CN104811023A - Variable frequency air conditioner compressor counter electromotive force protection circuit - Google Patents
Variable frequency air conditioner compressor counter electromotive force protection circuit Download PDFInfo
- Publication number
- CN104811023A CN104811023A CN201410039704.XA CN201410039704A CN104811023A CN 104811023 A CN104811023 A CN 104811023A CN 201410039704 A CN201410039704 A CN 201410039704A CN 104811023 A CN104811023 A CN 104811023A
- Authority
- CN
- China
- Prior art keywords
- electromotive force
- protective circuit
- voltage
- protection circuit
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
- H02P3/22—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor by short-circuit or resistive braking
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Air Conditioning Control Device (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a variable frequency air conditioner compressor counter electromotive force protection circuit. According to the variable frequency air conditioner compressor counter electromotive force protection circuit, an IPM module is connected in parallel with a protection circuit; when a compressor stops or is powered off instantly, the real-time power supply voltage of the IPM module is the sum of power supply voltage in a normal state and a counter electromotive force; when the real-time power supply voltage is larger than the value of voltage at two ends of an electrolytic capacitor, a diode on the protection circuit is turned on, so that the electrolytic capacitor is charged; and when the real-time power supply voltage is smaller than the value of the voltage at the two ends of the electrolytic capacitor, the diode on the protection circuit is not turned on, and the electrolytic capacitor performs discharging on a power consumption element on the protection circuit. The electrolytic capacitor can be charged, so that the counter electromotive force of the compressor can be absorbed, and therefore, the value of voltage at two ends of the IPM module can be limited to a low-voltage-value range; overvoltage protection is realized based on the cooperation of the small-sized electrolytic capacitor and the diode, and the size and capacitance value of the electrolytic capacitor are both small, and therefore, the structure of the protection circuit can be simplified, and production cost and use cost can be decreased.
Description
Technical field
The invention belongs to transducer air conditioning technical field, be specifically related to a kind of frequency converting air-conditioner compressor back electromotive force protective circuit.
Background technology
Convertible frequency air-conditioner has selected frequency conversion dedicated compressor on the basis of common air-conditioning, adds frequency-changing control system.Its basic structure is identical with common air-conditioning with refrigeration principle.Convertible frequency air-conditioner with its have energy-conservation, noise is low, accuracy of temperature control is high, temperature adjustment speed is fast and can keep that the advantages such as room temperature is constant are in the field of business to be used widely.
Day by day universal along with convertible frequency air-conditioner, to convertible frequency air-conditioner Controller gain variations structure size and price request more and more higher.
In AC-DC-AC convertible frequency air-conditioner, variable frequency air-conditioner controller generally comprises AC power, rectifier bridge and IPM module (Intelligent Power Module) the i.e. Intelligent Power Module of connecting successively, and IPM module is electrically connected with compressor, in order to drive compressor; When compressor stops moment or the unexpected power-off of air-conditioning, in compressor coil, electric current cannot instantaneously be released, thus forms inverse electromotive force, this inverse electromotive force and compressor operating current value direct proportionality.When the unexpected power-off of compressor high frequency running air-conditioning, compressor inverse electromotive force can be very high, IGBT can be driven to cause damage to frequency-changeable compressor.
Prior art discloses " inductive load control protection electric circuit (patent No.: 201220006012.1) ", " this protective circuit is provided with power-supply controller of electric, power-supply controller of electric is connected to programmable logic controller (PLC), first power supply, second source and inductive load, and inductive load is parallel with protective circuit, protective circuit is provided with the first electric capacity being parallel to inductive load, power-supply controller of electric is provided with the first controller and second controller, and the first power supply and second source are connected to the first controller and second controller, make the first controller of power-supply controller of electric and second controller by the first power supply or second source conducting to inductive load, or allow the first power supply and second source and inductive load be open circuit shape, and the transient state back electromotive force that inductive load makes two ends produce because of power turn-on or open circuit, the voltage of the first electric capacity two end is allowed to change and then to charge, reduce the electric current in circuit, with the contact avoiding transient state back electromotive force to damage power-supply controller of electric, guarantee useful life and the stability of a system of relay or switch." when disclosing the power supply utilizing protective circuit and power-supply controller of electric switch load inductance in this patent; the transient state back electromotive force that loading inductance can be avoided to produce damages the contact of power-supply controller of electric, guarantees useful life and the stability of a system of relay or switch.But this protective circuit uses large electrochemical capacitor to carry out back electromotive force protection, electric capacity volume is comparatively large, and structure is relatively complicated, and capacitance is higher, produce and use cost higher.
