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This paper analyzes critical control issues associated with the deep flux-weakening operation of interior permanent magnet (IPM) synchronous machines. Then we review the single-current-regulator control algorithm 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 qaxis...
This paper presents a special flux-weakening control scheme for permanent magnet synchronous machines (PMSM) over wide speed range. In contrast to conventional two-loop (d-, q-axis) control methods, the proposed control scheme achieves both flux-weakening and speed control simultaneously using only one speed/flux-weakening controller. The controller automatically generates both the required demagnetizing...
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