CN101295936B - Exterior feeding control power supply of high voltage frequency convertor power unit - Google Patents
Exterior feeding control power supply of high voltage frequency convertor power unit Download PDFInfo
- Publication number
- CN101295936B CN101295936B CN2007100988285A CN200710098828A CN101295936B CN 101295936 B CN101295936 B CN 101295936B CN 2007100988285 A CN2007100988285 A CN 2007100988285A CN 200710098828 A CN200710098828 A CN 200710098828A CN 101295936 B CN101295936 B CN 101295936B
- Authority
- CN
- China
- Prior art keywords
- power supply
- control
- circuit
- output
- high voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The invention relates to a control power source, in particular to an outer power supply control circuit of high voltage transducer power units. The control power source output is corresponding connected with each power unit, which comprises a power source, a plurality of boost isolation transformers and a rectification voltage-stabilizing circuit connected with the output ends of the plurality of boost isolation transformers. The control power source of the invention is characterized in that: the power source is a DC power source; a high-frequency inverting circuit is arranged between the DC power source and the plurality of boost isolation transformers; the output of the DC power source is connected with the DC input end of the high-frequency inverting circuit; the high-frequency AC output end of the high-frequency inverting circuit is connected with the primary winding series circuits of the plurality of boost isolation transformers. The outer power supply control circuit of the invention not only easily guarantees the high voltage isolation of all the control circuits of all the power units, but also causes the control power source to be provided by the exterior of the power units, thus increasing the control reliability of the power units and being convenient for the system to carry out modulation.
Description
Technical field
The present invention relates to a kind of control power supply, particularly a kind of control power supply that is used for the externally fed of power unit cascade type high voltage frequency changer or multi-level high-voltage frequency transformer power cell.
Technical background
At present, power unit cascade type high voltage frequency changer has been widely used in the speed governing of high-voltage three-phase asynchronous motor.In this frequency converter, adopt the mode of a plurality of low pressure and low power units in series to realize direct high pressure, power to power cell after the isolating transformer step-down of line voltage through multipleization of secondary winding, single-phase frequency conversion power unit output is together in series, realize the high pressure output of variable voltage variable frequency, supply with high-tension motor.Adopt this technology, the mature technology that utilizes low voltage frequency converter and inexpensive device can realize the high voltage converter of various different electric pressures; Low frequency modulations by each power cell can obtain desirable high frequency modulated effect; Series connection by power cell can realize the many level PWMs of high pressure.Applied range drives the efficient height, and is easy to maintenance, can satisfy the harsh requirement of IEEE519-1992 in whole operating load scope.
In the power cell of existing unit cascade high voltage converter and multi-level high-voltage frequency transformer, the many input power cords of the power supply of unit controls circuit from the unit, by Switching Power Supply it is transformed into the needed various direct voltages of power cell, or earlier by carrying out conversion after the transformer step-down again.
In addition, it is not to be provided but a kind of supply power mode of being provided by the additional secondary winding of main transformer by the unit power input line that utility model CN02255853 " a kind of medium voltage converter power control " discloses the control of a kind of power cell, and its structure as shown in Figure 1.On main transformer 1, be provided with auxiliary secondary winding, power frequency high voltage is become power frequency low pressure, auxiliary secondary winding two ends connect the series circuit of the elementary winding of a plurality of high frequency magnet ring isolating transformers 2, the output linkage unit control circuit 3 of high frequency magnet ring isolating transformer 2, thereby, control each power cell 4 to 3 power supplies of unit controls circuit.
There is following disadvantage in the supply power mode of above-mentioned control power supply:
1, the input of the electric power of power cell control circuit is all from high-voltage fence, and high-voltage fence often is connected to multiple load, and fluctuation often appears in line voltage, even instantaneous power-down occurs, causes high voltage converter work out of control.
2, when the power cell operation irregularity, the input fuse often burns, cause the control power supply of power cell to power, not only with the communication disruption of frequency transformer main control system, and can make the bypass excision of power cell to realize, thereby the operational reliability of whole frequency converter is significantly reduced.
3, pass through the combination of power frequency step-down transformer and duplex frequency boostering transformer, realized the power supply of power cell, because energy transmits with power frequency, the core volume of step-up transformer (high frequency magnet ring isolating transformer) is too huge, take space in a large amount of machines, thereby be difficult to use.
Summary of the invention
Technical problem to be solved by this invention is the above-mentioned deficiency at prior art, and a kind of externally fed control power supply that is not subjected to the high voltage transducer power unit that the power cell operating state influences is provided.
