Trend of permanent magnet synchronous machines

Morimoto, Shigeo

doi:10.1002/tee.20116

Cited by 69 publications

(18 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this design, hybrid excitation generator rated voltage is 28 V, rated power is 5 kW, and rated speed is 4000 r/min. Permanent magnet materials is NTP-240SH [26,27], and its remanent flux density Br is 1.12 T. The magnetic field strength Hc is 804 kA/m, and the maximum energy product (BH) max is 223 kJ/m 3 . Under the conditions of load power is 1.9 kW, 2.0 kW and 2.1 kW, the newly developed hybrid excitation generator is tested from low speeds to high speeds.…”

Section: Performance Testmentioning

confidence: 99%

Development and Analysis of the Magnetic Circuit on Double-Radial Permanent Magnet and Salient-Pole Electromagnetic Hybrid Excitation Generator for Vehicles

Zhang

et al. 2019

Chin. J. Mech. Eng.

View full text Add to dashboard Cite

With the improvement of vehicles electrical equipment, the existing silicon rectification generator and permanent magnet generator cannot meet the requirement of the electric power consumption of the modern vehicles electrical equipment. It is difficult to adjust the air gap magnetic field of the permanent magnet generator. Consequently, the output voltage is not stable. The silicon rectifying generator has the problems of low efficiency and high failure rate. In order to solve these problems, a new type of hybrid excitation generator is developed in this paper. The developed hybrid excitation generator has a double-radial permanent magnet, a salient-pole electromagnetic combined rotor, and a fractional slot winding stator, where each rotor pole corresponds to 4.5 stator teeth. The equivalent magnetic circuit diagram of permanent magnet rotor and magnetic rotor is established. Magnetic field finite element analysis (FEA) software is used to conduct the modeling and simulation analysis on double-radial permanent magnet magnetic field, salient-pole electromagnetic magnetic field and hybrid magnetic field. The magnetic flux density mold value diagram and vector diagram are obtained. The diagrams are used to verify the feasibility of this design. The designed electromagnetic coupling regulator controller can ensure the stable voltage export by changing the magnitude and direction of the excitation current to adjust the size of the air gap magnetic field. Therefore, the problem of output voltage instability in the wide speed range and wide load range of the hybrid excitation generator is solved.

show abstract

Section: Performance Testmentioning

confidence: 99%

Development and Analysis of the Magnetic Circuit on Double-Radial Permanent Magnet and Salient-Pole Electromagnetic Hybrid Excitation Generator for Vehicles

Zhang

et al. 2019

Chin. J. Mech. Eng.

View full text Add to dashboard Cite

show abstract

“…Voltage unbalance is one of the most common power quality problems. By installing permanent magnets (PMs) in the squirrel‐cage rotor, the line start permanent magnet synchronous motor (LSPMSM) has excellent steady‐state performance of high efficiency, high power factor and high torque density . It can also start up directly from the grid and is easily affected by voltage unbalance.…”

Section: Introductionmentioning

confidence: 99%

Influence of voltage unbalance on the steady‐state performance of line start permanent magnet synchronous motors

Qiu

et al. 2019

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

The line start permanent magnet synchronous motor (LSPMSM) can be used for direct-on-line (DOL) starting, so it is easily affected by voltage unbalance. Based on the finite element method (FEM) and analytical method, the influence of voltage unbalance on the steady-state performance of LSPMSM is studied in this paper. A two-dimensional finite element model is built, and the armature current, losses and torque ripple as a function of the phase voltage unbalance rate (PVUR) are obtained. The influence mechanism of voltage unbalance on the steady-state performance of a motor is demonstrated. Finally, a prototype of LSPMSM is manufactured and tested. By comparing the experimental data with the simulation data, the accuracy of the calculation model is verified, and the correctness of the research is proved. Hongbo Qiu(Non-member) received his graduation degree from the Harbin University of Science and Technology, Harbin, China, and a Ph.D. in electrical engineering from the same university in 2014. He has been with the Zhengzhou University of Light Industry, Zhengzhou, China, since 2014. His research interests include electromagnetic and thermal analysis on electrical machines, especially in permanent magnetic machines.

show abstract

“…Neodymium-iron-boron (NdFeB) permanent magnets, permanent magnets (PMs), offers a high energy product and are today widely used in generators and motors for different applications [1,2]. However, the use of rare-earth metals has been debated for the last couple of years for cost and environmental reasons.…”

Section: Introductionmentioning

confidence: 99%

Determining demagnetisation risk for two PM wind power generators with different PM material and identical stators

Sjökvist

Eklund

Eriksson

2016

IET Electric Power Applications

View full text Add to dashboard Cite

Ways to utilise ferrite permanent magnets (PMs), in a better way has been in focus the last couple of years since the use of neodymium-iron-boron (NdFeB) PMs has been debated. While ferrite PMs offer a low-cost alternative to rareearth PMs, it is a trade-off for lower energy density. Depending on the type of PM and if the PMs are surface mounted or buried, the risk of demagnetisation during a fault condition can vary significantly between machines. In this study, the demagnetisation risk of two electrically similar generators with identical stators has been studied during several shortcircuit faults at different temperatures. The study is simulation-based, and the results show that the generator with the ferrite rotor will suffer from a small but not significant amount of demagnetisation in the worst, three-phase-neutral, short-circuit case at a temperature of 5°C, whereas the NdFeB PMs will suffer from partial demagnetisation if a fault occurs at 120°C. For operational temperatures between 20 and 60°C both generators will sustain a short-circuit event.

show abstract

Trend of permanent magnet synchronous machines

Cited by 69 publications

References 10 publications

Development and Analysis of the Magnetic Circuit on Double-Radial Permanent Magnet and Salient-Pole Electromagnetic Hybrid Excitation Generator for Vehicles

Development and Analysis of the Magnetic Circuit on Double-Radial Permanent Magnet and Salient-Pole Electromagnetic Hybrid Excitation Generator for Vehicles

Influence of voltage unbalance on the steady‐state performance of line start permanent magnet synchronous motors

Determining demagnetisation risk for two PM wind power generators with different PM material and identical stators

Contact Info

Product

Resources

About