CN204231188U - Power conversion circuit and transducer air conditioning - Google Patents
Power conversion circuit and transducer air conditioning Download PDFInfo
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- CN204231188U CN204231188U CN201420485465.6U CN201420485465U CN204231188U CN 204231188 U CN204231188 U CN 204231188U CN 201420485465 U CN201420485465 U CN 201420485465U CN 204231188 U CN204231188 U CN 204231188U
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 46
- 238000004378 air conditioning Methods 0.000 title claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 description 24
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 12
- 230000001052 transient effect Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
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- 230000008901 benefit Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model proposes a kind of power conversion circuit and a kind of transducer air conditioning, wherein, power conversion circuit comprises: rectification circuit, carries out rectification process, to obtain the first direct current to the first alternating current that AC power exports; DC circuit, converts the first direct current received to second direct current; Inverter circuit, carries out inversion process by the second direct current received, to obtain and to export the second alternating current to load; Relay, is connected between AC power and rectification circuit, to control connection between rectification circuit and AC power or disconnection; Power-on protective circuit, is connected in parallel on the two ends of relay, and at powered on moment, when relay is in off-state, the first alternating current that AC power exports exports rectification circuit to by power-on protective circuit, to limit the electric current of powered on moment, until relay closes.By this technical scheme, the too large problem that there is potential safety hazard of powered on moment impact electric current can be solved, thus improve the fail safe of power conversion circuit.
Description
Technical field
The utility model relates to an electro-technical field, in particular to a kind of power conversion circuit and a kind of transducer air conditioning.
Background technology
At present, the power conversion circuit of transducer air conditioning many employings AC-DC-interchange, air-conditioning producer has developed and has been arranged on AC-DC between AC power and load-alternating electromotive force change-over circuit, power conversion circuit of the prior art, as shown in Figure 1, it comprises relay, rectification circuit, DC circuit and inverter circuit, wherein, between AC power and DC circuit, be connected with wire, but, due to from the direct lead-in conductor of AC power to DC circuit, belong to normal open state, instantaneously can by this wire through impacting the capacitor charging in DC in system electrification, controller may be damaged, there is safety defect.And, when thunderbolt or surge appear in AC power, be applied directly on electric capacity, because the capacitance of electric capacity is less, there will be transient overvoltage, easily damage DC/DC transducer, thus make control circuit inefficacy cause security incident.
Therefore, how to overcome above-mentioned defect, become technical problem urgently to be resolved hurrily at present.
Utility model content
The utility model, just based on the problems referred to above, proposes a kind of new power conversion circuit, can suppress the impact of powered on moment electric current, thus improves the fail safe of power conversion circuit.
For this reason, an object of the present utility model is to propose a kind of power conversion circuit.
Another object of the present utility model is to propose a kind of transducer air conditioning.
For achieving the above object, according to the embodiment of first aspect of the present utility model, propose a kind of power conversion circuit, comprising: rectification circuit, be connected to AC power, rectification process is carried out, to obtain the first direct current to the first alternating current that AC power exports; DC circuit, is connected to described rectification circuit, converts the first direct current received to second direct current; Inverter circuit, is connected to described DC circuit, and described second direct current received is carried out inversion process, to obtain and to export the second alternating current to load; Relay, is connected between described AC power and described rectification circuit, to control connection between described rectification circuit and described AC power or disconnection; Power-on protective circuit; be connected in parallel on the two ends of described relay; at powered on moment; when described relay is in off-state; the first alternating current that described AC power exports exports described rectification circuit to by described power-on protective circuit; to limit the electric current of powered on moment, until described relay closes.
According to the power conversion circuit of embodiment of the present utility model; the power-on protective circuit in parallel at the two ends of relay; at powered on moment; when relay is in off-state; the electric current that AC power exports enters rectification circuit by power-on protective circuit; by the electric current of power-on protective circuit volitional check powered on moment, thus suppress the impact of powered on moment electric current.
In addition, according to the power conversion circuit of the utility model above-described embodiment, following additional technical characteristic can also be had:
According to an embodiment of the present utility model, described power-on protective circuit comprises thermistor.
According to the power conversion circuit of embodiment of the present utility model, preferably, power-on protective circuit adopts a thermistor.