Therefore; in view of above problem; be necessary to propose a kind of frequency converting air-conditioner compressor back electromotive force protective circuit; can realize carrying out absorption protection to the inverse electromotive force of compressor by arranging protective circuit; reduce volume and the capacitor's capacity of protective circuit; simplify protective circuit structure, reduce and produce and use cost.
Summary of the invention
In view of this; the invention provides a kind of frequency converting air-conditioner compressor back electromotive force protective circuit, can realize carrying out absorption protection to the inverse electromotive force of compressor by arranging protective circuit, reducing volume and the capacitor's capacity of protective circuit; simplify protective circuit structure, reduce and produce and use cost.
A kind of frequency converting air-conditioner compressor back electromotive force protective circuit that object according to the present invention proposes, be arranged on the controller of convertible frequency air-conditioner, described controller comprises AC power, rectifier bridge and the IPM module of connecting successively, and described IPM module is electrically connected with compressor, in order to drive described compressor; Described IPM module is arranged in parallel protective circuit, described protective circuit has been provided with diode and electrochemical capacitor, described electrochemical capacitor has also been arranged in parallel at least one consuming components.
Preferably, the capacitance of described electrochemical capacitor is 90-110uF.
Preferably, described consuming components is resistance or heating wire.
Preferably, the resistance value of described consuming components is 20-30K Ω.
Preferably, when normally working, the supply power voltage of described IPM module is 1.414 times of described AC power input voltage.
Preferably, the voltage at described electrochemical capacitor two ends is 1.414 times of described AC power maximum input voltage.
Compared with prior art, the advantage of a kind of frequency converting air-conditioner compressor back electromotive force protective circuit disclosed by the invention is: by parallel connection protection circuit in IPM module, when compressor stop instantaneously or power-off time, the real-time supply power voltage of IPM module is voltage value under normal condition and inverse electromotive force value sum, when this real-time supply power voltage is greater than the magnitude of voltage at electrochemical capacitor two ends, diode current flow in protective circuit, electrochemical capacitor is charged, when this real-time supply power voltage is less than the magnitude of voltage at electrochemical capacitor two ends, diode not conducting in protective circuit, electrochemical capacitor discharges to the consuming components in protective circuit.By can realize the absorption to compressor inverse electromotive force to the charging of electrochemical capacitor, thus ensure that the magnitude of voltage at IPM module two ends is limited within lower scope, avoid the damage causing components and parts.And this invention adopts less electrochemical capacitor to coordinate with diode and carry out overvoltage protection, electrochemical capacitor volume and capacitance are all less, simplification protective circuit structure, reduction production and use cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of frequency converting air-conditioner compressor back electromotive force protective circuit disclosed by the invention.
The title of the numeral in figure or the corresponding component representated by letter:
1, AC power 2, rectifier bridge 3, diode 4, resistance 5, electrochemical capacitor 6, IPM module 7, compressor
Embodiment
When compressor stops moment or the unexpected power-off of air-conditioning, in compressor coil, electric current cannot instantaneously be released, thus forms inverse electromotive force, and compressor inverse electromotive force can be very high, IGBT can be driven to cause damage to frequency-changeable compressor.The transient state back electromotive force loading inductance can being avoided to produce about " inductive load control protection electric circuit " disclosed in prior art damages the contact of power-supply controller of electric; but this protective circuit uses large electrochemical capacitor to carry out back electromotive force protection; electric capacity volume is larger; structure is relatively complicated; and capacitance is higher, produce and use cost higher.
The present invention is directed to deficiency of the prior art; provide a kind of frequency converting air-conditioner compressor back electromotive force protective circuit; to coordinate with diode by adopting little electrochemical capacitor and carry out overvoltage protection; can realize carrying out absorption protection to the inverse electromotive force of compressor; reduce volume and the capacitor's capacity of protective circuit; simplify protective circuit structure, reduce and produce and use cost.
A kind of frequency converting air-conditioner compressor back electromotive force protective circuit that object according to the present invention proposes, be arranged on the controller of convertible frequency air-conditioner, described controller comprises AC power, rectifier bridge and the IPM module of connecting successively, and described IPM module is electrically connected with compressor, in order to drive described compressor; Described IPM module is arranged in parallel protective circuit, described protective circuit has been provided with diode and electrochemical capacitor, described electrochemical capacitor has also been arranged in parallel at least one consuming components.
