Reset control of synchronous motors with permanent magnet excitation

This paper investigates the application of reset control to the vectorial control of brushless AC drives. A reset compensator is a standard linear compensator that, at some instants, resets to zero its internal states (or part of the states). The reset instants are triggered by the event of zero crossing of the tracking error. It has been proven in many other applications (process control, teleoperation, etc.) that reset control is able to overcome linear limitations, that is, achieves time responses with good speed and damping properties, combined in a way that no other linear compensator is able to produce. We investigate the addition of a reset integrator (Clegg integrator CI) to a P and a PI used as velocity compensator. We have found by simulations that the PI+CI has superior performance and gives a better solution to the tradeoff of speed and damping. The validation has been done with a realistic simulation of the motor (MCK240 Kit) that includes full details of the system (current transformations, saturations, DSP finite wordlength, etc.).