According to an embodiment of the present utility model, described rectification circuit is full-wave rectifying circuit.
According to the circuit conversion circuit of embodiment of the present utility model, rectification circuit is the diode bridge be made up of 4 diodes, and rectification circuit carries out full-wave rectification to the output of AC power, and exports to DC circuit.
According to an embodiment of the present utility model, described DC circuit comprises: reactor, and one end of described reactor is connected to the first output of described rectification circuit; Diode; Resistance, described diode is connected between the other end of described reactor and one end of described resistance, and wherein, the positive pole of described diode is connected to the other end of described reactor, and the negative pole of described diode is connected to described resistance; First electric capacity, is connected to the other end of described resistance and the second output of described rectification circuit; Second electric capacity, is connected in parallel between one end of described reactor and the other end of described first electric capacity.
The second electric capacity due to DC circuit is low capacity, and thus when the energy flowing into DC circuit is less, direct voltage also significantly changes.Further, as the situation that direct voltage easily rises, can enumerate when producing the LC resonance of reactor and the second electric capacity due to the distortion of power supply connection/power supply and the inductance energy backflow of load when inverter circuit stops time.As preventing above-mentioned superpotential countermeasure, propose energy absorption circuit, i.e. the circuit of diode, resistance and the first electric capacity composition.Except the second electric capacity, also the first electric capacity is charged, thus the second electric capacity apparent on capacity increase.Further, resistance suppresses the charging current to the first electric capacity.Therefore, the variation of the potential difference at the two ends of the second electric capacity diminishes, and can prevent overvoltage.The charging voltage of the first electric capacity is smoothly substantially constant, and thus the first electric capacity can be used as the power supply carrying out the circuit driven with fixed voltage.
And when thunderbolt or surge appear in AC power, first by rectification circuit and reactor, thus effectively weaken the impact of thunderbolt or surge, enter into DC circuit afterwards, period to the second electric capacity and the first capacitor charging, have resistance so effectively can suppress transient overvoltage, and the second electric capacity can be connected due to the first capacitances in series with inverter circuit, inverter circuit can absorb thunderbolt and the impact that brings of surge further, thus avoids voltage instantaneous impact too high.
According to an embodiment of the present utility model, described inverter circuit comprises: multiple inversion group be connected in parallel, and wherein, multiple described inversion groups are connected in the two ends of described second electric capacity in parallel, comprise two power components be connected in series in each inversion group.
According to an embodiment of the present utility model, described power component comprises transistor.
According to an embodiment of the present utility model, also comprise: DC converter, be connected in the two ends of described first electric capacity in parallel.
According to an embodiment of the present utility model, also comprise: control circuit, be connected between described DC converter and described relay, control the disconnection of described relay and close and transmit control signal to described inverter circuit.
According to the power conversion circuit of embodiment of the present utility model, the charging voltage of described first electric capacity is carried out the control circuit of the on/off of described relay as power supply.When relay disconnects, first is also charged, and thus electric first electric capacity is all the time as the power supply of control circuit.
Wherein, control circuit sends connection signal to relay, sends the control signal of driving power element to inverter circuit.The charging voltage of the first electric capacity drives as power supply by control circuit.As mentioned above, even if when relay disconnects, also can charge to the first electric capacity, thus can guarantee the power supply of control circuit.Control circuit drives all the time, thus can send connection signal to relay, and relay is connected, thus can drive power conversion circuit.If relay is connected, then by diode, resistance, the first electric capacity is charged.In addition, be converted to by DC/DC converter the voltage that control circuit can drive as required.
Propose a kind of transducer air conditioning according to the embodiment of the utility model second aspect, comprising: the power conversion circuit according to any one of technique scheme.
By the technical solution of the utility model, the too large problem that there is potential safety hazard of power conversion circuit powered on moment impact electric current can be solved, transient high voltage when thunderbolt and surge can be suppressed simultaneously, thus improve the fail safe of power conversion circuit.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of the power conversion circuit in correlation technique;
Fig. 2 shows the block diagram of the power conversion circuit according to embodiment of the present utility model;
Fig. 3 shows the concrete structure figure of the power conversion circuit according to embodiment of the present utility model.
