Pulse width modulator motor control

Details Pulse width modulator motor control Pulse width modulator motor control

1988-03-31

1990-03-20

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

388819, 388903, H02P 104, H02J 102

Patent

active

049104470

ABSTRACT:
A pulse width modulation control circuit includes a pulse width modulator which supplies a signal to a power switch tying together a d.c. signal generator and a motor and various sensing circuit including a control voltage disabler circuit, a motor voltage and current feedback circuit, and a low control voltage disabler circuit. All of the sensing circuits are appropriately designed to ensure that the various components of the circuit are not damaged under abnormal conditions whether due to motor loads heavier than rated or undesired changes in a.c. current input or control voltages.

REFERENCES:
patent: 3213343 (1965-10-01), Sheheen
patent: 3716767 (1973-02-01), Kuriyama et al.
patent: 4032825 (1977-06-01), Kiimo
patent: 4150324 (1979-04-01), Naito
patent: 4635927 (1987-01-01), Shu
patent: 4673851 (1987-06-01), Disser
patent: 4705997 (1987-11-01), Juzswik

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