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This paper analyzes critical control issues associated with the deep field weakening operation of interior permanent magnet (IPM) synchronous machines. The singlecurrent-regulator control algorithm is reviewed, which controls the d-axis current actively and gives a fixed q-axis voltage command. To achieve better operational efficiency and performance, improvements are made to choose an optimal q -axis...
The critical control issues of deep field weakening operation of PM machines are analyzed in this paper. The mathematical model of PM machines and the traditional current vector control method are reviewed. Then a simple yet reliable control method based on direct voltage vector control for deep field weakening operation of PM machines is proposed. When the speed is below the base speed, the traditional...
The single current regulator algorithm has been proven robust for flux weakening control of surface-mount PM (SPM) machines with active control of d-axis current and a fixed value of q-axis voltage applied. This paper proposes a new method to optimize the q-axis voltage adaptive to variable speeds and torque based on the single current regulator algorithm for the deep flux weakening control of a 50...
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