CN115776218A - High-power high-voltage direct-current ripple power supply - Google Patents
High-power high-voltage direct-current ripple power supply Download PDFInfo
- Publication number
- CN115776218A CN115776218A CN202310100743.5A CN202310100743A CN115776218A CN 115776218 A CN115776218 A CN 115776218A CN 202310100743 A CN202310100743 A CN 202310100743A CN 115776218 A CN115776218 A CN 115776218A
- Authority
- CN
- China
- Prior art keywords
- ripple
- power supply
- voltage
- power
- coupling transformer
- 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.)
- Granted
Links
Images
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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Rectifiers (AREA)
Abstract
The invention provides a high-power high-voltage direct-current ripple power supply which comprises a high-voltage high-power direct-current power supply, a ripple generator and a coupling transformer bank, wherein the output end Udc + of the high-voltage high-power direct-current power supply is connected with one end of the secondary side of the coupling transformer bank, the other end of the output end Uo + of the direct-current ripple power supply is connected with the output end Udc +, the output end Udc-of the high-voltage high-power direct-current power supply is connected with the output end Uo-, and the output ends L and N of the ripple generator are respectively connected with two ends of the primary side of the coupling transformer bank. According to the invention, the three or more coupling transformers working at different frequencies superpose the high-frequency ripple voltages of different frequency bands on the direct-current voltage, so that the system integrally outputs the high-voltage direct-current voltage with the high-frequency sine ripples, and the system can be applied to the test of electric parts of new energy automobiles.
Description
Technical Field
The invention relates to the technical field of ripple power supplies, in particular to a high-power high-voltage direct-current ripple power supply.
Background
According to the requirements of domestic and foreign industry standards LV123, VW80303 and the like, high-voltage direct-current ripple power supply tests are carried out on the electric parts of the new energy automobile so as to simulate the situation that high-voltage direct-current electric systems in the automobile generate ripples in the processes of starting and stopping a motor, starting and stopping an auxiliary motor and the like under actual automobile conditions.
The existing ripple power supply technology can realize the function of superposing ripples on direct current voltage, but all the power supply technologies are based on power supply chips, the power is usually from several watts to dozens of watts, and the voltage is in the levels of 3V, 5V and 12V, so that the ripple power supply technology is applied to circuit board performance test or small electronic equipment test. And the working principle of realizing the ripple power supply can not be applied to the realization of the ripple power supply of the electric appliance parts of the new energy automobile. The technical scheme that the direct-current voltage reaches 1000V or higher, the power reaches dozens of kilowatts or hundreds of kilowatts, the ripple voltage reaches dozens of volts, and the ripple frequency reaches 150kHz is urgently needed to be provided in response to the test of the high-voltage electric appliance parts of the new energy automobile.
Disclosure of Invention
The invention aims to provide a high-power high-voltage direct-current ripple power supply which can realize high-power high-voltage direct-current voltage superposition high-frequency ripple output.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a high-power high-voltage direct-current ripple power supply comprises a high-voltage high-power direct-current power supply, a ripple generator and a coupling transformer bank, wherein an output end Udc + of the high-voltage high-power direct-current power supply is connected with one end of a secondary side of the coupling transformer bank, the other end of the output end Uo + of the direct-current ripple power supply is connected with the output end Udc +, an output end L and an output end N of the ripple generator are respectively connected with two ends of a primary side of the coupling transformer bank.
Preferably, the coupling transformer bank comprises a plurality of coupling transformers working at different frequency bands, the plurality of coupling transformers are sequentially connected in series after Udc + according to the sequence that the high frequency is in front and the low frequency is in back, namely the secondary side of the coupling transformer at the highest frequency band is connected with Udc +, the secondary side of the coupling transformer at the lowest frequency band is connected with Uo +, one end of the primary side of each coupling transformer is connected in parallel and then connected with the output end N of the ripple generator, and the other end of each coupling transformer is connected with the controllable bidirectional switch and then connected with the output end L of the ripple generator.
