This paper shows an online MTPA control which considers not only magnetic saturation but also cross-coupling effects. In automotive applications, torque accuracy and high efficiency operation are important issues. It can be dealt as a constrained optimization problem to satisfy both torque reference tracking and loss minimizing operation. Nonlinear simultaneous equations are derived from Lagrange multiplier method, which could be solved by numerical algorithms. Among them, Levenberg-Marquardt algorithm is employed to guarantee a robust calculation of optimal current references. It is optimized to alleviate calculation burden while maintaining the stability of the proposed algorithm. The feasibility of the proposed method is verified under various operating conditions by simulation and experimental results. Through the proposed algorithms, accurate MTPA control is achieved under not only unsaturated but also highly-saturated operating conditions.
Online MTPA Control of IPMSM for Automotive Applications Based on Robust Numerical Optimization Technique
01.06.2018
635304 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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