CN107959458A - Dc bus low capacity capacitance frequency conversion control circuit and frequency conversion equipment - Google Patents
Dc bus low capacity capacitance frequency conversion control circuit and frequency conversion equipment Download PDFInfo
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- CN107959458A CN107959458A CN201711275760.3A CN201711275760A CN107959458A CN 107959458 A CN107959458 A CN 107959458A CN 201711275760 A CN201711275760 A CN 201711275760A CN 107959458 A CN107959458 A CN 107959458A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 238000005868 electrolysis reaction Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 abstract description 4
- 238000011105 stabilization Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 10
- 238000004378 air conditioning Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 208000032365 Electromagnetic interference Diseases 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- BNPSSFBOAGDEEL-UHFFFAOYSA-N albuterol sulfate Chemical compound OS(O)(=O)=O.CC(C)(C)NCC(O)C1=CC=C(O)C(CO)=C1.CC(C)(C)NCC(O)C1=CC=C(O)C(CO)=C1 BNPSSFBOAGDEEL-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of dc bus low capacity capacitance frequency conversion control circuit and frequency conversion equipment, including rectifier, dc bus, low capacity capacitance, inverter, Inverter control module, power switch, Inverter control module power supply circuit and power control module；Power switch is connected between rectifier and exchange input；The connection exchange input of Inverter control module power supply circuit, power supply is provided for Inverter control module；Power control module control power switch closure after Inverter control module power supply circuit is stable so that exchange input connection rectifier.Start Inverter control module power supply circuit first after complete machine powering offer exchange input and provide working power for Inverter control module, power control module controls power switch to close so that exchange input connection rectifier again after its stabilization, make inverter control circuit and inverter performance loop time-sharing power in a manner of 2 grades of upper electric control, improve the reliability of frequency control.
Description
Technical field
The invention belongs to motor control technology field, is to be related to a kind of dc bus low capacity capacitance frequency conversion specifically
Control circuit and frequency conversion equipment.
Background technology
There are two class product of constant speed air-conditioning and convertible frequency air-conditioner, constant speed air-conditioning to produce huge impact on startup for air-conditioning market
Electric current influences the operation of other electric appliances in power grid, and a large amount of harmonic waves can be produced in operational process, increases network load and influences power grid
Safety, but since constant speed air-conditioning cost is low, therefore occupy the air conditioner market of large scale.
The DC filtering link of the frequency control of traditional convertible frequency air-conditioner is by thousands of microfarads even electrolysis of thousands of microfarads
Capacitance forms, but the capacity conference of electrolytic capacitor, is distorted in mains input side electric current and causes harmonic components high, and power
Factor the, harmonic wave caused by order to improve filter capacitor discharge and recharge, and need to increase PFC（Power Factor
Correction, power factor correction）Circuit carries out power factor correction and solves harmonic problem；And opening in pfc circuit
Very big power loss and very big EMI can be produced under higher switching frequency by closing device（Electro Magnetic
Interference, electromagnetic interference）Interference, does not solve problem increase EMI filtering cost in need, therefore, traditional frequency conversion
Control circuit high expensive, and the vulnerable device that electrolytic capacitor and the power device in PFC circuits are frequency-variable controller, wherein especially
It is that electrochemical capacitor life is influenced to become apparent from by temperature and voltage.
Itd is proposed in view of the above problems, having in the prior art with the scheme of the thin-film capacitor substitution electrolytic capacitor of low-capacitance, energy
PFC parts and EMI filtering parts are enough saved, realizes miniaturization and the low cost of frequency conversion control circuit, can also eliminate electrolysis electricity
The problem of holding short life, but the capacity of the usually thin-film capacitor of low-capacitance is small, causes DC bus-bar voltage unstable, works as system impedance
When matching improper, system resonance is caused, the over-voltage fault of system occurs, to overcome these problems, existing solution is logical
The detection to parameters such as AC-input voltage, busbar voltages is crossed, is asked with driving algorithm to solve DC bus-bar voltage stability
Topic.
The content of the invention
This application provides a kind of dc bus low capacity capacitance frequency conversion control circuit and frequency conversion equipment, a kind of utilization is built
The frequency conversion control circuit of low-capacitance thin-film capacitor, to realize the stability Design to DC bus-bar voltage, and is capable of providing solution
The parameters of harmonic problem and the driving algorithm of DC bus-bar voltage stability.
