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1. 发明申请

US20230140308A1 Forward DC-DC ZVS converter and control scheme 有权
公开(公告)号：US20230140308A1
公开(公告)日：2023-05-04
申请号：US17300765
申请日：2021-10-29
申请人： Da Feng Weng
发明人： Da Feng Weng
IPC分类号： H02M3/335 , H02M1/08
摘要： The proposed solution allows a forward DC-DC converter's isolated transformer to resonant reset and the forward DC-DC converter to operate in ZVS condition regardless of whether the output inductor current is in DCM or CCM. To compare with a regular forward DC-DC converter, the output isolated transformer has an extra reset winding Nt in addition to the regular primary and secondary windings Np and Ns. Based on the rule of the magnetic flux remaining unchanged for the forward output isolated transformer, it is the extra reset winding Nt, a resonant capacitor Cr, an additional MOS Q2 and the related control function block M that allow the forward output isolated transformer to finish resonant reset and the primary main power MOS Q1 to operate in ZVS. The magnetizing current of the forward output isolated transformer is fully utilized, and regardless of whether the resonant reset circuit is on the primary or the secondary, the magnetizing current can enable the forward output isolated transformer to resonant reset and serve as the main power MOS Q1 operation in ZVS.

2. 发明申请

US20230136629A1 MULTIPLE-PORT BIDIRECTIONAL CONVERTER AND CONTROL METHOD THEREOF 有权
公开(公告)号：US20230136629A1
公开(公告)日：2023-05-04
申请号：US18149382
申请日：2023-01-03
申请人： Delta Electronics, Inc.
发明人： Misha Kumar , Yungtaek Jang , Peter Barbosa , Minli Jia , Hao Sun
IPC分类号： H02M3/335 , H02M3/00 , H02J7/00 , H02M7/5387 , H02J50/12
摘要： A bidirectional DC-DC converter with three or more ports is described along with a method of operation thereof. The converter utilizes a common transformer for all ports and allows for power transfer from any port to any or all of the remaining ports. The converter may utilize a controller which implements variable-frequency control, delay-time control, and/or phase-delay control to achieve power transfer as desired between the converter ports. In some cases, power transfer between ports can operate similar to a series-resonant converter or a dual active bridge converter.

3. 发明申请

US20230134153A1 UNINTERRUPTIBLE POWER SUPPLY SYSTEM 有权
公开(公告)号：US20230134153A1
公开(公告)日：2023-05-04
申请号：US17907726
申请日：2020-07-03
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Yuki YAMASHITA , Tomohiro TANAKA
IPC分类号： H02J9/06 , H02M1/42 , H02M3/335 , H02J3/32
摘要： A plurality of UPSs are connected in parallel between an AC power supply and a load. The UPSs each include a first switch connected between the AC power supply and an AC node. During the first power feeding mode, a control device turns on the first switch, and controls a power conversion device so as to receive AC power from the AC node and generate AC power. During a second power feeding mode, the control device turns off the first switch, and controls the power conversion device so as to receive DC power from a power storage device and generate AC power. When the AC power supply recovers during the second power feeding mode, the control device successively switches the plurality of UPSs to the first power feeding mode by successively turning on a plurality of the first switches each of which corresponds to each of the plurality of UPSs.

4. 发明申请

US20230132668A1 AN ISOLATED PRIMARY SIDE SWITCHED CONVERTER FOR LED LOADS 有权
公开(公告)号：US20230132668A1
公开(公告)日：2023-05-04
申请号：US17912948
申请日：2021-03-22
申请人： Tridonic GmbH & Co KG
发明人： Jakob Maldoner
IPC分类号： H05B45/382 , H02M3/335
摘要： The invention relates to an isolated primary side switched converter (100), comprising a galvanic isolation stage (105) separating a primary side (101) and a secondary side (103) of the converter (100), a secondary side winding (107) of the isolation stage (105), wherein the secondary side winding (107) is coupled to a primary side winding, and wherein the secondary side winding (107) comprises a center tap, a first terminal (T1), a second terminal (T2) and a third terminal (T3) for connecting an LED load (LED1, LED2) on the secondary side (103) of the converter (100), a rectification circuit (109) on the secondary side (103) of the converter (100), wherein the rectification circuit (109) is configured to set the first terminal (T1) at a first electrical polarity, and to set the second and the third terminal (T2, T3) at a second electrical polarity that is different to the first electrical polarity, wherein the third terminal (T3) is electrically connected to the center tap, and wherein a voltage between the first and the second terminal (T1, T2) is larger than a voltage between the first and the third terminal (T1, T3).

