smothing filtering into galvanic current pressure is carried out to DC pulse moving voltage, is intelligent work(
Rate module I C5 provides the dc source described in work, and SPM IC5 output U, V, W three-phase currents drive frequency conversion compression
Machine M works.
Upper bridge arm IGBT (the Insulated Gate Bipolar that SPM IC5 is constituted comprising S1, S3, S5
Transistor) the lower bridge arm IGBT switching tubes and controller that switching tube and S2, S4, S6 are constituted；Wherein controller is HVIC
(High Voltage Integrated Circuit) is high voltage integrated circuit and LVIC (Low Voltage
IntegratedCircuit) it is low-voltage ic, HVIC is used to drive bridge arm IGBT switching tubes, under LVIC is for driving
Bridge arm IGBT switching tubes and including relevant control and status signal pin, specifically include fault-signal output pin F0, failure and guarantor
U, V, W tri- of shield signal detection pin Cin, SPM internal temperature detection signal output pin TO and lower bridge arm switching tube
Emitter stage output pin Iu, Iv, Iw of phase.
MCU IC4 are signal processing chip, contain the software algorithm program that drives SPM IC5 work and
Its state-detection, state-detection relative program of frequency-changeable compressor M etc.；Six pins of P3-P7 of MCU are connected respectively to intelligent work(
Wn, Vn, Un, Wp, Vp, Up input pin of rate module I C5, this six input pins are connected to LVIC and HVIC, are passed through with this
LVIC and HVIC drives the IGBT switching tubes of upper and lower bridge arm.
Shown in other parts circuit and Figure 12 comprising current sample module, voltage comparison module, feedback module, solution locked mode
Block, temperature protection module interlock circuit, its operation principle are identical with Figure 12, will not be repeated here.
The present invention also provides a kind of air-conditioner, including above-mentioned compressor protection circuit, and its air-conditioner is transducer air conditioning, its
Specific embodiment refers to above-described embodiment, will not be repeated here.
The preferred embodiments of the present invention are these are only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (16)
1. a kind of compressor protective circuit, including current sample module, voltage comparison module, MCU and SPM；It is described
The drive signal output current phase that SPM is exported according to the MCU is to drive compressor operating；The electric current is adopted
Egf block is sampled to the phase current of compressor and is exported corresponding sampled voltage signal to the voltage comparison module；It is described
With reference voltage signal be compared the sampled voltage signal by voltage comparison module, and institute is more than in the sampled voltage signal
When stating reference voltage signal, output protection signal to the SPM；The SPM is according to the protection
Signal turns off output current phase to stop compressor operating, while exporting error protection signal so that the MCU stops output institute
State drive signal；Characterized in that, the compressor protective circuit also includes：
Feedback module, input is connected with the output end of the voltage comparison module, output end and the voltage comparison module
Input is connected；When the voltage comparison module is in the excessive output protection signal of compressor phase current, by the voltage ratio compared with
The protection signal of module output feeds back to the input of the voltage comparison module so that the voltage comparison module is persistently exported
The protection signal；
Unlocked state, control end is connected with the MCU, and output end is connected with the input of the voltage comparison module；Described
After SPM shut-off output current phase, the MCU outputs control signals to the unlocked state, and the unlocked state is defeated
Go out unlocking signal to the voltage comparison module, so that the voltage comparison module exports normal signal to the intelligent power mould
Block, the SPM is according to the drive signal output current phase that the normal signal and the MCU are exported driving pressure
Contracting machine runs.
2. compressor protective circuit as claimed in claim 1, it is characterised in that the feedback module includes first resistor and the
One diode；
The anode of first diode is the input of the feedback module, the negative electrode connection of first diode described the
One end of one resistance, the other end of the first resistor is the output end of the feedback module.
3. compressor protective circuit as claimed in claim 1, it is characterised in that the feedback module includes second resistance and the
Two diodes；
The input of feedback module described in one end of the second resistance, the other end connection the described 2nd 2 of the second resistance
The anode of pole pipe, the negative electrode of second diode is the output end of the feedback module.
