Electromagnetic performance of three‐phase doubly fed doubly salient electromagnetic generator

Zhao, Youqun; Wang, Huizhen

doi:10.1049/iet-epa.2015.0232

Cited by 13 publications

(5 citation statements)

References 22 publications

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“…Compared with the robust DSEM machine, the associated rectifier is the vulnerable component. Thus, the single-phase full-bridge rectifier [17] and hybrid half-bridge rectifier with dual armature winding [18] are studied for fault tolerance of the DSBLDC generator. The hybrid excitation doubly salient machines are proposed to reduce the field copper loss and improve the power density [19][20][21].…”

Section: Iet Electric Power Applicationsmentioning

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

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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.

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Section: Iet Electric Power Applicationsmentioning

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

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“…The combination of AC and DC generators is being also made for wind power generation. 43 Nevertheless, 2 projects similar to the core shape of prototypes A and B are as follows: a system gear to make a DC motor run from vertical motion and store up energy in a supercapacitor 44 and a wheel spinning with several NdFeB magnets, 45 using rotational mechanical force to generate energy. However, generators based on cheaper fuels like naphtha generate 2 kW consuming 2.7 L/h.…”

Section: Other Projects Based On Energy Generationmentioning

confidence: 99%

“…Another project involving different numbers of turns in the 2 sets of armature windings and a doubly fed, 3-phase, doubly salient electromagnetic generator harvests over 119.44 V and 7 A. 43 Nevertheless, 2 projects similar to the core shape of prototypes A and B are as follows: a system gear to make a DC motor run from vertical motion and store up energy in a supercapacitor 44 and a wheel spinning with several NdFeB magnets, 45 using rotational mechanical force to generate energy. How well they function depends on the use they are set up to and the environment in which they work.…”

Section: Other Projects Based On Energy Generationmentioning

confidence: 99%

A new configuration of 2 electromagnetic power generators for mechanical energy conversion by spinning a ferrite magnet in flat form

2017

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Summary Two electromagnetic power generators were designed and built with the purpose of creating a safe, noncarbon emitting, and long‐lasting source of energy. Prototype A has 20 coils and B has 10 coils. Each one has 2 flywheels, a second‐hand ferrite magnet that spins over the horizontal plane (lateral axis), and neodymium magnets (NdFeB). A literature review is provided covering the origins of the first direct current generators up to the most widely used contemporary alternating current power generators, comparing them with both prototypes. These were compared with each other to determine which performs better by making mathematical projections and checking them experimentally. The prototypes are based on an innovative configuration for mechanical energy conversion, which supplies power every time the system is in motion. The harvested energy has shown results—in terms of output power, power density, and specific power—which depend on several factors, such as the mechanical force induced and the period of time they remain spinning by the flywheels. The different parameters of the systems, which include connections, structure details, spinning plane, experimental results, and materials, are specified. Advantages and disadvantages are also analyzed, including some immediate real‐life applications. The designs have been improved by changing the shape of the coils and magnets as a whole to create enduring power systems.

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“…Compared to the DSPM, the DSEM is totally PM-free machine, which gains many advantages. The excitation flux can be restrained quickly in the case of a fault, which is the basic requirement in the safety-critical applications such as the main generator of the aircraft [4,5]. The field winding simplifies the flux-weakening method, which leads to a wide constant power speed range.…”

Section: Introductionmentioning

confidence: 99%

Indirect measurement and extreme learning machine based modelling for flux linkage of doubly salient electromagnetic machine

Zhang

et al. 2018

IET Electric Power Applications

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Doubly salient electromagnetic machines (DSEMs), which are characterised with fault tolerance, low cost, high reliability, and de-excitation ability, are gaining more and more attention in safety-critical and hash environment applications, such as the aircraft generation systems. Nevertheless, the non-linear and strong coupled characteristics of the flux linkage is the obstruct crux in DSEM modelling. The DSEM model is the critical part of the system model, which is the foundation of theoretical analysis, control strategy developing, and stability analysis. This study is aimed to demonstrate the feasibility of indirect flux linkage measurement method, as well as the effectiveness of the extreme learning machine (ELM)-based flux linkage modelling method. The basic principles of the indirect measurement are analysed and the measurement processes excluding rotorclamping devices are proposed. The ELM is employed to high-precision flux linkage modelling with high efficiency. A threephase 12/8-pole DSEM is tested to confirm the validity of the proposed modelling method. Both finite element analysis and experimental results are presented, verifying the effectiveness of the indirect flux linkage measurement and the ELM-based modelling method. Fig. 12 Characteristics of the DSEM based on ELM flux linkage model, FEA simulation, and experiment (a) No-load characteristic, (b) Output characteristic

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Electromagnetic performance of three‐phase doubly fed doubly salient electromagnetic generator

Cited by 13 publications

References 22 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

A new configuration of 2 electromagnetic power generators for mechanical energy conversion by spinning a ferrite magnet in flat form

Indirect measurement and extreme learning machine based modelling for flux linkage of doubly salient electromagnetic machine

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