Optimization Design of a New Type of Interior Permanent Magnet Generator for Electric Vehicle Range Extender

Abstract

Aiming at the disadvantages of large leakage flux and low magnetic flux density of radial magnetic circuit and tangential magnetic circuit, a new type of permanent magnet (PM) rotor with parallel tangential and radial magnetic circuits is proposed. Based on Ohm’s law and Kirchhoff’s law of magnetic circuits, equivalent magnetic circuits for rotor poles are developed. The structure parameters of the generator are preliminarily determined. At the same time, by means of the Taguchi method and employing finite element analysis, the rotor poles of generator are optimized to improve air gap magnetic density, the cogging torque, and the distortion of back-EMF waveform. Finally, the validity of proposed design methods is validated by the analytical and experimental results.

Analysis of Multi-Objective Optimization Design of Interior Double Radial and Tangential Combined Magnetic Pole Permanent Magnet Drive Motor for Electric Vehicles

“…In order to express the data more intuitively, the change of each optimization parameter with the performance parameter is represented by a bar graph [26], as shown in Figures 4-6. From the above three graphs, it can be seen that these three horizontal combinations are designed for the optimization of individual performance indicators.…”

A Review on Transverse Flux Permanent Magnet Machines for Wind Power Applications

“…The machine power in these sizing equations is directly proportional to stack length and square of machine diameter. In general, if stator leakage inductance and winding resistance are neglected, the output power for any electrical machine can be shown as [146]: 0 ( ) ( ) T R p pk pk m P e t i t dt mK E I T    (10) where PR is the rated power,  is the efficiency, m represents the number of phases, e(t) and Epk are the phase EMF and its peak value, Kp is the power waveform factor, i(t) and Ipk are the phase current and the peak phase current, T represents the period of one cycle of the EMF. The analytical demonstration of EMF in terms of PM height for double-sided flux concentrated topology is presented in [147].…”

“…Various investigations have been carried out to analyze different kinds of generators suitable for direct-drive wind turbine applications. It was discovered that the permanent magnet synchronous generator (PMSG) is the most appropriate solution for this purpose with higher energy yield, better reliability, higher torque-to-cost ratio, higher efficiency and less weight than the electrically excited synchronous generator (EESG) [10].…”

Design and Characteristics Investigation of Novel Dual Stator Pseudo-Pole Five-Phase Permanent Magnet Synchronous Generator for Wind Power Application

“…In embedded pole system [41], the permanent magnets are buried in the rotor firmly which makes the model complex. The embedded-pole magnets are more reliable and robust as compared to surfacemounted PMSG [42]- [45]. Nevertheless, the close proximity of magnets to both the inner and outer stator windings often lead to demagnetization of the magnets due to persistent heat from the windings which effects the overall functionality of PMSG [46].…”