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Energies 2017, 10(10), 1460; https://doi.org/10.3390/en10101460

A Novel Optimal Current Trajectory Control Strategy of IPMSM Considering the Cross Saturation Effects

College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
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Received: 10 August 2017 / Revised: 5 September 2017 / Accepted: 15 September 2017 / Published: 21 September 2017
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

Abstract: The nonlinearity and uncertain variation of machine parameters are always caused by cross coupling and magnetic saturation effects, which are easily neglected in the conventional control strategy. In this paper, a current trajectory control strategy (CTCS) is proposed to take the cross coupling and magnetic saturation effects into account under voltage and current constraints. It can be considered as a calculating method considering parameter variation and separating among each iteration step which treats the calculated result of the former step as the initial value of the next step. At first, the torque command is translated into the current reference. Then, the increments between the target value and real value of the torque and the voltage are respectively calculated, which are subsequently converted into the current modification vector in did, diq framework for further analysis. In order to take the influence caused by cross coupling and magnetic saturation effects on the CTCS into consideration, self and mutual inductances are analyzed by finite element analysis (FEA). The results of the simulation and experiment show that the rapid response and robustness on reference speed variation could be achieved by employing the proposed CTCS, and the seamless switching between the constant torque and flux-weakening operation can also be realized. View Full-Text
Keywords: current trajectory control strategy (CTCS); cross coupling effect; magnetic saturation effect; maximum torque per ampere (MTPA) current trajectory control strategy (CTCS); cross coupling effect; magnetic saturation effect; maximum torque per ampere (MTPA)
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Li, H.; Gao, J.; Huang, S.; Fan, P. A Novel Optimal Current Trajectory Control Strategy of IPMSM Considering the Cross Saturation Effects. Energies 2017, 10, 1460.

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