Investigation of fault‐tolerant capability of five‐phase doubly salient electromagnetic generator

Zhao, Youqun; Wang, Huizhen; Xiao, Lan

doi:10.1049/iet-epa.2014.0058

Cited by 34 publications

(18 citation statements)

References 27 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since there is no constraint on the phase number of the generator for dc power generation application, multi-phase DSEM machines also arouse the interest of scholars due to the high fault-tolerance. The four-phase 8/6-pole and five-phase 10/8-pole DSEM machines are illustrated in Fig. 1a [9,16]. maximum when the stator pole that corresponds to the A-phase winding is aligned with the rotor pole in the rotor position θ r =0°( electrical degree).…”

Section: Configurationsmentioning

confidence: 99%

See 1 more Smart Citation

Overview and design methodology of doubly salient brushless dc generators with stator‐field winding

Zhang

Wang

et al. 2017

IET Electric Power Applications

View full text Add to dashboard Cite

This study introduces a doubly salient brushless dc (DSBLDC) generator with stator-field winding, which incorporates the doubly salient electromagnetic (DSEM) machine and its associated rectifier. The configuration, operation principle, and armature reaction of different generating mode are overviewed. The sizing equation is derived for the initial dimension design of the DSEM machine. Then the non-linear varying-network magnetic circuit method for preliminary design is proposed to determine the fundamental geometric parameters, the corresponding field magnetomotive force, and winding configurations iteratively, in which the magnetic saturation is taken into account. Furthermore, optimal design of the geometric parameters is comprehensively investigated by finite-element analysis, and the optimised coefficients obtained for different generating mode. The operating characteristics of the DSBLDC generator with compensation capacitors are investigated to improve the voltage regulation performance. A prototype of 12 kW DSEM machine has been designed and optimised by the proposed design methods. Experiments are performed and the results verify the predictions and the design methods. Due to the simple and robust structure without permanent magnet, as well as convenient and flexible control, the promising DSEM machine is a desirable candidate for dc power generation.

show abstract

Section: Configurationsmentioning

confidence: 99%

“…q is defined as and j is defined as j = P P 2 (16) where i 2prms is rms value of the positive phase current; P 2 is output power in the period of positive current. Due to the asymmetry phase inductance, the positive and negative phase current is not identical.…”

Section: Sizing Equationmentioning

confidence: 99%

Overview and design methodology of doubly salient brushless dc generators with stator‐field winding

Zhang

Wang

et al. 2017

IET Electric Power Applications

View full text Add to dashboard Cite

show abstract

“…To play the advantages of doubly salient brushless generator and multi-phase generator, [30] proposed the fault-tolerant performance of a traditional five-phase WFDSG and verified that the generator has good fault-tolerant performance. This traditional five-phase WFDSG has five armature windings for each excitation coil, and there is a certain difference in the flux linkage and inductance amplitude of each phase [31].…”

Section: Introductionmentioning

confidence: 99%

Topology Comparison Study of Five-Phase Wound-Field Doubly Salient Fault Tolerant Generators

Shi

Zhang

2019

Applied Sciences

View full text Add to dashboard Cite

To present the characteristics of pole number and pole shape of the core, the five-phase wound-field doubly salient generators (WFDSGs) with symmetric phase inductance are studied and optimised in this paper, considering the split ratio, slot fill factor and core fringing effect. Based on the principle and structure of the five-phase WFDSGs, the winding induced electro-motive force under different number of poles is theoretically analysed. The constraints for parameter optimisation design including slot fill factor, split ratio and magnetic density characteristic are given. The finite element models of 30/24-pole and 20/16-pole WFDSG are established, and the comparative simulation analysis is carried out. It is pointed out that when the inner and outer diameters of the stator and rotor, the axial length and the maximum magnetic density are constant, the induction electromotive forces of the WFDSGs with different pole numbers and same phase coil number are same. Considering the pole fringing effect, the rotor pole equivalent width is the sum of the rotor pole actual width and 4 times of the air gap. The comparison experiments between the 30/24-pole and 20/16-pole WFDSGs were carried out, which verified the correctness of the theoretical analysis and finite element analysis (FEA).

show abstract

“…Therefore, fault-tolerant systems have attracted lots of interests in recent years [2][3][4][5]. Reliability calculations in power electronic systems are considered [6] and many solutions have been proposed to make power electronic converters and drive systems more reliable and fault tolerant [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Fault‐tolerant structure for cascaded H‐bridge multilevel inverter and reliability evaluation

Haji-Esmaeili

Naseri

Khounjahan

et al. 2017

IET Power Electronics

115

View full text Add to dashboard Cite

In this study, a fault-tolerant structure and its controlling method for a cascaded H-bridge multilevel inverter is introduced. When a fault occurs in one of the modules, the proposed circuit is able to isolate and eliminate the defective module from the whole system. The isolation and elimination is done by four relays in each module and a controlling circuit. This solution makes the system continue the normal operation by means of the remained healthy modules with decreased output voltage level. Therefore, the whole system failure will be prevented and higher reliability of the inverter will be guaranteed. Principles of operation and the controlling method are presented in this study. Reliability evaluation and comparison of the proposed fault-tolerant structure and the conventional one are considered. To ensure the correct performance of the proposed cascaded H-bridge multilevel inverter, a prototype has been synthesised in the laboratory. The obtained results affirm higher reliability and mean time to failure of the proposed circuit, so suitability of the proposed structure for sensitive industrial applications is confirmed.

show abstract

Investigation of fault‐tolerant capability of five‐phase doubly salient electromagnetic generator

Cited by 34 publications

References 27 publications

Overview and design methodology of doubly salient brushless dc generators with stator‐field winding

Overview and design methodology of doubly salient brushless dc generators with stator‐field winding

Topology Comparison Study of Five-Phase Wound-Field Doubly Salient Fault Tolerant Generators

Fault‐tolerant structure for cascaded H‐bridge multilevel inverter and reliability evaluation

Contact Info

Product

Resources

About