Embodiment
In order to more clearly understand above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the drawings and specific embodiments, the utility model is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the utility model; but; the utility model can also adopt other to be different from other modes described here and implement, and therefore, protection range of the present utility model is not by the restriction of following public specific embodiment.
Fig. 2 shows the block diagram of the power conversion circuit according to embodiment of the present utility model.
As shown in Figure 2, according to the power conversion circuit 10 of embodiment of the present utility model, comprising: rectification circuit 16, be connected to AC power 12, rectification process is carried out, to obtain the first direct current to the first alternating current that AC power exports; DC circuit 18, is connected to described rectification circuit 16, converts the first direct current received to second direct current; Inverter circuit 20, is connected to described DC circuit 18, and described second direct current received is carried out inversion process, to obtain and to export the second alternating current to load; Relay 19, is connected between described AC power 12 and described rectification circuit 16, to control connection between described rectification circuit 16 and described AC power 12 or disconnection; Power-on protective circuit 21; be connected in parallel on the two ends of described relay 19; at powered on moment; when described relay 19 is in off-state; the first alternating current that described AC power 12 exports exports described rectification circuit 16 to by described power-on protective circuit 21; to limit the electric current of powered on moment, until described relay 19 closes.
According to the power conversion circuit of embodiment of the present utility model; the power-on protective circuit in parallel at the two ends of relay; at powered on moment; when relay is in off-state; the electric current that AC power exports enters rectification circuit by power-on protective circuit; by the electric current of power-on protective circuit volitional check powered on moment, thus suppress the impact of powered on moment electric current.
In addition, according to the power conversion circuit of the utility model above-described embodiment, following additional technical characteristic can also be had:
According to an embodiment of the present utility model, described power-on protective circuit 21 comprises thermistor.
According to the power conversion circuit of embodiment of the present utility model, preferably, power-on protective circuit 21 adopts a thermistor.
According to an embodiment of the present utility model, described rectification circuit 16 is full-wave rectifying circuit.
According to the circuit conversion circuit of embodiment of the present utility model, rectification circuit 16 is the diode bridges be made up of 4 diodes, and full-wave rectification is carried out in the output of rectification circuit 16 pairs of AC power, and exports to DC circuit 18.
According to an embodiment of the present utility model, described DC circuit 18 comprises: reactor, and one end of described reactor is connected to the first output of described rectification circuit 16; Diode; Resistance, described diode is connected between the other end of described reactor and one end of described resistance, and wherein, the positive pole of described diode is connected to the other end of described reactor, and the negative pole of described diode is connected to described resistance; First electric capacity, is connected to the other end of described resistance and the second output of described rectification circuit 16; Second electric capacity, is connected in parallel between one end of described reactor and the other end of described first electric capacity.
The second electric capacity due to DC circuit 18 is low capacity, and thus when the energy flowing into DC circuit 18 is less, direct voltage also significantly changes.Further, as the situation that direct voltage easily rises, can enumerate when producing the LC resonance of reactor and the second electric capacity due to the distortion of power supply connection/power supply and the inductance energy backflow of load when inverter circuit stops time.As preventing above-mentioned superpotential countermeasure, propose energy absorption circuit, i.e. the circuit of diode, resistance and the first electric capacity composition.Except the second electric capacity, also the first electric capacity is charged, thus the second electric capacity apparent on capacity increase.Further, resistance suppresses the charging current to the first electric capacity.Therefore, the variation of the potential difference at the two ends of the second electric capacity diminishes, and can prevent overvoltage.The charging voltage of the first electric capacity is smoothly substantially constant, and thus the first electric capacity can be used as the power supply carrying out the circuit driven with fixed voltage.
And when thunderbolt or surge appear in AC power, first by rectification circuit and reactor, thus effectively weaken the impact of thunderbolt or surge, enter into DC circuit 18 afterwards, period to the second electric capacity and the first capacitor charging, have resistance so effectively can suppress transient overvoltage, and the second electric capacity can be connected due to the first capacitances in series with inverter circuit 20, inverter circuit 20 can absorb thunderbolt and the impact that brings of surge further, thus avoids voltage instantaneous impact too high.
