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公开(公告)号：US20240063730A1
公开(公告)日：2024-02-22
申请号：US18270488
申请日：2021-02-25
Applicant: Mitsubishi Electric Corporation
Inventor： Kenji FUJIWARA , Yusuke SHIROUCHI
Abstract: Provided are a sub inverter of a full-bridge constituted by two arms: an arm and an arm, each of which is mounted on a different module, a main controller to drive and control the sub inverter by switching an operation mode between a first mode in which a first arm performs a low-frequency switching operation and a second arm performs a high-frequency switching operation, and a second mode in which the second arm performs a low-frequency switching operation and the first arm performs a high-frequency switching operation, and an operation ratio setting circuitry to set an operation ratio on the basis of a bias of a temperature rise between the modules.
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公开(公告)号：US20230216431A1
公开(公告)日：2023-07-06
申请号：US18008695
申请日：2020-09-09
Applicant: Mitsubishi Electric Corporation
Inventor： Yusuke SHIROUCHI , Kenji FUJIWARA , Takayoshi NAGAI
IPC: H02M7/5387 , B64D47/00 , B60L53/20
CPC classification number: H02M7/53871 , B64D47/00 , B60L53/20 , B64D2221/00 , B60L2200/10
Abstract: A power conversion device is provided between a power supply and a load, and converts power from the power supply and supplies the converted power to the load. The power conversion device includes a plurality of switching elements composed of semiconductor elements, and a control device which generates drive signals for controlling the plurality of switching elements. Voltages are respectively applied to the plurality of semiconductor elements, on the basis of the drive signals generated by the control device. The plurality of semiconductor elements have equivalent failure probabilities due to neutron beams. Thus, a failure of the power conversion device due to neutron beams is prevented, and size increase thereof is suppressed.
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公开(公告)号：US20240396471A1
公开(公告)日：2024-11-28
申请号：US18574755
申请日：2021-07-07
Applicant: Mitsubishi Electric Corporation
Inventor： Ryota ASAKURA , Yusuke SHIROUCHI , Kenji FUJIWARA , Tetsuya KOJIMA
Abstract: A gradationally controlled voltage inverter, which is a power conversion device, controls a gate impedance of a main inverter before a capacitor voltage VDCS of a sub-inverter is controlled at a predetermined voltage so as to be larger than a gate impedance of the main inverter after the capacitor voltage VDCS of the sub-inverter is controlled at the predetermined voltage. This reduces the noise caused by the main inverter when the capacitor voltage VDCS of the sub-inverter is not controlled at the predetermined voltage.
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公开(公告)号：US20240356460A1
公开(公告)日：2024-10-24
申请号：US18683512
申请日：2021-09-03
Applicant: Mitsubishi Electric Corporation
Inventor： Yusuke SHIROUCHI , Ryota ASAKURA , Kenji FUJIWARA
CPC classification number: H02M7/5395 , H02M1/0095 , H02M1/123 , H02M1/385 , H02M1/44 , H02M7/4835
Abstract: A power conversion device which converts power from a power supply and supplies the converted power to a load, includes: a first inverter including first capacitors and a plurality of switching elements; a second inverter including a plurality of switching elements, and second capacitors to which voltages smaller than voltages of the first capacitors are applied; and a control device. The control device performs control with dead times applied to the plurality of switching elements, and performs control so that a voltage variation width of combined voltage of output voltage of the first inverter and output voltage of the second inverter during a dead time period is reduced.
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