To realize above-mentioned technique effect, the application is achieved using following technical scheme：
It is proposed a kind of dc bus low capacity capacitance frequency conversion control circuit, including it is rectifier, dc bus, low capacity capacitance, inverse
Become device and Inverter control module；Two output terminals of the rectifier connect the dc bus, the low capacity capacitance and institute
It is in parallel with the dc bus successively to state inverter；Further include power switch, Inverter control module power supply circuit and for automatically controlled
Molding block；The power switch is connected between the rectifier and exchange input；The Inverter control module power supply circuit
The exchange input is connected, power supply is provided for the Inverter control module；The power control module, in the inversion
After device control module power supply circuit is stable, the power switch is controlled to close, so that described in the exchange input connection
Rectifier.
It is proposed a kind of frequency conversion equipment, including dc bus low capacity capacitance frequency conversion control circuit, the dc bus little Rong
Amount capacitance frequency conversion control circuit includes rectifier, dc bus, low capacity capacitance, inverter and Inverter control module；It is described
Two output terminals of rectifier connect the dc bus, the low capacity capacitance and the inverter successively with the dc bus
It is in parallel；Further include power switch, Inverter control module power supply circuit and power control module；The power switch is connected to institute
State between rectifier and exchange input；The Inverter control module power supply circuit connection exchange input, is the inversion
Device control module provides power supply；The power control module, for stable in the Inverter control module power supply circuit
Afterwards, the power switch is controlled to close, so that the exchange input connects the rectifier.
Compared with prior art, the advantages of the application and good effect is：The dc bus low capacity electricity that the application proposes
Hold frequency conversion control circuit include rectifier, dc bus, low capacity capacitance, inverter, Inverter control module, power switch,
Inverter control module power supply circuit and power control module；Inverter control module power supply circuit is directly connected to exchange input,
Power switch is connected between exchange input and rectifier, power switch disconnects so that exchange input is separated with rectifier, whole
Machine powers on to be started Inverter control module power supply circuit after offer exchange input for Inverter control module to provide work electric first
Source, after its stabilization, power control module controls power switch to close so that exchanging input connection rectifier again, then rectifier
DC power supply is exported again to inverter, is realized inverter busbar power supply electrifying, is made inversion by way of this 2 grades upper electric control
Device control loop and inverter performance loop time-sharing power, improve the reliability of frequency control.Increase surge voltage absorbs back
Road, can be by the surge voltage absorption circuit by surge energy when in second level circuit, moment surge over voltage occurs in busbar voltage
Bleed off avoids the excessive pressure damages of second level power device into the bus capacitor in first order circuit, improves reliability, realizes to straight
Flow the stability Design of busbar voltage.
After the detailed description of the application embodiment is read in conjunction with the figure, other features and advantage of the application will become more
Add clear.
Brief description of the drawings
Fig. 1 is the circuit embodiments figure for the dc bus low capacity capacitance frequency conversion control circuit that the application proposes；
Fig. 2 is the implementation illustration for the dc bus overvoltage crowbar that the application proposes；
Fig. 3 is the implementation illustration for the AC-input voltage detection circuit that the application proposes.
Embodiment
The embodiment of the application is described in more detail below in conjunction with the accompanying drawings.
As shown in Figure 1, the dc bus low capacity capacitance frequency conversion control circuit that the application proposes, including it is rectifier U1, straight
Flow busbar, low capacity capacitance C1, inverter U, Inverter control module U2, power switch K1, Inverter control module power supply electricity
Road U3 and power control module U4；The two output terminal b1 of rectifier U1 connect dc bus, low capacity capacitance C1 and inversion with b2
Device U is in parallel with dc bus successively；Power switch K1 is connected between rectifier U1 and exchange input AC；Inverter control module
Power supply circuit U3 connections exchange input AC, working power is provided for Inverter control module U2；Power control module U4 is used for
After Inverter control module power supply circuit U3 is stable, control power switch K1 closures, so that exchange input AC connections are whole
Flow device U1；Inverter U connection motors COMP.
