CN105846549B - A kind of contactless power transmission system and control method - Google Patents
A kind of contactless power transmission system and control method Download PDFInfo
- Publication number
- CN105846549B CN105846549B CN201510015953.XA CN201510015953A CN105846549B CN 105846549 B CN105846549 B CN 105846549B CN 201510015953 A CN201510015953 A CN 201510015953A CN 105846549 B CN105846549 B CN 105846549B
- Authority
- CN
- China
- Prior art keywords
- frequency
- rectifier
- power
- transmission system
- power transmission
- 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
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Landscapes
- Inverter Devices (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of contactless power transmission system and control methods, system includes sending end, receiving end and control unit, control unit includes a current controller and switch signal generator, the feedback input end of current controller receive it is filtered after high-frequency inverter DC side current detection signal, the given input terminal of current controller receives signal of the voltage detection signal of the communication power supply after absolute value converts and is multiplied by coefficient G, the output of the current controller connects the input terminal of the switch signal generator, the output of the switch signal generator connects high-frequency inverter/hf rectifier power switch control terminal.The unity power factor of communication power supply can be realized without pfc circuit by the present invention, reduce the complexity, volume and cost of system.
Description
Technical field
The present invention relates to a kind of contactless power transmission system and control methods.
Background technology
Contactless (or wireless) power transmission techniques (not insert by conducting wire and plug between sending end and receiving end
Seat) connection, have Electrical Safety, it is reliable, the series of advantages such as facilitate, filled particularly suitable for charging of mobile devices, electric vehicle
Electric (power supply) and inflammable (quick-fried) and corrosive environment occasion equipment power supply.
Contactless power transmission system is made of power transmission end system and receiving end system, and wherein sending end is generally by power frequency
The compositions such as rectifier, large capacity filter condenser, high-frequency inverter, power transmission coil and compensating unit and corresponding control unit；
Receiving end is generally by hf rectifier, filter condenser, power receiving coil and compensating unit and corresponding control unit etc. group
At as shown in Figure 1.It is filtered using large value capacitor after above-mentioned technical proposal sending end frequency rectifier so that power factor
It is relatively low.In order to improve sending end power factor, the prior art increase generally before sending end high-frequency inverter level-one power because
Number correction (Power Factor Correction, PFC) circuit, as shown in Figure 1a.But this can increase system complexity and at
This, reduces reliability and power transmission efficiency.
Invention content
The present invention is to solve the above-mentioned problems, it is proposed that a kind of contactless power transmission system and control method, this is
System be not necessarily to PFC correcting circuits, have many advantages, such as circuit simply and unity power factor.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of contactless power transmission system, including sending end, receiving end and control unit, wherein sending end with by
Electric end carries out electric energy transmission, and control unit controls sending end and receiving end；
The sending end includes the communication power supply being sequentially connected, low-pass filter, frequency rectifier, high-frequency inversion
Device, compensating unit I and power transmission coil, the frequency rectifier DC side are directly connected with high-frequency inverter DC side, the two it
Between reactive factor correcting circuit；
The receiving end includes the power receiving coil being sequentially connected, compensating unit II, hf rectifier and load；
Described control unit includes a current controller and switch signal generator, the feedback input end of current controller
Receive it is filtered after high-frequency inverter DC side current detection signal, the given input terminal of current controller receives the friendship
Flow signal of the voltage detection signal of power supply after absolute value converts and is multiplied by coefficient G, the output of the current controller
The input terminal of the switch signal generator is connected, the output connection high-frequency inverter and high frequency of the switch signal generator are whole
Flow device power switch control terminal.
The frequency rectifier and hf rectifier are passive rectifier, for the single-phase full bridge rectification of four diodes composition
Device circuit, for unidirectional contactless power transmission system, i.e., power is from the sending end to the load transmission of the receiving end.
The frequency rectifier and hf rectifier are active H bridge rectifiers, are four power with anti-paralleled diode
The H bridge translation circuits of switching tube composition, are used for two-way contactless power transmission system, i.e. power can be in the sending end and institute
State transmitted in both directions between receiving end.
