Brushless motor drive circuit including a linear amplifier for s

Details Brushless motor drive circuit including a linear amplifier for s Brushless motor drive circuit including a linear amplifier for s

1996-07-24

1998-10-06

Martin, David S.

Electricity: motive power systems

Switched reluctance motor commutation control

318439, 388910, 3889281, H02P 700

Patent

active

058181792

ABSTRACT:
In a d.c. brushless motor drive circuit, the output amplifier produces a motor winding drive current with dulled rise/fall edges from a detected sinusoidal back e.m.f. voltage induced on the winding during the steady-state operation when the motor runs at the rated speed. The output amplifier includes a set of transistors each brought to a saturated conductive state or a cutoff state in accordance with the phase conduction sequence to connect one end of each motor winding to a ground voltage source, and another transistor operated continuously to connect the neutral point, which is opposite ends of the motor windings connected together, to a power voltage source.

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"Sensorless Drive for Brushless D.C. Motor", Toshiba Review, vol. 45, No. 9, pp. 755-758, published BY Toshiba Corp., 1990 (with English translation).

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