Drive device for motor

Details Drive device for motor Drive device for motor

1990-10-24

1991-10-22

Gellner, Michael L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307571, 388907, 3542711, G03B 310, G03B 902, H03K 17687

Patent

active

050599925

ABSTRACT:
In a motor control device, an electric circuit responsive to a mode selection signal for determining whether or not an electric motor is driven is constructed with two field-effect transistors. A source terminal of the first field-effect transistor is connected to one of terminals of the motor, and a source terminal of the second field-effect transistor is connected to the other terminal of the motor. The mode selection signal is applied to the gate terminal of each of the two field-effect transistors. The drain terminal of the first field-effect transistor is connected to the output of a circuit for generating a drive signal for driving the motor, and the drain terminal of the second field-effect transistor is grounded. The accuracy of control is not lowered as the number of cycles of changing operation over between the manual and motor-driven modes increases, and the electric power is less consumed in each cycle over.

REFERENCES:
patent: Re32526 (1987-10-01), Hochstein
patent: 3412266 (1968-11-01), Tarico

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