| 发明名称 | Permanent magnet motor | ||
| 摘要 | A permanent magnet motor in which electromagnetic excitation force of low spatial order is reduced, and influence of a magnetomotive force harmonic of a rotor and torque ripple is reduced. One set of armature windings receives current from a first inverter, and another set of armature windings receives current from a second inverter. Where a pole number of a rotor is M and the number of slots of a stator core is Q, M and Q satisfy M<Q and a greatest common divisor of M and Q is equal to or greater than 3. In the rotor, the iron core is located beyond a radius intermediate the maximum outer radius and the minimum inner radius of the permanent magnets. A phase difference between three-phase currents from the first and second inverters is in a range of electrical angles of 20 to 40 degrees. | ||
| 申请公布号 | US9627936(B2) | 申请公布日期 | 2017.04.18 |
| 申请号 | US201114239968 | 申请日期 | 2011.12.23 |
| 申请人 | Mitsubishi Electric Corporation | 发明人 | Nakano Masatsugu;Asao Yoshihito;Akutsu Satoru;Takiguchi Ryuichi;Takizawa Yuji;Hirotani Yu |
| 分类号 | H02K21/12;H02K3/28;H02K1/27;H02K3/12;H02K11/225;H02K29/08;H02K29/12;H02K1/24 | 主分类号 | H02K21/12 |
| 代理机构 | Sughrue Mion, PLLC | 代理人 | Sughrue Mion, PLLC ;Turner Richard C. |
| 主权项 | 1. A permanent magnet motor comprising: a rotor including a rotor iron core and a plurality of permanent magnets provided in the rotor iron core; and a stator including a stator iron core and two sets of three-phase armature windings provided in a plurality of slots formed in the stator iron core, wherein one set of the armature windings is supplied with current from a first inverter, and the other set of the armature windings is supplied with current from a second inverter, in the case where a pole number of the rotor is M and a slot number of the stator iron core 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, the rotor iron core is located on the stator side beyond a radius intermediate between the maximum outer radius and the minimum inner radius of the permanent magnets, 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 electric angles of 20 to 40 degrees, a M number of the permanent magnets are arranged along the circumferential direction of the rotor, where M is the pole number of the rotor, and are provided at a surface of the rotor iron core, and a protruding portion made of magnetic material is present between the adjacent permanent magnets of the rotor, and an outer side of the protruding portion in a radial direction protrudes toward the stator side beyond a radius intermediate between the maximum outer radius and the minimum inner radius of the permanent magnets. | ||
| 地址 | Tokyo JP | ||