Realize that technical scheme of the present invention is as follows.
A kind of externally fed control power supply of high voltage transducer power unit, corresponding each power cell that connects of the output of this control power supply, comprise: power supply, a plurality of regulator rectifier circuits that boost isolating transformer and connect a plurality of isolating transformer outputs that boost, it is characterized in that: described power supply is a DC power supply, described DC power supply and a plurality of boosting are provided with high-frequency inverter circuit between the isolating transformer, the output of described DC power supply connects the direct-flow input end of described high-frequency inverter circuit, the series circuit of the described a plurality of elementary windings of isolating transformer that boost of high-frequency ac output termination of described high-frequency inverter circuit.
The externally fed control power supply of described high voltage transducer power unit, it is characterized in that: described DC power supply is that electric main forms through rectifying and wave-filtering, or is directly powered by other DC power supply.
The externally fed control power supply of described high voltage transducer power unit is characterized in that: described high-frequency inverter circuit is to be constituted at the LC series resonant circuit more than the 20KHz with resonance frequency, specifically be to be connected in series two output lines of described LC series resonant circuit or inverter by transformer coupled described LC series resonant circuit between two output lines of described full inverter by four bridge-type inverters that switching tube constituted.
The externally fed control power supply of described high voltage transducer power unit is characterized in that: described switching tube is field effect transistor or IGBT pipe.
The externally fed of described high voltage transducer power unit control power supply is characterized in that: the described isolating transformer that boosts is the high frequency isolating transformer that boosts, and its input winding forms with the high-voltage insulating wire coiling.
The externally fed control power supply of described high voltage transducer power unit, it is characterized in that: the input winding of the described isolating transformer that boosts is single turn, two circle or multiturn.
The externally fed control power supply of described high voltage transducer power unit, it is characterized in that: be provided with current sensor in the output of described high-frequency inverter circuit and the series loop of the elementary winding of isolating transformer that boosts, the operating state that is used for FEEDBACK CONTROL high-frequency inverter switching tube is with the control output current.
The externally fed control power supply of described high voltage transducer power unit, it is characterized in that: the input in described inverter is provided with switching tube, be provided with fly-wheel diode and filter circuit between another input of described output end of switching tube and inverter, the control utmost point joint detection drive circuit of described switching tube, and be controlled by the detected output current value of current sensor; Described switching tube is field effect transistor or IGBT.
The externally fed control power supply of described high voltage transducer power unit, it is characterized in that: described current sensor is a Hall element, or shunt, and is serially connected with choking coil on the output signal line of shunt.
The externally fed control power supply of described high voltage transducer power unit is characterized in that: the control power supply of described externally fed also has the output of the control circuit power supply beyond transducer power unit.
The invention has the beneficial effects as follows:
1, control power supply of the present invention adopts externally fed, when voltage fluctuation, instantaneous power-down appear in high-voltage fence, can guarantee that high voltage converter still is in comprehensive slave mode, has reduced the operation stability of frequency converter under abnormality.
2, control power supply of the present invention adopts externally fed, when the power cell operation irregularity, when the input fuse burns, can continue and Frequency Converter Control system communication, realizes the Bypass Control to power cell, thereby improves the operational reliability of whole frequency converter.
3, be provided with high-frequency inverter circuit between input rectifying filter circuit of the present invention and a plurality of step-up transformer, make step-up transformer be operated in the above high frequency of 20KHz, dwindled the magnet ring volume of step-up transformer, not only reduced space in the machine that takies, and reduced material cost.
Description of drawings
Fig. 1 is existing power cell control circuit externally fed power supply block diagram.
Fig. 2 is the power supply block diagram of power cell control circuit of the present invention.
Fig. 3 is power supply embodiment one schematic diagram of power cell control circuit of the present invention.
Fig. 4 is voltage current waveform and the corresponding bridge-type inverter on off state figure of embodiment 1.
Fig. 5 is power supply embodiment two schematic diagrames of power cell control circuit of the present invention.
Fig. 6 is power supply embodiment three schematic diagrames of power cell control circuit of the present invention.
Fig. 7 is electric current and voltage and the corresponding bridge-type inverter on off state figure of embodiment 3.
