Design and control of high-speed solid-rotor synchronous reluctance drive with three-phase LC filter

Synchronous reluctance machines with solid rotor construction have advantages in certain high-speed applications such as flywheel energy storage systems. However, the solid rotor allows the flow of eddy currents, resulting in heat generation. A three-phase LC filter can reduce rotor losses due to the switching harmonics generated by a 3-phase inverter. This paper investigates the design and control of a high-speed synchronous reluctance drive with a three-phase LC filter. A two-phase dynamic model of the drive which incorporates the LC filter dynamics is presented. This model is used to predict rotor losses due to switching harmonics using phasor analysis. A feedforward-based current regulator is utilized, which is modified to include the effects of the LC filter. Simulation and experimental results validate the proposed approach.