5. 发明授权

US11641165B2 Flyback converter and method of operating the same 有权
公开(公告)号：US11641165B2
公开(公告)日：2023-05-02
申请号：US17053757
申请日：2020-09-30
申请人： INNOSCIENCE (SUZHOU) TECHNOLOGY CO., LTD.
发明人： Tao Zhang , Jihua Li , Yulin Chen
IPC分类号： H02M3/335 , H02M1/00
摘要： The subject application provides a zero-voltage switching flyback converter comprising: a transformer having a primary winding and a secondary winding; a primary switch and a secondary switch for conducting the currents flowing in the primary winding and secondary winding respectively. A timing control method for operating the flyback converter are provided to accomplish zero-voltage switch by turning on the secondary switch twice within one switching power cycle.

6. 发明申请

US20230126285A1 REDOX FLOW BATTERY SYSTEM AND OPERATING METHOD 有权
公开(公告)号：US20230126285A1
公开(公告)日：2023-04-27
申请号：US17913948
申请日：2021-03-10
申请人： VOITH PATENT GMBH
发明人： Thomas Lüth
IPC分类号： H02J7/00 , H02M3/335 , H01M8/18 , H01M8/04858
摘要： A redox flow battery system includes at least two battery modules, a bidirectional converter, and a controller. The battery modules are connected in series and are connected to the converter. Each battery module has a cell array with a plurality of redox flow cells and a tank device for storing electrolyte and supplying electrolyte to the cell array. The battery system further includes a DC-to-DC converter for each battery module, one terminal of each DC-to-DC converter being connected to one battery module, and a second terminal of each DC-to-DC converter being connected to a common DC bus. An additional converter is connected to the DC bus. The controller is connected to the additional converter and to the DC-to-DC converters in such a way that the controller can control the additional converter and the DC-to-DC converters.

7. 发明授权

US11637724B2 Coding schemes for communicating multiple logic states through a digital isolator 有权
公开(公告)号：US11637724B2
公开(公告)日：2023-04-25
申请号：US17334445
申请日：2021-05-28
申请人： Analog Devices, Inc.
发明人： Eric C. Gaalaas , Dongwan Ha , Jason J. Ziomek , Bikiran Goswami , Brian Jadus
IPC分类号： H04L25/02 , H02M3/335
摘要： Methods and apparatus are disclosed for communicating multiple logic states across a digital isolator. The digital isolator is a universal serial bus (USB) isolator in some embodiments. The digital isolator includes one or more single-bit data channels. Three or more logic states of information are transmitted across the single-bit data channel(s). The logic states are distinguished by a pulse sequence, and in particular a number of edges of the pulse sequence and a final value or final edge of the pulse sequence.

8. 发明授权

US11637502B2 Startup process for a dual active bridge converter to prevent over-voltage failure and thermal run-away 有权
公开(公告)号：US11637502B2
公开(公告)日：2023-04-25
申请号：US17484823
申请日：2021-09-24
申请人： Deere & Company
发明人： Brij N. Singh , Tianjun Fu , Zachary Wehri
IPC分类号： H02M3/335 , H02M1/36 , H02M1/32
摘要： A system and method for controlling a dual active bridge based DC/DC converter. A controller implements a startup control scheme and DC bus pre-charge routine to prevent damage to the converter upon startup. During startup of the converter, the startup control process can be used to prevent excessive phase-shift and the DC bus pre-charge routine adjusts the pulse width modulated duty cycle by increasing the dead time between signals, resulting in a decreased DC bus capacitor.

9. 发明授权

US11634034B1 Rapid transistor switching in a converter with limited capacitance 有权
公开(公告)号：US11634034B1
公开(公告)日：2023-04-25
申请号：US17899960
申请日：2022-08-31
申请人： Rolls-Royce Deutschland Ltd & Co KG
发明人： Uwe Waltrich , Stanley Buchert
IPC分类号： B60L15/00 , H02M3/335 , H02M7/219
摘要： A power electronics converter includes a converter commutation cell having a power circuit and a gate driver circuit. The power circuit includes at least one power semiconductor switching element and at least one capacitor. Each power semiconductor switching element is included in a power semiconductor prepackage. The gate driver circuit is configured to provide switching signals to a gate terminal of each power semiconductor switching element, and a peak rated power output of the power electronics converter is greater than 25 kW and a value of a converter parameter γ is less than or equal to 150 fFs/W, where the converter parameter γ is a total rated capacitance of the at least one capacitor of the power circuit divided by a product of the peak rated power output of the power electronics converter and a maximum switching frequency of the switching signals.

10. 发明申请

US20230122794A1 THREE-PHASE LLC CONVERTERS WITH INTEGRATED MAGNETICS 有权
公开(公告)号：US20230122794A1
公开(公告)日：2023-04-20
申请号：US17841954
申请日：2022-06-16
申请人： VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
发明人： Rimon Gadelrab , Fred C. Lee
IPC分类号： H02M3/335 , H02M3/00 , H01F27/24 , H01F27/28
摘要： Three-phase interleaved resonant converters with integrated magnetics are described. In various examples, transformers are integrated into a transformer core of a converter. A primary side circuit includes a set of circuit segments corresponding to phases of the three-phase interleaved converter. Each of the circuit segments include an integrated winding component that provides a transformer primary winding and a resonant inductor connected in series.

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