首页>
外国专利>
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
展开▼
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
展开▼
页面导航
摘要
著录项
相似文献
摘要
PPROBLEM TO BE SOLVED: To provide a rotor angle estimating method of a DC brushless motor for inhibiting an estimation error from increasing in 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 phase difference estimate value SBE2/SBcorresponding to a phase difference SBe/SBbetween an estimate value and an actual value of the rotor angle is calculated (STEP35). An estimate value ^ of an angular speed is updated by using the phase difference SBE1/SBand an angular acceleration estimate value ASB/SB, and an estimate value ^ of the rotor angle is updated by using the phase difference SBE1/SBand the estimate value ^ of the angular speed (STEP40). PCOPYRIGHT: (C)2007,JPO&INPIT
展开▼
