CN105471363B - The guard method of compressor demagnetization current and system and compressor - Google Patents
The guard method of compressor demagnetization current and system and compressor Download PDFInfo
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Abstract
The present invention discloses a kind of compressor demagnetization current protection system, including temperature information acquisition module, message processing module and control module；Temperature information acquisition module obtains the Current Temperatures information of compressor, and Current Temperatures information is sent to message processing module；Message processing module matches the Current Temperatures information received with the temperature range that prestores, and generates corresponding demagnetization current threshold value according to matching result, and demagnetization current threshold value is sent to control module；Control module obtains the present current value of compressor, and is controlled compressor by present current value and the demagnetization current threshold value comparison received, and according to comparison result.Above system can realize the application to the relatively limits of compressor performance.Invention additionally discloses a kind of compressors and compressor demagnetization current guard method.
Description
Technical field
The present invention relates to Compressor Technology field more particularly to a kind of compressor demagnetization current guard method and system and
Compressor.
Background technology
The motor of frequency-changeable compressor generally uses permanent magnet synchronous motor at present, has efficient, power density greatly and control
The advantages that performance is good.But because using permanent-magnet material, the motor of frequency-changeable compressor also has the shortcomings that permanent magnet demagnetization.It avoids moving back
The measure of magnetic has very much, for frequency-changeable compressor, mainly avoids demagnetizing by limiting compressor three-phase current.In industry
The general maximum running current value allowed with reference to compressor designs corresponding compressor demagnetization current protection circuit, avoids compressing
Machine is in the process of running because permanent magnet demagnetization problem occurs in overcurrent.
With the continuous innovation of permanent-magnet material technology, more and more type permanent-magnet materials are applied to make permanent magnet synchronous electric
The permanent magnet of machine.The temperature characterisitic of different permanent-magnet materials is different so that the demagnetization current of compressor at different temperatures protects point
Also different.The compressor demagnetization current protection circuit of air conditioner industry is convenient for design at present, generally exists only referring to compressor
The minimum value of demagnetization protective current in entire operating temperature section carrys out design protection value.Compressor is allowed in this way in major part
Performance in operating temperature area cannot efficiently use.
Invention content
Based on this, it is necessary to a kind of compressor demagnetization current guard method and system and compressor are provided, for realizing
Application to compressor performance compared with limits.
A kind of compressor demagnetization current protection system, including temperature information acquisition module, message processing module and control mould
Block；The temperature information acquisition module, described information processing module and the control module are sequentially connected；
The temperature information acquisition module is used to obtain the Current Temperatures information of compressor, and described current by what is got
Temperature information is sent to described information processing module；
Described information processing module is used to match the Current Temperatures information received with the temperature range that prestores,
And corresponding demagnetization current threshold value is generated according to matching result, and the demagnetization current threshold value is sent to the control mould
Block；Each temperature range that prestores corresponds to a demagnetization current threshold value；The number of the temperature range that prestores is two
More than；
The control module is used to obtain the present current value of the compressor, and by the present current value with receive
The demagnetization current threshold value comparison, and the compressor is controlled according to comparison result.
In one of the embodiments, described information processing unit according to predetermined coefficient by the demagnetization current threshold transition
For reference voltage, it is sent to the control module；
The present current value of the compressor is converted to sampled voltage by the control module according to the predetermined coefficient, and
The reference voltage and the sampled voltage are compared, and the compressor is controlled according to comparison result.
Described information processing module includes micro-control unit and reference voltage generation unit in one of the embodiments,；
The micro-control unit is stored with multiple preset temperature sections and corresponding with each preset temperature section
Channel number will be corresponding described and according to the matching result of the Current Temperatures information and each preset temperature section
Channel number is sent to the reference voltage generation unit；
The reference voltage generation unit includes channel selecting device and potential circuit, and the channel selecting device is according to institute
Stating channel number makes the potential circuit export the reference voltage to the control module.
