MOTOR DRIVEN APPLIANCE AND PROTECTION METHOD THEREOF

WIPO Patent Application WO/2022/056797

A1

A motor driven apparatus (20) including a motor (24), a first switching module (25) and a second switching module (21) that are provided on a current path from one terminal of a battery (26) to another terminal of the battery (26), and a MCU (22) connected to the first switching module (25) and the second switching module (21). The first switching module (25) and the second switching module (21) are connected in series to each other, while the first switching module (25) is connected to the motor (24) and adapted to drive the motor (24). The MCU (22) is adapted to control the first switching module (25) and the second switching module (21) separately. The MCU (22) is further adapted to, upon its energization, attempt to control the second switching module (21) to be in a cut-off state until the MCU (22) determines that the first switching module (25) is normal. The MCU (22) attempts to detect failures of the switching elements in the first switching module (25) before it enables operation of the motor (24), so the chance that the motor (24) is damaged because of short-circuit of the first switching module (25) is minimized.

LI YONG MIN (CN)
XIE LI HUA (CN)
ZHANG BAO AN (CN)
LI ZONG FEN (CN)

PCT/CN2020/116027

March 24, 2022

September 18, 2020

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TECHTRONIC CORDLESS GP (US)

H02H11/00

WO2001061818A1

2001-08-23

CN103782469A	2014-05-07
CN110829379A	2020-02-21
CN101039097A	2007-09-19
CN101604945A	2009-12-16
CN107306127A	2017-10-31
CN101741311A	2010-06-16

KING & WOOD MALLENSONS (CN)

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