The controllable bidirectional switch is a common emitter IGBT module FF300R12KE4_ E.
Preferably, the coupling transformer bank comprises three coupling transformers: the high-frequency band coupling transformer TR3, the middle-frequency band coupling transformer TR2, the low-frequency band coupling transformer TR1 are respectively controlled by controllable two-way switches K3, K2, K1, the high-voltage high-power direct-current power supply output end Udc + is connected with a secondary side terminal t3x of the high-frequency band coupling transformer TR3, a secondary side terminal t3y of the TR3 is connected with a secondary side terminal t2x of the TR2, a secondary side terminal t2y of the TR2 is connected with a secondary side terminal t1x of the TR1, and the secondary side terminal t1y of the TR1 is connected with a direct-current ripple power supply output end Uo +.
The design working frequency of the high-frequency band coupling transformer TR3 is 2kHz, the design working frequency of the medium-frequency band coupling transformer TR2 is 200Hz, the design working frequency of the low-frequency band coupling transformer TR1 is 10Hz, the ripple wave generator outputs high-frequency ripple voltage with the maximum amplitude of 10Hz-150kHz and 40Vpp, the switch driving signals of the controllable bidirectional switches K1, K2 and K3 are S1-S6, when the ripple wave frequency is 10Hz-2kHz, the S1 and the S2 output high levels, the switch K1 is controlled to be closed, the output of other driving signals is low, and the K2 and the K3 are disconnected; ripple frequency is 2kHz-20kHz, S3 and S4 output high level, a control switch K2 is closed, other driving signals are output low, and K1 and K3 are disconnected; ripple frequency is 20kHz-150kHz, S5 and S6 output high level, the bidirectional switch K3 is controlled to be closed, other driving signals are output low, and K1 and K2 are disconnected.
The high-voltage high-power direct-current power supply has the model number of ANEVT1500-500C, the maximum output voltage 1500Vdc, the rated current 500A and the rated power 300kW.
The ripple generator can be a wide-frequency ripple generator which comprises a plurality of H-bridge cascade units connected in series in sequence, an output filter inductor Lo, a filter capacitor C and a DSP processor.
The H-bridge cascade unit is modulated by adopting a carrier phase shift modulation technology.
The invention has the advantages that: high-frequency ripple voltage of different frequency bands is superposed on direct current voltage through three or more coupling transformers working at different frequencies, so that the system integrally outputs high-voltage direct current voltage with high-frequency sine ripples, and a high-power high-voltage direct current ripple power supply is provided and can be applied to the test of electrical parts of new energy automobiles. And the ripple generator controller switches the closed state of three or more controllable bidirectional switches by detecting the output ripple frequency set by the ripple generator controller, thereby ensuring the realization of continuous output of the ripple full-frequency section and realizing on-line dynamic frequency sweeping.
Drawings
FIG. 1 is a schematic circuit diagram according to embodiment 1 of the present invention;
FIG. 2 is the output voltage waveform of the high voltage high power DC power supply of embodiment 1 of the present invention;
FIG. 3 is a waveform of an output voltage of a ripple generator according to embodiment 1 of the present invention;
fig. 4 is a voltage waveform of the overall output voltage of the high-power high-voltage direct-current ripple power supply system according to embodiment 1 of the invention;
FIG. 5 is a schematic view of an H-bridge cascade according to embodiment 2 of the present invention;
fig. 6 is a waveform diagram of H-bridge cascaded carrier phase shift control in embodiment 2 of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
The embodiment discloses a high-power high-voltage dc ripple power supply, please refer to fig. 1, which includes: the high-voltage high-power direct-current power supply comprises a high-frequency band coupling transformer TR3, a medium-frequency band coupling transformer TR2, a low-frequency band coupling transformer TR1, controllable two-way switches K1, K2 and K3 and a ripple wave generator. The high-voltage high-power direct-current power supply output end Udc + is connected with a high-frequency section coupling transformer TR3 secondary side terminal t3x, the TR3 secondary side terminal t3y is connected with a TR2 secondary side terminal t2x, the TR2 secondary side terminal t2y is connected with a TR1 secondary side terminal t1x, the TR1 secondary side terminal t1y is connected with a direct-current ripple power supply output end Uo +, and the high-voltage high-power direct-current power supply output end Udc-is connected with the direct-current ripple power supply output end Uo-.