Preferably, the capacitance of described electrochemical capacitor is 90-110uF.
Preferably, described consuming components is resistance or heating wire.
Preferably, the resistance value of described consuming components is 20-30K Ω.
Preferably, when normally working, the supply power voltage of described IPM module is 1.414 times of described AC power input voltage.
Preferably, the voltage at described electrochemical capacitor two ends is 1.414 times of described AC power maximum input voltage.
To be clearly and completely described technical scheme of the present invention by embodiment below.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, Fig. 1 is the structural representation of a kind of frequency converting air-conditioner compressor back electromotive force protective circuit disclosed by the invention.As shown in the figure, a kind of frequency converting air-conditioner compressor back electromotive force protective circuit, is arranged on the controller of convertible frequency air-conditioner, and controller comprises AC power 1, rectifier bridge 2 and IPM module 6, the IPM module 6 of connecting successively and is electrically connected with compressor 7, controls compressor operation.
IPM module is arranged in parallel protective circuit, when the unexpected power-off of air-conditioning, absorption process has been carried out to the inverse electromotive force of compressor, realizes overvoltage protection, avoid the damage to components and parts on controller.
Protective circuit is provided with diode 3 and electrochemical capacitor 5, electrochemical capacitor has also been arranged in parallel at least one consuming components, by arranging electrochemical capacitor to realize the object absorbed at the inverse electromotive force of shutdown transient to compressor.The electric discharge of electrochemical capacitor is realized by arranging consuming components.Wherein, consuming components can be resistance 4 or heating wire etc., or the two is arranged simultaneously, and the resistance value of consuming components is 20-30K Ω.Specifically determine as required, do not limit at this.
The capacitance of electrochemical capacitor is 100uF.The capacitance of the electrochemical capacitor that the present invention uses is relatively little, small volume, uses Master Cost lower, reduces production and use cost.Wherein capacitance also can be 90uF or 110uF etc., and concrete size does not limit.
During normal work, the supply power voltage of IPM module 6 is 1.414 times of AC power 1 input voltage (Vin).
The voltage at electrochemical capacitor 5 two ends is 1.414 times of AC power 1 maximum input voltage.
Operation principle of the present invention is as follows:
AC power 1 input voltage (Vin), Vin exports after carrying out halfwave rectifier by rectifier bridge 2 | Vin|, during normal work, the supply power voltage of IPM module 6 is Vin*1.414, electrochemical capacitor 5 both end voltage is Vin(max) * 1.414, when compressor stops suddenly, there is no diode 3, during the protective circuit that electrochemical capacitor 5 and consuming components form, the real-time supply power voltage of IPM module is Vin*1.414+Vrev(Vrev is reverse voltage), in interpolation by diode 3, after the protective circuit that electrochemical capacitor 5 and consuming components form, during compressor 7 power-off suddenly, IPM module 6 in real time supply power voltage is Vin*1.414+Vrev, as Vin*1.414+Vrev>Vin(max) * 1.414 time, diode 3 conducting in protective circuit, electrochemical capacitor 5 is charged, as Vin*1.414+Vrev<Vin(max) * 1.414 time, diode 3 not conducting in protective circuit, electrochemical capacitor 5 pairs of resistance 4 discharge, by the charging to electrochemical capacitor 5, compressor reverse voltage is absorbed, thus IPM module both end voltage is limited within lower scope.
The invention discloses a kind of frequency converting air-conditioner compressor back electromotive force protective circuit, by parallel connection protection circuit in IPM module, when compressor stop instantaneously or power-off time, the real-time supply power voltage of IPM module is voltage value under normal condition and inverse electromotive force value sum, when this real-time supply power voltage is greater than the magnitude of voltage at electrochemical capacitor two ends, diode current flow in protective circuit, electrochemical capacitor is charged, when this real-time supply power voltage is less than the magnitude of voltage at electrochemical capacitor two ends, diode not conducting in protective circuit, electrochemical capacitor discharges to the consuming components in protective circuit.By can realize the absorption to compressor inverse electromotive force to the charging of electrochemical capacitor, thus ensure that the magnitude of voltage at IPM module two ends is limited within lower scope, avoid the damage causing components and parts.And this invention adopts less electrochemical capacitor to coordinate with diode and carry out overvoltage protection, electrochemical capacitor volume and capacitance are all less, simplification protective circuit structure, reduction production and use cost.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a frequency converting air-conditioner compressor back electromotive force protective circuit, is arranged on the controller of convertible frequency air-conditioner, and described controller comprises AC power, rectifier bridge and the IPM module of connecting successively, and described IPM module is electrically connected with compressor, in order to drive described compressor; It is characterized in that, described IPM module has been arranged in parallel protective circuit, described protective circuit has been provided with diode and electrochemical capacitor, described electrochemical capacitor has also been arranged in parallel at least one consuming components.
