Title:
REVOLUTION CONTROLLING DEVICE FOR DC MOTOR
Document Type and Number:
Japanese Patent JPS5815475
Kind Code:
A
Abstract:
PURPOSE:To remove the noise constituent for the titled motor by a method wherein an AC signal, in which the amplitude of carrier was modulated in accordance with a revolution speed signal, is generated as a balanced signal and a speed error information is obtained by composing it of the differential voltage existed between one end and other end of said balanced output and the prescribed reference voltage. CONSTITUTION:The output VG of the AC generator 1, which performs the function as a speed detector too, is constituted so that it will be turned to a balanced output. One end of the balanced output is applied to the negative- phase input of the first comparator 2a, and other end of the balanced output is applied to the positive-phase input of the second comparator 2b. Then, the reference voltage of VR is applied in between the positive input of the first comparator 2a and the negative input of the second comparator 2b. The differential output between the two comparators 2a and 2b is added up using an adder 4, and used as an input of a driving amplifier of filter structure. Accordingly, the error information alone can be extracted and a constant-speed control can be performed on the motor.
Inventors:
ISHIZUKA KAZUNORI
Application Number:
JP11413081A
Publication Date:
January 28, 1983
Filing Date:
July 20, 1981
Export Citation:
Assignee:
PIONEER ELECTRONIC CORP
International Classes:
H02P7/06; H02P7/288; H02P23/00; (IPC1-7): H02P5/06
Attorney, Agent or Firm:
Fujihiko Motohiko