Feedback control system for producing pulse width modulation con

Details Feedback control system for producing pulse width modulation con Feedback control system for producing pulse width modulation con

1987-07-20

1988-09-20

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

318341, 364768, G05B 1128

Patent

active

047728337

ABSTRACT:
In a feedback control system for providing a pulse width modulated control signal for feedback controlling a motor or other device in accordance with control error data, control data produced according to the control error data and previously stored rounding error data are added together, and the sum of the control data and rounding error data is in turn rounded off, while the rounding error data is stored in a register, memory, or the like. The pulse width modulated control signal is then produced according to the rounded-off data.

REFERENCES:
patent: 4179670 (1979-12-01), Kingsbury
patent: 4383245 (1983-05-01), Cooley et al.
patent: 4586005 (1986-04-01), Crawford
"The Digiphase Synthesizer" by Garry Gillette, paper presented at the 23rd Annual Frequency Control Symposium, 1969.

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