公开(公告)号：US20220329192A1

公开(公告)日：2022-10-13

申请号：US17715013

申请日：2022-04-06

Applicant: NIDEC ELESYS CORPORATION

Inventor： Satoshi Shimazu ,  Yuhi Nakada

IPC: H02P27/06 ,  H02P29/032

Abstract: An inverter device is provided. The inverter device converts power from a power source and drives a motor. The inverter device includes an inverter circuit having a switch, a driver circuit that switches the switch on and off, and a controller that controls the driver circuit. The controller has a speed calculator used to calculate a minimum speed of the motor based on a power source voltage. After the controller performs fail-safe control, when a speed of the motor is less than the minimum speed, the fail-safe control is ended.

公开(公告)号：US11870375B2

公开(公告)日：2024-01-09

申请号：US17715007

申请日：2022-04-06

Applicant: NIDEC ELESYS CORPORATION

Inventor： Takashi Koikegami ,  Satoshi Shimazu ,  Yuhi Nakada

IPC: G05B1/06 ,  H02P21/18 ,  B60L15/00 ,  B60L15/20 ,  B60K1/00

CPC classification number: H02P21/18 ,  B60K1/00 ,  B60L15/007 ,  B60L15/20

Abstract: A motor apparatus is provided. The motor apparatus includes a motor having a rotor and a stator, an inverter used to covert an input voltage into a three-phase alternating current (AC) voltage and provide the three-phase AC voltage to the motor, an inverter controller used to control the inverter, and a rotation angle sensor. The rotation angle sensor is fixed to the motor and is used to detect a rotation angle of the motor. The inverter controller includes a calculator. The calculator calculates an offset angle of an installation position of the rotation angle sensor according to a difference between a measured value and a theoretical value of a voltage phase of the motor.

公开(公告)号：US11791758B2

公开(公告)日：2023-10-17

申请号：US17715013

申请日：2022-04-06

Applicant: NIDEC ELESYS CORPORATION

Inventor： Satoshi Shimazu ,  Yuhi Nakada

IPC: H02P27/08 ,  H02P27/06 ,  H02P29/032

CPC classification number: H02P27/06 ,  H02P29/032

Abstract: An inverter device is provided. The inverter device converts power from a power source and drives a motor. The inverter device includes an inverter circuit having a switch, a driver circuit that switches the switch on and off, and a controller that controls the driver circuit. The controller has a speed calculator used to calculate a minimum speed of the motor based on a power source voltage. After the controller performs fail-safe control, when a speed of the motor is less than the minimum speed, the fail-safe control is ended.

公开(公告)号：US20220385206A1

公开(公告)日：2022-12-01

申请号：US17752873

申请日：2022-05-25

Applicant: NIDEC ELESYS CORPORATION

Inventor： Kazuhiro SAKAI ,  Satoshi Shimazu ,  Yuhi Nakada

IPC: H02M7/537 ,  H02M1/32 ,  H02P27/06 ,  B60L3/00

Abstract: The disclosure relates to an inverter device, including: an inverter circuit including a plurality of switching elements and a capacitor; an active discharge circuit including a first discharge resistor and a discharge switch connected in series, and connected between a positive electrode and a negative electrode of the capacitor; and a control circuit including a controller respectively connected to the switching elements and the discharge switch. The controller controls the switching elements and the discharge switch. The controller turns on the discharge switch to discharge the capacitor when the controller receives a discharge command from outside the inverter device and an electric motor is rotating.

公开(公告)号：US20220329185A1

公开(公告)日：2022-10-13

申请号：US17715007

申请日：2022-04-06

Applicant: NIDEC ELESYS CORPORATION

Inventor： Takashi Koikegami ,  Satoshi Shimazu ,  Yuhi Nakada

IPC: H02P21/18 ,  B60K1/00 ,  B60L15/20 ,  B60L15/00

Abstract: A motor apparatus is provided. The motor apparatus includes a motor having a rotor and a stator, an inverter used to covert an input voltage into a three-phase alternating current (AC) voltage and provide the three-phase AC voltage to the motor, an inverter controller used to control the inverter, and a rotation angle sensor. The rotation angle sensor is fixed to the motor and is used to detect a rotation angle of the motor. The inverter controller includes a calculator. The calculator calculates an offset angle of an installation position of the rotation angle sensor according to a difference between a measured value and a theoretical value of a voltage phase of the motor.