CN109302082A - The frequency-variable controller and air conditioner of three phase mains - Google Patents
The frequency-variable controller and air conditioner of three phase mains Download PDFInfo
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- CN109302082A CN109302082A CN201811146564.0A CN201811146564A CN109302082A CN 109302082 A CN109302082 A CN 109302082A CN 201811146564 A CN201811146564 A CN 201811146564A CN 109302082 A CN109302082 A CN 109302082A
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- 239000003990 capacitor Substances 0.000 claims abstract description 65
- 239000010409 thin film Substances 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000005669 field effect Effects 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
Abstract
The present invention provides a kind of frequency-variable controller of three phase mains and air conditioners, wherein the frequency-variable controller of the three phase mains includes: three-phase rectifier, peak voltage absorbing circuit, capacitor C and three-phase inverting circuit；The peak voltage absorbing circuit includes: diode D1, resistance R1, resistance R2, resistance R3, capacitor C1 and capacitor C2；Wherein, the diode D1 is connect with the resistance R3；The first end of the resistance R1 is connect with the first end of the capacitor C1, and second end is connect with the second end of the capacitor C1；The first end of the resistance R2 is connect with the second end of the resistance R1, and second end is connect with the three-phase rectifier；The first end of the capacitor C2 is connect with the second end of the first end of resistance R2 and the capacitor C1 simultaneously, and second end is connect with the second end of the resistance R2.The frequency-variable controller and air conditioner of three phase mains of the present invention, it is at low cost, small in size, light-weight, it ensure that circuit reliability, it is therefore prevented that excessive pressure damages device.
Description
Technical field
The present invention relates to frequency conversion control technique field, in particular to the frequency-variable controller and air conditioner of a kind of three phase mains.
Background technique
AC and DC hybrid transmission system is current using most effective speed regulation device extensively, with the development of science and technology and market
Demand, three-phase alternating-current supply on household appliances using more and more extensive, particularly with transducer air conditioning, generally use three-phase
AC power source power supply, can satisfy the use needs of big-room and luxury housing project family, certain plant areas or public place.
Existing three phase mains variable frequency drive controller structure is as shown in Figure 1, three-phase alternating-current supply first passes through three-phase rectifier
Become pulsating dc voltage, is filtered using inductance L and electrolytic capacitor C, finally give three-phase inverting circuit driving motor.
However, some electric appliance complete machine power are larger, and voltage is higher, so needing large bulk capacitance or multiple small capacitances simultaneously
It is together in series again after connection, for the filter circuit of such LC composition with regard to bigger, heavy, cost is also relatively high.
Summary of the invention
In view of this, the present invention is directed to propose the frequency-variable controller and air conditioner of a kind of three phase mains are subtracted with reducing cost
Few volume and weight, promotes the rejection ability to peak voltage.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of frequency-variable controller of three phase mains, comprising: three-phase rectifier, peak voltage absorbing circuit, capacitor C and three
Phase inverter circuit；The peak voltage absorbing circuit includes: diode D1, resistance R1, resistance R2, resistance R3, capacitor C1 and electricity
Hold C2；Wherein,
The diode D1 is connect with the resistance R3；
The first end of the resistance R1 is connect with the first end of the capacitor C1, the second end of second end and the capacitor C1
Connection；
The first end of the resistance R2 is connect with the second end of the resistance R1, and second end and the three-phase rectifier connect
It connects；
The first end of the capacitor C2 is connect with the second end of the first end of resistance R2 and the capacitor C1 simultaneously, second end
It is connect with the second end of the resistance R2.
Further, the first end of the resistance R3 is connect with the cathode of the diode D1, second end and the resistance
The first end of R1 connects, and the anode of the diode D1 is connect with the three-phase rectifier；Or
The first end of the resistance R3 is connect with the three-phase rectifier, the anode of the diode D1 and the resistance R3
Second end connection, cathode connect with the first end of the resistance R1.
Further, the capacitor C is thin-film capacitor, is connect with the peak voltage absorbing circuit.