4. compressor protective circuit as claimed in claim 1, it is characterised in that the unlocked state includes 3rd resistor and the
Five NPN type triodes；
The base stage of the 5th NPN type triode connects one end of the 3rd resistor, and the other end of the 3rd resistor is institute
State the control end of unlocked state, the grounded emitter of the 5th NPN type triode, the current collection of the 5th NPN type triode
The output end of extremely described unlocked state.
5. compressor protective circuit as claimed in claim 1, it is characterised in that the unlocked state include the 11st resistance and
6th PNP type triode；
The base stage of the 6th PNP type triode connects one end of the 11st resistance, the other end of the 11st resistance
It is the control end of the unlocked state, the grounded collector of the 6th PNP type triode, the 6th PNP type triode
The output end of the extremely described unlocked state of transmitting.
6. compressor protective circuit as claimed in claim 1, it is characterised in that the compressor protective circuit also includes signal
Shaping Module, the input of the signal shaping module connects the output end of the voltage comparison module, the signal shaping mould
Block output end connects the input and the SPM of the feedback module, and the signal shaping module is to the voltage
The signal of comparison module output is exported to the SPM and feedback module after carrying out Shape correction.
7. compressor protective circuit as claimed in claim 6, it is characterised in that the voltage comparison module includes reference voltage
Generation unit and first comparator, the reference voltage generation unit generate the reference voltage, the voltage comparison module
Input connects the in-phase input end of the first comparator, and the voltage generating unit connects the anti-phase of the first comparator
Input.
8. compressor protective circuit as claimed in claim 7, it is characterised in that the signal shaping module includes the 4th resistance
With the first PNP type triode；
The base stage of first PNP type triode is the input of the signal shaping module, first PNP type triode
Grounded collector, the emitter stage of first PNP type triode is that the signal is whole with the common contact of described 4th resistance one end
The output end of shape module, the 4th resistance other end connects dc source.
9. compressor protective circuit as claimed in claim 7, it is characterised in that the signal shaping module includes the 5th resistance
With the second NPN type triode；
The base stage of second NPN type triode is the input of the signal shaping module, second NPN type triode
Colelctor electrode connects dc source, and the emitter stage of second NPN type triode is institute with the common contact of described 5th resistance one end
State the output end of signal shaping module, the 5th resistance other end ground connection.
10. compressor protective circuit as claimed in claim 6, it is characterised in that the voltage comparison module is included with reference to electricity
Pressure generation unit and the second comparator, the reference voltage generation unit generate the reference voltage, the voltage comparison module
First input end connect the inverting input of second comparator, the voltage generating unit connects second comparator
In-phase input end.
11. compressor protective circuits as claimed in claim 10, it is characterised in that the signal shaping module includes the 6th electricity
Resistance and the 3rd PNP type triode；
The base stage of the 3rd PNP type triode is the input of the signal shaping module, the 3rd PNP type triode
Emitter stage connects dc source, and colelctor electrode and the common contact of described 6th resistance one end of the 3rd PNP type triode are institute
State the output end of signal shaping module, the 6th resistance other end ground connection.
12. compressor protective circuits as claimed in claim 10, it is characterised in that the signal shaping module includes the 7th electricity
Resistance and the 4th NPN type triode；
The base stage of the 4th NPN type triode is the input of the signal shaping module, the 4th NPN type triode
Grounded emitter, the colelctor electrode of the 4th NPN type triode is that the signal is whole with the common contact of described 7th resistance one end
The output end of shape module, the 7th resistance other end connects dc source.
13. compressor protective circuits as claimed in claim 1, it is characterised in that the compressor protective circuit also includes temperature
Degree protection module, the input of the temperature protection module connects the SPM, the temperature protection module it is defeated
Go out the input of the end connection voltage comparison module；
When the SPM temperature is too high, SPM passes through temperature protection module output temperature protection signal
To the input of the voltage comparison module, so that the voltage comparison module output protection signal is to the intelligent power mould
Block, the SPM turns off output current phase to stop the compressor operating according to the protection signal.
14. compressor protective circuits as claimed in claim 13, it is characterised in that the temperature protection module includes the 8th electricity
Resistance, the 9th resistance and the 3rd diode；
One end of 8th resistance is the input of the temperature protection module, the other end of the 8th resistance and described
One end of nine resistance is connected to the anode of the 3rd diode altogether, and the negative electrode of the 3rd diode is the temperature protection module
Output end, the 9th resistance the other end ground connection.
