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To solve the velocity-measurement difficult problem of linear motor in high speed and high acceleration occasions, a velocity-measurement method based on teeth-slots signals detection is proposed in this paper. In this method, the speed signal is obtained from the inductance periodic variation of probe coil, and the "teeth-slots" bar consisting of conductor and ferromagnetic materials alternating...
This paper describes the operation of modular multilevel converter (MMC). A control method of adding the feed-forward current is introduced. Another strategy of removing the second harmonic current is also described in order to improve the arm currents. Simulation results based on a detailed PSIM model prove the effectiveness of the two methods. The paper presents principle of parameters selection...
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