Inverter control module power supply circuit U3 is directly connected to exchange input AC, connects between exchange input AC and rectifier U1
Power switch K1 is connected to, power switch K1 is disconnected so that exchange input AC and rectifier U1 is separated, in complete machine powering offer exchange
It can start Inverter control module power supply circuit U3 first after input AC and provide working power for Inverter control module U2, at it
After stabilization, power control module U4 controls power switch K1 to close again so that exchange input AC connection rectifier U1, then rectification
Device U1 exports DC power supply to inverter U again, inverter busbar power supply electrifying is realized, by way of this 2 grades upper electric control
Make inverter control circuit and inverter performance loop time-sharing power, improve the reliability of frequency control, realize female to direct current
The stability Design of line voltage.
Specifically, as shown in Figure 1, the application propose Inverter control module power supply circuit U3 include first resistor R1,
First diode D1, electrolytic capacitor E1, switching tube IC1 and transformer T；The connection of first resistor R1 one end, which exchanges, inputs AC, and first
The other end of resistance R1 connects the cathode of the first diode D1, the primary coil of the anode connection transformer T of the first diode D1
One end, the second input terminal b of the primary coil other end connecting valve pipe IC1 of transformer T, the output terminal c of switching tube IC1 connect
Ground；The first input end a of switching tube IC1 is connected to the positive terminal of electrolytic capacitor E1 through resistance；Electrolytic capacitor E1 positive terminals connect
The anode of first diode D1, the negative pole end ground connection of electrolytic capacitor E1.
After complete machine powering, exchange input AC is straight by the first diode D1 halfwave rectifier output ripples after first resistor R1
Stream, pulsating direct current output makes electrolytic capacitor E1 charge, and when electrolytic capacitor E1 voltages reach setting value, switching tube IC1 is carried out
Switch control, is that Inverter control module U2 and/or power control module U4 powers.
After Inverter control module power supply circuit U3 working stabilities, namely after output steady operation power supply, confession is automatically controlled
Molding block U4 controls power switch K1 to close again, and among these, the output stability of Inverter control module power supply circuit U3 can be with
Measured by time setting or sampled data, for example, power control module U4 can meet Inverter control module power supply electricity
Control closure power switch K1 after the period of road U3 steady operations, alternatively, passing through the defeated of Inverter control module power supply circuit
Go out voltage signal to be sampled to determine whether meet predeterminated voltage, power switch K1 etc. is closed after predeterminated voltage is met.
The dc bus low capacity capacitance frequency conversion control circuit that the application proposes further includes the absorption of dc bus surge voltage
Circuit U5；As shown in Figure 1, the dc bus surge voltage absorption circuit U5 include the second diode D2, second resistance R2 and
Electrolytic capacitor E1；The first DC output end b1's, the second diode D21 of the cathode connection rectifier U1 of second diode D2 is negative
Pole connects second resistance R2, and the other end of second resistance R2 connects the first diode D1 anode and the cathode of electrolytic capacitor E1.By
In the low-capacitance capacitance on dc bus be only the thin-film capacitor of tens microfarads, inverter side feed back moment surge voltage when,
Busbar voltage Vdc1 moments can be caused to raise, inverter end may be caused to damage, therefore, the dc bus surge electricity in the application
Absorption circuit U5 is pressed, in Vdc1>During Vdc2, DC bus-bar voltage is by the second diode D2 and second resistance R2 to electrolytic capacitor
E1 charges, and reduces the magnitude of voltage of Vdc1, safeguards that DC bus-bar voltage is stablized.
Dc bus low capacity capacitance frequency conversion control circuit in the application further includes dc bus overvoltage crowbar；Such as
Shown in Fig. 2, including reference voltage circuit and first comparator U7；Resistor voltage divider circuit in reference voltage circuit such as figure, ginseng
Examine the first input end of the output connection first comparator U7 of potential circuit（Positive terminal in diagram）, the of first comparator U7
Two input terminals（End of oppisite phase in diagram）Be connected on dc bus or the positive terminal of electrolytic capacitor or as depicted with electricity
The output terminal of resistor voltage divider circuit of solution capacitance E1 parallel connections etc. is any to be reflected in the test point of DC bus-bar voltage；First ratio
Output terminal connection Inverter control module U2 compared with device U7；It is higher than the output voltage of reference voltage circuit in DC bus-bar voltage
When, Inverter control module U2 stops inverter according to the output control of first comparator and exports, and realizes to the quick of inverter
Protection.