Embodiment
The present invention is for when the input fuse of high-voltage fence powered-off fault and unit cascaded type or multi-level high-voltage frequency transformer power cell burns, can continue to communicate by letter with frequency transformer main control system, realization is to the various controls of power cell, and a kind of control power supply that adopts externally fed is provided.The control power supply that described externally fed control power supply is meant power cell is self obtaining from power cell not, but from other supply line, for example obtain on the auxiliary control source line of slave unit erecting bed, or obtain from electric main, if obtain from alternating current, then must become direct current as shown in Figure 5, also can directly power by other DC power supply through rectifying and wave-filtering.
The circuit structure of control power supply of the present invention as shown in Figure 2, corresponding each power cell that connects of its output, it comprises: DC power supply 30 and the regulator rectifier circuit 50 that connects a plurality of isolating transformer 40 outputs that boost; For reducing volume, be provided with high-frequency inverter circuit 60 between the isolating transformer 40 in described DC power supply 30 and a plurality of boosting, the output of described DC power supply 30 connects the input of described high-frequency inverter circuit 60, the series circuit of the described a plurality of isolating transformer 40 elementary windings that boost of high-frequency ac output termination of described high-frequency inverter circuit 60.Described DC power supply can obtain from electric main or from the auxiliary secondary winding of frequency converter main transformer.Also be provided with and detect drive circuit 70, described detection drive circuit 70 is by the output current of current sensor 80 (referring to Fig. 3) detection high-frequency inverter circuit 60, the work of FEEDBACK CONTROL high-frequency inverter circuit 60.
Embodiment one
Fig. 3 is the particular circuit configurations figure of the embodiment of the invention one.High-frequency inverter circuit 60 described in the embodiment one is by four switching tube Q1, Q2, Q3, bridge-type inverter that Q4 constituted and the resonance frequency LC series resonant circuit more than 20KHz constitutes, specifically be that two ends after the elementary windings in series of described LC series resonant circuit and a plurality of isolating transformers 40 that boost are connected respectively with two outputs of described bridge-type inverter, each secondary winding of a plurality of isolating transformers 40 that boost is respectively by regulator rectifier circuit 50 (regulator rectifier circuit 1, regulator rectifier circuit 2... regulator rectifier circuit n) respectively control circuit and other control circuits of each power cell are powered.
Be provided with current sensor 80 in the output of described high-frequency inverter circuit 60 and the series loop of the elementary winding of isolating transformer that boosts, described current sensor joint detection drive circuit 70, the output that detects drive circuit 70 connects the control utmost point of the switching tube Q1～Q4 of high-frequency inverter circuit, detect output current size and Orientation and setting current i ref contrast that drive circuit 70 arrives according to current sensor senses, the operating state of FEEDBACK CONTROL high-frequency inverter circuit switching tube is with the control output current.
Described current sensor is a Hall element, or shunt, if adopt shunt, then is connected in series choking coil on the output signal line of shunt.It in the illustrated embodiment Hall element.
Fig. 4 is the voltage current waveform and the corresponding bridge-type inverter switching tube work sheet of the embodiment of the invention 1.Concrete corresponding relation sees Table 1
Table 1
| The T1 period | Q1, Q4 conducting, Q2, Q3 end | Vc rises, and whether the iL vibration commutates during according to the peak value decision iL zero passage of iL | | iL|＜iref becomes Q2, Q3 conducting |
| The T2 period | Q2, Q3 conducting Q1, Q4 end | Vc descends, and whether the iL vibration commutates during according to the peak value decision iL zero passage of iL | | iL|＜iref becomes Q1, Q4 conducting |
| The T3 period | Q1, Q4 conducting Q2, Q3 end | Vc rises, and whether the iL vibration commutates during according to the peak value decision iL zero passage of iL | | iL|〉iref, become Q1, Q3 conducting |
| The T4 period | Q1, Q3 conducting | Vc, iL decay naturally, | |iL|>iref， |
| Q2, Q4 end | Whether commutate during according to the peak value of iL decision iL zero passage | Still be Q1, Q3 conducting | |
| The T5 period | Q1, Q3 conducting Q2, Q4 end | Whether Vc, iL decay naturally, commutate during according to the peak value of iL decision iL zero passage | | iL|〉iref still is Q1, Q3 conducting |
| The T6 period | Q1, Q3 conducting Q2, Q4 end | Whether Vc, iL decay naturally, commutate during according to the peak value of iL decision iL zero passage | | iL|＜iref becomes Q1, Q4 conducting |