The primary non-homonymous terminal T3Y, T2Y, T Y of the high-frequency band coupling transformer TR3, the middle-frequency band coupling transformer TR2 and the low-frequency band coupling transformer TR1 are connected in parallel and then connected with the output end N of the ripple generator.
The terminals 3 of the controllable bidirectional switches K1, K2 and K3 are connected in parallel and then connected with the output end L of the ripple generator, the other ends of the controllable bidirectional switches K1, K2 and K3 are respectively connected with one end of the primary side of the switch controlled by the terminals, namely, the terminal 1 of the controllable bidirectional switch K3 is connected with the primary side T3X terminal of the high-frequency band coupling transformer TR3, the terminal 1 of the controllable bidirectional switch K2 is connected with the primary side T2X terminal of the middle-frequency band coupling transformer TR2, and the terminal 1 of the controllable bidirectional switch K1 is connected with the primary side T1X terminal of the low-frequency band coupling transformer TR 1.
The high-frequency band coupling transformer TR3, the medium-frequency band coupling transformer TR2 and the low-frequency band coupling transformer TR1 are sequentially connected in series on the secondary side behind the Udc +, the frequency is high in the front, and the frequency is low in the back. It is worth noting that three or more coupling transformers need to be connected in series in sequence at the front low frequency and the rear secondary side, and the direct current output by the high-power high-voltage direct-current power supply only flows through the secondary side of the coupling transformer to the system output end.
The working frequency of the high-frequency coupling transformer TR3 is designed to be 2kHz, the working frequency of the medium-frequency coupling transformer TR2 is designed to be 200Hz, and the working frequency of the low-frequency coupling transformer TR1 is designed to be 10Hz.
The ripple generator outputs high-frequency ripple voltage with the maximum amplitude of 40Vpp between 10Hz and 150kHz, and the frequency amplitude is continuously adjustable. The ripple generator controller adjusts the switch driving signals S1-S6 of the controllable bidirectional switches K1, K2 and K3 by detecting the output ripple frequency set by the ripple generator controller. The method comprises the following specific steps: ripple frequency is 10Hz-2kHz, S1 and S2 output high level, the bidirectional switch K1 is controlled to be closed, other driving signals are output low, and K2 and K3 are switched off. Ripple frequency is 2kHz-20kHz, S3 and S4 output high level, the bidirectional switch K2 is controlled to be closed, other driving signals are output low, and K1 and K3 are disconnected. Ripple frequency is 20kHz-150kHz, S5 and S6 output high level, the bidirectional switch K3 is controlled to be closed, other driving signals are output low, and K1 and K2 are disconnected.
The model of the high-voltage high-power direct-current power supply is ANEVT1500-500C, the maximum output voltage is 1500Vdc, the rated current is 500A, the rated power is 300kW, and the controllable bidirectional switches K1, K2 and K3 are common emitter IGBT modules FF300R12KE4_ E.
The high-voltage high-power dc power supply outputs a high-voltage dc voltage of 24-1500Vdc, referring to fig. 2, the ripple generator outputs a high-frequency sinusoidal ripple voltage of 10Hz-150kHZ, referring to fig. 3. The high-frequency ripple voltage of different frequency bands is superposed on the direct current voltage through three or more coupling transformers working at different frequencies, so that the system integrally outputs high-voltage direct current voltage with high-frequency sinusoidal ripples, and the output voltage refers to fig. 4. The ripple generator controller switches the closed state of three or more controllable bidirectional switches to realize continuous output of ripple full-frequency bands by detecting the output ripple frequency set by the ripple generator controller, so that online dynamic frequency sweeping is realized. A high-voltage high-power direct-current power supply and a ripple generator belong to the prior art.
