Title:
ANTIBACKLASH DRIVING DEVICE FOR ROTATING BODY
Document Type and Number:
Japanese Patent JPS581204
Kind Code:
A
Abstract:
PURPOSE:To simplify the circuit and to improve the reliability of failure detection, by obtaining current difference flowing to the 1st and 2nd motor and deenergizing both the motors when the difference is greater than a reference value. CONSTITUTION:Currents IM1 and IM2 flowing to motors 4 and 5 are inputted to an adder 23, the difference is outputted and compared with a reference value (c) at a comparator 24. When a driving circuit 1 is normal, the difference of torque of the motors 4 and 5 is 2Tp, the output of the comparator 24 is turned off, and a relay 20 is inoperative. When the torque difference is 2Tp or more, the output of the comparator 24 turns on a switching transistor 19, a relay 20 is operated , its contacts 20a and 20b are opened and the motors 4 and 5 are turned off. Thus, a failure detection circuit 21 detects a failure of the circuit 1, and if an excessive load is applied to a gear of the circuit 1, the motors 4 and 5 are turned off to prevent the damage. Thus, a complicated simulated load circuit is unnecessary, the circuitry is made simpler and the reliability can be improved.
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| JPH0863405 | CONTROLLER |
| JPS63317801 | SWITCH SYSTEM FOR CONTROLLING SET VALUE |
Inventors:
KIMURA TAKASHI
Application Number:
JP10028481A
Publication Date:
January 06, 1983
Filing Date:
June 25, 1981
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G05B9/02; F16H57/12; G05B23/02; (IPC1-7): F16H57/12; G05B9/02
Domestic Patent References:
| JPS4710718A | 1972-05-29 |
Attorney, Agent or Firm:
Masuo Oiwa
Next Patent: JPS581205