The dc bus low capacity capacitance frequency conversion control circuit that the application proposes, also solves harmonic problem and direct current to provide
The driving algorithm of busbar voltage stability provides parameters, specifically, the busbar voltage detection circuit U 8 for example shown in Fig. 2；
The busbar voltage detection circuit connects dc bus, for obtaining and exporting the voltage on dc bus；Specific busbar electricity
Press detection circuit resistor voltage divider circuit for example as depicted output or other can realize sampling busbar voltage circuit, this
Application not limits, and the output Vdc1-AD/Vdc2-AD of busbar voltage detection circuit is exported is used for software to MCU or drive module
Protection control.
As shown in figure 3, the dc bus low capacity capacitance frequency conversion control circuit that the application proposes further includes exchange input electricity
Press detection circuit；Including resistance network circuit U10, Bias voltage-setting circuit U11 and the second comparator U12；Resistor network electricity
The input terminal connection exchange input AC of road U10, the first of the second comparator of the first output terminal connection of resistance network circuit are defeated
Enter end（The positive terminal of diagram）；Second output terminal of resistor network connects the second input terminal of the second comparator（What is illustrated is anti-phase
End）；The first input end of output the second comparator of connection of Bias voltage-setting circuit U11, using alternating-current bidirectional detection mode,
Detection signal is applied into a bias voltage, the voltage signal for making output signal be 0-5V, passes through the circuit, MCU, drive module
Control is driven etc. the change that control module can detect input voltage in real time, among these, Vac-AD is exchange input electricity
The analog quantity detection output signal of pressure.
Based on above-mentioned dc bus low capacity capacitance frequency conversion control circuit, the application also protects a kind of such as convertible frequency air-conditioner
Deng frequency conversion equipment, using there is a dc bus low capacity capacitance frequency conversion control circuit as described above, Inverter control module supplies
Circuit is directly connected to exchange input, and power switch is connected between exchange input and rectifier, and power switch is disconnected so that handing over
Flow input to separate with rectifier, it is inverse to start Inverter control module power supply circuit first after complete machine powering provides exchange input
Become device control module and working power is provided, after its stabilization, power control module controls power switch to close again so that exchange is defeated
Enter and connect rectifier, then rectifier exports DC power supply to inverter again, inverter busbar power supply electrifying is realized, by this
The modes of 2 grades of upper electric control make inverter control circuit and inverter performance loop time-sharing power, and improve frequency control can
By property.Increase surge voltage absorption circuit, when moment surge over voltage occurs in busbar voltage in second level circuit, the surge can be passed through
Voltage absorption circuit in the bus capacitor of surge energy bleed off to first order circuit, will avoid the crushing excessively of second level power device
It is bad, reliability is improved, realizes the stability Design to DC bus-bar voltage.It is also, also female to solve harmonic problem and direct current
The driving algorithm of line voltage stability problem provides the parameters such as input voltage, DC bus-bar voltage.
It should be noted that it is limitation of the present invention that described above, which is not, the present invention is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the present invention, also should
Belong to protection scope of the present invention.
Claims (7)
1. dc bus low capacity capacitance frequency conversion control circuit, including rectifier, dc bus, low capacity capacitance, inverter and
Inverter control module；Two output terminals of the rectifier connect the dc bus, the low capacity capacitance and the inversion
Device is in parallel with the dc bus successively；It is characterized in that, further include power switch, Inverter control module power supply circuit and confession
Electric control module；
The power switch is connected between the rectifier and exchange input；
The Inverter control module power supply circuit connection exchange input, power supply is provided for the Inverter control module；
The power control module, for after the Inverter control module power supply circuit is stable, controlling the power supply
Switch closure, so that the exchange input connects the rectifier.
2. dc bus low capacity capacitance frequency conversion control circuit according to claim 1, it is characterised in that the inverter
Control module power supply circuit includes first resistor, the first diode, electrolytic capacitor, switching tube and transformer；
First resistor one end connection exchange input, the other end of the first resistor connect first diode
Cathode, the anode of first diode connect primary coil one end of the transformer, and the primary coil of the transformer is another
One end connects the second input terminal of the switching tube, the output head grounding of the switching tube, the first input end of the switching tube
Connect the positive terminal of the electrolytic capacitor；The electrolytic capacitor positive terminal connects the anode of first diode, the electrolysis
The negative pole end ground connection of capacitance.