According to an embodiment of the present utility model, described inverter circuit 20 comprises: multiple inversion group be connected in parallel, and wherein, multiple described inversion groups are connected in the two ends of described second electric capacity in parallel, comprise two power components be connected in series in each inversion group.
According to an embodiment of the present utility model, described power component comprises transistor.
According to an embodiment of the present utility model, also comprise: DC converter 32, be connected in the two ends of described first electric capacity in parallel.
According to an embodiment of the present utility model, also comprise: control circuit 26, be connected between described DC converter 32 and described relay 19, control the disconnection of described relay 19 and close and transmit control signal to described inverter circuit 20.
According to the power conversion circuit of embodiment of the present utility model, the charging voltage of described first electric capacity is carried out the control circuit 26 of the on/off of described relay 19 as power supply.When relay disconnects, first is also charged, and thus electric first electric capacity is all the time as the power supply of control circuit 26.
Wherein, control circuit 26 sends connection signal to relay 19, sends the control signal of driving power element to inverter circuit 20.The charging voltage of the first electric capacity drives as power supply by control circuit 26.As mentioned above, even if when relay 19 disconnects, also can charge to the first electric capacity, thus can guarantee the power supply of control circuit 26.Control circuit 26 drives all the time, thus can send connection signal to relay 19, relay 19 is connected, thus can drive power conversion circuit 10.If relay 19 is connected, then by diode, resistance, the first electric capacity is charged.In addition, be converted to by DC/DC converter (i.e. DC converter 32) voltage that control circuit 26 can drive as required.
The technical solution of the utility model is described in detail below with a specific embodiment.
Fig. 3 shows the concrete structure figure of the power conversion circuit according to embodiment of the present utility model.
As shown in Figure 3, comprise according to the power conversion circuit of embodiment of the present utility model: rectification circuit 16, DC circuit 18 and inverter circuit 20.DC circuit 18 is flowed in order to prevent the electric energy when inverter circuit 20 quits work.
Rectification circuit 16 is the diode bridges be made up of 4 diodes.Full-wave rectification is carried out in the output of rectification circuit 16 pairs of AC power 12, and exports to the power line 22 of upper arm and the power line 24 of underarm.
DC circuit 18 by the reactor Lin sealed in power line 22, the smoothing capacity Cdc between power line 22 and 24, and Ds diode between power line 22 and 24, Rs resistance, Cs electric capacity are formed.Wherein Ds diode cathode one termination 22 power line, negative pole one termination Rs resistance, R is an other termination Cs electric capacity, the other termination power line 24 of Cs.
Inverter circuit 20 has closedown power component (transistor) and fast recovery diode by 6 tunnels, produces 3 cross streams electricity, drive load 14.
Smmothing capacitor Cdc due to DC circuit 18 is low capacity, and thus when the energy flowing into DC circuit 18 is less, direct voltage also significantly changes.Further, as the situation that direct voltage easily rises, can enumerate when producing the LC resonance of reactor Lin and smmothing capacitor Cdc due to the distortion of power supply connection/power supply and the inductance energy backflow of load 14 when inverter circuit stops time.As preventing above-mentioned superpotential countermeasure, propose as shown in Figure 3, at the energy absorption circuit 28 that DC circuit 18 is arranged.Energy absorption circuit 28 is connected in series with diode Ds, resistance Rs, electrolytic capacitor Cs between power line 22,24.Except smmothing capacitor Cdc, also electrolytic capacitor Cs is charged, thus smmothing capacitor Cdc apparent on capacity increase.Further, resistance Rs suppresses the charging current to electrolytic capacitor Cs.Therefore, the variation of the potential difference Vdc at the two ends of smmothing capacitor Cdc diminishes, and can prevent overvoltage.
The charging voltage of electrolytic capacitor Cs is smoothly substantially constant.Electrolytic capacitor Cs can be used as the power supply carrying out the circuit driven with fixed voltage.Use electrolytic capacitor Cs as the power supply of control circuit 26.Owing to having electrolytic capacitor, thus overvoltage can be prevented.