2. frequency converting air-conditioner compressor back electromotive force protective circuit according to claim 1, is characterized in that, the capacitance of described electrochemical capacitor is 90-110uF.
3. frequency converting air-conditioner compressor back electromotive force protective circuit according to claim 1, is characterized in that, described consuming components is resistance or heating wire.
4. frequency converting air-conditioner compressor back electromotive force protective circuit according to claim 3, is characterized in that, the resistance value of described consuming components is 20-30K Ω.
5. frequency converting air-conditioner compressor back electromotive force protective circuit according to claim 1, is characterized in that, when normally working, the supply power voltage of described IPM module is 1.414 times of described AC power input voltage.
6. frequency converting air-conditioner compressor back electromotive force protective circuit according to claim 1, is characterized in that, the voltage at described electrochemical capacitor two ends is 1.414 times of described AC power maximum input voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410039704.XA CN104811023A (en) | 2014-01-27 | 2014-01-27 | Variable frequency air conditioner compressor counter electromotive force protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410039704.XA CN104811023A (en) | 2014-01-27 | 2014-01-27 | Variable frequency air conditioner compressor counter electromotive force protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104811023A true CN104811023A (en) | 2015-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410039704.XA Pending CN104811023A (en) | 2014-01-27 | 2014-01-27 | Variable frequency air conditioner compressor counter electromotive force protection circuit |
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| CN (1) | CN104811023A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492878A (en) * | 2017-09-11 | 2017-12-19 | 广东美的制冷设备有限公司 | SPM and controller of air conditioner |
| CN107492879A (en) * | 2017-09-11 | 2017-12-19 | 广东美的制冷设备有限公司 | SPM and controller of air conditioner |
| CN108400744A (en) * | 2018-03-28 | 2018-08-14 | 深圳还是威健康科技有限公司 | A kind of motor drive circuit and smart machine |
| CN112178885A (en) * | 2020-09-08 | 2021-01-05 | Tcl空调器(中山)有限公司 | Shutdown control method of compressor and air conditioning equipment |
| US11088648B2 (en) | 2017-09-11 | 2021-08-10 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Intelligent power module and controller for air conditioner |
| CN113251641A (en) * | 2021-04-30 | 2021-08-13 | 青岛海尔空调器有限总公司 | Compressor control method, compressor control device, compressor control apparatus, storage medium, and program product |
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| CN102110990A (en) * | 2011-02-28 | 2011-06-29 | 中南大学 | Wind power generation system based on reverse loose matrix converter and method thereof |
| CN201937399U (en) * | 2011-02-23 | 2011-08-17 | 北京运通恒昌驱动技术有限公司 | DC brushless motor driving device with function of overhigh counter electromotive force protection |
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| CN1972056A (en) * | 2005-11-23 | 2007-05-30 | 乐金电子(天津)电器有限公司 | Compressor motor drive circuit over-current protection structure |
| CN101325366A (en) * | 2007-06-14 | 2008-12-17 | 海尔集团公司 | Circuit with protective circuit for correcting active power factor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492878A (en) * | 2017-09-11 | 2017-12-19 | 广东美的制冷设备有限公司 | SPM and controller of air conditioner |
| CN107492879A (en) * | 2017-09-11 | 2017-12-19 | 广东美的制冷设备有限公司 | SPM and controller of air conditioner |
| US11088648B2 (en) | 2017-09-11 | 2021-08-10 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Intelligent power module and controller for air conditioner |
| CN108400744A (en) * | 2018-03-28 | 2018-08-14 | 深圳还是威健康科技有限公司 | A kind of motor drive circuit and smart machine |
| CN112178885A (en) * | 2020-09-08 | 2021-01-05 | Tcl空调器(中山)有限公司 | Shutdown control method of compressor and air conditioning equipment |
| CN113251641A (en) * | 2021-04-30 | 2021-08-13 | 青岛海尔空调器有限总公司 | Compressor control method, compressor control device, compressor control apparatus, storage medium, and program product |
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Application publication date: 20150729 |
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| RJ01 | Rejection of invention patent application after publication |