Design Considerations for Coreless Linear Actuators

Linear permanent magnet synchronous motors are often used in applications where a high accuracy is needed. This paper investigates the influence of the key design parameters on the performance of a linear actuator with vertically magnetized magnets and a magnet array with quasi-Halbach magnetization. The performance is modeled by means of analytical expressions of the three-dimensional magnetic field components and optimal design ratios and guidelines are established.