High performance synchronous reluctance motor with multi-flux barrier for the appliance industry

Abstract

There was once little hope of improvingpe~ormance in a reluctance motor because of the considerably low efficiency and low power output. However, this has changed in recent years because of advances in power electronics and machining; reluctance motors have now become the focus of new studies. Research and development is pursuing two different tracks. One targets what is referred to as a switched reluctance motor which uses a pulse signal to drive a salient-pole rotor.The other targets a synchronous reluctance motor (SynRM) which uses a sinusoidal wave ro drive a rotor which is constructed with severalflux barriers. The stator winding of this latter is of the same specifications as that used in an induction motor or a brushless motor which utilizespermanent magnets. It also carries the merit of effectively utilizing a conventional inverter owing to the sinusoidal wave drive. For what regards rotor construction of this type of motor, Lipo, Miller, Boldea, Vagati and others have enthusiastically researched an axially laminated construction which features layers of electromagnetic iron plate in the rotor 3 m-al direction for the purpose of improvingsaliency ratio. However, many of these have not clanfiedthe relationship between flux barder construction and motor enciency. This paper reports on simulations and experiments using aprofotype, in which flux barrier construction and design optimization were investigated in consideration of machining distortion and otherfadors, aspart of studies into making a highly efficient multi-flux barrier SynRM. It is also reportedthat the prototype modelproved to be 6% more efficient than an induction motor with the same inverter drive.0-7803-4943 -1/98/$10.00 0 1998 IEEE

Rotor optimization for synchronous reluctance motors

“…On the other hand, the TLA rotor is produced by processing air barriers on silicon steel plates and stacking those pieces through the shaft. It has slightly weaker performance than the ALA rotor, but much simpler manufacture process and stronger mechanical strength [5]. Due to these considerations, the optimization will be based on the TLA rotor type.…”

Comprehensive design and analysis of a PMaSynRM for washing machine applications

“…of UMs. Permanent magnet assisted synchronous reluctance machines (PMaSynRMs) are becoming an alternative to these motors in home appliance industry [1]. These motors are also comparable to IMs in industrial applications because of their less rotor volume, low cost and higher power density [2].…”

Aki Bari̇yerli̇ Tla Ti̇pi̇ Senkron Relüktans Motor Tasarimi Ve Opti̇mi̇zasyonu

“…Aynı hava boşluğuna sahip yeni rotor tasarımı asenkron motorun rotoru yerine yerleştirmişlerdir. Analiz ve uygulama sonuçlarına bakıldığında maksimum moment 1,13 Nm, akım 1,1 A ve 3000 devirde verimlilik %70,9'dan %73,3 değerine ulaşmıştır [16]. Vagati vd.…”