Investigation of a Novel 24-Slot/14-Pole Six-Phase Fault-Tolerant Modular Permanent-Magnet In-Wheel Motor for Electric Vehicles

Abstract

Abstract:In this paper, a six-phase fault-tolerant modular permanent magnet synchronous machine (PMSM) with a novel 24-slot/14-pole combination is proposed as a high-performance actuator for wheel-driving electric vehicle (EV) applications. Feasible slot/pole combinations of the fractional-slot concentrated winding six-phase PMSM are elicited and analyzed for scheme selection. The novel 24-slot/14-pole combination is derived from the analysis and suppression of the magnetomotive force (MMF) harmonics. By making use of alternate-teeth-wound concentrated winding configuration, two adjacent coils per phase and unequal teeth widths, the phase windings of the proposed machine is magnetically, thermally isolated, which offers potentials of modular design and fault tolerant capability. Taking advantage of the leakage component of winding inductance, 1.0 per unit short-circuit current is achieved endowing the machine with short-circuit proof capability. Optimal design of essential parameters aiming at low eddy current losses, high winding factor and short-circuit-proof ability are presented to pave the way for a high-quality system implementation.

Analytical Calculation of D- and Q-axis Inductance for Interior Permanent Magnet Motors Based on Winding Function Theory

“…In recent decades, permanent magnet (PM) motors cover a wide range of industrial applications, especially for electric vehicles (EVs), attributing to the compact structure, high efficiency, high power/torque density and excellent dynamic performances [1][2][3][4][5][6]. As a typical topology of PM motors, the interior permanent magnet (IPM) motors with a V-shape provide a more superior performance of the flux-weakening capability and wider constant-power speed range [7][8][9][10], achieving considerable attention.…”

Influence of Stator MMF Harmonics on the Utilization of Reluctance Torque in Six-Phase PMA-SynRM with FSCW

“…The symmetric six-phase windings with a 60-degree phase belt have electromagnetic features similar to a conventional 60-degree three-phase winding [33], as shown in Table 1. The symmetric six-phase windings (Winding II and Winding IV) possess the same winding factors and MMF distributions as the three-phase windings (Winding I and Winding III).…”

Analysis of Vibrations in Interior Permanent Magnet Synchronous Motors Considering Air-Gap Deformation

“…Interior permanent magnet synchronous motors (IPMSMs) have been widely applied in electrical vehicle systems due to the advantages of high power density, high torque density, high efficiency, low torque ripple, and so on [1][2][3][4][5][6]. The vibration in the permanent magnet synchronous motor (PMSM) has been a significant topic for the last couple of decades [7][8][9].…”