Title:
REGENERATIVE BRAKING AND CONTROL SYSTEM FOR DC SHUNT MOTOR
Document Type and Number:
Japanese Patent JPS6481601
Kind Code:
A
Abstract:
PURPOSE:To enable reliable switching between regenerative braking and powering without requiring a rotation detector and the like, by carrying out switching based on a preset ON time of a regenerative chopper. CONSTITUTION:Under a forward powering mode, field control FETs 9, 12 are controlled and an armature chopper FET 4 is also controlled. Upon switching to rearward powering under this condition, neutral switching condition is detected and a main contacted 2 is opened. Upon finish of switching, the armature chopper FET 4 is turned ON to supply regenerative current. Switching from regenerative braking to powering is carried out when ON time of chopper reaches to a setting time. Upon switching to powering, field control FETs 10, 11 are controlled. Consequently, possibility of regenerative braking can be judged without requiring a rotation detector.
Inventors:
KIKUCHI SANPEI
Application Number:
JP23556787A
Publication Date:
March 27, 1989
Filing Date:
September 18, 1987
Export Citation:
Assignee:
NIPPON YUSOKI CO LTD
International Classes:
B60L7/12; (IPC1-7): B60L7/12
Domestic Patent References:
| JPS5950503B2 | 1984-12-08 | |||
| JPS5768601A | 1982-04-27 |
Attorney, Agent or Firm:
Nakamura Shigenobu