Title:
MOTOR CONTROL SYSTEM BY VARIABLE VOLTAGE VARIABLE FREQENCY POWER SOURCE
Document Type and Number:
Japanese Patent JPS5819186
Kind Code:
A
Abstract:
PURPOSE:To enhance the utility rate of an inverter and to reduce the loss of a motor power due to harmonic current by alternately pulsating the output currents of two sets of inverters in response to the desired magnetomotive force vector direction, and supplying them to a motor coil. CONSTITUTION:Variable control rectifiers 1, 1' output DC voltages so that the terminal voltage of a motor is set equal to the set value of a potentiometer 21 by the gate pulses from gate controllers 24, 24' so that the same current flow through two sets of coils of the motor 10. Further, the output current is alternately pulse-amplitude modulated in response to the desired magnetomotive force vector direction in power inverters 3, 3' by using a voltage/frequency converter 25, a counter 26 and gate circuits 27, 27', and is then supplied to the motor 10.
Inventors:
NAKANO TAKAYOSHI
Application Number:
JP11647781A
Publication Date:
February 04, 1983
Filing Date:
July 27, 1981
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
H02P27/06; (IPC1-7): H02P7/62
Domestic Patent References:
| JPS55109187A | 1980-08-22 | |||
| JPS5379223A | 1978-07-13 | |||
| JPS5686077A | 1981-07-13 |
Attorney, Agent or Firm:
Namiki Akio