Example 2
Based on the high-power high-voltage direct-current ripple power supply of embodiment 1, the wide-frequency ripple generator includes N H-bridge cascade units connected in series in sequence, an output filter inductor Lo, a filter capacitor C, and a DSP processor, where the H-bridge cascade unit is modulated by a carrier phase-shifting SPWM modulation technique.
In the present embodiment, an example of N =2 is described, and referring to fig. 5, the output voltage of the first H-bridge is denoted as Uab1, the output of the second H-bridge is denoted as Uab2, the sine wave frequency is 150kHz, and the triangular wave frequency is 100kHz.
Referring to fig. 6, all the triangular carriers have the same frequency and amplitude, adjacent triangular carriers have a pi/2 phase shift, pulse signals are respectively generated through comparison between modulation waves and carriers to control output voltages Uab1 and Uab2 of the first H bridge and the second H bridge, and output voltages of the last two H bridge inversion units are superposed to obtain an output voltage ULN, where the frequency of the ULN is 400kHz, and a modulation frequency multiple m =400/150=2.67.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The high-power high-voltage direct-current ripple power supply is characterized by comprising a high-voltage high-power direct-current power supply, a ripple generator and a coupling transformer bank, wherein an output end Udc + of the high-voltage high-power direct-current power supply is connected with one end of a secondary side of the coupling transformer bank, the other end of the output end Udc + of the high-voltage high-power direct-current power supply is connected with an output end Uo + of the direct-current ripple power supply, an output end L and an output end N of the ripple generator are respectively connected with two ends of a primary side of the coupling transformer bank.
2. The high-power high-voltage direct-current ripple power supply according to claim 1, wherein the coupling transformer bank comprises a plurality of coupling transformers working in different frequency bands, the plurality of coupling transformers are sequentially connected in series after Udc + according to the sequence of high-frequency front secondary sides and low-frequency back secondary sides, the coupling transformer secondary side in the highest frequency band is connected with Udc +, the coupling transformer secondary side in the lowest frequency band is connected with Uo +, one end of the primary side of each coupling transformer is connected in parallel to the ripple generator output end N, and the other end of each coupling transformer is connected with the controllable bidirectional switch and then connected to the ripple generator output end L.
3. The high power high voltage direct current ripple power supply according to claim 2, wherein the controllable bidirectional switch is a common emitter IGBT module FF300R12KE4_ E.
4. The high power high voltage direct current ripple power supply of claim 2, wherein the coupling transformer bank comprises three coupling transformers: the high-frequency band coupling transformer TR3, the middle-frequency band coupling transformer TR2, the low-frequency band coupling transformer TR1 are respectively controlled by controllable two-way switches K3, K2, K1, the high-voltage high-power direct-current power supply output end Udc + is connected with a secondary side terminal t3x of the high-frequency band coupling transformer TR3, a secondary side terminal t3y of the TR3 is connected with a secondary side terminal t2x of the TR2, a secondary side terminal t2y of the TR2 is connected with a secondary side terminal t1x of the TR1, and the secondary side terminal t1y of the TR1 is connected with a direct-current ripple power supply output end Uo +.
