Interior permanent magnet synchronous motor control for electric vehicle using look-up table

Abstract

This paper proposes a look-up table based maximum torque control of interior permanent magnet synchronous motor (IPMSM) for traction of electric vehicles (EV). Maximum torque control is preferable for traction requirement of EV due to requirements of high torque ability in lower speed and wideadjustable operation range. In constant torque region (below rating speed), Maximum Torque per Ampere (MTPA) can achieve perfect performance, while in field-weaking region (over rating speed), the torque control usually is not satisfactory. The main problem is that on-line calculation of current commands is too complex and time-consuming in real control system. We solved the problem through construction of look-up table for d-axis current off-line, and on-line calculation of q-axis current using torque equation. It can not only permit the maximum torque control performance but also easy for micro-controller to implement. Finally, simulation and experimental system were constructed to verify the proposed method, and results have been found in good agreement with theoretic analysis.

Maximum Torque Per Ampere (MTPA) Control for Interior Permanent Magnet Synchronous Machine Drives Based on Virtual Signal Injection

“…In (18), the motor parameters L d , L q , Ψ m can be assumed as their nominal values or obtained from predefined LUTs. As it is shown in (15), the torque variation information is obtained independently from motor parameters.…”

“…However, it Manuscript was recognized that an accurate and computationally efficient model for these parameters as functions of current is difficult to derive. Lookup tables (LUTs) are, therefore, employed in [9], [18]- [21] to facilitate the MTPA control. The LUT data may be obtained from the numerical analysis of electromagnetic field of the machine under consideration.…”

Adaptive Backstepping Based MTPA Sensorless Control of PM-Assisted SynRM with Fully Uncertain Parameters

“…The --axis reference currents predetermined through offline method are a good solution. One of the representative offline methods is look-up table method [11], which is easy to execute but adds burden to store and requires extra offline effort [12]. Additionally, conventional MTPA control relies heavily on precise modeling parameters.…”

Fast Real-Time Constrained Predictive Current Control in Permanent Magnet Synchronous Machine-Based Automotive Traction Drives

“…This paper focuses only on the current control problem, which is a challenging problem for the automotive electric traction drives due to the presence of quadratic constraints for the stator currents and voltages in the rotor reference frame [13]. The dominant solution in industry for this problem is based on the traditional proportionalintegral (PI) controllers [14]- [18]. However, the PI based control solution cannot explicitly enforce constraints which is a serious limitation in applications such as automotive electric traction drives which are characterized by high values of currents and voltages.…”