Variable duty cycle pulse width modulated motor control system

Details Variable duty cycle pulse width modulated motor control system Variable duty cycle pulse width modulated motor control system

1990-10-29

1991-05-21

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318599, 388811, 388819, H02P 534

Patent

active

050178547

ABSTRACT:
A control system for controlling a direct current powered motor in which the direct current voltage, which may not be constant, is reversibly commutated across the coil or winding of the motor during the predetermined commutation time intervals and chopped at high frequency during each commutation time interval by a variable duty cycle, pulse width modulated voltage, in which the width of each voltage pulse, determined by a reference voltage, is varied as an inverse function of the magnitude of the direct current voltage which exists during each voltage pulse interval.

REFERENCES:
patent: 4409535 (1983-10-01), Hickman
patent: 4638225 (1987-01-01), Morinaga et al.
patent: 4656402 (1987-04-01), Nishikawa
patent: 4972133 (1990-11-01), Hirota et al.

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