The channel selecting device is analog multiplexer chip in one of the embodiments,；The analog-converted is opened
It closes chip and is provided with more than two switching channels, each switching channels correspond to a channel number；
The potential circuit includes the multiple first resistors being sequentially connected in series between the first power supply and ground, and arbitrary neighborhood
The connecting pins of two first resistors connect with the switching channels.
The control module is generated when the sampled voltage is more than the reference voltage in one of the embodiments,
Control the control signal that the compressor executes the first operation.
The control module includes sampled voltage acquiring unit and voltage comparison unit in one of the embodiments,；
The sampled voltage acquiring unit is used to the present current value of the compressor being converted to the sampled voltage, and
The sampled voltage is sent to the voltage comparison unit；
The voltage comparison unit is connect with described information processing module to receive the reference voltage；The voltage compares
Unit is used to by the reference voltage compared with the sampled voltage, generate when the sampled voltage is more than the reference voltage
The control compressor executes the control signal of the first operation.
The voltage comparison unit is differential comparator in one of the embodiments,；The same phase of the differential comparator
Input terminal is connect with the sampled voltage acquiring unit, inverting input and the described information processing module of the differential comparator
Connection.
The sampled voltage acquiring unit includes sampling resistor in one of the embodiments,；The of the sampling resistor
One end is grounded, the second termination compressor current output end；The second end of the sampling resistor is also more single with the voltage
Member connection；The sampled voltage is the corresponding voltage of second end of the sampling resistor.
The sampled voltage acquiring unit is inductance mutual inductor or current Hall sensor in one of the embodiments,.
First operation includes being stopped in one of the embodiments,.
A kind of compressor, including the compressor demagnetization current protection system described in any one of the above.
A kind of compressor demagnetization current guard method, includes the following steps：
Obtain the Current Temperatures information of compressor；
The Current Temperatures information is matched with the temperature range that prestores, and corresponding demagnetization current is obtained according to matching result
Threshold value；Each temperature range that prestores corresponds to a demagnetization current threshold value；The number of the temperature range that prestores is two
More than a；
By the demagnetization current threshold value compared with the present current value of the compressor, and according to comparison result to the pressure
Contracting machine is controlled.
It is according to the method that comparison result controls the compressor in one of the embodiments,：
When the present current value is more than the demagnetization current threshold value, generates and control first operation of compressor execution
Control signal.
First operation includes being stopped in one of the embodiments,.
In one of the embodiments,
The guard method of above-mentioned compressor demagnetization current and system and compressor, by the operating temperature interval division of compressor
It prestores temperature range for two or more, by detecting the Current Temperatures of compressor, determines that compressor Current Temperatures are corresponding default
Temperature range, then by the corresponding demagnetization current threshold value in the preset temperature section compared with the present current value of compressor, and root
Compressor is controlled according to comparison result, realizes and the demagnetization current of compressor is protected.Above-mentioned compressor demagnetization current is protected
Different demagnetization current threshold values is arranged in different temperatures section for method and system and compressor, therefore can realize to compression
The application of the relatively limits of machine performance.
Description of the drawings
Fig. 1 is the structural schematic diagram that compressor demagnetization current of the present invention protects system one embodiment；
Fig. 2 is the structural representation for the message processing module that compressor demagnetization current of the present invention is protected in system one embodiment
Figure；
Fig. 3 is the structural schematic diagram for the control module that compressor demagnetization current of the present invention is protected in system one embodiment；
Fig. 4 is the circuit diagram in compressor demagnetization current of the present invention protection system one embodiment；
Fig. 5 is that compressor demagnetization current of the present invention protects the demagnetization current characteristic in system one embodiment to become in positive temperature
The current protection curve synoptic diagram of the compressor of change；
Fig. 6 is the flow diagram of compressor demagnetization current guard method one embodiment of the present invention.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, the present invention is compressed below in conjunction with attached drawing
The guard method of machine demagnetization current and system and the specific implementation mode of compressor illustrate.It should be appreciated that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
Referring to Fig. 1, in one embodiment, it may include temperature information acquisition module that compressor demagnetization current, which protects system,
100, message processing module 200 and control module 300.Temperature information acquisition module 100, message processing module 200 and control mould
Block 300 is sequentially connected.Temperature information acquisition module 100 is used to obtain the Current Temperatures information of compressor, and works as what is got
Preceding temperature information is sent to message processing module 200.Message processing module 200 for will the Current Temperatures information that receive with it is pre-
It deposits temperature range to be matched, and corresponding demagnetization current threshold value is generated according to matching result, and demagnetization current threshold value is sent out
It send to control module 300.Control module 300 is used to obtain the present current value of compressor, and by present current value with receive
Demagnetization current threshold value comparison, and compressor is controlled according to comparison result.
