Electricity: motive power systems – Constant motor current – load and/or torque control
Patent
1993-08-02
1996-05-21
Shoop, Jr., William M.
Electricity: motive power systems
Constant motor current, load and/or torque control
318434, 318433, 318362, H02P 700
Patent
active
055192947
ABSTRACT:
A method and device for controlling the torque of a brushless DC motor used in an electric motorcycle, in which a single current loop is employed to obtain a feedback current by a current detector from a DC bus which simplifies the construction of the circuit scheme. The device of this invention operates by two input signals; one of them is a torque command signal to generate a positive torque of the motor, and the other is brake command signal to generate a negative torque of the motor so as to operate a control brake command and to store the energy generated during a braking operation into a battery of the motorcycle, as well as to stop the rotation of the brushless DC motor within 120.degree. of its electrical angle of reversed rotation.
REFERENCES:
patent: 4322669 (1982-03-01), Fukuma et al.
patent: 4833388 (1989-05-01), Dorner
patent: 5289890 (1994-03-01), Toyoda et al.
Chang Hong-Shi
Chen Tshaw-Chuang
Shieh Yaw-Shih
Yung Huann-Jen
Industrial Technology Research Institute
Liauh W. Wayne
Masih Karen
Shoop Jr. William M.
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