PERMANENT MAGNET MOTOR

A permanent magnet motor is obtained in which an electromagnetic excitation force of a low spatial order is reduced, and influence of a magnetomotive force harmonic of a rotor is reduced so that torque ripple is reduced. In a permanent magnet motor 10, one set of armature windings 30-1 is supplied w...

Full description

Saved in:
Bibliographic Details
Main Authors AKUTSU SATORU, ASAO YOSHIHITO, NAKANO MASATSUGU, TAKIGUCHI RYUICHI, HIROTANI YU, TAKIZAWA YUJI
Format Patent
LanguageEnglish
French
German
Published 08.06.2016
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
Online AccessGet full text

Cover

More Information
Summary:A permanent magnet motor is obtained in which an electromagnetic excitation force of a low spatial order is reduced, and influence of a magnetomotive force harmonic of a rotor is reduced so that torque ripple is reduced. In a permanent magnet motor 10, one set of armature windings 30-1 is supplied with current from a first inverter, and the other set of armature windings 30-2 is supplied with current from a second inverter. In the case where a pole number of a rotor 11 is M and the number of slots 25 of a stator iron core 22 is Q, M and Q satisfy a relationship of M < Q and a greatest common divisor of M and Q is equal to or greater than 3. In the rotor 11, a rotor iron core 12 is located on a stator 21 side beyond a radius intermediate between the maximum outer radius and the minimum inner radius of permanent magnets 13. A phase difference between three-phase currents supplied from the first inverter and three-phase currents supplied from the second inverter is controlled to fall within a range of electrical angles of 20 to 40 degrees.
Bibliography:Application Number: EP20110878174