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公开(公告)号：US20220094266A1
公开(公告)日：2022-03-24
申请号：US17422469
申请日：2019-11-08
IPC分类号： H02M3/158 , H02M3/335 , H02M7/5387 , H02M1/34
摘要： This DC-pulse power supply device is provided with: a DC power supply; a pulse unit (20) for generating a pulse output using a step-up chopper circuit connected to the DC power supply; and a voltage superimposing unit (30A, 30B) connected to a DC reactor of the step-up chopper circuit. The voltage superimposing unit (30A, 30B) superimposes an amount (Vc, VDCL2) corresponding to a superimposed voltage on the output voltage of the step-up chopper circuit. The pulse unit (20) outputs, in a pulse form, the output voltage (Vo) on which the amount (Vc, VDCL2) corresponding to the superimposed voltage is superimposed by the voltage superimposing unit (30A, 30B). The amount corresponding to the superimposed voltage is superimposed on the pulse output of the step-up chopper circuit, thereby raising the output voltage of the pulse output of the step-up chopper circuit.
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公开(公告)号：US20220094261A1
公开(公告)日：2022-03-24
申请号：US17422506
申请日：2019-11-08
摘要： This DC pulse power supply device includes: a DC power supply unit (10); and a pulsing unit (20) that generates a pulse output using a step-up chopper circuit connected to the DC power supply unit. A clamp voltage unit (30) has an output end that is connected to a connection point (s) between a switching element (22) and a DC reactor (21), and applies a clamp voltage (VC) to one end of the switching element (22). During an off period (Toff) of the step-up chopper circuit, the voltage at both ends of the switching element is clamped so as to prevent damage to the switching element, suppress output voltage fluctuations resulting from load current fluctuations, and suppress power loss caused by a load current and a discharge current flowing through a resistor.
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公开(公告)号：US20220077771A1
公开(公告)日：2022-03-10
申请号：US17415728
申请日：2019-02-01
发明人： Chihiro KAWAHARA , Shinya YANO
摘要： A semiconductor device includes a substrate having a first surface, a first electrode, a second electrode and a third electrode formed on the first surface, a first semiconductor element and a second semiconductor element disposed in the interior of the substrate, a first wiring group electrically connecting the first electrode to the first semiconductor element, and a fourth wiring group electrically connecting the second semiconductor element to the second electrode. The first wiring group includes a first connection part disposed in the interior of the substrate. The fourth wiring group includes a second connection part disposed in the interior of the substrate. When a voltage is applied between the first electrode and the third electrode to cause current to flow through the second electrode, a direction of current flowing through first connection part is opposite to a direction of current flowing through the second connection part.
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公开(公告)号：US11251698B2
公开(公告)日：2022-02-15
申请号：US17153063
申请日：2021-01-20
发明人： Dehong Xu , Kai Dong , Jinfa Zhang
摘要： A power factor correction circuit includes an input power source, a first bridge arm, a second bridge arm, an output capacitor and an active clamp unit. The first bridge arm includes a first switch and a second switch in series. The second bridge arm includes a third switch and a fourth switch in series. The active clamp unit includes a second inductor, a clamp capacitor and a fifth switch. The power factor correction circuit may realize the ZVS function of the first switch and the second switch by the collaboration of the active clamp unit and the conduction/non-conducting state of the first switch, the second switch, the third switch and the fourth switch.
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公开(公告)号：US11245259B2
公开(公告)日：2022-02-08
申请号：US17087831
申请日：2020-11-03
发明人： Lin Lan , Weiqiang Zhang
摘要： Disclosed is a power supply system, including: a high-voltage input power distribution cabinet, a high-low voltage conversion cabinet, and a low-voltage output and control cabinet, the high-low voltage conversion cabinet is provided with at least one high-voltage chamber provided with a high-voltage bus bar, at least one low-voltage chamber provided with a low-voltage bus bar, an insulating partition between the high-voltage chamber and the low-voltage chamber and a plurality of power supply modules; each of the power supply modules bridges the high-voltage and low-voltage chambers and includes a high-voltage cavity, a low-voltage cavity and an isolation unit, connecting terminals of the high-voltage and low-voltage cavities are respectively disposed corresponding to the high-voltage and low-voltage chambers and electrically connected to the high-voltage and low-voltage bus bars respectively, and the isolation unit is connected to one end of the high-voltage cavity and one end of the low-voltage cavity.