5. The high-power high-voltage direct-current ripple power supply according to claim 4, wherein the high-frequency band coupling transformer TR3 is designed to have an operating frequency of 2kHz, the medium-frequency band coupling transformer TR2 is designed to have an operating frequency of 200Hz, the low-frequency band coupling transformer TR1 is designed to have an operating frequency of 10Hz, the ripple generator outputs a high-frequency ripple voltage with a maximum amplitude of 40Vpp of 10Hz-150kHz, the switch driving signals of the controllable bidirectional switches K1, K2 and K3 are S1-S6, when the ripple frequency is 10Hz-2kHz, the S1 and S2 output high levels, the switch K1 is controlled to be closed, the other driving signals output low, and the K2 and K3 are disconnected; ripple frequency is 2kHz-20kHz, S3 and S4 output high level, a control switch K2 is closed, other driving signals are output low, and K1 and K3 are disconnected; ripple frequency is 20kHz-150kHz, S5 and S6 output high level, the bidirectional switch K3 is controlled to be closed, other driving signals are output low, and K1 and K2 are disconnected.
6. The high-power high-voltage direct-current ripple power supply according to claim 1, wherein the high-power direct-current power supply is of a type ANEVT1500-500C, a maximum output voltage of 1500Vdc, a rated current of 500A and a rated power of 300kW.
7. The high-power high-voltage direct-current ripple power supply according to any one of claims 1 to 6, wherein the ripple generator is a wide-frequency ripple generator comprising a plurality of H-bridge cascade units, an output filter inductor Lo, a filter capacitor C and a DSP processor which are connected in series in sequence.
8. The high-power high-voltage direct current ripple power supply according to claim 7, wherein the H-bridge cascaded unit is modulated by a carrier phase shift modulation technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310100743.5A CN115776218B (en) | 2023-02-13 | 2023-02-13 | High-power high-voltage direct-current ripple power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310100743.5A CN115776218B (en) | 2023-02-13 | 2023-02-13 | High-power high-voltage direct-current ripple power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115776218A true CN115776218A (en) | 2023-03-10 |
| CN115776218B CN115776218B (en) | 2023-04-18 |
Family
ID=85393662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310100743.5A Active CN115776218B (en) | 2023-02-13 | 2023-02-13 | High-power high-voltage direct-current ripple power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115776218B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116148698A (en) * | 2023-04-18 | 2023-05-23 | 山东艾诺智能仪器有限公司 | Online alternating current impedance tester for fuel cell |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753037A (en) * | 2009-09-11 | 2010-06-23 | 上海东沪医用设备有限公司 | High voltage generation device of medical high-frequency high voltage generator |
| US20120112721A1 (en) * | 2010-11-08 | 2012-05-10 | Intersil Americas Inc. | Synthetic ripple regulator with frequency control |
| CN105675932A (en) * | 2016-01-21 | 2016-06-15 | 中国电力科学研究院 | Testing power supply for aging of lightning arrester of high-voltage DC power transmission system |
| CN109787483A (en) * | 2019-01-29 | 2019-05-21 | 北方工业大学 | Control method of power supply for capacitor ripple test and power supply for capacitor ripple test |
| CN110275124A (en) * | 2018-03-16 | 2019-09-24 | 西安交通大学 | DC stacked line wave generation circuit for the test of MMC submodule capacitor |
| CN112098916A (en) * | 2020-07-24 | 2020-12-18 | 国网浙江省电力有限公司营销服务中心 | System and method for superposing ripples on direct current loop in direct current electric energy detection device |
| CN212413053U (en) * | 2020-06-02 | 2021-01-26 | 南京桐润新能源有限公司 | Self-switching transformer adaptive wide input voltage circuit |
| CN216672976U (en) * | 2021-12-03 | 2022-06-03 | 合肥科威尔电源系统股份有限公司 | Wide frequency range ripple generator |
-
2023
- 2023-02-13 CN CN202310100743.5A patent/CN115776218B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753037A (en) * | 2009-09-11 | 2010-06-23 | 上海东沪医用设备有限公司 | High voltage generation device of medical high-frequency high voltage generator |