15. compressor protective circuit as described in claim 7 or 10, it is characterised in that the voltage comparison module also includes
Tenth resistance, described tenth resistance one end connects the output end of the voltage comparison module, other end connection dc source.
16. a kind of air-conditioners, it is characterised in that the air-conditioner includes the compressor as described in any one of claim 1 to 15
Protection circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710092163.0A CN106849015A (en) | 2017-02-20 | 2017-02-20 | A kind of compressor protective circuit and air-conditioner |
| PCT/CN2017/082548 WO2018149034A1 (en) | 2017-02-20 | 2017-04-28 | Compressor protection circuit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710092163.0A CN106849015A (en) | 2017-02-20 | 2017-02-20 | A kind of compressor protective circuit and air-conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106849015A true CN106849015A (en) | 2017-06-13 |
Family
ID=59133938
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710092163.0A Pending CN106849015A (en) | 2017-02-20 | 2017-02-20 | A kind of compressor protective circuit and air-conditioner |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106849015A (en) |
| WO (1) | WO2018149034A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565509A (en) * | 2017-10-11 | 2018-01-09 | 安徽衡孚电子科技有限公司 | A kind of delay overcurrent turn-off function circuit for elevator switch power supply |
| CN108809200A (en) * | 2018-08-27 | 2018-11-13 | 龙城电装（常州）有限公司 | Air Condition Compressor for Electric Vehicle PMSM Drive System |
| CN112072616A (en) * | 2020-09-02 | 2020-12-11 | 珠海格力电器股份有限公司 | IPM over-current detection circuit and electric appliance |
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| US4709292A (en) * | 1983-12-23 | 1987-11-24 | Matsushita Electric Industrial Co., Ltd. | Trouble detector apparatus for an air-conditioner including a counter and a timer |
| CN104617544A (en) * | 2014-04-02 | 2015-05-13 | 美的集团股份有限公司 | Air-conditioner and compressor protection circuit thereof |
| CN105932636A (en) * | 2016-06-13 | 2016-09-07 | 国家电网公司 | Overcurrent protection circuit of power-frequency withstand voltage test |
| CN206506284U (en) * | 2017-02-20 | 2017-09-19 | 广东美的制冷设备有限公司 | A kind of compressor protective circuit and air conditioner |
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| JP6238809B2 (en) * | 2014-03-26 | 2017-11-29 | 三菱電機株式会社 | Inverter control circuit |
| CN103944143B (en) * | 2014-04-02 | 2017-06-06 | 美的集团股份有限公司 | A kind of air-conditioner and its compressor demagnetization protection circuit and method |
| CN204965104U (en) * | 2015-09-17 | 2016-01-13 | 广东美的制冷设备有限公司 | Air conditioner and last electricity and current foldback circuit of intelligence power module thereof |
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| US4709292A (en) * | 1983-12-23 | 1987-11-24 | Matsushita Electric Industrial Co., Ltd. | Trouble detector apparatus for an air-conditioner including a counter and a timer |
| CN104617544A (en) * | 2014-04-02 | 2015-05-13 | 美的集团股份有限公司 | Air-conditioner and compressor protection circuit thereof |
| CN105932636A (en) * | 2016-06-13 | 2016-09-07 | 国家电网公司 | Overcurrent protection circuit of power-frequency withstand voltage test |
| CN206506284U (en) * | 2017-02-20 | 2017-09-19 | 广东美的制冷设备有限公司 | A kind of compressor protective circuit and air conditioner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107565509A (en) * | 2017-10-11 | 2018-01-09 | 安徽衡孚电子科技有限公司 | A kind of delay overcurrent turn-off function circuit for elevator switch power supply |
| CN108809200A (en) * | 2018-08-27 | 2018-11-13 | 龙城电装（常州）有限公司 | Air Condition Compressor for Electric Vehicle PMSM Drive System |
| CN112072616A (en) * | 2020-09-02 | 2020-12-11 | 珠海格力电器股份有限公司 | IPM over-current detection circuit and electric appliance |
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| Publication number | Publication date |
|---|---|
| WO2018149034A1 (en) | 2018-08-23 |
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Application publication date: 20170613 |