Wherein, the number for the temperature range that prestores is two or more, and all temperature ranges that prestores constitute the work of compressor
Temperature range.The operating temperature section of compressor can be divided into more than two temperature ranges that prestore in advance.Each prestore
Temperature range corresponds to a demagnetization current threshold value.The demagnetization current threshold value can be demagnetization of the compressor in the temperature range that prestores
The minimum value of protective current.The demagnetization current threshold value can be obtained by experiment.
It, can for ease of the present current value of demagnetization current threshold value and compressor to be compared below in each embodiment
The present current value of demagnetization current threshold value and compressor is converted to voltage respectively, then it is compared again.Specifically, information
Processing unit 200 can according to predetermined coefficient by demagnetization current threshold transition be reference voltage, be then forwarded to control module
300.The present current value of compressor can also be converted to sampled voltage by control module 300 according to the predetermined coefficient, then will
Reference voltage and sampled voltage compare, and are controlled compressor according to comparison result.
Referring to Fig. 2, in one embodiment, message processing module 200 may include micro-control unit 210 and reference voltage life
At unit 220.Micro-control unit 210 is stored with multiple preset temperature sections and channel corresponding with each preset temperature section
Number.In the present embodiment, each channel number corresponds to a reference voltage.The Current Temperatures information that micro-control unit 210 will receive
It is matched with each preset temperature section, and corresponding channel number is sent to by reference voltage generation unit according to matching result
220.For example, if preceding temperature information is located in one of preset temperature section, Current Temperatures information and the preset temperature section
Successful match.
Referring to Fig. 4, in one embodiment, reference voltage generation unit 220 may include channel selecting device 221 and voltage
Circuit 222.Channel selecting device 221 makes potential circuit 222 export reference voltage corresponding with channel number according to channel number.As
A kind of embodiment, channel selecting device 221 can be analog multiplexer chip.Analog multiplexer chip can be arranged
There are two above switching channels, and each switching channels correspond to a channel number.Potential circuit 222 may include being sequentially connected in series
Multiple first resistors between the first power supply and ground.And the connecting pin of two first resistors of arbitrary neighborhood is switched with one
Channel is correspondingly connected with.
Referring to Fig. 4, potential circuit 222 includes 9 first resistor R2 to R9 and R1 being sequentially connected in series.The other end of R2 and
One power supply connects, the other end ground connection of R1.Analog multiplexer chip has 8 switching channels.Two neighboring first resistor
Connecting pin is connect with the switching channels of analog multiplexer chip.It should be noted that the resistance value of each first resistor can phase
Together, it can also be different, need to be determined according to practical application.
Specifically, the demagnetization current characteristic of compressor can be in positive temperature change, can also be in negative temperature variation.This reality
It applies in example, is illustrated so that the demagnetization current characteristic of compressor is in positive temperature change as an example.It, can in one embodiment referring to Fig. 5
With the requirement of the design application of combination product first, minimum demagnetization protection electricity of the extraction compressor corresponding to each temperature range
Stream.Wherein, minimum demagnetization protective current is aforementioned demagnetization current threshold value.Then pass through resistance of the calculating to first resistor R1~R9
Value is reasonably selected so that the potential circuit trigger current value corresponding to each switching channels of analog multiplexer chip
Demagnetization current threshold values of the IP0~IP7 with compressor in eight temperature ranges of TC0~TC7 is mapped.