The frequency rectifier is equipped with synchronous rectification control unit, and synchronous rectification control unit includes comparator and reverse phase
Device realizes that logical inversion is realized in the comparison to input ac voltage, phase inverter by comparing device；When input ac voltage is more than 0
When, the comparator exports logical one, and the phase inverter output is logical zero.
The high-frequency inverter is active H bridge inverters, is the H of four power switch tube compositions with anti-paralleled diode
Bridge translation circuit.
The high-frequency inverter is to have source semi-bridge inverter, is two power switch tube compositions with anti-paralleled diode
Semi-bridge alternation circuit.
A kind of control method based on above system, includes the following steps：
(1) the DC side electric current for detecting sending end high-frequency inverter, obtains current feedback signal after filtered processing and is sent to
The feedback input end of control unit current controller；
(2) sending end communication power supply voltage is detected, given instruction electricity is obtained after absolute value converts and is multiplied by coefficient G
Stream signal is sent to the given input terminal of control unit current controller；
(3) current controller carries out processing to given input signal and current feedback signal and outputs control signals to switch letter
Then the input terminal of number generator is controlled the power switch tube of high-frequency inverter and hf rectifier by switch signal generator,
Current feedback signal tracking is set to give input signal.
In the step (2), coefficient G can be obtained by the closed-loop control of the receiving end load voltage/current/power.
In the step (3), when power is transmitted from the sending end to receiving end, switch signal generator controls high frequency
The power switch tube of inverter.
In the step (3), when power is transmitted from the receiving end to sending end, switch signal generator controls high frequency
The power switch tube of rectifier.
Beneficial effects of the present invention are：
(1) a kind of contactless power transmission system and control method are provided, exchange, which can be realized, without pfc circuit supplies
The unity power factor of power supply reduces the complexity, volume and cost of system；
(2) pfc circuit is omitted, so that system is reduced level-one high frequency conversion link, reduces switching loss, improves and is
Conversion efficiency of uniting and reliability；
(3) it can be used for the various contactless power transmission systems powered by AC power, as electric vehicle is contactless
Charge/discharge etc..
Description of the drawings
Fig. 1 is the existing contactless power transmission system without pfc circuit；
Fig. 1 a are the existing contactless power transmission system with pfc circuit；
Fig. 2 is the contactless power transmission system of the present invention；
Fig. 3 is a kind of power frequency passive rectifier topological structure；
Fig. 3 a are a kind of power frequency H bridges active rectifier topological structure；
Fig. 4 is the synchronous rectification control unit of the power frequency H bridge active rectifiers of Fig. 3 a；
Fig. 5 is a kind of high frequency passive rectifier topology structure；
Fig. 5 a are a kind of high frequency H bridges active rectifier topological structure；
Fig. 6 is a kind of high frequency H bridge inverter topological structures；
Fig. 6 a are a kind of high frequency half bridge inverter topology；
Wherein, 1, low-pass filter, 2, frequency rectifier, 3, high-frequency inverter, 4, hf rectifier, 5, compensating unit I,
6, compensating unit II, 7, power transmission coil, 8, power receiving coil, 9, load, 10, communication power supply, 11, sending end, 12, by electricity
End, 13, control unit, 14, current controller, 15, switch signal generator, 16, filter circuit, 17, absolute value converter,
18, multiplier, 19, comparator, 20, phase inverter, 21, synchronous rectification control unit.
Specific implementation mode：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in Fig. 2, the contactless power transmission system figure of the present invention, it includes sending end 11, receiving end 12 and control
Unit 13 processed, wherein sending end 11 include communication power supply 10, low-pass filter 1, frequency rectifier 2, high-frequency inverter 3,
Power transmission coil 7 and compensating unit I 5；Receiving end includes hf rectifier 4, power receiving coil 8 and compensating unit II 6, load 9 etc..
