MOTOR DRIVING CIRCUIT

• Main Author: HIWATARI MINORU
• Format: Patent
• Language: English
• Published: 22.01.2004
• Edition: 7
• Subjects: CHECKS FOR WINGS; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; ELECTRICITY; FIXED CONSTRUCTIONS; GENERATION; KEYS; LOCKS; SAFES; WINDOW OR DOOR FITTINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING

PROBLEM TO BE SOLVED: To provide a motor driving circuit which enables the elimination of the influence of bounce occurring in comparison output of a voltage comparator 9 without needing many circuit parts. SOLUTION: This motor driving circuit is equipped with window opening/closing switches 1 and 2, an autoswitch 3, a motor 4 for opening and closing of a window, a relay 7 for operation changeover for switching the motor 4 into the drive state or the nondrive state, a charge circuit 5 for charging a capacitive element 5(1) when the window opening/closing switches 1 and 2 are operated, and a voltage comparator 8 which compares the charge voltage of the charge circuit 5 with the reference voltage, and this stops the drive of the motor by switching the contact of the relay 7 onto the drive stop side by the comparison output generated from the voltage comparator 8 when the charge voltage of the charge circuit 5 reaches the reference voltage at drive operation of the motor 4, and also discharges the charge voltage of the charge circuit 5 through the drive coil of the relay 7, thereby eliminating the influence of the bounce included in the charge output. COPYRIGHT: (C)2004,JPO