| US20120112721A1 (en) * | 2010-11-08 | 2012-05-10 | Intersil Americas Inc. | Synthetic ripple regulator with frequency control |
| CN105675932A (en) * | 2016-01-21 | 2016-06-15 | 中国电力科学研究院 | Testing power supply for aging of lightning arrester of high-voltage DC power transmission system |
| CN110275124A (en) * | 2018-03-16 | 2019-09-24 | 西安交通大学 | DC stacked line wave generation circuit for the test of MMC submodule capacitor |
| CN109787483A (en) * | 2019-01-29 | 2019-05-21 | 北方工业大学 | Control method of power supply for capacitor ripple test and power supply for capacitor ripple test |
| CN212413053U (en) * | 2020-06-02 | 2021-01-26 | 南京桐润新能源有限公司 | Self-switching transformer adaptive wide input voltage circuit |
| CN112098916A (en) * | 2020-07-24 | 2020-12-18 | 国网浙江省电力有限公司营销服务中心 | System and method for superposing ripples on direct current loop in direct current electric energy detection device |
| CN216672976U (en) * | 2021-12-03 | 2022-06-03 | 合肥科威尔电源系统股份有限公司 | Wide frequency range ripple generator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116148698A (en) * | 2023-04-18 | 2023-05-23 | 山东艾诺智能仪器有限公司 | Online alternating current impedance tester for fuel cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115776218B (en) | 2023-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Nedumgatt et al. | A multilevel inverter with reduced number of switches | |
| EP3244523B1 (en) | Alternating-current direct-current photovoltaic device | |
| CN115776218B (en) | High-power high-voltage direct-current ripple power supply | |
| Cao et al. | A variable switching frequency algorithm to improve the total efficiency of single-phase grid-connected inverters | |
| Abarzadeh et al. | A modified static ground power unit based on active natural point clamped converter | |
| Xing et al. | Motor drive system EMI reduction by asymmetric interleaving | |
| Abbas et al. | Design and analysis of 15-level asymmetric multilevel inverter with reduced switch count using different PWM techniques | |
| Kumar et al. | Minimization of inter-module leakage current in cascaded H-bridge multilevel inverters for grid connected solar PV applications | |
| Raj et al. | A modified charge balancing scheme for cascaded H-bridge multilevel inverter | |
| Najjar et al. | Mitigation zero-crossing distortion of active neutral-point-clamped rectifier with improved hybrid PWM technique | |
| Khan et al. | Single-phase switched-capacitor integrated-boost five-level inverter | |
| Majhee et al. | Analysis and development of a novel step-up 17 level switched capacitor multilevel inverter for renewable energy conversion system | |
| Kulkarni et al. | Modified Transister Clamped H-bridge-based Cascaded Multilevel inverter with high reliability | |
| Kashif et al. | A multilevel inverter topology with reduced number of switches | |
| Edwin Deepak et al. | Three phase z-source neutral point clamped inverter with multicarrier PWM technique | |
| KR101224589B1 (en) | Multilevel inverter | |
| Mahato et al. | Design, development and verification of a new multilevel inverter for reduced power switches | |
| Rahul et al. | Single-phase Quasi-Z-source based isolated DC/AC converter | |
| Tian et al. | A new space vector modulation technique for common-mode voltage reduction in both magnitude and third-order component | |
| KR100603993B1 (en) | A electric power regeneration apparatus that equipped a active power filter in electric train | |
| Cheng et al. | A Multilevel Asymmetric Current Source Inverter Topology Using Switched Inductor | |
| Korhonen et al. | Feedforward control of isolating photovoltaic DC-DC converter to reduce grid-side DC link voltage fluctuation | |
| Shalini et al. | Cascaded multilevel inverter for industrial applications | |
| CN215120150U (en) | Parallel grid-connected inverter system | |
| CN107565676B (en) | Photovoltaic equipment and photovoltaic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A high-power high-voltage DC ripple power supply Effective date of registration: 20230825 Granted publication date: 20230418 Pledgee: Bank of Beijing Co.,Ltd. Jinan Branch Pledgor: Shandong Ainuo Intelligent Instrument Co.,Ltd. Registration number: Y2023980053581 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |