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DC brushless motor rotor angle detection method and DC brushless motor control device
DC brushless motor rotor angle detection method and DC brushless motor control device
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机译：直流无刷电动机转子角度检测方法及直流无刷电动机控制装置
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摘要
A method and an apparatus accurately detect a rotor angle of a DC brushless motor by using a first-order difference of a detected value of a phase current. A periodic signal causing the total sum of output voltages in three control cycles to become zero is superposed over a drive voltage under current feedback control. The drive voltage is held at a constant level during the three control cycles. The phase difference between an actual value and an estimated value of a rotor angle is calculated, using the first-order differential current in each control cycle, and the estimated value of the rotor angle is calculated by follow-up computation of an observer, using the phase difference.
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