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ROTOR POSITION ESTIMATION APPARATUS, MOTOR CONTROL SYSTEM AND ROTOR POSITION ESTIMATION METHOD
ROTOR POSITION ESTIMATION APPARATUS, MOTOR CONTROL SYSTEM AND ROTOR POSITION ESTIMATION METHOD
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机译：转子位置估计装置，电机控制系统和转子位置估计方法
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摘要
PROBLEM TO BE SOLVED: To estimate the rotor position accurately without being affected by errors of a current detector for detecting a current flowing to a motor, in a rotor position estimation apparatus for estimating the rotor position of a motor including a rotor having a salient pole.SOLUTION: A rotor position estimation unit 270 estimates the rotor position of an AC motor M1, including a rotor having a salient pole, during stoppage. The rotor position estimation unit 270 applies a d-axis voltage to the AC motor M1 during stoppage thereof, and detects a q-axis current flowing to the AC motor M1 when the d-axis voltage is applied. Based on the q-axis current thus detected, the rotor position of an AC motor M1 during stoppage is estimated. The rotor position estimation unit 270 sets a d-axis voltage application time corresponding to a moment in time when the q-axis current has a peak, in the transient response characteristics of the q-axis current when the d-axis voltage is applied.
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