It is characterized in that 2 DC side of the frequency rectifier is directly connected with high-frequency inverter DC side, reactive factor school between the two
Positive circuit.Described control unit 13 includes at least a current controller 14 and switch signal generator 15, the high-frequency inversion
The DC side current detection signal i of device 3dFiltered circuit 16 obtains after filteringThe feedback for connecting the current controller 14 is defeated
Enter end, 10 voltage detection signal u of the communication power supplysAfter the transformation of absolute value converter 17 | us|, after being multiplied by coefficient G
Obtain given instruction current signalConnect the given input terminal of the current controller 14, the current controller 14 it is defeated
Go out the input terminal that F connects the switch signal generator 15, the output K connections high-frequency inverter of switch signal generator 15
The power switch control terminal of 3/ hf rectifier 4.
Fig. 3 gives a kind of power frequency passive rectifier circuit structure diagram of frequency rectifier 2, including four diode Z1~
Z4 forms well known single-phase full bridge rectifier circuit.
Fig. 3 a give a kind of active H bridge rectifiers circuit structure diagram of power frequency of frequency rectifier 2, including four bands are anti-simultaneously
Power switch tube Q1~Q4 of union II pole pipe forms well known H bridge translation circuits.
The synchronous rectification control unit 21 of the active H bridge rectifiers of power frequency that Fig. 4 gives 2 is realized pair by comparing device 19
The comparison of input ac voltage, phase inverter 20 realize logical inversion.As input ac voltage usWhen more than 0, the comparator 19
Export logical one, the output of the phase inverter 20 is logical zero, the switching tube Q1 of active H bridge rectifiers shown in control figure 3a and
Q4 is connected, Q2 and Q3 cut-offs, conversely, working as input ac voltage usWhen less than 0, the comparator 19 exports logical zero, described anti-
The output of phase device 20 is logical one, switching tube Q2 and the Q3 conducting of active H bridge rectifiers shown in control figure 3a, Q1 and Q4 cut-offs.
Fig. 5 gives a kind of high frequency passive rectifier circuit structure chart of hf rectifier 4, including four diode Z5~
Z8 forms well known single-phase full bridge rectifier circuit.
Fig. 5 a give a kind of high frequency active H bridge rectifier circuit structure diagrams of hf rectifier 4, including four bands are anti-simultaneously
Power switch tube Q5~Q8 of union II pole pipe forms well known H bridge translation circuits.
Fig. 6 gives a kind of H bridge inverter circuit structure charts of high-frequency inverter 3, including four band anti-paralleled diodes
1~S4 of power switch tube S, form well known H bridge translation circuits.
Fig. 6 a give a kind of half-bridge inverter circuit structure diagram of high-frequency inverter 3, including two two poles of band inverse parallel
1~S2 of power switch tube S of pipe forms well known semi-bridge alternation circuit.
Embodiment 1：
Frequency rectifier 2 in Fig. 2 is realized that the H bridge inverters of high-frequency inverter 3 as shown in Figure 6 are realized, high frequency by Fig. 3
Rectifier 4 is realized by Fig. 5, just constitutes a kind of unidirectional contactless power transmission system main circuit topology, and power can only carry out just
To transmission, i.e., power from the transmission of load 9 from the communication power supply 10 of sending end 11 to receiving end 12 (or in Fig. 2 power by
Transmit to the right in left side), the power switch tube for exporting high-frequency inverter 3 described in K connection figures 6 of the switch signal generator 15
The control terminal of S1~S4.
Embodiment 2：
High-frequency inverter 3 in embodiment 1 is changed the half-bridge inverter shown in Fig. 6 a to realize, is just constituted another unidirectional
Contactless power transmission system main circuit topology, high frequency described in the output K connection figures 6a of the switch signal generator 15 are inverse
Become the control terminal of 1~S2 of power switch tube S of device 3.