Referring to Fig. 4, when analog multiplexer chip receives the channel number of the transmission of micro-control unit 210, analog-converted
Switch chip will switching channels corresponding with the channel number it is open-minded, the output end of analog multiplexer chip is to control module 300
Export corresponding reference voltage.For example, the voltage of the first power supply is VCC.If micro-control unit 210 is to analog multiplexer chip
Sendaisle number 0, then analog multiplexer is open-minded by switching channels 0.At this point, the reference of the output end output of analog multiplexer
Voltage is the voltage at the both ends first resistor R1, i.e. R1*VCC/ (R1+ ...+R9).If micro-control unit 210 is to analog multiplexer
Chip sendaisle number 2, then analog multiplexer is open-minded by switching channels 2.At this point, the output end output of analog multiplexer
Reference voltage is the voltage at both ends after first resistor R1, R8 and R9 series connection, i.e. (R1+R8+R9) * VCC/ (R1+ ...+R9).
In one embodiment, micro-control unit 210 is connect with the selection control terminal of analog multiplexer chip.Analog-converted
Switch chip is by selecting control terminal to receive the channel number that micro-control unit 210 inputs.For example, analog multiplexer chip has
Eight switching channels, it, which selects control terminal, at this time to be three.Micro-control unit 210 to each selection control terminal by sending
Logic 1 or 0, to complete to analog multiplexer chip sendaisle number.Three selection control terminals receive micro-control unit 210
After the logic 1 or 0 of transmission, three logics 1 or 0 are combined according to preset order, forms a two level corresponding with switching channels
System number.
As a kind of embodiment, control module 300 can be raw when the sampled voltage got is more than reference voltage
The control signal that the first operation is executed at control compressor, accordingly to be controlled compressor.Wherein, the first operation can be right
It should be and be stopped.
Referring to Fig. 3, in one embodiment, control module 300 may include that sampled voltage acquiring unit 310 and voltage compare
Unit 320.Sampled voltage acquiring unit 310 is used to the present current value of compressor being converted to sampled voltage, and will sampling electricity
Pressure is sent to voltage comparison unit 320.Voltage comparison unit 320 is connect with message processing module 200 to receive reference voltage.Electricity
It presses comparing unit 320 to be used for by reference voltage compared with sampled voltage, control letter is generated when sampled voltage is more than reference voltage
Number.The control signal can be exported from current protection signal output end shown in Fig. 4 to compressor.
Referring to Fig. 4, specifically, voltage comparison unit 320 can be differential comparator.The in-phase input end of differential comparator
It is connect with sampled voltage acquiring unit 310, to receive sampled voltage.The inverting input and message processing module of differential comparator
200 output end connection, to receive the reference voltage of the output of message processing module 200.In the ginseng that message processing module 200 exports
When examining voltage more than sampled voltage, differential comparator exports low level.Increase in the current flow of compressor, so that sampling electricity
When pressure is more than the reference voltage that message processing module 200 exports, the output of differential comparator becomes high level from low level.This
When, the output signal of differential comparator can export the IPM (intelligence connected as compressor by the variation of low level to high level
Power module) or control device.IPM or control device control compressor execute the first operation, such as are stopped.
Referring to Fig. 4, in one embodiment, sampled voltage acquiring unit 310 may include sampling resistor R.Sampling resistor R's
First end is grounded, the second termination compressor current output end.The current flow of compressor is exported by compressor current output end,
Sampled voltage is generated after sampling resistor.The second end of sampling resistor R is also connect with voltage comparison unit 320.In this way, this is adopted
Sample voltage can be directly inputted to voltage comparison unit 320.In addition, sampled voltage acquiring unit 310 can also include rectification
Other electronic devices such as capacitance.In other embodiments, sampled voltage acquiring unit 310 can also be inductance mutual inductor or electric current
Hall sensor.
