公开(公告)号：US20240146222A1

公开(公告)日：2024-05-02

申请号：US18279088

申请日：2021-08-31

申请人： Hitachi Astemo, Ltd.

发明人： Hiroaki SATO ,  Hirokazu MATSUI ,  Toshisada MITSUI ,  Kohei MYOEN

IPC分类号： H02P21/18 ,  H02P21/22

CPC分类号： H02P21/18 ,  H02P21/22 ,  H02P2207/05

摘要： A drive apparatus of a synchronous motor includes: a current detecting unit that detects a phase current flowing to the synchronous motor; and a magnetic pole position estimating unit that estimates a magnetic pole position of a rotor of the synchronous motor, based on the phase current detected by the current detecting unit. The magnetic pole position estimating unit includes a first peak-to-peak detector that detects a first peak-to-peak value representing a difference between a maximum value and a minimum value of the phase current, a quadrature component detector that detects a quadrature component of the phase current, and a second peak-to-peak detector that detects a second peak-to-peak value representing a difference between a maximum value and a minimum value of the quadrature component. The magnetic pole position estimating unit calculates a first magnetic pole position, based on the first and second peak-to-peak values while the synchronous motor is stopped, and estimates an initial magnetic pole position of the rotor, based on the first magnetic pole position.