Permanent magnet assembly for electric machines and actuators, method for their design and electric machines and actuators

摘要

The invention relates to modular permanent magnet poles and to electric machines and actuators for use as electric drive systems incorporating them for shaping machine flux density distribution produced by permanent magnet poles to obtain smooth operation of electric machines and actuators. The proposed modular poles consist of three or more permanent magnet modules with specific dimensions and magnetizations. They provide almost any flux density distribution shape e.g. sinusoidal and trapezoidal shapes. The limited number of rectangular modules with the same heights and uniform magnetizations reduce the production cost of the machines and actuators.