CN201682429U - Bridgeless PFC boost rectifier - Google Patents
Bridgeless PFC boost rectifier Download PDFInfo
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- CN201682429U CN201682429U CN2009202620198U CN200920262019U CN201682429U CN 201682429 U CN201682429 U CN 201682429U CN 2009202620198 U CN2009202620198 U CN 2009202620198U CN 200920262019 U CN200920262019 U CN 200920262019U CN 201682429 U CN201682429 U CN 201682429U
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- 238000010168 coupling process Methods 0.000 claims description 4
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
A bridgeless PFC boost rectifier comprises a rectification bridge, an energy storage inductor and a filtering capacitor. The rectification bridge has a MOSFET bidirectional switch on the upper left bridge arm, a MOSFET tube on the lower right bridge arm, a MOSFET bidirectional switch or a MOSFET tube and a MOSFET tube or a MOSFET bidirectional switch on the lower left bridge arm and upper right bridge arm respectively, wherein the lower MOSFET tube drain electrode of the MOSFET bidirectional switch on upper left bridge arm is connected to the drain electrode of the MOSFET tube or of the upper MOSFET tube of the MOSFET bidirectional switch on lower left bridge arm, the source electrode of the MOSFET tube or of the lower MOSFET tube of the MOSFET bidirectional switch on upper right bridge arm is coupled to the drain electrode of the MOSFET tube on the lower right bridge arm. The bridgeless PFC boost rectifier can reduce conduction loss, improve rectifier efficiency, and solve reverse recovery problem, and can be operated under the circumstance of discontinuous and continuous current.
Description
Technical field
The utility model relates to rectifier, particularly relates to a kind of non-bridge PFC boost rectifier.
Background technology
A large amount of frequent use of power electronic equipment caused very serious harmonic pollution to electrical network, therefore must introduce power factor correction (Power Factor Correction, be called for short PFC) circuit, make the power electronic equipment Harmonics of Input satisfy existing harmonic requirement.
As shown in Figure 1, be existing common non-bridge PFC boost rectifier circuit, compare, saved the rectifier bridge of PFC front end, can obtain higher efficient in theory with common BOOST PFC boost rectifier.But this circuit shown in Figure 1 needs two inductance, is respectively applied for the positive-negative half-cycle energy storage in the power supply input, has increased the volume of circuit so virtually.
As shown in Figure 2, be improved non-bridge PFC boost rectifier circuit on circuit base shown in Figure 1.Circuit shown in being somebody's turn to do is because upper left brachium pontis changes the MOSFET pipe into, and the bottom right brachium pontis changes diode into, has saved an inductance simultaneously.But the shortcoming of this circuit is oppositely restorative relatively poor, can only be operated in the discontinuous state of electric current, also just makes the non-bridge PFC boost rectifier only be suitable for being applied in the small-power converter.
Above-mentioned two circuit also exist the circuit turn-on loss big simultaneously, the problem that whole efficiency is not high.
Summary of the invention
Technical problem to be solved in the utility model is: remedy above-mentioned the deficiencies in the prior art, a kind of non-bridge PFC boost rectifier is proposed, can reduce the circuit turn-on loss, raise the efficiency, solved reverse-recovery problems simultaneously, make circuit can not only be operated in the electric current discrete state, also can be operated in the electric current continuous state.
Technical problem of the present utility model is solved by following technical scheme:
A kind of non-bridge PFC boost rectifier, comprise by upper left, upper right, the rectifier bridge that four brachium pontis in lower-left and bottom right are formed, be connected in series in first energy storage inductor between the upper left brachium pontis input of AC power forward output and rectifier bridge, be connected in series in second energy storage inductor between AC power inverse output terminal and the rectifier bridge bottom right brachium pontis input, and be connected filter capacitor between rectifier bridge two outputs, described lower-left brachium pontis comprises N-channel MOS FET pipe, described bottom right brachium pontis comprises N-channel MOS FET pipe, described upper left brachium pontis is composed in parallel with first fast recovery diode by MOSFET pipe and the series connection of the 2nd MOSFET pipe again, described MOSFET pipe and the 2nd MOSFET pipe are N-channel MOS FET pipe, two MOSFET pipes are by source series, the drain coupled of the MOSFET pipe of the drain electrode of described the 2nd MOSFET pipe and described lower-left brachium pontis; Described upper right brachium pontis is composed in parallel with second fast recovery diode by the 4th MOSFET pipe and the series connection of the 5th MOSFET pipe again, described the 4th MOSFET pipe and the 5th MOSFET pipe are N-channel MOS FET pipe, two MOSFET pipes are by source series, the drain coupled of the MOSFET pipe of the drain electrode of described the 5th MOSFET pipe and described bottom right brachium pontis.