Further, the three-phase rectifier includes:
Diode D2；
Diode D3, cathode are connect with the anode of the diode D2；
Diode D4, cathode are connect with the cathode of the diode D2；
Diode D5, cathode are connect with the anode of the diode D4, and the anode of anode and the diode D3 connect
It connects；
Diode D6, cathode are connect with the cathode of the diode D4；
Diode D7, cathode are connect with the anode of the diode D6, and the anode of anode and the diode D5 connect
It connects.
Further, the first end of the resistance R3 is connect with the cathode of the diode D1, second end and the resistance
The first end of R1 connects；
The anode of the diode D1 is connect with the cathode of the diode D6, the second end of the resistance R2 and described two
The anode of pole pipe D7 connects.
Further, the three-phase inverting circuit is connect with the capacitor C comprising 6 controllable electronic switch T1~T6.
Further, the controllable electronic switch is insulated gate bipolar transistor IGBT or Metal-Oxide Semiconductor
Field effect transistor M OSFET.
Further, each controllable electronic switch diode in parallel.
Further, the frequency-variable controller of the three phase mains further include: control circuit, with the three-phase inverting circuit
Connection, for controlling the on-off for driving the controllable electronic switch T1~T6.
A kind of air conditioner comprising the frequency-variable controller of the three phase mains.
Compared with the existing technology, the frequency-variable controller of three phase mains of the present invention and air conditioner have the advantage that
(1) the peak voltage absorbing circuit in frequency-variable controller of the present invention, structure is simple, response is fast, without additional control
Circuit, high reliablity.
(2) frequency-variable controller of the present invention can inhibit DC voltage mistake using peak voltage absorbing circuit and non-electrolytic capacitor
Height, and when motor abnormality is shut down, peak voltage absorbing circuit can consume energy, assist that voltage is inhibited to increase, and improve frequency conversion control
The safety of device processed.
(3) frequency-variable controller of the invention replaces conventional cumbersome using peak voltage absorbing circuit and with non-electrolytic capacitor
Inductance and electrolytic capacitor have achieved the purpose that reduce cost, volume and weight.
(4) frequency-variable controller of the invention compensates control using control circuit, it is ensured that with three-phase inverting circuit
The motor even running of output end connection.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the frequency-variable controller structural schematic diagram of existing three phase mains.
Fig. 2 is the frequency-variable controller structural schematic diagram of one embodiment of the invention three phase mains.
Fig. 3 is the frequency-variable controller structural schematic diagram of another embodiment of the present invention three phase mains.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In one embodiment, as shown in Fig. 2, the no electrolytic capacitor frequency-variable controller of the three phase mains includes: that three-phase is whole
Flow device, peak voltage absorbing circuit, thin-film capacitor C and three-phase inverting circuit.
The input terminal of the three-phase rectifier is connect with the output end of three-phase alternating-current supply (abbreviation three phase mains), and being used for will
The output of three-phase alternating-current supply becomes pulsating direct current output；The peak voltage absorbing circuit is connect with the three-phase rectifier,
Thin-film capacitor C is connect with the peak voltage absorbing circuit, for inhibiting DC voltage excessively high；The three-phase inverting circuit and institute
Thin-film capacitor C and motor connection are stated, for will be through peak voltage absorbing circuit and thin-film capacitor C treated voltage transmission to electricity
Machine, driving motor operation.
Using the no electrolytic capacitor frequency-variable controller of three phase mains of the present invention, three-phase alternating-current supply first passes through three-phase rectifier
Become pulsating direct current, using peak voltage absorbing circuit and thin-film capacitor C, inhibits DC voltage excessively high, be eventually transferred to three
Phase inverter AC motor.
In contrast, frequency-variable controller of the present invention eliminates the inductance in existing frequency-variable controller, and uses low capacity
Thin-film capacitor C substitution conventional cumbersome electrolytic capacitor, achieved the purpose that reduce system cost, weight, realize small in size
Type；Using peak voltage absorbing circuit, when motor abnormality is shut down, thin-film capacitor can not absorb enough energy, by point
Peak voltage absorpting circuit consumes energy, inhibits voltage to increase, thus can guarantee circuit reliability, prevent excessive pressure damages device.
Further, frequency-variable controller of the present invention may also include that control circuit, connect with the three-phase inverting circuit, lead to
Crossing control circuit compensation can guarantee that the motor driven connecting with three-phase inverting circuit output end is steady, avoid DC bus-bar voltage
It pulses larger.