3. dc bus low capacity capacitance frequency conversion control circuit according to claim 2, it is characterised in that the direct current is female
Line low capacity capacitance frequency conversion control circuit further includes dc bus surge voltage absorption circuit；
The dc bus surge voltage absorption circuit includes the second diode, second resistance and the electrolytic capacitor；
The cathode of second diode connects the first DC output end of the rectifier, and the anode of second diode connects
The second resistance is connect, the other end of the second resistance connects the anode of first diode.
4. dc bus low capacity capacitance frequency conversion control circuit according to claim 3, it is characterised in that the direct current is female
Line low capacity capacitance frequency conversion control circuit further includes dc bus overvoltage crowbar；
The dc bus overvoltage crowbar includes reference voltage circuit and first comparator；
The first input end of the output connection first comparator of the reference voltage circuit, the second of the first comparator
Input terminal is connected on the dc bus or the positive terminal of the electrolytic capacitor；The output terminal connection institute of the first comparator
State Inverter control module；When the DC bus-bar voltage is higher than the output voltage of the reference voltage circuit, the inversion
Device control module stops the inverter according to the output control of the first comparator and exports.
5. dc bus low capacity capacitance frequency conversion control circuit according to claim 1, it is characterised in that the direct current is female
Line low capacity capacitance frequency conversion control circuit further includes busbar voltage detection circuit；
The busbar voltage detection circuit connects the dc bus, for obtaining and exporting the voltage on the dc bus.
6. dc bus low capacity capacitance frequency conversion control circuit according to claim 1, it is characterised in that the direct current is female
Line low capacity capacitance frequency conversion control circuit further includes AC-input voltage detection circuit；
The AC-input voltage detection circuit includes resistance network circuit, Bias voltage-setting circuit and the second comparator；
The input terminal connection exchange input of the resistance network circuit, the first output terminal connection of the resistance network circuit
The first input end of second comparator；Second output terminal of the resistor network connects the second of second comparator
Input terminal；
The output of the Bias voltage-setting circuit connects the first input end of second comparator.
7. frequency conversion equipment, it is characterised in that including such as claim 1-6 any one of them dc bus low capacity capacitance frequency conversion
Control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711275760.3A CN107959458A (en) | 2017-12-06 | 2017-12-06 | Dc bus low capacity capacitance frequency conversion control circuit and frequency conversion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711275760.3A CN107959458A (en) | 2017-12-06 | 2017-12-06 | Dc bus low capacity capacitance frequency conversion control circuit and frequency conversion equipment |
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| CN107959458A true CN107959458A (en) | 2018-04-24 |
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| CN201711275760.3A Pending CN107959458A (en) | 2017-12-06 | 2017-12-06 | Dc bus low capacity capacitance frequency conversion control circuit and frequency conversion equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768179A (en) * | 2018-07-20 | 2018-11-06 | 珠海格力电器股份有限公司 | Switching power supply circuit, drive plate and variable frequency air conditioner |
| CN109347320A (en) * | 2018-11-26 | 2019-02-15 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of circuit and motor inhibiting discrete device interference |
| CN110474527A (en) * | 2019-08-15 | 2019-11-19 | 海信（山东）空调有限公司 | Converter plant and its control method, the air conditioner of three phase electric power factor correction |
| CN112953349A (en) * | 2020-08-31 | 2021-06-11 | 合肥海尔智能电子有限公司 | Alternating current motor control circuit and lampblack absorber |
| CN113471942A (en) * | 2020-03-30 | 2021-10-01 | 台达电子企业管理（上海）有限公司 | Power supply device with protection circuit |
| CN114301370A (en) * | 2021-12-31 | 2022-04-08 | 日立电梯（中国）有限公司 | Frequency converter |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794553A (en) * | 2005-11-28 | 2006-06-28 | 广州电器科学研究院 | Digitalization high frequency soft switch electroplating power supply |