Technical problem of the present utility model is solved by following further technical scheme:
A kind of non-bridge PFC boost rectifier, comprise by upper left, upper right, the rectifier bridge that four brachium pontis in lower-left and bottom right are formed, be connected in series in first energy storage inductor between the upper left brachium pontis input of AC power forward output and rectifier bridge, and be connected filter capacitor between rectifier bridge two outputs, described upper right brachium pontis, the bottom right brachium pontis respectively comprises N-channel MOS FET pipe, the drain coupled of the MOSFET pipe of the source electrode of the MOSFET pipe of described upper right brachium pontis and described bottom right brachium pontis, or described upper right brachium pontis, the bottom right brachium pontis respectively comprises a diode, the negative electrode coupling of the diode of the anode of the diode of described upper right brachium pontis and described bottom right brachium pontis, described upper left brachium pontis is composed in parallel with first fast recovery diode by MOSFET pipe and the series connection of the 2nd MOSFET pipe again, described MOSFET pipe and the 2nd MOSFET pipe are N-channel MOS FET pipe, and two MOSFET pipes pass through source series; Described lower-left brachium pontis is composed in parallel with second fast recovery diode by the 3rd MOSFET pipe and the series connection of the 4th MOSFET pipe again, and described the 3rd MOSFET pipe and the 4th MOSFET pipe are N-channel MOS FET pipe, and two MOSFET pipes pass through source series; The drain coupled of the drain electrode of described the 2nd MOSFET pipe and described the 3rd MOSFET pipe
The beneficial effect that the utility model is compared with the prior art is:
Non-bridge PFC boost rectifier of the present utility model, the fly-wheel diode of pfc circuit has changed into by the series connection of two MOSFET pipes and has composed in parallel the MOSFET bidirectional switch with a diode again, utilize MOSFET conduction loss features of smaller, reduced the conduction loss of circuit, the body diode of two MOSFET shields mutually simultaneously, by fast recovery diode afterflow in parallel with it, solved reverse-recovery problems, make circuit can not only be operated in the discontinuous state of electric current, also can be operated in the electric current continuum of states, just make the non-bridge PFC boost rectifier can be suitable for simultaneously being applied in small-power converter and the high-power converter.
Description of drawings
Fig. 1 is a kind of non-bridge PFC boost rectifier circuit structure chart in the background technology;
Fig. 2 is an another kind of non-bridge PFC boost rectifier circuit structure chart in the background technology;
Fig. 3 is the non-bridge PFC boost rectifier circuit structure chart of the utility model embodiment one;
Fig. 4 is Fig. 3 circuit work wave schematic diagram under the electric current continuous state when the positive half cycle of input voltage;
Fig. 5 is the non-bridge PFC boost rectifier circuit structure chart of the utility model embodiment two;
Fig. 6 is Fig. 5 circuit work wave schematic diagram under the electric current continuous state when the positive half cycle of input voltage.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further details.
Embodiment one
As shown in Figure 3, be the non-bridge PFC boost rectifier circuit structure chart of present embodiment.The non-bridge PFC boost rectifier comprises the first energy storage inductor L1, the second energy storage inductor L2, filter capacitor C1, and by rectifier bridge upper left, upper right, that four brachium pontis in lower-left and bottom right are formed.Alternating current input power supplying is AC, the first energy storage inductor L1 is connected in series between AC power AC forward output and the upper left brachium pontis input of rectifier bridge, the second energy storage inductor L2 is connected in series between AC power AC inverse output terminal and the rectifier bridge bottom right brachium pontis input, filter capacitor C1 is connected in parallel between upper left brachium pontis output and the lower-left brachium pontis input, and alternating voltage is exported the work for load resistance Load behind the non-bridge PFC boost rectifier.
