Improved commutation position detection system and method

摘要

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.