永久磁石DCモーター

The magnetic field for a synchronous machine may be provided by using long lasting magnets made of neodymium-boron-iron, samarium-cobalt, or ferrite on the rotor. In some motors, these magnets are mounted with adhesive on the surface of the rotor core such that the magnetic field is radially directed across the atmosphere gap. In other designs, the magnets are inset into the rotor core surface area or inserted in slot machine games just below the surface. Another kind of Auto Chain permanent-magnet electric motor has circumferentially directed magnets positioned in radial slots that provide magnetic flux to iron poles, which create a radial field in the air flow gap.

The main application for permanent-magnet motors is in variable-speed drives where the stator is supplied from a variable-frequency, variable-voltage, electronically controlled source. Such drives are capable of precise speed and placement control. Because of the lack of power losses in the rotor, in comparison with induction electric motor drives, also, they are highly efficient.

永久磁石モータは、連続的な電圧と周波数を得る方法によって、同期回転速度で動作するように設計できます。磁石は回転子鉄心に埋め込まれており、始動能力を確保するために、回転子表面のスロットにダンパー巻線が配置されています。ただし、このようなモータには、固定子電力を制御する手段はありません。