Furthermore it is possible to obtain the temperature information of compressor by temperature sensor, can also push away indirectly by other means
The temperature information of compressor is calculated, it is without limitation.
Above-mentioned compressor demagnetization current protects system, is that two or more prestores temperature by the operating temperature interval division of compressor
Section is spent, by detecting the Current Temperatures of compressor, the corresponding preset temperature section of compressor Current Temperatures is determined, then should
The corresponding demagnetization current threshold value in preset temperature section is compared with the present current value of compressor, and according to comparison result to compressor
It is controlled.Above-mentioned compressor demagnetization current protects system, and different demagnetization current threshold values is arranged in different temperatures section, can
Realize the application to the relatively limits of compressor performance.
In one embodiment, compressor includes any one of the above compressor demagnetization current protection system, and with above-mentioned
Advantage possessed by compressor demagnetization current protection system.
Based on unified inventive concept, the present invention also proposes that a kind of compressor demagnetization current guard method, this method can lead to
It crosses above-mentioned compressor demagnetization current protection system to be implemented, therefore overlaps will not be repeated.Referring to Fig. 6, in one embodiment,
Compressor demagnetization current guard method may comprise steps of：
S100 obtains the Current Temperatures information of compressor.
In one embodiment, the temperature information of compressor can be obtained by temperature sensor, can also pass through its other party
Formula extrapolates the temperature information of compressor indirectly, without limitation.
S200 matches Current Temperatures information with the temperature range that prestores, and obtains corresponding demagnetization electricity according to matching result
Flow threshold value.
Wherein, the temperature range that each prestores corresponds to a demagnetization current threshold value.The number for the temperature range that prestores be two with
On.All temperature ranges that prestores constitute the operating temperature section of compressor.It can be advance by the operating temperature section of compressor
It is divided into more than two temperature ranges that prestore.Each temperature range that prestores corresponds to a demagnetization current threshold value.The demagnetization current
Threshold value can be minimum value of the compressor in the demagnetization protective current of the temperature range that prestores.The demagnetization current threshold value can pass through
Experiment obtains.
In the present embodiment, can be by the matched method of the present current value of demagnetization current threshold value and compressor：If preceding temperature
Degree information is located in one of preset temperature section, then Current Temperatures information and the preset temperature section successful match.
Can be according to actual needs eight by the operating temperature interval division of compressor in one embodiment referring to Fig. 5
A temperature range that prestores.Specifically, the requirement of application can be designed with combination product, extraction compressor is right in each temperature range institute
The minimum demagnetization protective current answered.Wherein, minimum demagnetization protective current is aforementioned demagnetization current threshold value.
S300, by demagnetization current threshold value compared with the present current value of compressor, and according to comparison result to compressor into
Row control.
In one embodiment, can be according to the method that comparison result controls compressor：It is big in present current value
When demagnetization current threshold value, the control signal that control compressor executes the first operation is generated.The IPM or control device root of compressor
The first operation is executed according to control signal control compressor.For example, the first operation can be to be stopped.In addition, the first operation
Or compressor is with lower performance.
In addition, in other embodiments, the present current value of demagnetization current threshold value and compressor can also be converted respectively
Compare for voltage and then by the corresponding voltage value of demagnetization current threshold value voltage value corresponding with the present current value of compressor
Compared with.
