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1. (WO2018121548) ELECTRIC DRIVE APPARATUS, CHOPPER, DC MOTOR, AND ELECTRIC DEVICE

Pub. No.:    WO/2018/121548    International Application No.:    PCT/CN2017/118757
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Wed Dec 27 00:59:59 CET 2017
IPC: H02K 23/36
H02P 7/292
Applicants: UNIVERSITY OF SHANGHAI FOR SCIENCE AND TECHNOLOGY
上海理工大学
Inventors: JIN, Aijuan
金爱娟
LI, Shaolong
李少龙
Title: ELECTRIC DRIVE APPARATUS, CHOPPER, DC MOTOR, AND ELECTRIC DEVICE
Abstract:
A DC electric drive apparatus and an electric device. The DC electric drive device (10) is provided in an electric device to drive the electric device, and comprises: a DC motor (11), for driving the electric device; a DC power source, for outputting constant-voltage DC power to the DC motor; and a chopper (12), for converting the constant-voltage DC power into variable-voltage DC power according to a drive signal and providing the variable-voltage DC power to the DC motor. The DC motor has 2j armature winding branches (16) each consisting of m windings (16a), 2j × m commutator segments connected to the windings, and two brush sets (17) respectively connected to two power line sets of the DC motor and in contact with the commutator segments. Each of the brush sets comprises j brushes (18). Each of the power line sets comprises j power lines. The chopper has k bridge arm portions (19), and each of the bridge arm portions comprises j bridge arm units (20) connected to j power lines of one power line set in one-to-one correspondence. Each of the bridge arm units outputs a current for two armature winding branches through correspondingly connected power lines, and the armature winding branches generate an output torque to drive the electric device. Both j and m are positive integers not less than 2, and k is 1 or 2.