| Summary: | 碩士 === 國立成功大學 === 電機工程學系碩博士班 === 92 === This thesis mainly focuses on studying the current phase advance control technique without dealing with coordinate transformation of the current components, in which this technique can be applied to the interior permanent magnet synchronous motor so that the motor’s speed range in the flux weakening region can be extended. Compared with the conventional sinusoidal flux-weakening control, this method has advantages such as “easy to be understood” and “not computation intensive”. These salient features facilitate the implementation of flux-weakening current control using ICs.
Due to the fact that the Back EMF of the IPM motors used in this study is neither sinusoidal nor trapezoidal, hence the six-step square-wave and VSVPWM techniques, combined with a new generation digital signal processor TMS320F2812, are employed to implement fully digital current phase advance control for the cases of square-wave and sinusoidal-wave, respectively. In addition, several experiments are conducted to compare the speed improving performance, efficiency, and implementation complexity of these two current phase advance control techniques. Experimental results are expected to provide a general criterion for selecting proper control strategies so that the speed range of the IPM motors in the flux weakening region can be extended.
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