The operating temperature interval division of compressor is that two or more prestores temperature by above-mentioned compressor demagnetization current guard method
Section is spent, by detecting the Current Temperatures of compressor, the corresponding preset temperature section of compressor Current Temperatures is determined, then should
The corresponding demagnetization current threshold value in preset temperature section is compared with the present current value of compressor, and according to comparison result to compressor
It is controlled.Different demagnetization current threshold values is arranged in different temperatures section for above-mentioned compressor demagnetization current guard method, can
Realize the application to the relatively limits of compressor performance.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (13)
1. a kind of compressor demagnetization current protects system, which is characterized in that at temperature information acquisition module (100), information
Manage module (200) and control module (300)；The temperature information acquisition module (100), described information processing module (200) and
The control module (300) is sequentially connected；
The temperature information acquisition module (100) is used to obtain the Current Temperatures information of compressor, and works as described in getting
Preceding temperature information is sent to described information processing module (200)；
Described information processing module (200) is used for the Current Temperatures information received and the temperature range progress that prestores
Match, and corresponding demagnetization current threshold value is generated according to matching result, and the demagnetization current threshold value is sent to the control
Module (300)；Each temperature range that prestores corresponds to a demagnetization current threshold value；The demagnetization current threshold value is compression
Minimum value of the machine in the demagnetization protective current of the temperature range that prestores；The number of the temperature range that prestores is two or more；
Described information processing module (200) includes micro-control unit (210) and reference voltage generation unit (220), the micro-control
Unit (210) processed is stored with multiple prestore temperature range and the channel numbers corresponding with each temperature range that prestores, and
According to the matching result of the Current Temperatures information and each temperature range that prestores, the corresponding channel number is sent to
The reference voltage generation unit (220)；
The reference voltage generation unit (220) includes channel selecting device (221) and potential circuit (222)；The channel choosing
Select device (221) makes the potential circuit (222) to the control module (300) output reference voltage according to the channel number,
Wherein, the channel selecting device (221) is analog multiplexer chip, and the analog multiplexer chip is controlled by selecting
End receives the channel number that micro-control unit (210) inputs；
The control module (300) is used to obtain the present current value of the compressor, and by the present current value and receives
The demagnetization current threshold value comparison arrived, and the compressor is controlled according to comparison result.
2. compressor demagnetization current according to claim 1 protects system, which is characterized in that described information processing module
(200) it is reference voltage by the demagnetization current threshold transition according to predetermined coefficient, is sent to the control module (300)；
The present current value is converted to sampled voltage by the control module (300) according to the predetermined coefficient, and will be described
Reference voltage and the sampled voltage compare, and are controlled the compressor according to comparison result.
3. compressor demagnetization current according to claim 2 protects system, which is characterized in that the analog multiplexer core
Piece is provided with more than two switching channels, and each switching channels correspond to a channel number；
The potential circuit (222) includes the multiple first resistors being sequentially connected in series between the first power supply and ground, and arbitrary neighborhood
The connecting pins of two first resistors connect with the switching channels.
4. compressor demagnetization current according to claim 2 protects system, which is characterized in that the control module (300)
When the sampled voltage is more than the reference voltage, generates and control the control signal that the compressor executes the first operation.
5. compressor demagnetization current according to claim 4 protects system, which is characterized in that the control module (300)
Including sampled voltage acquiring unit (310) and voltage comparison unit (320)；
The sampled voltage acquiring unit (310) is used to the present current value of the compressor being converted to the sampled voltage,
And the sampled voltage is sent to the voltage comparison unit (320)；
The voltage comparison unit (320) connect with described information processing module (200) to receive the reference voltage；The electricity
It presses comparing unit (320) to be used for by the reference voltage compared with the sampled voltage, is more than the ginseng in the sampled voltage
The control signal that the control compressor executes the first operation is generated when examining voltage.
6. compressor demagnetization current according to claim 5 protects system, which is characterized in that the voltage comparison unit
(320) it is differential comparator；The in-phase input end of the differential comparator is connect with the sampled voltage acquiring unit (310),
The inverting input of the differential comparator is connect with described information processing module (200).
7. compressor demagnetization current according to claim 5 protects system, which is characterized in that the sampled voltage obtains single
First (310) include sampling resistor；The first end of the sampling resistor is grounded, the second termination compressor current output end；Institute
The second end for stating sampling resistor is also connect with the voltage comparison unit (320)；The sampled voltage is the sampling resistor
The corresponding voltage of second end.
