公开(公告)号：US10554156B2

公开(公告)日：2020-02-04

申请号：US15692256

申请日：2017-08-31

Applicant: Johnson Electric S.A.

Inventor： You Qing Xiang ,  Shi Wen Wang ,  Wu Feng Qiu ,  Ying Chao Li ,  Yun Chen ,  Lian Zhong Zhang ,  Jun Zhang

IPC: H02P3/18 ,  H02P3/02 ,  H02P25/16

Abstract: A motor driving circuit, an application device, and a motor braking method are provided. The driving circuit includes an inverter, a braking unit, and a MCU. The inverter is configured to drive a motor. The braking unit includes a sampling circuit, a discharge circuit, and a switch group. The MCU is connected to the sampling circuit, the discharge circuit, and the switch group, and is configured to control the sampling circuit to detect a voltage across the inverter and obtain a detected value when receiving the emergency signal, compare the detected value to a preset voltage or a preset voltage range, and transmit a control signal to activate the discharge circuit when the detected value is greater than the preset voltage or exceeds the preset voltage range.

公开(公告)号：US10476424B2

公开(公告)日：2019-11-12

申请号：US15814757

申请日：2017-11-16

Applicant: JOHNSON ELECTRIC S.A.

Inventor： Youqing Xiang ,  Shiwen Wang ,  Wanjun Wang ,  Jin Yang ,  Jun Zhang

IPC: A47J27/00 ,  H02P29/60 ,  H02P6/16

Abstract: A motor application apparatus is provided. The apparatus includes a motor, a cooling device, a temperature sensor to detect a temperature of the motor, a microcontroller configured to output a controlling signal to control rotation of the motor and acquire a supply current and a rotation speed of the motor in real time. When the temperature of the motor is higher than a predetermined value or the microcontroller determines that the motor is in a high temperature operation state according to the current and the rotation speed, the microcontroller outputs a protection signal to start the cooling device.