公开(公告)号：US12224689B2

公开(公告)日：2025-02-11

申请号：US18247768

申请日：2020-12-23

Applicant: Mitsubishi Electric Corporation

Inventor： Kazuhiko Hotta ,  Takuya Nakamura ,  Ryota Kurosawa

IPC: H02P21/00 ,  H02P21/22 ,  H02P27/12

Abstract: A ventilation blower includes an inverter main circuit, a motor body driven by the main circuit, a control circuit that controls the main circuit, and a storage device. The storage device stores an angular velocity of a motor rotor and a torque current value at a first operation point at which to obtain a first air volume on a first load characteristic, and the angular velocity and the torque current value at a second operation point at which to obtain a second air volume on the load characteristic, the second air volume being different from the first air volume. The control circuit calculates, from the angular velocities and the torque current values at the first and second operation points, the angular velocity and the torque current value at a third operation point at which to obtain a third air volume on the load characteristic.

公开(公告)号：US11688548B2

公开(公告)日：2023-06-27

申请号：US17387256

申请日：2021-07-28

Applicant: Mitsubishi Electric Corporation

Inventor： Mao Kawamura ,  Hayato Tanabe ,  Takuya Nakamura

IPC: H02M7/537 ,  H01F27/34 ,  H01F27/24 ,  H01F27/28 ,  H01F27/08 ,  H02M1/00

CPC classification number: H01F27/346 ,  H01F27/08 ,  H01F27/24 ,  H01F27/28 ,  H02M1/0009 ,  H02M7/537

Abstract: The power conversion device includes: a boost, converter which includes a magnetically-coupled reactor and a plurality of semiconductor switching elements connected to the magnetically-coupled reactor; an inverter; a cooler for cooling the magnetically-coupled reactor; a bus bar which is a conductive wiring member; and a current sensor for detecting a magnetic flux generated around the bus bar. The magnetically-coupled reactor includes a first winding, a second winding, and a core for magnetically coupling the first winding and the second winding. The core has a composite magnetic body containing soft magnetic powder and a binder, and at least parts of the first winding and the second winding are embedded in the composite magnetic body. The cooler is provided in contact with the magnetically-coupled reactor. The current sensor is provided on a side opposite to the magnetically-coupled reactor with the cooler therebetween.

公开(公告)号：US11451115B2

公开(公告)日：2022-09-20

申请号：US16627526

申请日：2017-07-18

Applicant: Mitsubishi Electric Corporation

Inventor： Takuya Nakamura ,  Junji Okada

IPC: H02K9/08 ,  H02K11/33 ,  H02K9/22 ,  H05K1/02 ,  H05K7/20

Abstract: An electric motor includes: a stator having a sleeve shape; a rotor inside the stator; a shaft coupled to the rotor and stretching along a central axis of the stator; a board case on one end side of the stator in a direction along the central axis; a circuit board on an opposite side of the stator with the board case interposed; a heat generating component on a mounting surface, which is opposite to a surface of the circuit board oriented to a side of the stator; a casing that covers a side of the mounting surface; and a heat transfer component between a surface of the casing that faces the circuit board and the heat generating component. The board case is provided with an extension portion that extends toward the circuit board. The heat transfer component is formed with a first engagement portion with which the extension portion engages.