| The T7 period | Q1, Q4 conducting Q2, Q3 end | Vc descends, and whether the iL vibration commutates during according to the peak value decision iL zero passage of iL | | iL|＜iref becomes Q2, Q3 conducting |
| The T8 period | Q2, Q3 conducting Q1, Q4 end | Vc descends, and whether the iL vibration commutates during according to the peak value decision iL zero passage of iL | | iL|〉iref, become Q2, Q4 conducting |
| The T9 period | Q2, Q4 conducting Q1, Q3 end | Whether Vc, iL decay naturally, commutate during according to the peak value of iL decision iL zero passage | | iL|〉iref still is Q2, Q4 conducting |
| The T10 period | Q2, Q4 conducting Q1, Q3 end | Whether Vc, iL decay naturally, commutate during according to the peak value of iL decision iL zero passage | | iL|＜iref becomes Q2, Q3 conducting |
Embodiment one
Fig. 5 is the circuit diagram of the embodiment of the invention two.Among the embodiment two, described high-frequency inverter circuit 60 ' be by four switching tubes Q1, Q2, Q3, Q4 constituted bridge-type inverter and the LC series circuit of resonance frequency more than 20KHz constitute, different with embodiment one is: described power supply is an AC power, described AC power converts interchange to direct current supply high frequency inverter circuit 60 ' through rectifying and wave-filtering capacitor C 1, is provided with filter capacitor C1 in the described filter circuit; Two outputs in described bridge-type inverter are connected by high frequency transformer T with the circuit of a plurality of isolating transformers 40 that boost of described LC series resonant circuit serial connection.The output of series resonant circuit connects the primary series circuit of a plurality of isolating transformers 40 that boost, and each of a plurality of isolating transformers 40 that boost is secondary powers to control circuit and other control circuits of each power cell respectively by regulator rectifier circuit 50 (regulator rectifier circuit 1, regulator rectifier circuit 2... regulator rectifier circuit n) respectively.The output that detects drive circuit 70 connects the control utmost point of the switching tube of inverter, detect drive circuit 70 according to current sensor 80 detected output current size and Orientations and the contrast of setting electric current, the operating state of FEEDBACK CONTROL high-frequency inverter switching tube is with the control output current.
Embodiment three
Fig. 6 is the circuit diagram of the embodiment of the invention three.Be with the difference of embodiment one, in embodiment three, the input of described inverter is provided with between another input of the output of switching tube Q0, described switching tube Q0 and inverter and is provided with sustained diode and LC filter circuit, and described switching tube Q0 is controlled by the detected output current value of current sensor.The control utmost point joint detection drive circuit 70 of described switching tube Q0.Detect drive circuit 70 and switching tube Q0 is carried out PWM control, can adjust the output current of inverter circuit according to current sensor 80 detected size of current.
In embodiment three, switching tube Q1, the Q2 in the inverter circuit, the operating state of Q3, Q4 are determined by the detected sense of current of current sensor.Fig. 7 is electric current and voltage and the corresponding bridge-type inverter on off state figure of embodiment three.
In Fig. 7, as inductive current iL〉0 the time, as T1, T5, T7, T9 period, Q1 and Q4 conducting, Q2 and Q3 end; IL＜0 o'clock, as T2, T4, T8, T9 period, Q2 and Q3 conducting, Q1 and Q4 end; Each commutation all appears at the zero crossing of current i L.In T1, T2 period, the duty ratio of Q0 control impuls is less, and the resonance current of acquisition is lower than fiducial value, and the duty ratio that detects drive circuit control Q0 increases, and current i L amplitude is increased.In T4, T5 period, Q0 control impuls duty ratio is bigger, and the resonance current of acquisition is higher than the current reference value, and the duty ratio that detects drive circuit control Q0 reduces, and current i L amplitude is descended.Reach balance until Q0 duty ratio and resonance current.
Obviously, similar with embodiment three, embodiment one, embodiment two also can be provided with switching tube on the input of described inverter, described switching tube is controlled by the detected output current value of current sensor, detect drive circuit and switching tube is carried out PWM control, with the output current of control inverter circuit according to the detected size of current of current sensor; The inverse switch pipe then is controlled by the direction of inverter circuit output current fully.
The Q0 of switching tube described in the various embodiments described above, Q1, Q2, Q3, Q4 are field effect transistor or IGBT pipe; The described isolating transformer 40 that boosts is the high frequency isolating transformers that boost, and its input winding forms with the high-voltage insulating wire coiling.Described input winding is single turn, two circle or multiturn.