Embodiment 3：
Frequency rectifier 2 in Fig. 2 is realized that the H bridge inverters of high-frequency inverter 3 as shown in Figure 6 are realized, high frequency by Fig. 3 a
Rectifier 4 is realized by Fig. 5 a, just constitutes a kind of two-way contactless power transmission system main circuit topology, and power can carry out forward direction
And reverse transfer.When carrying out forward power transmission, power bearing from the communication power supply 10 of sending end 11 to receiving end 12
9 transmission (or power is transmitted to the right by left side in Fig. 2) are carried, at this point, the output K connection figures of the switch signal generator 15
The control terminal of 1~S4 of power switch tube S of 6 high-frequency inverters 3, frequency rectifier 2 and hf rectifier 4 are all operated in whole
Stream mode (i.e. power switch tube is in cut-off state), high-frequency inverter 3 is in high-frequency inversion state.When progress backward power biography
When defeated, power from communication power supply 10 from the load 9 of receiving end 12 to sending end 11 transmission (or in Fig. 2 power by right side
Transmit to the left), at this point, the power switch of hf rectifier 4 described in the output K connection figures 5 of the switch signal generator 15
The control terminal of pipe Q5~Q8, hf rectifier 4 are operated in high-frequency inversion state, and frequency rectifier 2 is in synchronous rectification state,
Power switch tube Q1~Q4 is controlled by the synchronous rectification control unit 21 of Fig. 4, and high-frequency inverter 3 is in high-frequency rectification state (i.e.
1~S4 of power switch tube S is in cut-off state).
In above-described embodiment, the effect of the current controller 14 is finally the output for controlling the communication power supply 10
Electric current isFor with supply voltage usWith frequency, with/reverse phase, similar shape alternating current or be and supply voltage usWith frequency, with/reverse phase
Sinusoidal current, so that the contactless power transmission system is kept unity power factor.
In above-described embodiment, the coefficient G of control unit 13 can be adjusted by potentiometer, also can be negative by the receiving end 11
The closed-loop control for carrying 9 voltage/current/power obtains.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (9)
1. a kind of contactless power transmission system, including sending end, receiving end and control unit, wherein sending end with by electricity
End carries out electric energy transmission, and control unit controls sending end and receiving end；
The sending end includes the communication power supply being sequentially connected, low-pass filter, frequency rectifier, high-frequency inverter, benefit
Unit I and power transmission coil are repaid, the frequency rectifier DC side is directly connected with high-frequency inverter DC side, idle therebetween
Rate factor correcting circuit；
The receiving end includes the power receiving coil being sequentially connected, compensating unit II, hf rectifier and load；
It is characterized in that：Described control unit includes a current controller and switch signal generator, the feedback of current controller
Input terminal receive it is filtered after high-frequency inverter DC side current detection signal, the given input terminal of current controller receives
Signal of the voltage detection signal of the communication power supply after absolute value converts and is multiplied by coefficient G, the current controller
Output connect the input terminal of the switch signal generator, the output connection high-frequency inverter of the switch signal generator and
Hf rectifier power switch control terminal；
The output current that the current controller is used to control the communication power supply be with supply voltage with frequency, with/reverse phase,
The alternating current of similar shape is the sinusoidal current with the same frequency of supply voltage, same/reverse phase, makes the contactless power transmission system
Blanket insurance holds unity power factor.
2. a kind of contactless power transmission system as described in claim 1, it is characterized in that：The frequency rectifier and high frequency
Rectifier is passive rectifier, for the single-phase full bridge rectifier circuit of four diodes composition, is used for unidirectional contactless power
Transmission system, i.e. power are from the sending end to the load transmission of the receiving end.
3. a kind of contactless power transmission system as described in claim 1, it is characterized in that：The frequency rectifier and high frequency
Rectifier is active H bridge rectifiers, is the H bridge translation circuits of four power switch tube compositions with anti-paralleled diode, is used for
Two-way contactless power transmission system, i.e. power can between the sending end and the receiving end transmitted in both directions.
4. a kind of contactless power transmission system as described in claim 1, it is characterized in that：The frequency rectifier is equipped with same
Commutation control unit is walked, synchronous rectification control unit includes comparator and phase inverter, is realized to input AC electricity by comparing device
The comparison of pressure, phase inverter realize logical inversion；When input ac voltage is more than 0, the comparator exports logical one, described
Phase inverter output is logical zero.
