Single-winding double-speed permanent magnet motor for electric vehicle

• Main Authors: LUO SHOUYUAN, YANG WENBO, ZHANG YANG
• Format: Patent
• Language: Chinese; English
• Published: 22.08.2017
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

The invention belongs to permanent magnet synchronous motors and brushless direct current motors, and specifically relates to a single-winding double-speed permanent magnet motor for an electric vehicle. Star and corner connection switching of the winding phase line connection mode is performed by employing a star and corner connection change-over switch, position signals of a star-connection winding and position signals of a corner-connection winding can also be switched, a rotor magnetic circuit structure employs built-in magnetic steel, air gaps formed by outer rim lines of magnetic pole shoes and stator teeth employ ideal sine wave air gaps, more than 3 times of odd harmonics in the winding phase electromotive force are eliminated, and double speeds can be realized with a single winding through star and corner connection switching of the connecting mode. According to the scheme, the average operation efficiency of the motor is greatly improved, the problem of requirement of large torsion during overloadin