The output of above-mentioned high-frequency inverter circuit is provided with current sensor 80 with the series loop of the elementary winding of isolating transformer that boosts, and is used for the output current of FEEDBACK CONTROL high-frequency inverter circuit.Described current sensor 80 is Hall elements, or shunt, and is serially connected with choking coil is used to remove alternating component on the output signal line of shunt.
The control power supply of described externally fed also has the output of the control circuit power supply beyond transducer power unit.
Claims (9)
1. the externally fed of a high voltage transducer power unit is controlled power supply, corresponding each power cell that connects of the output of this control power supply, comprise: power supply, a plurality of regulator rectifier circuits that boost isolating transformer and connect a plurality of isolating transformer outputs that boost, it is characterized in that: described power supply is a DC power supply, described DC power supply and a plurality of boosting are provided with high-frequency inverter circuit between the isolating transformer, the output of described DC power supply connects the direct-flow input end of described high-frequency inverter circuit, the series circuit of the described a plurality of elementary windings of isolating transformer that boost of the output termination of described high-frequency inverter circuit, be provided with current sensor in the output of described high-frequency inverter circuit and the series loop of the elementary winding of isolating transformer that boosts, the operating state that is used for FEEDBACK CONTROL high-frequency inverter circuit switching tube is with the control output current, direct-flow input end in described high-frequency inverter circuit is provided with switching tube, be provided with fly-wheel diode and filter circuit between another direct-flow input end of described output end of switching tube and high-frequency inverter circuit, the control utmost point joint detection drive circuit of described switching tube, and be controlled by the detected output current value of current sensor: described switching tube is field effect transistor or IGBT.
2. the externally fed of high voltage transducer power unit according to claim 1 is controlled power supply, and it is characterized in that: described DC power supply is that electric main forms through rectifying and wave-filtering, or is directly powered by other DC power supply.
3. the externally fed of high voltage transducer power unit according to claim 1 is controlled power supply, it is characterized in that: described high-frequency inverter circuit is that the LC series resonant circuit more than 20KHz constitutes by four bridge-type inverters that switching tube constituted and resonance frequency, specifically is that two output lines that are connected in series described LC series resonant circuit or bridge-type inverter between two output lines of described bridge-type inverter close described LC series resonant circuit by the transformer lotus root.
4. the externally fed of high voltage transducer power unit according to claim 3 control power supply is characterized in that, described switching tube is field effect transistor or IGBT pipe.
5. the externally fed of high voltage transducer power unit according to claim 1 control power supply is characterized in that: the described isolating transformer that boosts is the high frequency isolating transformer that boosts, and its input winding forms with the high-voltage insulating wire coiling.
6. the externally fed of high voltage transducer power unit according to claim 1 is controlled power supply, and it is characterized in that: the input winding of the described isolating transformer that boosts is single turn, two circle or multiturn.
7. the externally fed of high voltage transducer power unit according to claim 1 is controlled power supply, and it is characterized in that: described current sensor is a Hall element.
8. the externally fed of high voltage transducer power unit according to claim 1 control power supply is characterized in that, the control power supply of described externally fed also has the output of the control circuit power supply beyond transducer power unit.