5. a kind of contactless power transmission system as described in claim 1, it is characterized in that：The high-frequency inverter is active
H bridge inverters are the H bridge translation circuits of four power switch tube compositions with anti-paralleled diode.
6. a kind of contactless power transmission system as described in claim 1, it is characterized in that：The high-frequency inverter is active
Half-bridge inverter is the semi-bridge alternation circuit of two power switch tube compositions with anti-paralleled diode.
7. a kind of control method based on the contactless power transmission system as described in any one of claim 1-6, special
Sign is：Include the following steps：
(1) the DC side electric current for detecting sending end high-frequency inverter, obtains current feedback signal and is sent to control after filtered processing
The feedback input end of cell current controller；
(2) sending end communication power supply voltage is detected, given instruction current letter is obtained after absolute value converts and is multiplied by coefficient G
Number it is sent to the given input terminal of control unit current controller；
(3) current controller carries out processing to given input signal and current feedback signal and outputs control signals to switching signal hair
The input terminal of raw device, the power switch tube of high-frequency inverter and hf rectifier is then controlled by switch signal generator, makes electricity
It flows feedback signal tracking and gives input signal.
8. control method as claimed in claim 7, it is characterized in that：In the step (2), coefficient G can be born by the receiving end
The closed-loop control for carrying voltage/current/power obtains.
9. control method as claimed in claim 7, it is characterized in that：In the step (3), when power from the sending end to by
When electric end transmission, switch signal generator controls the power switch tube of high-frequency inverter；
In the step (3), when power is transmitted from the receiving end to sending end, switch signal generator controls high-frequency rectification
The power switch tube of device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520021827.0U CN204316199U (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system |
| CN201510015953.XA CN105846549B (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510015953.XA CN105846549B (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105846549A CN105846549A (en) | 2016-08-10 |
| CN105846549B true CN105846549B (en) | 2018-09-21 |
Family
ID=57177986
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520021827.0U Expired - Fee Related CN204316199U (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system |
| CN201510015953.XA Active CN105846549B (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system and control method |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520021827.0U Expired - Fee Related CN204316199U (en) | 2015-01-13 | 2015-01-13 | A kind of contactless power transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN204316199U (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204316199U (en) * | 2015-01-13 | 2015-05-06 | 山东大学 | A kind of contactless power transmission system |
| US10046660B2 (en) | 2015-06-19 | 2018-08-14 | Qualcomm Incorporated | Devices, systems, and methods using reactive power injection for active tuning electric vehicle charging systems |
| CN106059364B (en) * | 2016-08-11 | 2018-11-23 | 重庆大学 | A kind of sources of high frequency emissions for radio energy transmission system |
| CN106899091B (en) * | 2017-04-20 | 2020-03-10 | 武汉大学 | Remote control device and method of wireless energy transmission system |
| CN109995240A (en) | 2018-01-02 | 2019-07-09 | 通用电气公司 | Power adapter and power conversion method |
| CN111416443A (en) * | 2019-01-07 | 2020-07-14 | 哈尔滨工业大学（威海） | Device capable of realizing wireless power transmission voltage stabilization output |
| CN110061570B (en) | 2019-05-28 | 2020-10-02 | 浙江大学 | Wireless power transmission system for realizing PFC (Power factor correction) through secondary modulation |
| CN111740505B (en) * | 2020-07-03 | 2022-02-08 | 浙江大学 | Method for realizing PFC (Power factor correction) only through primary side phase shift control |
