Commutation position detection system and method

Details Commutation position detection system and method Commutation position detection system and method

1997-02-03

1998-10-13

Ip, Paul

Electricity: motive power systems

Limitation of motor load, current, torque or force

318254, 318138, H02P 602

Patent

active

058217134

ABSTRACT:
An improved commutation position detection system for accurately determining commutation position within polyphase brushless motors without employing proximity sensors or transducers. The present invention determines commutation position. by differentiating the current flowing within the stator coils and comparing the differentiated current waveforms to one another (absolute commutation position detection) or a predetermined threshold (incremental commutation position detection) to obtain a real-time assessment of commutation position.

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