Reduced ripple drive circuit for a brushless motor

Details Reduced ripple drive circuit for a brushless motor Reduced ripple drive circuit for a brushless motor

1984-10-26

1987-04-14

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, H02P 602

Patent

active

046581901

ABSTRACT:
A drive circuit for a three-phase brushless motor in which two Hall detectors are spaced 120.degree. apart in electrical angle near the rotors to detect magnetic flux signals for two phases. Their outputs are summed and inverted to form the third phase signal. The three phase signals drive the respective coils on the stator. The three phase signals are also separately squared and then added to adjust, in a feedback fashion, the current through the Hall detectors, whereby torque ripple is reduced.

REFERENCES:
patent: 4354145 (1982-10-01), Janssen

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