Title:
MOTOR CONTROL CIRCUIT
Document Type and Number:
Japanese Patent JP3814061
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a motor control circuit for a multipole brush motor which protects a semiconductor element from a short circuit current when stopping a motor and, at the same time, can realize soft stopping, by relieving the brak ing force applied to the motor at the time of short-circuiting.
SOLUTION: A motor control circuit which controls the rotating speed of a motor is constituted of a four-pole motor 1, a rotating speed detecting circuit 2 which detects the rotation of the motor l as a pulse, an F/V conversion circuit 3 which converts the rotational pulse of the motor 1 into a voltage, a rotating speed setting circuit 4 which sets the rotating speed of the motor 1, a comparator and control circuit 5 which outputs an output by comparing the outputs of the circuits 4 and 3 with each other, an intermitting means 6 which controls the turning on/off of the negative pole of the motor 1 in accordance with the output of the circuit 5, and a diode 7 connected to the means 6 and a ground. The control circuit is constituted so that the circuit may make the electric current flow to the ground side through the diode 7 connected in series between a semiconductor element and the ground.
Inventors:
Hidekazu Uchiyama
Studying hard
Norikazu Shimizu
Studying hard
Norikazu Shimizu
Application Number:
JP26131697A
Publication Date:
August 23, 2006
Filing Date:
September 26, 1997
Export Citation:
Assignee:
Mitsuba Co., Ltd.
Honda motor industry stock company
Honda motor industry stock company
International Classes:
H02P3/12; H02K23/66; H02P7/285; (IPC1-7): H02P3/12; H02K23/66; H02P7/285
Domestic Patent References:
| JP9023627A | ||||
| JP54073224A | ||||
| JP8066074A | ||||
| JP63190585A | ||||
| JP3039389U | ||||
| JP61010982A | ||||
| JP8168111A |
Attorney, Agent or Firm:
Yamato Tsutsui
Yoshitaka Kozuka
Ning Takano
Yoshitaka Kozuka
Ning Takano