Special character of the present utility model is, is provided with relay S and the PTC in parallel with relay S (Positive TemperatureCoefficient) thermistor that power supply disconnects between power supply 12 with rectification circuit 16.Off-state is belonged at powered on moment relay; AC power portion 12 electric current enters rectification circuit 16 by PTC thermistor (being namely equivalent to the power-on protective circuit 19 in Fig. 2); PTC thermistor is the semiconductor resistor that a kind of typical case has temperature sensitivity; when exceeding certain temperature (Curie temperature), its resistance value along with the rising of temperature be increasing of step evolution.When powered on moment electric current increases, PTC resistance heating temperature rises, and resistance sharply increases, thus Limited Current, therefore by PTC thermistor volitional check powered on moment electric current, and Cs complete charging system stable after, closing relay S.AC power portion 12 electric current enters rectification circuit 16 by relay S.And, when there is thunderbolt or surge in AC power 12, first by rectification circuit 16 and filter inductance Lin, thus effectively weaken the impact of thunderbolt or surge, enter into DC circuit 18 afterwards, period can to Cdc electric capacity and Cs capacitor charging, resistance Rs is had so effectively transient overvoltage can be suppressed due to Cs capacitances in series, and Cdc is connected with inverter circuit 20, inverter circuit 20 can absorb thunderbolt and the impact that brings of surge further, thus avoids the impact of Vdc voltage instantaneous too high.
Power conversion circuit carries out rectification at diode bridge usually, and charges to capacitor Cdc and Cs being positioned at face thereafter.When being positioned at the relay S before diode bridge and disconnecting, charge to electrolytic capacitor from PTC thermistor via rectification circuit.
Power conversion circuit also has the control circuit 26 charging voltage of described electrolytic capacitor Cs being controlled described inverter circuit 20 as power supply.The charging voltage of electrolytic capacitor is carried out action as power supply by control circuit 26.Control circuit 26 also controls the on/off of relay in addition.When relay disconnects, electrolytic capacitor is also charged, and thus electrolytic capacitor is all the time as the power supply of control circuit.
In the path of output voltage applying AC power via described rectification circuit 16 to described electrolytic capacitor Cs, there is resistance Rs.What utilize resistance Rs to carry out electric current subtracts stream, and regulates the voltage being applied to electrolytic capacitor.
More than be described with reference to the accompanying drawings the technical solution of the utility model, pass through the technical solution of the utility model, the too large problem that there is potential safety hazard of powered on moment impact electric current can be solved, transient high voltage when thunderbolt and surge can be suppressed simultaneously, thus improve the fail safe of power conversion circuit.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (9)
1. a power conversion circuit, is characterized in that, comprising:
Rectification circuit, is connected to AC power, carries out rectification process, to obtain the first direct current to the first alternating current that AC power exports;
DC circuit, is connected to described rectification circuit, converts the first direct current received to second direct current;
Inverter circuit, is connected to described DC circuit, and described second direct current received is carried out inversion process, to obtain and to export the second alternating current to load;
Relay, is connected between described AC power and described rectification circuit, to control connection between described rectification circuit and described AC power or disconnection;
Power-on protective circuit; be connected in parallel on the two ends of described relay; at powered on moment; when described relay is in off-state; the first alternating current that described AC power exports exports described rectification circuit to by described power-on protective circuit; to limit the electric current of powered on moment, until described relay closes.
2. power conversion circuit according to claim 1, is characterized in that, described power-on protective circuit comprises thermistor.
3. power conversion circuit according to claim 1, is characterized in that, described rectification circuit is full-wave rectifying circuit.
4. power conversion circuit according to claim 1, is characterized in that, described DC circuit comprises:
Reactor, one end of described reactor is connected to the first output of described rectification circuit;
Diode;
Resistance, described diode is connected between the other end of described reactor and one end of described resistance, and wherein, the positive pole of described diode is connected to the other end of described reactor, and the negative pole of described diode is connected to described resistance;
First electric capacity, is connected to the other end of described resistance and the second output of described rectification circuit;
Second electric capacity, is connected in parallel between one end of described reactor and the other end of described first electric capacity.
5. power conversion circuit according to claim 4, is characterized in that, described inverter circuit comprises:
Multiple inversion group be connected in parallel, wherein, multiple described inversion groups are connected in the two ends of described second electric capacity in parallel, comprise two power components be connected in series in each inversion group.
6. power conversion circuit according to claim 5, is characterized in that, described power component comprises transistor.
