A novel doubly salient electro-magnetic generator with symmetrical phase magnetic circuits: Basic topology, analysis, and experimental verification

The field winding of conventional multiphase doubly salient electro-magnetic generator is wound across multiple stator poles. There is a problem that the flux paths of the respective phases are not completely symmetrical. A novel E-core stator was proposed, the basic topology of the multi-phase E-core doubly salient electro-magnetic generator (E-core DSEG) with symmetrical phase magnetic circuits is derived by using the electrical formulas. This establishes a theoretical basis for the design of multiphase E-core DSEG. Based on the finite element simulation software, the static characteristics of multi-phase E-core DSEG were analyzed, including magnetic field distribution no-load electromotive force, flux linkage, self-inductance of field winding, cogging torque and so on. Finally, a prototype of three phases 18/20-pole generator was made and tested. The rationality of theoretical analysis and generator topology was verified by simulation and experiment.

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Research on AC Voltage Regulating System of Doubly Salient Electro-Magnetic Generator

2010 International Conference on E-Product E-Service and E-Entertainment ◽

10.1109/iceee.2010.5661141 ◽

2010 ◽

Cited By ~ 1

Author(s):

Weili Dai ◽

Feng Hong ◽

Huizhen Wang ◽

Yangguang Yan

Keyword(s):

Doubly Salient ◽

Electro Magnetic ◽

Magnetic Generator

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Non-uniform air gap modeling and electromagnetic characteristics of a new six-phase doubly salient electro-magnetic generator

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209451 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 1325-1335

Author(s):

Xiaoyu Zhou ◽

Liwei Shi ◽

Junhao An ◽

Fukang Ding

Keyword(s):

Finite Element ◽

Linear Structure ◽

Mutual Inductance ◽

Air Gap ◽

Electromagnetic Properties ◽

Element Analysis ◽

Doubly Salient ◽

Electro Magnetic ◽

Magnetic Generator ◽

Gap Structure

The voltage harmonics of the six-phase doubly salient electro-magnetic generator (DSEG) are large, and the electromagnetic isolation is poor due to the mutual inductance of the armature winding. An optimization scheme for the stator non-uniform air gap structure is proposed. By establishing a non-uniform air gap angle function model, the analytical expression of the induced electromotive force in the non-uniform air gap structure is derived. Using finite element and mathematical model to verify that the stator tip is changed from circular arc to linear structure can increase power and reduce voltage high harmonics, improve the power quality of the generator. Based on the equivalent magnetic circuit, the influence of the winding method of the excitation winding on the mutual inductance of the armature winding is studied. When the field winding is wound interval every two stator poles, the mutual inductance is small. The electromagnetic properties of the new six-phase electric excitation double salient pole are analyzed by two-dimensional finite element analysis. The rationality of the proposed motor structure is verified by experiments.

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