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公开(公告)号：US20240333129A1
公开(公告)日：2024-10-03
申请号：US18251135
申请日：2020-11-11
发明人： Takeshi KIKUCHI , Fuminori NAKAMURA , Ryosuke UDA
CPC分类号： H02M1/007 , H02M1/0095 , H02M1/32 , H02M1/36 , H02M1/4233 , H02M7/145 , H02M7/493 , H02M1/0077 , H02M7/53871
摘要： A power conversion system includes: a self-excited converter connected between an AC power system, and a first DC main line and a DC return line; a separately-excited converter connected between the AC power system, and the DC return line and a second DC main line; and a control device. When activating the self-excited converter and the separately-excited converter, the control device activates the self-excited converter, and after completion of activation of the self-excited converter, activates the separately-excited converter. The self-excited converter can be activated first to take advantage of a function of the self-excited converter that is not included in the separately-excited converter.
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公开(公告)号：US20240313634A1
公开(公告)日：2024-09-19
申请号：US18185912
申请日：2023-03-17
CPC分类号： H02M1/088 , H02M1/0032 , H02M1/36 , H02M3/1584
摘要： Methods and circuits that enable parallel operation of power converters such that phase shedding is possible without excessively long startup times. More specifically, embodiments utilize reduced gate-drive (RGD) low-dropout (LDO) circuits within individual power converters to enable parallel power converter systems that support phase shedding while eliminating a “ping pong” effect (synchronization problems). The RGD capability of each parallel power converter allows each power converter to come online asynchronously without affecting other parallel power converters. In particular, the RGD capability allows full power up of the power converters with substantially reduced delays for full charge balancing and soft-start. For example, embodiments of the invention typically have delays for RGD charge balancing measured in hundreds of microseconds, not tens of milliseconds as with charge balancing in conventional, non-RGD power converters.
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公开(公告)号：US20240291380A1
公开(公告)日：2024-08-29
申请号：US18658640
申请日：2024-05-08
发明人： Yukun WU , Peiqing HU , Shanchun ZHANG
CPC分类号： H02M1/32 , H02J7/0047 , H02J7/007182 , H02M1/36 , H02J2207/50
摘要： This application provides a soft-start circuit, a control method thereof, and a power supply device. The soft-start circuit includes a controller, a switch unit, a free-wheeling unit, an energy storage unit, and an energy release unit. In a first time period, the controller is configured to control the switch unit to be on, so that the power module charges the energy storage unit through the energy release unit. In a second time period, the controller is configured to control the switch unit to be off, so that the energy release unit discharges the energy storage unit through the free-wheeling unit. The first time period and the second time period are one operating cycle. According to embodiments of this application, a soft-start function can be implemented. In addition, a smaller size is occupied, and costs are reduced.
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公开(公告)号：US20240283438A1
公开(公告)日：2024-08-22
申请号：US18583618
申请日：2024-02-21
发明人： Robert Maier
IPC分类号： H03K17/06 , H02M1/36 , H03K17/081
CPC分类号： H03K17/063 , H02M1/36 , H03K17/08104
摘要： An output stage for an inverter for driving an electrical machine includes a half-bridge containing a current valve embodied as a JFET. The current valve is configured to be controlled by a driver. The output stage comprises a cutout circuit for opening the current valve when the driver has no supply voltage, wherein the cutout circuit includes a capacitor and a diode, which are connected in series between a gate terminal and a source terminal of the current valve, an additional JFET for bypassing the diode, and a drive, which keeps a voltage between a gate terminal and a source terminal of the additional JFET small enough to close the additional JFET as long as a supply voltage of the driver is large enough.
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公开(公告)号：US20240283364A1
公开(公告)日：2024-08-22
申请号：US18171214
申请日：2023-02-17
申请人： NXP USA, Inc.
CPC分类号： H02M3/33523 , H02M1/0009 , H02M1/36
摘要： One example discloses a switched mode power supply (SMPS), comprising: an inductor configured to supply an inductor current to a load; a charging circuit configured to increase an inductor current during a primary stroke time window, and to decrease the inductor current during a secondary stroke time window; wherein the charging circuit is configured to end the primary stroke when the inductor current reaches a high current limit; wherein the charging circuit is configured to set the secondary stroke time window to a predicted duration; wherein the charging circuit is configured to automatically start the primary stroke after the predicted duration and measure the inductor current at the end of a detection window; wherein if the inductor current is below a low limit at the end of the detection window, then the charging circuit is configured to shorten the predicted duration; and wherein if the inductor current is above the low limit at the end of the detection window, then the charging circuit is configured to lengthen the predicted duration.
