Inductive load drive circuit for eliminating back electromotive

Details Inductive load drive circuit for eliminating back electromotive Inductive load drive circuit for eliminating back electromotive

1994-03-03

1996-06-18

Ro, Bentsu

Electricity: motive power systems

Braking

Dynamic braking

318261, 318368, 3889281, H02P 312

Patent

active

055281150

ABSTRACT:
An inductive load drive circuit for driving an inductive load, such as a motor, and for preventing charging of a power source by the back electromotive force of an inductive load. The inductive load drive circuit uses a battery as the power source for supplying power to the load. A first switching mechanism can serially connect and disconnect the inductive load and the battery. The first switching mechanism is controlled so that it disconnects the inductive load from the battery when the inductive load is in a condition in which the inductive load is able to generate back electromotive force or when the inductive load will be shifted to such a condition. Moreover, a bypass circuit can be used to consume the energy of the back electromotive force of the inductive load. A second switching mechanism is serially connected to the bypass circuit, with the serial combination of the second switching mechanism and the bypass circuit being in parallel with the power source. The first switching mechanism and the second switching mechanism are controlled so that they are in opposite switching conditions.

REFERENCES:
patent: 2965827 (1960-12-01), Hohne, Jr.
patent: 3379949 (1968-04-01), Todd
patent: 3732475 (1973-05-01), Geerling
patent: 3919611 (1975-11-01), Takahashi et al.
patent: 5059992 (1991-10-01), Akiike
patent: 5138242 (1992-08-01), Kim et al.

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