| CN200983573Y (en) * | 2006-12-12 | 2007-11-28 | 河南中油建设工程有限公司 | Efficient DC share energy-saving and theft-prevention control system of oil extraction well station |
| CN202019304U (en) * | 2011-03-01 | 2011-10-26 | 山东沃森电源设备有限公司 | Three-phase large power frequency conversion power supply |
| CN103187899A (en) * | 2013-04-01 | 2013-07-03 | 北京工业大学 | Surge test system based on sphere gap discharge |
| CN103312139A (en) * | 2012-03-09 | 2013-09-18 | 台达电子工业股份有限公司 | Starting device of grid-connected inverter and control method thereof |
| CN103701309A (en) * | 2013-12-03 | 2014-04-02 | 广东科龙空调器有限公司 | Alternating-direct current power supply system for variable frequency equipment and variable frequency air conditioner |
| CN204408202U (en) * | 2015-03-02 | 2015-06-17 | 湖南中科电气股份有限公司 | The power source special of composite electromagnetic constraint vibration device |
| CN204721211U (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 |
| CN105406569A (en) * | 2015-12-25 | 2016-03-16 | 谢镕安 | Intelligent charging system of super-capacitor blade electric vehicle |
| CN207518501U (en) * | 2017-12-06 | 2018-06-19 | 海信（山东）空调有限公司 | Dc bus low capacity capacitance frequency conversion control circuit and frequency conversion equipment |
-
2017
- 2017-12-06 CN CN201711275760.3A patent/CN107959458A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794553A (en) * | 2005-11-28 | 2006-06-28 | 广州电器科学研究院 | Digitalization high frequency soft switch electroplating power supply |
| CN200983573Y (en) * | 2006-12-12 | 2007-11-28 | 河南中油建设工程有限公司 | Efficient DC share energy-saving and theft-prevention control system of oil extraction well station |
| CN202019304U (en) * | 2011-03-01 | 2011-10-26 | 山东沃森电源设备有限公司 | Three-phase large power frequency conversion power supply |
| CN103312139A (en) * | 2012-03-09 | 2013-09-18 | 台达电子工业股份有限公司 | Starting device of grid-connected inverter and control method thereof |
| CN103187899A (en) * | 2013-04-01 | 2013-07-03 | 北京工业大学 | Surge test system based on sphere gap discharge |
| CN103701309A (en) * | 2013-12-03 | 2014-04-02 | 广东科龙空调器有限公司 | Alternating-direct current power supply system for variable frequency equipment and variable frequency air conditioner |
| CN204408202U (en) * | 2015-03-02 | 2015-06-17 | 湖南中科电气股份有限公司 | The power source special of composite electromagnetic constraint vibration device |
| CN204721211U (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 |
| CN105406569A (en) * | 2015-12-25 | 2016-03-16 | 谢镕安 | Intelligent charging system of super-capacitor blade electric vehicle |
| CN207518501U (en) * | 2017-12-06 | 2018-06-19 | 海信（山东）空调有限公司 | Dc bus low capacity capacitance frequency conversion control circuit and frequency conversion equipment |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768179A (en) * | 2018-07-20 | 2018-11-06 | 珠海格力电器股份有限公司 | Switching power supply circuit, drive plate and variable frequency air conditioner |
| CN109347320A (en) * | 2018-11-26 | 2019-02-15 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of circuit and motor inhibiting discrete device interference |
| CN110474527A (en) * | 2019-08-15 | 2019-11-19 | 海信（山东）空调有限公司 | Converter plant and its control method, the air conditioner of three phase electric power factor correction |
| CN113471942A (en) * | 2020-03-30 | 2021-10-01 | 台达电子企业管理（上海）有限公司 | Power supply device with protection circuit |
| CN112953349A (en) * | 2020-08-31 | 2021-06-11 | 合肥海尔智能电子有限公司 | Alternating current motor control circuit and lampblack absorber |
| CN112953349B (en) * | 2020-08-31 | 2023-02-17 | 合肥海尔智能电子有限公司 | Alternating current motor control circuit and lampblack absorber |
| CN114301370A (en) * | 2021-12-31 | 2022-04-08 | 日立电梯（中国）有限公司 | Frequency converter |
| CN114301370B (en) * | 2021-12-31 | 2024-05-24 | 日立电梯（中国）有限公司 | Frequency converter |
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Address after: 266100 Zhuzhou Road, Laoshan District, Qingdao, Shandong Province, No. 151 Applicant after: Hisense (Shandong) Air-conditioning Co., Ltd. Address before: 266100 Haixin Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant before: Hisense (Shandong) Air-conditioning Co., Ltd. |
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Address after: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Applicant after: Hisense Air Conditioning Co.,Ltd. Address before: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Applicant before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. |
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