9. the externally fed of high voltage transducer power unit according to claim 1 is controlled power supply, and it is characterized in that: described current sensor is shunt and is serially connected with choking coil on the output signal line of shunt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100988285A CN101295936B (en) | 2007-04-27 | 2007-04-27 | Exterior feeding control power supply of high voltage frequency convertor power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100988285A CN101295936B (en) | 2007-04-27 | 2007-04-27 | Exterior feeding control power supply of high voltage frequency convertor power unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101295936A CN101295936A (en) | 2008-10-29 |
| CN101295936B true CN101295936B (en) | 2011-01-26 |
Family
ID=40066014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100988285A Active CN101295936B (en) | 2007-04-27 | 2007-04-27 | Exterior feeding control power supply of high voltage frequency convertor power unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101295936B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112532070A (en) * | 2020-11-26 | 2021-03-19 | 核工业西南物理研究院 | Power supply circuit for PSM high-voltage power supply control and application thereof |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2377225B1 (en) * | 2008-12-17 | 2013-02-20 | Vestas Wind Systems A/S | Method and system for testing wind turbine plants |
| CN101860210B (en) * | 2010-05-12 | 2012-04-25 | 天津大学 | Novel boost chopper cascade structure |
| CN102520626B (en) * | 2011-12-16 | 2013-12-11 | 山东电力集团公司菏泽供电公司 | Power supply control system of field on-line monitoring device |
| CN106787826B (en) * | 2017-04-01 | 2023-10-31 | 广东商鼎智能设备有限公司 | Power panel and power panel system |
| CN107128196A (en) * | 2017-05-17 | 2017-09-05 | 安徽理工大学 | mining electric locomotive wireless power supply system |
| CN107896067A (en) * | 2018-01-03 | 2018-04-10 | 洛阳源创电气有限公司 | A kind of frequency conversion power unit of the more H bridges inversion outputs of single input |
| CN109818414B (en) * | 2019-03-15 | 2024-08-23 | 谢志和 | AC-DC conversion power supply system |
| CN110912417A (en) * | 2019-10-28 | 2020-03-24 | 中国人民解放军96782部队 | Portable high-frequency low-voltage power supply device for drum tamping bar |
| CN112532082B (en) * | 2020-11-26 | 2021-11-16 | 核工业西南物理研究院 | High-frequency converter applied to PSM high-voltage power supply and PSM high-voltage power supply |
| CN113437762B (en) * | 2021-07-30 | 2023-11-03 | 易事特集团股份有限公司 | Photovoltaic inverter power system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1725620A (en) * | 2004-07-22 | 2006-01-25 | 郑州正鸿电气有限责任公司 | AC-DC two-purpose high voltage small current power supply |
| CN1750375A (en) * | 2005-08-11 | 2006-03-22 | 浙江大学 | Resonant current transformer with secondary element device voltage stress is half of output voltage |
-
2007
- 2007-04-27 CN CN2007100988285A patent/CN101295936B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1725620A (en) * | 2004-07-22 | 2006-01-25 | 郑州正鸿电气有限责任公司 | AC-DC two-purpose high voltage small current power supply |
| CN1750375A (en) * | 2005-08-11 | 2006-03-22 | 浙江大学 | Resonant current transformer with secondary element device voltage stress is half of output voltage |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112532070A (en) * | 2020-11-26 | 2021-03-19 | 核工业西南物理研究院 | Power supply circuit for PSM high-voltage power supply control and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101295936A (en) | 2008-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101295936B (en) | Exterior feeding control power supply of high voltage frequency convertor power unit | |
| CN103703663B (en) | A kind of device for reducing resonant-mode power supply | |
| CN108462396B (en) | Controllable high-voltage direct-current power supply of 35kV oscillatory wave system | |
| CN105932880A (en) | Magnetizing Current Based Control Of Resonant Converters | |
| CN101166001A (en) | Active bi-directional electric power adjuster | |
| US11451091B2 (en) | Converter | |
| CN100420135C (en) | Push-pull converter and method for power supply device and uninterrupted power supply system | |
| CN109951084B (en) | High-power high-transformation-ratio resonant DC power supply and working method thereof | |
| CN109889048A (en) | A kind of isolation bidirectional DC-DC converter | |
| CN105337505A (en) | DC/DC conversion circuit and power supply device | |
| CN104167938A (en) | Pulsating current stabilizing control system | |
| TW201325057A (en) | A DC-to-DC voltage regulator and the operating method thereof | |
| CN104065283A (en) | Bridge-free type PRC alternating-current-to-direct-current power converter | |
| CN102074971A (en) | Feedback load energy-saving circuit for aging test and control method thereof | |
| CN215186536U (en) | Motor controller and motor using same | |
| CN103765754A (en) | Inverter with coupled inductances | |
| CN112350583B (en) | Current type push-pull bridge type soft switch bidirectional direct current converter | |
| CN201878014U (en) | Feedback load energy-saving circuit for aging testing | |
| CN101510103A (en) | Secondary voltage relief switch stable voltage power source | |
| CN205646960U (en) | Rectification charging device | |
| CN105490548A (en) | Switching power device | |
| US11791739B2 (en) | AC-AC converter | |
| CN101860245A (en) | Medium-power two-stage three-phase static converter | |
| KR100439414B1 (en) | DC/DC converter of Insulation type and Uninterruptible power supply used the same apparatus | |
| CN104467431B (en) | Dynamic voltage scaling power control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100043 West Street, Shijingshan District, Beijing, No. 19 Patentee after: Beijing Kang Kang Xin Polytron Technologies Inc Address before: 100043 West Street, Shijingshan District, Beijing, No. 19 Patentee before: Beijing Hiconics Drive Technology Co.,Ltd. |