About Commutation and Current Control Methods for Brushless Motors
نویسندگان
چکیده
For brushless motor drives, current control is often used to improve performance and reliability. This tutorial paper analyzes and compares various different schemes of electronic commutation and current control. Starting from a simple 6-step drive without current control, discussion will include bus current control, sinusoidal commutation, phase current control, and synchronous regulator. Relative advantages of various commutation techniques and current control schemes with respect to dynamic performance and steady-state torque output are discussed. Practically used current sensors, topologies, circuit design and digital control implementation are also presented.
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