Title:
DC MOTOR DRIVE CIRCUIT
Document Type and Number:
Japanese Patent JPS5815473
Kind Code:
A
Abstract:
PURPOSE:To prevent the simultaneous operation of a start circuit and a stop circuit at the time of switching control signals ON and OFF by displacing the operating timings of a motor drive power transistor and a brake power transistor. CONSTITUTION:When a motor is started, a control signal MTC becomes LOW level, and a transistor Q2 is conducted. Since Zener diode voltage is applied to a transistor Q4, the latter is forwardly biased and is conducted, while a transistor Q3 is interrupted. When the transistor Q4 is conducted, a transistor Q6 is conducted, thereby starting a motor M. When the transistor Q3 is interrupted, a transistor Q5 is not conducted, thereby causing a brake circuit not to be operated.
Inventors:
FUJII NOBUHIKO
Application Number:
JP11160181A
Publication Date:
January 28, 1983
Filing Date:
July 17, 1981
Export Citation:
Assignee:
TOKYO ELECTRIC CO LTD
International Classes:
H02P1/18; H02P1/02; H02P3/12; H02P7/288; (IPC1-7): H02P1/18; H02P3/06; H02P7/28
Attorney, Agent or Firm:
Takayoshi Hayashi