Inverse electromotive force eliminating device for motor utilizi

Details Inverse electromotive force eliminating device for motor utilizi Inverse electromotive force eliminating device for motor utilizi

1991-08-23

1992-08-11

Ro, Bentsu

Electricity: motive power systems

Armature circuit control

By shunting armature or primary winding

318368, 318459, H02P 306

Patent

active

051382423

ABSTRACT:
This invention relates to an inverse electromotive force eliminating device which protects a motor controller of a motor utilizing a MOS-FET by effectively eliminating the inverse electromotive force generated in a process for accelerating and decelerating a mobile device by utilizing an alternating current servo motor operated by applying the power supply of an inverter. A voltage, generated by an inverse electromotive force upon accelerating and decelerating of a motor in a state when the direct current required for circuit operation is supplied by power supply, increases at an input of an inverter. The voltage is detected by an inverse electromotive force detector and thereafter it is applied to an inverse electromotive force eliminator by utilizing a MOS-FET base driver so that the inverse electromotive force of motor is eliminated. Simultaneously, first and second indicators indicate whether the power supply is inputted and whether the inverse electromotive force is generated.

REFERENCES:
patent: 3671837 (1972-06-01), Kanno
patent: 3795850 (1974-03-01), Grygera
patent: 3839661 (1974-10-01), Wada
patent: 4278921 (1981-07-01), Medding et al.
patent: 4426606 (1984-01-01), Suita et al.

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