Torque harmonic compensation in a synchronous reluctance motor

Abstract

The torque behavior of a synchronous reluctance machine (including the PM assisted configuration) is studied analytically, to the aim of individuating the position of the flux-barrier ends that minimizes the torque ripple. A new strategy is proposed based on a suitable choice of these positions together with the combinations of rotor laminations of different type. This allows the torque harmonics to be compensated and a smooth torque to be achieve

Electromagnetic and Thermal Analysis of Permanent Magnet Machines

“…Fig. 18(b) shows the "Machaon" 4 rotor, proposed to reduce the torque ripple in IPM machines (Bianchi et al, 2008; . It is formed by laminations with flux-barriers of different geometry, large and small alternatively under the adjacent poles.…”

Controller Design for Synchronous Reluctance Motor Drive Systems with Direct Torque Control

“…For example, Gao and Chau present the occurrence of Hopf bifurcation and chaos in practical synchronous reluctance motor drive systems [25]. Bianchi, Bolognani, Bon, and Pre propose a torque harmonic compensation method for a synchronous reluctance motor [26]. Iqbal analyzes dynamic performance of a vector-controlled five-phase synchronous reluctance motor drive by using an experimental investigation [27].…”

Fast Design of Asymmetrical Permanent Magnet Synchronous Machines That Minimize Pulsating Torque

“…Some examples of controlled-asymmetries are: stator teeth pairing [6], slot opening shift [8], nonuniform teeth [14], tangential shift of magnets [1,2,4,15,16], different magnet widths [13] and uneven placement of flux barriers in PM assisted synchronous reluctance motors [3].…”