Patent Number: 6,803,739

Title: Method and apparatus for controlling synchronous motor

Abstract: A method and apparatus of controlling a synchronous motor having a rotor, and a stator which produces a magnetic flux for rotating the rotor about an axis thereof, the method including the steps of detecting an angular position and a rotating speed of the rotor; estimating a phase difference between a voltage and an electric current of the synchronous motor, on the basis of the detected rotating speed of the rotor; and adjusting an advance angle of the rotor upon excitation of the synchronous motor, as a result of comparison of the detected rotating speed of the rotor with a target value, to thereby control the rotating speed and direction of the rotor.

Inventors: Miyata; Hideki (Okazaki, JP), Hoshino; Akira (Nishikamo-gun, JP), Tomomatsu; Hideo (Nagoya, JP), Hori; Masashi (Nukata-gun, JP), Yamazaki; Hiromichi (Hazu-gun, JP), Tanaka; Hitoshi (Nagoya, JP)

Assignee: Toyota Jidosha Kabushiki Kaisha

International Classification: H02P 25/02 (20060101); H02P 6/08 (20060101); H02P 25/08 (20060101); H02P 6/00 (20060101); H02P 6/06 (20060101); H02P 001/46 (); H02P 003/18 (); H02P 005/28 (); H02P 007/36 (); H02P 007/04 ()

Expiration Date: 10/12/2021