Title:
AC MOTOR REVOLUTION CONTROL CIRCUIT
Document Type and Number:
Japanese Patent JP3944263
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a revolution control circuit which is composed of small size and light weight components only and by which the revolution of a motor can be increased or decreased toward a predetermined revolution.
SOLUTION: A revolution control circuit changes the charging current of a capacitor 5 and performs the phase control of not only a bidirectional trigger diode 4 but also a TRIAC 3. The AC terminal of a single-phase full-bridge circuit device 61 is connected to a point between one end of an AC power supply 1 and the capacitor 5. A series circuit of a filter capacitor 9 and a diode 8 is inserted between the negative side DC terminal N of the single-phase full- bridge circuit device 61. A P-N-P transistor 7 is inserted between the negative and positive DC terminals N and P of the single-phase full-bridge circuit device 61. A series circuit of a time limiter charging resistor 11 and a time limiter charging capacitor 13 is connected in parallel to the filter capacitor 9 and the connection point between the resistor 11 and the capacitor 13 is connected to the base of the P-N-P transistor 7 through a resistor 12.
Inventors:
Ikuo Okajima
Application Number:
JP17008896A
Publication Date:
July 11, 2007
Filing Date:
June 28, 1996
Export Citation:
Assignee:
Tohnichi Manufacturing Co., Ltd.
International Classes:
H02P1/42; H02M1/08; H02P21/34; H02P23/00; H02P25/04; (IPC1-7): H02P1/42; H02M1/08; H02P5/28
Domestic Patent References:
| JP56029488A | ||||
| JP61185093A |
Attorney, Agent or Firm:
Mizuno Katsufumi
Masayuki Kishida
Koji Shinbe
Kotaro Tani
Masayuki Kishida
Koji Shinbe
Kotaro Tani