In another embodiment, as shown in figure 3, the frequency-variable controller of the three phase mains includes: three-phase rectifier, with three
The connection of phase AC power source；Peak voltage absorbing circuit is connect with the three-phase rectifier；Capacitor C is absorbed with the peak voltage
Circuit connection；And three-phase inverting circuit, it is connect with the capacitor C and motor.
Specifically, the peak voltage absorbing circuit includes:
Capacitor C1；
Resistance R1, first end are connect with the first end of the capacitor C1, and the second end of second end and the capacitor C1 connect
It connects；
Capacitor C2, first end are connect with the second end of the capacitor C1, and the one of second end and the three-phase rectifier is defeated
Outlet connection,
Resistance R2, first end are connect with the second end of the first end of the capacitor C2, the resistance R1 simultaneously, second end
It is connect with the second end of the capacitor C2；
Diode D1, anode are connect with another output end of the three-phase rectifier；
Resistance R3, first end are connect with the cathode of the diode D1, and the first end of second end and the capacitor C1 connect
It connects.
The peak voltage absorbing circuit can effectively solve the problems, such as busbar voltage be higher than capacitor pressure resistance, wherein resistance R1 R2
Mainly play pressure, come guarantee capacitor C1 C2 both end voltage it is roughly equal, while also playing discharge process, the electricity of exorbitant expenditure
Pressure.After getting higher DC bus-bar voltage (capacitor C both end voltage) moment, diode D1 can be connected, by resistance R3 to capacitor C1
C2 charging, to inhibit overtension, resistance R3 mainly plays a part of to limit charging current, and usually because diode D1 will not
Reverse-conducting, capacitor C1 work of C2 when cannot participate in normal, so to capacitor C1 C2 ripple current it is of less demanding.
Peak voltage absorbing circuit in the frequency-variable controller of the three phase mains of the present embodiment, structure is simple, response is fast, nothing
Need additional control circuit, high reliablity.
The capacitor C is non-electrolytic capacitor, and first end is connect with the anode of the diode D1, second end and the electricity
The second end connection for holding C2, for filtering and absorbing the peak voltage of moment.Preferably, capacitor C is high-pressure-resistant membrane capacitor,
Thin-film capacitor capacity is smaller, generally several microfarads to tens microfarads, using the thin-film electro of peak voltage absorbing circuit and low capacity
Hold and is greatly reduced simultaneously instead of traditional inductance and electrolytic capacitor so that the volume and weight of frequency-variable controller is obviously reduced
Cost.After cancel closedown, back-emf voltage can charge motor to capacitor C, smaller in the capacity of capacitor, can not absorb enough
When more energy, overtension will result in, peak voltage absorbing circuit will work at this time, consume energy, inhibit voltage liter
It is high.
The three-phase rectifier, connect with three-phase alternating-current supply, for alternating current circuit to be become to the direct current galvanic electricity of pulsation
Source comprising:
Diode D2, anode are connect with the three-phase alternating-current supply；
Diode D3, cathode are connect with the anode of the diode D2；
Diode D4, cathode are connect with the cathode of the diode D2, and anode is connect with the three-phase alternating-current supply；
Diode D5, cathode are connect with the anode of the diode D4, and the anode of anode and the diode D3 connect
It connects；
Diode D6, cathode are connect with the anode of the cathode of the diode D4, the diode D1 simultaneously, anode
It is connect with the three-phase alternating-current supply；
Diode D7, cathode are connect with the anode of the diode D6, anode while the sun with the diode D5
The second end connection of pole, the resistance R2.
Certainly, the three-phase rectifier can use as shown in figure 3, be individually composed of six diodes, can also
Using the rectifier module of over all Integration.
