公开(公告)号：US20220077795A1

公开(公告)日：2022-03-10

申请号：US17417311

申请日：2019-12-12

Applicant: Hitachi Astemo, Ltd.

Inventor： Shinyu KO ,  Kohei MYOEN ,  Eigo KISHIMOTO

IPC: H02P6/08 ,  B60L15/20 ,  B60L53/20 ,  B60L58/12 ,  B60L58/18

Abstract: A first torque calculation unit 114 calculates torque TQ_DC currently generated by a motor 106 based on a DC current DC1. A second torque calculation unit 115 calculates torque TQ_UVW currently generated by the motor 106 based on U-phase, V-phase, and W-phase currents. A torque limit calculation unit 116 calculates a torque limit TQ_LMT1 using a torque limit characteristic map measured in advance based on a current limit DC_LMT1. A torque limit correction unit 117 compares first torque TQ_DC with second torque TQ_UVW to calculate a torque variation degree KP1. Then, the torque limit TQ_LMT1 is corrected using the variation degree KP1 to calculate a torque limit TQ_LMT2. As a result, even if required torque reaches the torque limit, the DC current does not exceed the current limit, and the output of the motor can be fully utilized by approaching the current limit.

公开(公告)号：US20230155529A1

公开(公告)日：2023-05-18

申请号：US17911785

申请日：2020-12-28

Applicant: Hitachi Astemo, Ltd.

Inventor： Shun TANIGUCHI ,  Kazuaki TOBARI ,  Noriya NAKAO ,  Toshiyuki AJIMA ,  Kenichi YOSHIDA ,  Kentaro MATSUO ,  Eigo KISHIMOTO

IPC: H02P21/14 ,  H02P21/22 ,  H02P27/12 ,  B60L15/20

CPC classification number: H02P21/141 ,  H02P21/22 ,  H02P27/12 ,  B60L15/20 ,  H02P2207/05

Abstract: There is provided a synchronous machine control device capable of improving the performance of a motor without complicating a control system. The synchronous machine control device controls a power converter (2) that supplies electric power to a synchronous machine (1). The synchronous machine control device includes a first magnetic flux command computation unit (21) that computes a first magnetic flux command value (φd*, φq*) from a current command value (Id*, Iq*) of the synchronous machine (1), a magnetic flux estimation unit (23) that estimates a magnetic flux value (φdc, φqc) of the synchronous machine (1) from a current detection value (Idc, Iqc) of the synchronous machine (1), and a voltage computation unit (19) that creates a voltage command value (Vd*, Vq*) of the power converter such that the first magnetic flux command value (φd*, φq*) coincides with the magnetic flux value (φdc, φqc).