Title:
FIELD CONTROL CIRCUIT OF SERIES MOTOR
Document Type and Number:
Japanese Patent JPS6082093
Kind Code:
A
Abstract:
PURPOSE:To reduce the size of a field weaking unit and to eliminate the contact of the unit by connecting a semiconductor switch capable of controlling to energize in both directions further in parallel with a branch resistor connected in parallel with the field winding of a DC series motor. CONSTITUTION:An AC power transformed by a transformer 2 is rectified by a diode rectifier 4, and flowed to a motor armature 6 through a DC reactor 5 and a motor field winding 7 connected in series with the armature 6. A branch resistor 8 is connected in parallel with the field winding 7, and the pulsating component of the pulsating DC current is branched to the resistor 8. Further, parallel thyristors 21, 22 connected in anti-parallel are connected in parallel with the resistor 8. Either one or both of the thyristors 21, 22 is controlled to control the field weaking of the series motor.
Inventors:
KINOSHITA SHIGENORI
Application Number:
JP18965383A
Publication Date:
May 10, 1985
Filing Date:
October 11, 1983
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
B60L15/20; H02P7/282; (IPC1-7): H02P7/282
Attorney, Agent or Firm:
Iwao Yamaguchi