D.C. motor control circuit for radio controlled toy

Details D.C. motor control circuit for radio controlled toy D.C. motor control circuit for radio controlled toy

1989-12-13

1991-11-12

Shoop, Jr., William M.

Electricity: motive power systems

Supplied or controlled by space-transmitted electromagnetic...

388829, 34082563, H02P 700

Patent

active

050650785

ABSTRACT:
A control circuit for a DC motor which drives a radio controlled toy. The control circuit receives a signal whose pulse width contains information relating to the desired speed and direction in which the motor is to turn. If the pulse width is greater than a predetermined value, the control signal will be generated which causes the motor to turn in a forward direction, and if the pulse width is less than the predetermined value a control signal will be generated which causes the motor to turn in a reverse direction. The pulse width is also converted to a voltage level which is compared to a ramp wave with a frequency which is higher than the frequency of the received signal. The output of the comparator is a signal with a frequency which is higher than that of the received signal, allowing precise control of the motor in overcoming inertial forces applied against it.

REFERENCES:
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patent: 4295082 (1981-10-01), Moto et al.
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patent: 4334221 (1982-06-01), Rosenhagen et al.
patent: 4360808 (1982-11-01), Smith, III et al.
patent: 4424470 (1984-01-01), Finch

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