The three-phase inverting circuit includes six controllable electronic switch T1~T6, each controllable electronic switch parallel connection one
Diode, the controllable electronic switch can use insulated gate bipolar transistor IGBT, can also be using metal-oxide half
Conductor field effect transistor M OSFET.Wherein,
The controllable electronic switch T1, collector are connect with the first end of the capacitor C；
The controllable electronic switch T2, collector are connect with the emitter of the controllable electronic switch T1, emitter
It is connect with the second end of the capacitor C；
The controllable electronic switch T3, collector are connect with the collector of the controllable electronic switch T1；
The controllable electronic switch T4, collector are connect with the emitter of the controllable electronic switch T3, emitter
It is connect with the emitter of the controllable electronic switch T2；
The controllable electronic switch T5, collector are connect with the collector of the controllable electronic switch T3；
The controllable electronic switch T6, collector are connect with the emitter of the controllable electronic switch T5, emitter
It is connect with the emitter of the controllable electronic switch T4.
The three-phase inverting circuit can use to be formed as shown in figure 3, being switched by six controllable Three-phase electronics, can also be straight
It connects using integrated inverter module.
The motor emitter, controllable with the emitter of the controllable electronic switch T1, controllable electronic switch T3 respectively
The emitter of electronic switch T5 connects.
In addition, in the present embodiment, the frequency-variable controller of the three phase mains further include: control circuit, with three contrary
Become circuit connection, for controlling the on-off for driving the controllable electronic switch T1~T6.Specifically, control circuit is straight by sampling
The signals such as busbar voltage, current of electric are flowed, corresponding control signal is exported according to rotary speed instruction and drives T1~T6 on-off, to reach
To the purpose for making motor even running.
In another embodiment, compared with previous embodiment, slightly different in structure, the tool of the peak voltage absorbing circuit
Body be peak voltage absorbing circuit in diode D1 and resistance R3 sequence exchange (not shown), i.e., the cathode of diode D1 with
The first end of the capacitor C1 connects, and the first end of resistance R3 is connect with the cathode of the diode D6, second end and described two
The anode of pole pipe D1 connects, remaining is identical as previous embodiment, and details are not described herein again.
In addition, the present invention also provides a kind of air conditioners comprising the frequency-variable controller of aforementioned three phase mains.
So far, attached drawing is had been combined to the present invention have been described in detail.According to above description, those skilled in the art are answered
When to three phase mains of the present invention frequency-variable controller and air conditioner have clear understanding.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of frequency-variable controller of three phase mains characterized by comprising three-phase rectifier, peak voltage absorbing circuit, electricity
Hold C and three-phase inverting circuit；The peak voltage absorbing circuit includes: diode D1, resistance R1, resistance R2, resistance R3, electricity
Hold C1 and capacitor C2；Wherein,
The diode D1 is connect with the resistance R3；
The first end of the resistance R1 is connect with the first end of the capacitor C1, and the second end of second end and the capacitor C1 connect
It connects；
The first end of the resistance R2 is connect with the second end of the resistance R1, and second end is connect with the three-phase rectifier；
The first end of the capacitor C2 is connect with the second end of the first end of resistance R2 and the capacitor C1 simultaneously, second end and institute
State the second end connection of resistance R2.
2. the frequency-variable controller of three phase mains according to claim 1, which is characterized in that
The first end of the resistance R3 is connect with the cathode of the diode D1, and the first end of second end and the resistance R1 connect
It connects, the anode of the diode D1 is connect with the three-phase rectifier；Or
The first end of the resistance R3 is connect with the three-phase rectifier, and the of the anode of the diode D1 and the resistance R3
The connection of two ends, cathode are connect with the first end of the resistance R1.
3. the frequency-variable controller of three phase mains according to claim 1, which is characterized in that the capacitor C is thin-film capacitor,
It is connect with the peak voltage absorbing circuit.
4. the frequency-variable controller of three phase mains according to claim 1, which is characterized in that the three-phase rectifier includes:
Diode D2；
Diode D3, cathode are connect with the anode of the diode D2；
Diode D4, cathode are connect with the cathode of the diode D2；
Diode D5, cathode are connect with the anode of the diode D4, and anode is connect with the anode of the diode D3；
Diode D6, cathode are connect with the cathode of the diode D4；
Diode D7, cathode are connect with the anode of the diode D6, and anode is connect with the anode of the diode D5.
5. the frequency-variable controller of three phase mains according to claim 4, which is characterized in that
The first end of the resistance R3 is connect with the cathode of the diode D1, and the first end of second end and the resistance R1 connect
It connects；
The anode of the diode D1 is connect with the cathode of the diode D6, the second end of the resistance R2 and the diode
The anode of D7 connects.
