Study on interior permanent magnet synchronous motors for hybrid electric vehicle traction drive application considering permanent magnet type and temperature

Abstract

Abstract:Recently, interior permanent magnet synchronous motors (Interior-PMSMs) have become known as a good candidate for hybrid electric vehicle (HEV) traction drive application due to their unique merits. However, the dynamic and steady-state behaviors of these motors are quite dependent on the permanent magnet (PM) type, configuration, and volume in rotor structures. This paper uses a novel structure of Interior-PMSMs for traction applications with fragmental buried rotor magnets in order to achieve low torque ripple, iron losses, and cogging torque. In this paper, first, the effect of the PM type on a d-q equivalent circuit model is examined. Next, the design and simulation of an Interior-PMSM for HEV traction drive application, in order to extract the output values of the motor and sensitivity analysis of the PM type, are done using a 3-dimensional finite element method model. We then present the back electromotive force, power factor, cogging torque, flux density, torque per ampere diagram, PM volume, and constant power speed ratio value behavior of the designed Interior-PMSM with different PMs in the rotor structure, and we discuss the effect of temperature variation on these output parameters. This study can help designers in the design approach of such motors.

A Parameter Independent Stator Current Space-Vector Reference Frame-Based Sensorless IPMSM Drive Using Sliding Mode Control

“…Also in Europe, the use of the IPMSM for electric vehicle traction and hybrid electric vehicle applications has been discussed. In these applications, the main features of IPMSM are uncomplicated construction with conventional 3-phase stator windings, with low current density, and a rotor with inner fragmental permanent magnets [1][2][3].…”

Analytical modeling‐based optimal design of multilayered and multisegmented D‐type interior permanent magnet synchronous motor

“…23, a novel V‐type rotor structure comprised of three layers is proposed in Ref. 26 to improve efficiency and average torque and reduce losses and torque ripple. Moreover, fragmental buried PMs are used to improve the motor performance.…”

Transverse flux permanent magnet generator design and optimization using response surface methodology applied in direct drive variable speed wind turbine system

“…The most important part of these kinds of systems are permanent magnet type generators that have less weight and volume and less cooper and iron losses, more TPC, power factor and efficiency, less mechanical problems and more longevity than their rivals. [5][6][7][8] Among all kinds of permanent magnet synchronous generator types, Transverse Flux Permanent Magnet Generators are the top options for low speed systems and wind turbines because of these merits [4,5,[9][10][11]:  Better cooling condition because of better heat distribution in stator  Removing the armature reaction effect  Low copper loss because of having lower end winding in concentrated winding  Facility in maintenance  Possibility of being made with a very small pole pitch in comparison with the radial and axial permanent magnet machine. So it can be design by low machine diameter  High power and torque density (smaller active mass than the other machines to produce the same torque) and low weight because of having hollow rotor core  Flexibility in geometry design with several kinds of structure  Increasing the windings space without reducing the available space for the main flux  Ability to provide a significant cost advantage in active material in comparison with Radial or Axial Flux Permanent magnet machines for small air-gap…”