7. power conversion circuit according to claim 4, is characterized in that, also comprises:
DC converter, is connected in the two ends of described first electric capacity in parallel.
8. power conversion circuit according to claim 7, is characterized in that, also comprises:
Control circuit, is connected between described DC converter and described relay, controls the disconnection of described relay and closes and transmit control signal to described inverter circuit.
9. a transducer air conditioning, is characterized in that, comprising: the power conversion circuit according to any one of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420485465.6U CN204231188U (en) | 2014-08-26 | 2014-08-26 | Power conversion circuit and transducer air conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420485465.6U CN204231188U (en) | 2014-08-26 | 2014-08-26 | Power conversion circuit and transducer air conditioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204231188U true CN204231188U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420485465.6U Expired - Lifetime CN204231188U (en) | 2014-08-26 | 2014-08-26 | Power conversion circuit and transducer air conditioning |
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| Country | Link |
|---|---|
| CN (1) | CN204231188U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186841A (en) * | 2015-06-26 | 2015-12-23 | 广东美的制冷设备有限公司 | Power supply circuit for inverter power sources and home appliance with same |
| CN105356460A (en) * | 2015-11-23 | 2016-02-24 | 珠海格力电器股份有限公司 | Multi-split air conditioner and power supply system and method thereof |
| CN106300939A (en) * | 2015-06-03 | 2017-01-04 | 广州汽车集团股份有限公司 | A kind of bus capacitor circuit and vehicle-mounted three phase electric machine inverter |
| CN108471161A (en) * | 2018-05-31 | 2018-08-31 | 奥克斯空调股份有限公司 | Three phase mains charging circuit and air conditioner |
| CN108539992A (en) * | 2017-03-02 | 2018-09-14 | 奥克斯空调股份有限公司 | A kind of power conversion circuit |
| CN108599545A (en) * | 2018-05-31 | 2018-09-28 | 奥克斯空调股份有限公司 | High-voltage large-capacity charging circuit and air conditioner |
| CN110086331A (en) * | 2019-01-16 | 2019-08-02 | 广东美的制冷设备有限公司 | Drive control circuit, air-conditioner controller and air conditioner |
| CN114337326A (en) * | 2020-11-12 | 2022-04-12 | 华为数字能源技术有限公司 | Power converter, protection method and system |
-
2014
- 2014-08-26 CN CN201420485465.6U patent/CN204231188U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300939A (en) * | 2015-06-03 | 2017-01-04 | 广州汽车集团股份有限公司 | A kind of bus capacitor circuit and vehicle-mounted three phase electric machine inverter |
| CN106300939B (en) * | 2015-06-03 | 2019-04-02 | 广州汽车集团股份有限公司 | A kind of bus capacitor circuit and vehicle-mounted three-phase motor inverter |
| CN105186841A (en) * | 2015-06-26 | 2015-12-23 | 广东美的制冷设备有限公司 | Power supply circuit for inverter power sources and home appliance with same |
| CN105186841B (en) * | 2015-06-26 | 2018-06-01 | 广东美的制冷设备有限公司 | The power supply circuit of inverter and with its household electrical appliance |
| CN105356460A (en) * | 2015-11-23 | 2016-02-24 | 珠海格力电器股份有限公司 | Multi-split air conditioner and power supply system and method thereof |
| CN108539992A (en) * | 2017-03-02 | 2018-09-14 | 奥克斯空调股份有限公司 | A kind of power conversion circuit |
| CN108539992B (en) * | 2017-03-02 | 2020-07-07 | 奥克斯空调股份有限公司 | Power conversion circuit |
| CN108471161A (en) * | 2018-05-31 | 2018-08-31 | 奥克斯空调股份有限公司 | Three phase mains charging circuit and air conditioner |
| CN108599545A (en) * | 2018-05-31 | 2018-09-28 | 奥克斯空调股份有限公司 | High-voltage large-capacity charging circuit and air conditioner |
| CN110086331A (en) * | 2019-01-16 | 2019-08-02 | 广东美的制冷设备有限公司 | Drive control circuit, air-conditioner controller and air conditioner |
| CN114337326A (en) * | 2020-11-12 | 2022-04-12 | 华为数字能源技术有限公司 | Power converter, protection method and system |
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