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公开(公告)号：US20220037994A1
公开(公告)日：2022-02-03
申请号：US16941763
申请日：2020-07-29
摘要： A method for controlling an active snubber circuit includes measuring a gate voltage at a first transistor and measuring a gate voltage at a second transistor. The method also includes determining whether the first transistor and the second transistor are in the same state based on the gate voltage measured at the first transistor and the gate voltage measured at the second transistor. The method also includes, in response to a determination that the first transistor and the second transistor are in the same state, enabling the active snubber circuit. The method also includes, in response to a determination that the first transistor and the second transistor are not in the same state, disabling the enable signal. The method also includes disabling the active snubber circuit in response to the enable signal being disabled.
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公开(公告)号：US20220021294A1
公开(公告)日：2022-01-20
申请号：US17491544
申请日：2021-10-01
申请人： ABB SCHWEIZ AG
发明人： Stefan RAAIJMAKERS
摘要： A three-phase alternating current (AC) to direct current (DC) power converter includes a boost power factor correction (PFC) circuit that includes a low frequency diode-based converter, and a PFC inductor and a PFC capacitor connected in series together and in parallel to a PFC output of the converter. The boost PFC circuit further includes either a high frequency PFC diode and a high frequency PFC switch or a plurality of high frequency PFC switches. A Ćuk converter includes a first Ćuk inductor and a Ćuk capacitor, a second Ćuk inductor and a high frequency Ćuk diode, and a transformer having a primary side connected in parallel to the PFC capacitor and a secondary side connected in parallel to the Ćuk capacitor.
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公开(公告)号：US11218070B2
公开(公告)日：2022-01-04
申请号：US16799660
申请日：2020-02-24
发明人： Qichen Wang , Ryuji Yamada
IPC分类号： H02M1/34 , H02M7/5387 , H02M7/00
摘要： A snubber module is provided, which constitutes a snubber apparatus attachable to a terminal of a semiconductor module. The snubber module includes: a positive-side capacitor, a first diode and a negative-side capacitor sequentially connected between a positive-side snubber terminal and a negative-side snubber terminal, the positive-side snubber terminal connectable to a positive-side terminal of the semiconductor module, and the negative-side snubber terminal connectable to a negative-side terminal of the semiconductor module; a first coupling terminal directly or indirectly connected to one node of either a first node between the positive-side capacitor and the first diode or a second node between the negative-side capacitor and the first diode; and a housing accommodating the positive-side capacitor, the negative-side capacitor and the first diode, and having provided therein the positive-side snubber terminal, the negative-side snubber terminal and the first coupling terminal in a manner enabling external connection.
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公开(公告)号：US20210320584A1
公开(公告)日：2021-10-14
申请号：US17225537
申请日：2021-04-08
发明人： TAKESHI SHIOMI
IPC分类号： H02M1/34
摘要： A snubber circuit connected to a switching circuit, wherein the switching circuit including a higher side switch element connected between a high potential node and a switch node, a lower side switch element connected between the switch node and a reference potential node, and a bypass capacitor connected between the high potential node and the reference potential node, the snubber circuit comprising: a snubber capacitor; a diode; and a coil, wherein a negative electrode of the snubber capacitor is connected to the reference potential node, an anode of the diode is connected to the switch node and a cathode of the diode is connected to a positive electrode of the snubber capacitor, and one end of the coil is connected to the positive electrode of the snubber capacitor and the other end of the coil is connected to the high potential node.
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公开(公告)号：US11146168B2
公开(公告)日：2021-10-12
申请号：US16910102
申请日：2020-06-24
发明人： Ryuji Yamada
摘要： Provided is a snubber circuit comprising N parallel charging paths each having a positive-side capacitor, a first diode, and a negative-side capacitor sequentially connected in series between a positive-side terminal and a negative-side terminal, and configured to conduct current from the positive-side terminal toward the negative-side terminal; (N+1) parallel discharging paths each having a second diode connected between the negative-side terminal or the negative-side capacitor of kth charging path of N charging paths and the positive-side capacitor of (k+1)th charging path of N charging paths or the positive-side terminal, and configured to counduct current from the negative-side terminal toward the positive-side terminal via at least one of the negative-side capacitor and the positive-side capacitor; and at least one auxiliary capacitor each being connected in parallel to at least one of the N first diodes included on N charging paths and (N+1) second diodes included on (N+1) discharging paths.
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