6. the frequency-variable controller of three phase mains according to claim 1, which is characterized in that the three-phase inverting circuit and institute
State capacitor C connection comprising 6 controllable electronic switch T1~T6.
7. the frequency-variable controller of three phase mains according to claim 6, which is characterized in that the controllable electronic switch is exhausted
Edge grid bipolar transistor IGBT or Metal-Oxide Semiconductor field effect transistor M OSFET.
8. the frequency-variable controller of three phase mains according to claim 6, which is characterized in that each controllable electronic switch
A diode in parallel.
9. the frequency-variable controller of three phase mains according to claim 6, which is characterized in that further include: control circuit, with institute
Three-phase inverting circuit connection is stated, for controlling the on-off for driving the controllable electronic switch T1~T6.
10. a kind of air conditioner, which is characterized in that the frequency conversion control including three phase mains as claimed in any one of claims 1-9 wherein
Device processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146564.0A CN109302082A (en) | 2018-09-28 | 2018-09-28 | The frequency-variable controller and air conditioner of three phase mains |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146564.0A CN109302082A (en) | 2018-09-28 | 2018-09-28 | The frequency-variable controller and air conditioner of three phase mains |
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| Publication Number | Publication Date |
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| CN109302082A true CN109302082A (en) | 2019-02-01 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811146564.0A Pending CN109302082A (en) | 2018-09-28 | 2018-09-28 | The frequency-variable controller and air conditioner of three phase mains |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112072904A (en) * | 2020-08-28 | 2020-12-11 | 珠海格力电器股份有限公司 | Direct-current bus protection device, electrical equipment and direct-current bus protection method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101073197A (en) * | 2004-12-09 | 2007-11-14 | 大金工业株式会社 | Multi-phase current supplying circuit, driving apparatus, compressor, and air conditioner |
| JP2011050137A (en) * | 2009-08-26 | 2011-03-10 | Daikin Industries Ltd | Power conversion circuit |
| CN102761269A (en) * | 2012-06-30 | 2012-10-31 | 华为技术有限公司 | Power unit and frequency converter |
| CN104349521A (en) * | 2014-09-05 | 2015-02-11 | 湘潭市南冶中频高新技术开发有限公司 | IGBT (Insulated Gate Bipolar Translator) half-bridge inverter medium-frequency - ultrasonic-frequency - high-frequency induction heating power supply |
| CN204721244U (en) * | 2015-06-26 | 2015-10-21 | 广东美的制冷设备有限公司 | The power supply circuits of inverter and there are its household electrical appliance |
| CN209233733U (en) * | 2018-09-28 | 2019-08-09 | 奥克斯空调股份有限公司 | The frequency-variable controller and air conditioner of three phase mains |
-
2018
- 2018-09-28 CN CN201811146564.0A patent/CN109302082A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101073197A (en) * | 2004-12-09 | 2007-11-14 | 大金工业株式会社 | Multi-phase current supplying circuit, driving apparatus, compressor, and air conditioner |
| JP2011050137A (en) * | 2009-08-26 | 2011-03-10 | Daikin Industries Ltd | Power conversion circuit |
| CN102761269A (en) * | 2012-06-30 | 2012-10-31 | 华为技术有限公司 | Power unit and frequency converter |
| CN104349521A (en) * | 2014-09-05 | 2015-02-11 | 湘潭市南冶中频高新技术开发有限公司 | IGBT (Insulated Gate Bipolar Translator) half-bridge inverter medium-frequency - ultrasonic-frequency - high-frequency induction heating power supply |
| CN204721244U (en) * | 2015-06-26 | 2015-10-21 | 广东美的制冷设备有限公司 | The power supply circuits of inverter and there are its household electrical appliance |
| CN209233733U (en) * | 2018-09-28 | 2019-08-09 | 奥克斯空调股份有限公司 | The frequency-variable controller and air conditioner of three phase mains |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112072904A (en) * | 2020-08-28 | 2020-12-11 | 珠海格力电器股份有限公司 | Direct-current bus protection device, electrical equipment and direct-current bus protection method thereof |
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