Study on rotor magnetomotive force comparison of doubly-fed brushless machine with cage rotor or wound rotor

Li, Guangzhong; Xiaoping, Ding; Xiao, Qianghui; Feng, Zhou

doi:10.1109/icems.2005.202925

Cited by 1 publication

(3 citation statements)

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“…These two modes can be used for determining machine parameters. The operation of the BDFM can be described by a per-phase equivalent circuit of the form shown in Fig. 2a [13]. Values are shown referred to the power winding and iron losses are neglected.…”

Section: Bdfm Basics and Configurationmentioning

confidence: 99%

“…Others have looked theoretically at conventional rotor winding design, including Guangzhong et al [13]w h o proposed a method for considering the air-gap MMF of cage or wound BDFM rotors, Liu et al [14] proposing particular connections for the rotor winding, Blazquez et al [15] characterised the rotor magnetic field.…”

Section: Introductionmentioning

confidence: 99%

“…Per-phase BDFM equivalent circuits a Per-phase equivalent circuit for the BDFM from[13] b Simplified per-phase equivalent circuit from[12] Rotor winding diagrams a SW rotor b NL rotor…”

mentioning

confidence: 99%

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Characterising brushless doubly fed machine rotors

McMahon

Tavner

Abdi

et al. 2013

IET Electric Power Applications

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The brushless doubly fed machine (BDFM) is a robust alternative to the doubly fed induction generator, currently widely used in wind turbines but prone to brush-gear and slip-ring failure. The rotor winding plays an important part in a BDFM, coupling the two stator windings. To date, nested-loop (NL) rotor windings have been exclusively used in practical BDFM. This approach may not be ideal for larger machines, in which form-wound series-loop rotor winding may be preferable to large section bars and end-rings. This study gives a comparative analytical and experimental study of two different brushless doubly fed 160 frame-size rotors, with NL or series-wound windings, mounted in identical rotor core laminations operating in the same stator tested at a limited voltage (200 V line). The rotors gave a performance which accords with theoretical predictions from two independent methods, giving insight into the design issues of the different rotor windings from both an electrical and manufacturing viewpoint. Nomenclature List of symbols X 1 , X 2 , X r indicating, respectively, stator1, stator 2 and rotor winding quantities p 1 , p 2 stator winding pole-pair numbers q phase number f 1 , f 2 supply frequencies s 1 , s 2 slips of different winding systems N shaft speed N eff1,2&r effective number of turns for the stator, 1&2 , and rotor, r , windings n 1,2&r turns ratios of stator, 1&2 , and rotor, r , windings k w winding factor k p pitch factor γ winding pitch angle R, L winding resistance and inductance Z impedance of a rotor loop www.ietdl.org

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Section: Bdfm Basics and Configurationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%