Improving the Specific Mass and Dimensions of Synchronous Reluctance Electric Drives

Abstract

An analysis of independent control actions in different control structures is performed to compare different methods for improving the specific mass and dimensions of electric drives for objects that carry out point-to-point motion or tracking motion. Algorithms for optimizing the form of phase (control) currents are formulated. The physical modeling method has shown that a rectangular oscillogram of the phase current in a series excitation circuit is most convenient for use in overload zones. It is shown that improved mass and dimensions in the low-power range can be achieved in synchronous reluctance electric drives having a complex rotor design (compound design with nonmagnetically conductive inserts). A multiphase circuit with individual sources in each phase is an appropriate circuit for use in high-power electric drives (more than 500 kW). Improved acceleration performance is achieved without complicating the design of the rotor due to the failure of sinusoidal control laws. In this case, the parameters of the electric drive under consideration are comparable with the parameters of a synchronous reluctance electric drive having a compound (complex) rotor. The form of the phase current is rectangular at the initial stage of adjustment, and the ratio between the excitation current and the armature current is determined depending on the saturation coefficient of the magnetic system.