Title:
CONSTANT-SPEED CONTROLLER FOR MOTOR
Document Type and Number:
Japanese Patent JPS58130789
Kind Code:
A
Abstract:
PURPOSE:To reduce the torque ripple of a DC motor by comparing the voltage of a condenser forming a low pass filter between a power source and the motor and a rotating speed deviation voltage and controlling the motor driving transistor with the compared result. CONSTITUTION:An operational amplifier 6 compared the speed voltage from a tachometer generator 8 with the speed reference voltage of an input terminal 7. The output of the amplifier 6 becomes positive at the starting time, the voltage of the condenser 9 is low, and the voltage of an input terminal 5b is lower than the voltage of an input terminal 5a, and the output of a Schmitt trigger 5 becomes ''H'' level, a transistor 4 turns ON, and a motor 1 is started. When approaching to the vicinity of the set speed, the deviation voltage form the amplifier 6 decreases, the voltage at the input terminal 5a becomes lower than that at the input terminal 5b, the transistor 4 turns OFF, and the voltage of the condenser 9 decreases. When the voltage at the input terminal 5b becomes lower than that at the input terminal 5a, the transistor 4 turns ON, and the voltage of the condenser 9 rises. Thereafter, the operation is repeated.
More Like This:
| JP2002044978 | MOTOR-DRIVEN ACTUATOR |
Inventors:
BAN ITSUKI
Application Number:
JP1168182A
Publication Date:
August 04, 1983
Filing Date:
January 29, 1982
Export Citation:
Assignee:
SEKOH GIKEN KK
International Classes:
H02P7/288; (IPC1-7): H02P5/16
Domestic Patent References:
| JPS5513673A | 1980-01-30 |