This technology relates to an actuator motor with fast dynamic response capability, high torque density, high efficiency, and improved thermal and mechanical stability at high speed while minimizing weight. According to one example, an actuator motor includes a rotor shaft with an array of permanent magnets attached according to a Halbach array configuration. A stator includes windings that induce a torque on the rotor shaft when rotating magnetic fields interact with the optimized magnetic flux distributions of the magnets of the Halbach array.

This invention is directed to a method to improve the performance of stepper motor driven systems.Stepper motors are ubiquitous in modern office equipment and other machinery, yet little is published regarding their optimal use in open loop systems.Accurate control of a stepper motor is limited by the ability of the control system to approximate the actual motor and subsequently provide the correct instructions for achieving the actual desired movement with little or no error.Moving the motor to a specific position within a specified time period is difficult due to variations between motors