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6.发明授权公开(公告)号：US12068599B2
公开(公告)日：2024-08-20
申请号：US16243612
申请日：2019-01-09
发明人： Meir Adest , Guy Sella , Lior Handelsman , Yoav Galin , Amir Fishelov , Meir Gazit
CPC分类号： H02J1/102 , H02H7/1227 , H02J1/10 , H02J3/38 , H02J3/381 , H02J3/388 , H02M1/36 , H04B3/548 , H02J7/35 , H02J2300/24 , H02J2300/28 , Y02E10/56 , Y02E10/76
摘要： A protection method in a distributed power system including of DC power sources and multiple power modules which include inputs coupled to the DC power sources. The power modules include outputs coupled in series with one or more other power modules to form a serial string. An inverter is coupled to the serial string. The inverter converts power input from the string and produces output power. When the inverter stops production of the output power, each of the power modules is shut down and thereby the power input to the inverter is ceased.
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公开(公告)号：US20240275298A1
公开(公告)日：2024-08-15
申请号：US18643420
申请日：2024-04-23
发明人： Yannick HAGUE , Romain LAUNOIS
摘要： Disclosed herein is a voltage converter including input nodes configured to receive an input voltage, output nodes configured to deliver an output voltage, a rectifying bridge coupled between the input nodes and the output nodes, a capacitor and a resistor series-coupled between the output nodes, and a thyristor coupled between one terminal of the resistor and a given one of the output nodes, wherein the thyristor is configured to allow flow of a positive current from the resistor to the given one of the output nodes. A control input is configured to receive a control signal, wherein the control signal biases a gate of the thyristor to control the flow of current through the thyristor. transient voltage suppressor circuit is coupled to the gate of the thyristor, configured to activate the thyristor upon exceeding a threshold voltage.
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公开(公告)号：US12057771B2
公开(公告)日：2024-08-06
申请号：US18468746
申请日：2023-09-18
发明人： Xiaolei Wang , Peng Zhu , Jianpeng Lin , Haixin Wu , Hao Sun
CPC分类号： H02M1/36 , G01R19/04 , H02M1/088 , H02M3/33576 , H02M3/33584
摘要： A voltage spike measurement circuit for a power switch includes a rectifier unit, a capacitive divider unit and a discharge unit, the rectifier unit configured to receive a voltage signal at both ends of a power switch and output a rectified signal; the capacitive divider unit includes at least two capacitors connected in series and configured to receive the rectified signal, divide the rectified signal based on a capacitance ratio of the at least two capacitors, and output a divider signal to a digital signal processor to calculate a voltage spike measurement value of the power switch; and the discharge unit connected in parallel to the capacitive divider unit.
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公开(公告)号：US12034365B2
公开(公告)日：2024-07-09
申请号：US17439055
申请日：2020-03-13
发明人： Rubinic Jaksa
CPC分类号： H02M1/36 , H02M1/0058 , H02M3/01 , H02M3/33571 , H02M3/33573 , H02M3/33592 , H02M1/4208
摘要： An LLC converter includes a switching stage including primary transistors, a resonant stage connected to the switching stage, a transformer including a primary winding connected to the resonant stage and a secondary winding coupled with the primary winding, a rectifying stage connected to the secondary winding of the transformer and providing an output voltage of the LLC converter, and a controller configured and/or programmed to, during start-up, control the output voltage by switching the primary transistors based on a first reference voltage that exponentially increases during start-up and a second reference voltage that is based on a resonant current of the resonant stage.
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10.发明公开公开(公告)号：US20240213763A1
公开(公告)日：2024-06-27
申请号：US18391001
申请日：2023-12-20
发明人： Marc Rasch , Sebastian Besold
CPC分类号： H02H7/1225 , H02H7/222 , H02M1/0009 , H02M1/327 , H02M1/36 , B60L15/007
摘要： A switch device includes a switch unit which has first and second connections, a control connection, and multiple switches connected between the first and second connection and which are jointly activated or activatable by the control connection. A method comprises reading a measurement signal via an interface into a measuring unit, wherein the measurement signal represents an actual parameter of the switch unit, determining a fault state of the switch unit if the actual parameter is in a predetermined relationship with a predefined target parameter, and providing a fault protection signal in response to the determined fault state, wherein the fault protection signal is configured to activate at least one fault protection switch and thereby apply a protection signal to the control connection, by which the switches are closed or kept closed.
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