Motor drive system controlled by a phase accumulator and method

Details Motor drive system controlled by a phase accumulator and method Motor drive system controlled by a phase accumulator and method

1997-05-29

1999-12-21

Martin, David

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

388 91, H02P 5165

Patent

active

060060085

ABSTRACT:
A high resolution speed control for a DC or BLDC phase-locked-loop (PLL) motor is provided. A phase accumulator sends a time varying frequency reference to the PLL input, where the average frequency sets the motor speed with a high degree of accuracy. A post divider is used to reduce the number of circuits required to implement the function.

REFERENCES:
patent: 4103281 (1978-07-01), Strom et al.
patent: 4271382 (1981-06-01), Maeda et al.
patent: 4989073 (1991-01-01), Wagner
patent: 4996699 (1991-02-01), Rudolph
patent: 5488627 (1996-01-01), Hardin et al.
IEEE Journal of Solid State Circuits, "A High Speed Direct Frequency Synthesizer, "Feb. 1980.
IEE Proceedings-G, "Single Chip 500MHz Function Generator," Feb. 1991.

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