| CN114172166A (en) * | 2021-12-07 | 2022-03-11 | 阳光电源股份有限公司 | Voltage generating device and high-frequency generation control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986344A (en) * | 2014-05-30 | 2014-08-13 | 山东大学 | System and method for controlling unit power factor single-level AC-DC converter |
| CN104079076A (en) * | 2013-03-29 | 2014-10-01 | 河南工程学院 | Non-contact power supply system using frequency conversion soft switching driving technology and driving method thereof |
| CN203967994U (en) * | 2014-05-30 | 2014-11-26 | 山东大学 | Unity power factor single-stage AC-DC converter |
| CN104218640A (en) * | 2014-08-29 | 2014-12-17 | 中国科学院电工研究所 | Wireless charging system with multi-load frequency adaptability |
| CN204316199U (en) * | 2015-01-13 | 2015-05-06 | 山东大学 | A kind of contactless power transmission system |
-
2015
- 2015-01-13 CN CN201520021827.0U patent/CN204316199U/en not_active Expired - Fee Related
- 2015-01-13 CN CN201510015953.XA patent/CN105846549B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079076A (en) * | 2013-03-29 | 2014-10-01 | 河南工程学院 | Non-contact power supply system using frequency conversion soft switching driving technology and driving method thereof |
| CN103986344A (en) * | 2014-05-30 | 2014-08-13 | 山东大学 | System and method for controlling unit power factor single-level AC-DC converter |
| CN203967994U (en) * | 2014-05-30 | 2014-11-26 | 山东大学 | Unity power factor single-stage AC-DC converter |
| CN104218640A (en) * | 2014-08-29 | 2014-12-17 | 中国科学院电工研究所 | Wireless charging system with multi-load frequency adaptability |
| CN204316199U (en) * | 2015-01-13 | 2015-05-06 | 山东大学 | A kind of contactless power transmission system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN204316199U (en) | 2015-05-06 |
| CN105846549A (en) | 2016-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105846549B (en) | A kind of contactless power transmission system and control method | |
| CN103490419B (en) | Flexible alternating-current direct-current hybrid power supply system of power distribution network | |
| CN103208855B (en) | A kind of uninterrupted power source and DC-DC converter | |
| CN103986344B (en) | The control system of unity power factor single-stage AC DC isolated converter and control method | |
| CN108667036A (en) | A kind of electric vehicle V2G inverter control methods | |
| CN102790422B (en) | A kind of UPS charging module device and control method thereof | |
| CN107517595A (en) | Two-way contactless power supply device and two-way contactless power supply system | |
| CN107618388A (en) | A kind of wireless charging system for electric automobile | |
| CN205724952U (en) | Onboard charger and vehicle | |
| CN102075107B (en) | Main circuit of three-phase four-wire DC/AC convertor and control method thereof | |
| CN103762873B (en) | Based on the high frequency isolation type three-level inverter of Boost | |
| CN102291014A (en) | Alternating-current chopping-full-bridge rectification AC-DC (alternating current-to-direct current) converter | |
| US10003253B2 (en) | Hybrid transformation system based on three-phase PWM rectifier and multi-unit uncontrolled rectifier and control method thereof | |
| CN103888013B (en) | The Miniature inverter theoretical based on high-frequency ac blood pressure lowering and numerical control device thereof | |
| CN105846685B (en) | A kind of cascaded Boost formula Unidirectional direct-current transformer | |
| CN104638688A (en) | Single-phase uninterrupted power supply circuit and three-phase uninterrupted power supply circuit | |
| CN205490225U (en) | Two -way ACDC circuit of high -frequency chopper isolated form | |
| CN104539181A (en) | Miniature photovoltaic grid-connected inverter based on LLC resonant conversion | |
| CN203967994U (en) | Unity power factor single-stage AC-DC converter | |
| CN106160451B (en) | The control method of three close-loop control power factor corrector | |
| CN106452096B (en) | A kind of bridge structure, converter circuit and electric power electric transformer | |
| CN106329699B (en) | A kind of uninterruptible power supply and its control method, control device | |
| CN106685208A (en) | Bridgeless Power Factor Correction (PFC) circuit, vehicle-mounted charger and electric vehicle | |
| CN105914733A (en) | Offshore platform power supply system based on full-bridge MMC DC side series connection and control method thereof | |
| CN105429445A (en) | Bidirectional converter for alternating current/direct current microgrid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |