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DC brushless motor rotor angle estimation method and DC brushless motor control device
DC brushless motor rotor angle estimation method and DC brushless motor control device
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机译：直流无刷电动机转子角估计方法和直流无刷电动机控制装置
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摘要
PPROBLEM TO BE SOLVED: To provide a rotor angle estimating method of a DC brushless motor for suppressing a fluctuation in a level of a phase difference estimate value corresponding to a phase difference between an estimate value and an actual value of a rotor angle and accurately estimating the rotor angle, and a controller of the DC brushless motor. PSOLUTION: Periodic signals VhSBd/SB, VhSBq/SBwherein the sum of output voltages becomes zero in three control cycles are superimposed on drive voltages VfbSBd/SB, VfbSBq/SBdue to a current feedback control. The constant drive voltage Vfb is maintained in three control cycles. A sine reference value VsSBdq/SB, a cosine reference value VcSBdq/SBand an inductance reference value L0 are calculated by using first differential currents (dI(0), dI(1), dI(2)) in each control cycle (STEP34). A normalization processing is implemented so as to divide the sine reference value VsSBdq/SBby the inductance reference value L0, and a phase difference reference value SBE1/SBcorresponding to the phase difference SBe/SBbetween the estimate value and the actual value of the rotor angle is calculated (STEP35). The estimate value ^ of the rotor angle is updated by using the phase difference SBE1/SB(STEP40). PCOPYRIGHT: (C)2007,JPO&INPIT
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