Wherein, the lower-left brachium pontis is made up of N-channel MOS FET pipe S3.The bottom right brachium pontis is made up of N-channel MOS FET pipe S6.Upper left brachium pontis composes in parallel with a fast recovery diode D1 after being connected by first N-channel MOS FET pipe S1 and second N-channel MOS FET pipe S2 again, two MOSFET pipe S1 and S2 are by source series, and the drain electrode of MOSFET pipe S2 is connected with the drain electrode that the MOSFET of lower-left brachium pontis manages S3.Upper right brachium pontis composes in parallel with a fast recovery diode D2 after being connected by the 4th N-channel MOS FET pipe S4 and the 5th N-channel MOS FET pipe S5 again, two MOSFET pipe S4 and S5 are by source series, and the drain electrode of MOSFET pipe S5 is connected with the drain electrode that the MOSFET of bottom right brachium pontis manages S6.
As shown in Figure 4, be the non-bridge PFC boost rectifier of the present embodiment work wave schematic diagram under the electric current continuous state when the positive half cycle of input voltage, VGS1, VGS2, VGS3, VGS6 are respectively the control signal driving voltages of MOSFET pipe S1, S2, S3 and S6 among the figure, VL1, IL1 are respectively voltage, the electric currents of the first energy storage inductor L1, VDS3 is the voltage between S3 drain electrode of MOSFET pipe and the source electrode, ID1 is the electric current among the diode D1, and IDS3 is the electric current among the MOSFET pipe S3.
Its course of work is as follows: with the positive half cycle of input voltage is example, MOSFET pipe S6 conducting always, and MOSFET pipe S4, S5 turn-off always.The MOSFET pipe S3 of lower-left brachium pontis is a main switch, and MOSFET pipe S1, the S2 of upper left brachium pontis become the continued flow switch pipe.
At t0-t1 constantly, S3 is open-minded for the MOSFET pipe, and MOSFET pipe S1, S2 turn-off, the first energy storage inductor L1 energy storage, and current direction is: L1, S3, S6, L2, AC power supplies.
At t1-t2 constantly, MOSFET pipe S3 turn-offs, and MOSFET pipe S1, S2 turn-off, and inductance L 1 energy stored discharges through diode D1.Current direction is L1, D1, Load, S6, L2, AC power supplies.
At t2-t3 constantly, S1, S2 are open-minded for the MOSFET pipe, and the current transfer among the diode D1 is in S1, S2.Current direction is L1, S2, S1, Load S6, L2, AC power supplies.
At t3-t4 constantly, MOSFET pipe S1, S2 turn-off, and electric current is transferred to the D1 from S1, S2, and current direction is L1, D1, Load, S6, L2, AC power supplies.
In the t4 moment, S3 is open-minded, first energy storage inductor L1 charging, and following one-period will begin.
When the input voltage negative half period, MOSFET pipe S3 conducting always, MOSFET pipe S1, S2 turn-off always.MOSFET pipe S6 becomes main switch, and MOSFET pipe S4, S5 become the continued flow switch pipe, and its course of work is similar with positive half cycle.
The non-bridge PFC boost rectifier of present embodiment, the fly-wheel diode of pfc circuit changed into by the series connection of two MOSFET pipes composed in parallel the MOSFET bidirectional switch with a fast recovery diode again, utilize MOSFET conduction loss features of smaller, reduced the conduction loss of circuit, the body diode of two MOSFET shields mutually simultaneously, fast recovery diode afterflow by in parallel has with it solved reverse-recovery problems, can be operated in electric current discrete state and electric current continuous state simultaneously.
Embodiment two
As shown in Figure 5, be the non-bridge PFC boost rectifier circuit structure chart of present embodiment.The non-bridge PFC boost rectifier first energy storage inductor L1, filter capacitor C1, and by rectifier bridge upper left, upper right, that four brachium pontis in lower-left and bottom right are formed.Alternating current input power supplying is AC, the first energy storage inductor L1 is connected in series between AC power AC forward output and the upper left brachium pontis input of rectifier bridge, filter capacitor C1 is connected in parallel between upper left brachium pontis output and the lower-left brachium pontis input, and alternating voltage is exported the work for load resistance Load behind the non-bridge PFC boost rectifier.
