Power supply circuit for a motor

Details Power supply circuit for a motor Power supply circuit for a motor

1991-11-18

1993-07-06

Ro, Bentsu

Electricity: motive power systems

Limitation of motor load, current, torque or force

388903, 361 31, H02J 104, G05F 110

Patent

active

052257517

ABSTRACT:
In a power supply circuit for a motor in which a power source line can be opened and closed by a first opening-closing device, a construction is adopted which has a electrically controllable second opening-closing device connected in parallel to the first opening-closing device, a comparator for comparing the voltage of the motor load side with a predetermined value, a controller for controlling the opening and closing of the second opening-closing device on the basis of a signal from the comparator, and a current limiter device provided in parallel to the second opening-closing device, whereby a rush current when the first opening-closing device is closed can be suppressed to thereby prevent the fluctuation of the source voltage and the deterioration of the contacts of the first opening-closing device.

REFERENCES:
patent: 4814687 (1989-03-01), Walker
patent: 4819117 (1989-04-01), Brennan et al.
patent: 5117167 (1992-05-01), Kazmirski

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