Performance Analysis of Permanent Magnet Motors for Electric Vehicles (EV) Traction Considering Driving Cycles

Abstract

This paper evaluates the electromagnetic and thermal performance of several traction motors for electric vehicles (EVs). Two different driving cycles are employed for the evaluation of the motors, one for urban and the other for highway driving. The electromagnetic performance to be assessed includes maximum motor torque output for vehicle acceleration and the flux weakening capability for wide operating range under current and voltage limits. Thermal analysis is performed to evaluate the health status of the magnets and windings for the prescribed driving cycles. Two types of traction motors are investigated: two interior permanent magnet motors and one permanent magnet-assisted synchronous reluctance motor. The analysis results demonstrate the benefits and disadvantages of these motors for EV traction and provide suggestions for traction motor design. Finally, experiments are conducted to validate the analysis.

DSP Implementation of a Neural Network Vector Controller for IPM Motor Drives

“…Both the NN and conventional PI controllers were tested for a comparison evaluation while using the same SVPWM and the same strategy to limit the increase of the reference currents to prevent the motor inverter from operating beyond the six-step modulation region. During the experiment, the actual values of the motor parameters could be different from the nominal values that are shown in Table 1, as reported in many previously published papers [33]. Even so, the NN control shows a strong adaptive ability to handle the parameter uncertainties.…”

Challenges of the Optimization of a High-Speed Induction Machine for Naval Applications

“…L stk = 1 m). In this way the result is independent of the voltage and the power rating of the actual motor [10]. The resulting equivalent circuits are therefore normalized, in the sense that they are suitable for any motor adopting the stated lamination geometry and winding distribution.…”

“…Tesla has recently introduced the permanent magnet AC machine for the Model 3 in 2017 [9]. However, the decision regarding the best technology has to take into account many system aspects, including the driving cycle [10], which for electric vehicles always has low-speed (urban) and high-speed (highway) phases.…”

GPIO-Based Nonlinear Predictive Control for Flux-Weakening Current Control of the IPMSM Servo System

“…IPMSM and SPMSM have different permanent magnets' installation positions in the iron core, and therefore they have different inductance characteristics, i.e., the IPMSM has a bigger quadrature-axis inductance than the direct-axis inductance while the SPMSM has almost the same direct-axis and quadrature-axis inductances. Hence, the IPMSM can provide a considerable reluctance torque (which is a part of the mechanical torque) while the SPMSM has almost no reluctance torque [4][5][6]. Moreover, to exploit the potential performance of IPMSM, a flux-weakening (FW) control framework rather than a traditional i d = 0 control framework must be employed [7][8][9].…”