Wherein, upper right brachium pontis is made up of N-channel MOS FET pipe S5.The bottom right brachium pontis is made up of N-channel MOS FET pipe S6.The source electrode of upper right brachium pontis MOSFET pipe S5 is connected with the drain electrode of the MOSFET pipe S6 of bottom right brachium pontis.Upper left brachium pontis composes in parallel with a fast recovery diode D1 after by first N-channel MOS FET pipe S1 and second N-channel MOS FET pipe S2 series connection again, and two MOSFET pipe S1 and S2 pass through source series.The lower-left brachium pontis composes in parallel with a fast recovery diode D2 after by the 3rd N-channel MOS FET pipe S3 and the 4th N-channel MOS FET pipe S4 series connection again, and two MOSFET pipe S3 and S4 pass through source series.The drain electrode of MOSFET pipe S2 is connected with the drain electrode of the MOSFET pipe S3 of lower-left brachium pontis.
As shown in Figure 6, be the non-bridge PFC boost rectifier of the present embodiment work wave schematic diagram under the electric current continuous state when the positive half cycle of input voltage, VGS1, VGS2, VGS3, VGS4, VGS6 are respectively the control signal driving voltages of MOSFET pipe S1, S2, S3, S4 and S6 among the figure, VL1, IL1 are respectively voltage, the electric currents of the first energy storage inductor L1, VDS3+VSD4 is the voltage between MOSFET S3 drain electrode and the S4 drain electrode, ID1 is the electric current among the diode D1, and IDS3 is the electric current among the MOSFET pipe S3.
Its course of work is as follows: with the positive half cycle of input voltage is example, MOSFET pipe S6 conducting always, and MOSFET pipe S5 ends.MOSFET pipe S3, the S4 of lower-left brachium pontis become main switch, and MOSFET pipe S1, the S2 of upper left brachium pontis become the continued flow switch pipe.
At t0-t1 constantly, MOSFET pipe S3 and S4 are open-minded, and MOSFET pipe S1, S2 turn-off, the first energy storage inductor L1 energy storage, and current direction is: L1, S3, S4, S6, AC power supplies.
At t1-t2 constantly, MOSFET pipe S3, S4 turn-off, and MOSFET pipe S1, S2 turn-off, and inductance L 1 energy stored discharges through diode D1.Current direction is L1, D1, Load, S6, AC power supplies.
At t2-t3 constantly, S1, S2 are open-minded for the MOSFET pipe, and the current transfer among the diode D1 is managed among S1, the S2 to MOSFET.Current direction is L1, S2, S1, Load S6, AC power supplies.
At t3-t4 constantly, MOSFET pipe S1, S2 turn-off, and electric current is managed S1, S2 from MOSFET and transferred to the diode D1, and current direction is L1, D1, Load, S6, AC power supplies.
In the t4 moment, S3, S4 are open-minded for the MOSFET pipe, inductance L 1 charging, and following one-period will begin.
When the input voltage negative half period, MOSFET pipe S5 conducting always, MOSFET pipe S6 ends.Its course of work is similar with positive half cycle, and just MOSFET pipe S1, S2 become main switch, and MOSFET pipe S3, S4 become the continued flow switch pipe.
The non-bridge PFC boost rectifier of present embodiment, the fly-wheel diode of pfc circuit changed into by the series connection of two MOSFET pipes composed in parallel the MOSFET bidirectional switch with a fast recovery diode again, utilize MOSFET conduction loss features of smaller, reduced the conduction loss of circuit, the body diode of two MOSFET shields mutually simultaneously, fast recovery diode afterflow by in parallel has with it solved reverse-recovery problems, can be operated in electric current discrete state and electric current continuous state simultaneously.Simultaneously, the diode at a slow speed that in the pfc circuit power frequency conducting turn-offed has also changed the MOSFET pipe into, can further reduce the conduction loss of circuit, improves system effectiveness.