8. compressor demagnetization current according to claim 5 protects system, which is characterized in that the sampled voltage obtains single
First (310) are inductance mutual inductor or current Hall sensor.
9. compressor demagnetization current according to claim 4 protects system, which is characterized in that first operation includes stopping
Only work.
10. a kind of compressor, which is characterized in that including the compressor demagnetization current protection described in claim 1 to 9 any one
System.
11. a kind of compressor demagnetization current guard method, which is characterized in that include the following steps：
Obtain the Current Temperatures information of compressor；
The Current Temperatures information is matched with the temperature range that prestores, and corresponding demagnetization current threshold is obtained according to matching result
Value；Each temperature range that prestores corresponds to a demagnetization current threshold value；The demagnetization current threshold value is compressor in institute
State the minimum value of the demagnetization protective current for the temperature range that prestores；The number of the temperature range that prestores is two or more, including：
Pre-stored multiple prestore temperature range and the channel numbers corresponding with each temperature range that prestores are obtained, and
According to the matching result of the Current Temperatures information and each temperature range that prestores, the corresponding channel number is obtained；
According to predetermined coefficient by the demagnetization current threshold transition be reference voltage, according to the channel number output it is described with reference to electricity
Pressure；
By the demagnetization current threshold value compared with the present current value of the compressor, and according to comparison result to the compressor
It is controlled, including：
The present current value is converted into sampled voltage according to the predetermined coefficient, and by the reference voltage and the sampling
Voltage compares, and is controlled the compressor according to comparison result.
12. compressor demagnetization current guard method according to claim 11, which is characterized in that according to comparison result to institute
Stating the method that compressor is controlled is：
When the present current value is more than the demagnetization current threshold value, generates and control the control that the compressor executes the first operation
Signal processed.
13. compressor demagnetization current guard method according to claim 12, which is characterized in that it is described first operation include
It is stopped.
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| CN105822535B (en) * | 2016-04-19 | 2018-06-29 | 广东美的制冷设备有限公司 | Control method, device and the air conditioner of compressor |
| CN106762587B (en) * | 2017-01-06 | 2018-08-17 | 广东美的制冷设备有限公司 | The adjusting method of compressor rotary speed, device and air conditioner under low temperature |
| CN111780380A (en) * | 2020-06-15 | 2020-10-16 | 珠海格力电器股份有限公司 | Method and device for controlling running state of compressor |
| CN113422348B (en) * | 2021-06-08 | 2023-06-27 | 浙江大学 | Temperature limit value determining method, permanent magnet synchronous motor control method and device |
| CN115143593A (en) * | 2022-06-27 | 2022-10-04 | 北京小米移动软件有限公司 | Method and device for determining inductance parameter of air conditioner compressor and storage medium |
| CN115664302B (en) * | 2022-12-14 | 2023-03-10 | 新誉轨道交通科技有限公司 | Motor controller demagnetization protection method and system and vehicle |
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| CN104566826A (en) * | 2014-12-31 | 2015-04-29 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner, method and device of controlling compressor |
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| US5875641A (en) * | 1997-09-26 | 1999-03-02 | Siemens Energy & Automation, Inc. | Contactor with solid state protection circuit for a vapor compression air conditioner |
| CN202424134U (en) * | 2012-02-24 | 2012-09-05 | 珠海格力电器股份有限公司 | Compressor demagnetization protection circuit and air conditioner |
| CN203026916U (en) * | 2012-12-12 | 2013-06-26 | 安徽美芝精密制造有限公司 | Demagnetization-preventing protection device of compressor |
| CN103944143A (en) * | 2014-04-02 | 2014-07-23 | 美的集团股份有限公司 | Air conditioner and compressor demagnetization protection circuit and method thereof |
| CN104566826A (en) * | 2014-12-31 | 2015-04-29 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner, method and device of controlling compressor |
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