Six-phase supply feasibility using a PM fractional-slot dual winding machine

Abstract

The growing interest on fault tolerant drives requires new solutions avoiding the adoption of custom and expensive configurations. The machine with a dual three-phase winding is an interesting candidate. It is provided of two windings, each of them fed by one converter of half power. In the event of fault, one of the two three-phase windings (the faulty one) is disconnected and the machine is operated by means of the healthy winding only. With a proper mechanical and electrical arrangement the machine can be exactly a six-phase machine, obtaining higher performance during healthy conditions. The paper analyzes the feasibility of this dual winding configuration applied to a non-overlapped coils fractional-slot winding permanent magnet (PM) machine. The star of slots is applied to highlight the proper winding candidates. The more interesting windings are deeply analyzed

Torque Improvement of Dual Three-Phase Permanent-Magnet Machine With Third-Harmonic Current Injection

“…B 1 , B 3 Fundamental and 3rd harmonic components of excitation flux density. E 1 , E 3 Amplitude of fundamental and 3rd harmonic back-EMFs. e a , e b , e c Instantaneous three phase back-EMFs.…”

“…e a , e b , e c Instantaneous three phase back-EMFs. I 1 , I 3 Amplitude of fundamental and 3rd harmonic current. I a Current amplitude varied with a. i a , i b , i c Instantaneous three phase currents.…”

A Novel Dual Three-Phase Permanent Magnet Synchronous Motor With Asymmetric Stator Winding

“…Thus, it helps to reduce the thermal stresses on power devices and provides the employment of smaller converters. Most importantly, reliability and redundancy are the key features for multi-phase machines with multiples of three so that the machine can continue to operate even with one or more un-healthy stator winding sets [1]. These features make fault tolerant multiphase PM motors become more attractive for safety-critical applications such as space, traction, military and etc.…”

Effects of Imperfect Manufacturing Process on Electromagnetic Performances and Online Inter-turn Fault Detection in PMSMs

“…As reliability is critical for transportation applications, these PM topologies can also be compliant for dual channel windings and fault tolerant modes. In these two cases, several studies have shown that some PMSM designs are appropriate [6], [10], [11]. Another aspect concerns the manufacturing process of PMSM having FSCW.…”