In addition, upper right brachium pontis and bottom right brachium pontis also can be formed by a diode in the non-bridge PFC boost rectifier of present embodiment, the negative electrode coupling of the diode of the anode of the diode of upper right brachium pontis and bottom right brachium pontis.If form upper right brachium pontis and bottom right brachium pontis with diode, the circuit turn-on loss that the circuit turn-on loss ratio is formed upper right brachium pontis and bottom right brachium pontis with the MOSFET pipe wants big, but device cost is lower, also is a kind of selectable circuit connecting mode.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, make some substituting or obvious modification under the prerequisite of the utility model design not breaking away from, and performance or purposes are identical, all should be considered as belonging to protection range of the present utility model.
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| CN2009202620198U CN201682429U (en) | 2009-12-23 | 2009-12-23 | Bridgeless PFC boost rectifier |
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| CN2009202620198U CN201682429U (en) | 2009-12-23 | 2009-12-23 | Bridgeless PFC boost rectifier |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102130580A (en) * | 2011-03-30 | 2011-07-20 | 艾默生网络能源系统北美公司 | A Totem Pole Bridgeless Power Factor Correction Circuit |
| CN102647099A (en) * | 2011-02-22 | 2012-08-22 | 艾默生网络能源系统北美公司 | A combined switch and synchronous rectification circuit |
| CN102723851A (en) * | 2011-03-29 | 2012-10-10 | 艾默生网络能源系统北美公司 | Bridge arm circuit |
| CN102857129A (en) * | 2011-06-29 | 2013-01-02 | 艾默生网络能源有限公司 | Rectifier circuit |
| CN102957308A (en) * | 2011-08-31 | 2013-03-06 | 艾默生网络能源有限公司 | Bridgeless PFC (power factor correction) circuit |
| CN103312202A (en) * | 2012-03-14 | 2013-09-18 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Inverter topology in high frequency application and control method of inverter topology |
| CN103889131A (en) * | 2014-04-16 | 2014-06-25 | 杨岳毅 | Novel non-bridge LED driving power supply |
| CN104300810A (en) * | 2013-07-17 | 2015-01-21 | 台达电子企业管理（上海）有限公司 | Power factor correction converter and control method |
| CN104811076A (en) * | 2014-01-28 | 2015-07-29 | 台达电子企业管理（上海）有限公司 | Inverter and control method thereof |
| CN105453380A (en) * | 2013-06-21 | 2016-03-30 | 通用汽车环球科技运作有限责任公司 | Apparatus and method for grid-to-vehicle battery charging |
| CN105790614A (en) * | 2016-04-07 | 2016-07-20 | 深圳市高斯宝电气技术有限公司 | Bridgeless PFC switch power circuit |
| CN106100313A (en) * | 2015-04-27 | 2016-11-09 | 松下知识产权经营株式会社 | Power circuit |
| CN106655859A (en) * | 2016-08-19 | 2017-05-10 | 南京航空航天大学 | Bridge arm of motor driving circuit and control method thereof |
| CN106911262A (en) * | 2015-12-22 | 2017-06-30 | 华为技术有限公司 | Two-way changing circuit and reversible transducer |
| JP2017216864A (en) * | 2016-05-26 | 2017-12-07 | パナソニックＩｐマネジメント株式会社 | Power conversion circuit and power transmission system |
| JP2017216865A (en) * | 2016-05-25 | 2017-12-07 | パナソニックＩｐマネジメント株式会社 | Power conversion circuit and power transmission system |
| CN109672338A (en) * | 2019-01-31 | 2019-04-23 | 北京汇能精电科技股份有限公司 | A kind of BUCK circuit of positive system altogether |
| WO2024223058A1 (en) * | 2023-04-28 | 2024-10-31 | Huawei Digital Power Technologies Co., Ltd. | Power supply with hold-up time extension |
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2009
- 2009-12-23 CN CN2009202620198U patent/CN201682429U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102647099A (en) * | 2011-02-22 | 2012-08-22 | 艾默生网络能源系统北美公司 | A combined switch and synchronous rectification circuit |
| WO2012113248A1 (en) * | 2011-02-22 | 2012-08-30 | 艾默生网络能源系统北美公司 | Combined switch and synchronous rectification circuit |
| CN102723851B (en) * | 2011-03-29 | 2015-08-26 | 艾默生网络能源系统北美公司 | A kind of bridge arm circuit |
| CN102723851A (en) * | 2011-03-29 | 2012-10-10 | 艾默生网络能源系统北美公司 | Bridge arm circuit |
| CN102130580A (en) * | 2011-03-30 | 2011-07-20 | 艾默生网络能源系统北美公司 | A Totem Pole Bridgeless Power Factor Correction Circuit |
| CN102857129A (en) * | 2011-06-29 | 2013-01-02 | 艾默生网络能源有限公司 | Rectifier circuit |
| CN102857129B (en) * | 2011-06-29 | 2015-10-21 | 艾默生网络能源有限公司 | A kind of rectification circuit |
| CN102957308A (en) * | 2011-08-31 | 2013-03-06 | 艾默生网络能源有限公司 | Bridgeless PFC (power factor correction) circuit |
| CN103312202A (en) * | 2012-03-14 | 2013-09-18 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Inverter topology in high frequency application and control method of inverter topology |
| CN103312202B (en) * | 2012-03-14 | 2016-05-04 | 山特电子（深圳）有限公司 | Inverter topology in frequency applications and control method thereof |
| CN105453380A (en) * | 2013-06-21 | 2016-03-30 | 通用汽车环球科技运作有限责任公司 | Apparatus and method for grid-to-vehicle battery charging |
| CN105453380B (en) * | 2013-06-21 | 2018-09-21 | 通用汽车环球科技运作有限责任公司 | The device and method that battery for power grid to vehicle charges |
| CN104300810A (en) * | 2013-07-17 | 2015-01-21 | 台达电子企业管理（上海）有限公司 | Power factor correction converter and control method |
| CN104811076A (en) * | 2014-01-28 | 2015-07-29 | 台达电子企业管理（上海）有限公司 | Inverter and control method thereof |
| CN104811076B (en) * | 2014-01-28 | 2018-03-16 | 台达电子企业管理（上海）有限公司 | Inverter and its control method |
| CN103889131A (en) * | 2014-04-16 | 2014-06-25 | 杨岳毅 | Novel non-bridge LED driving power supply |
| CN106100313A (en) * | 2015-04-27 | 2016-11-09 | 松下知识产权经营株式会社 | Power circuit |
| CN106911262A (en) * | 2015-12-22 | 2017-06-30 | 华为技术有限公司 | Two-way changing circuit and reversible transducer |
| CN106911262B (en) * | 2015-12-22 | 2019-05-21 | 华为技术有限公司 | Two-way changing circuit and reversible transducer |
| US10666164B2 (en) | 2015-12-22 | 2020-05-26 | Huawei Technologies Co., Ltd. | Bidirectional power conversion circuit and bidirectional power converter |
| CN105790614A (en) * | 2016-04-07 | 2016-07-20 | 深圳市高斯宝电气技术有限公司 | Bridgeless PFC switch power circuit |
| CN105790614B (en) * | 2016-04-07 | 2019-01-25 | 深圳市高斯宝电气技术有限公司 | A kind of non-bridge PFC switching power circuit |
| JP2017216865A (en) * | 2016-05-25 | 2017-12-07 | パナソニックＩｐマネジメント株式会社 | Power conversion circuit and power transmission system |
| JP2017216864A (en) * | 2016-05-26 | 2017-12-07 | パナソニックＩｐマネジメント株式会社 | Power conversion circuit and power transmission system |
| CN106655859A (en) * | 2016-08-19 | 2017-05-10 | 南京航空航天大学 | Bridge arm of motor driving circuit and control method thereof |
| CN106655859B (en) * | 2016-08-19 | 2019-10-11 | 南京航空航天大学 | Bridge arm for motor drive circuit and control method thereof |
| CN109672338A (en) * | 2019-01-31 | 2019-04-23 | 北京汇能精电科技股份有限公司 | A kind of BUCK circuit of positive system altogether |
| WO2024223058A1 (en) * | 2023-04-28 | 2024-10-31 | Huawei Digital Power Technologies Co., Ltd. | Power supply with hold-up time extension |
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Address after: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |
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Granted publication date: 20101222 |