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High magnetic field is one of the most significant tools for scientific experiments. To obtain higher magnetic field, a nondestructive magnet aimed at generating 100 T, which achieves the best utilization of the power supplies at the Wuhan National High Magnetic Field Center, is designed. This magnet will make up of three coils nested coaxially. The inner coil and the middle coil will be energized...
A DTC-SVM sensorless induction motor control system based NPC three-level is presented in this paper. In order to maintain high performance of the system, accurate stator flux is necessary. A novel phase compensation stator flux observer is proposed in the paper. Furthermore, a three-level phase voltage reconstruction algorithm is proposed as the base of the high precision flux observer firstly in...
Based on the mathematical model of the three-level PWM rectifier, its power mathematical model was obtained by combining with instantaneous power theory. And the power expression was obtained by analyzing the rectifier under unbalanced network voltage. On this basis, the DPC-SVM control strategy to restrain the negative sequence components of the three — phase current on AC side under unbalanced network...
A novel simplified space-vector pulse width modulation (SVPWM) algorithm for high power three-level inverter is analyzed in this paper. The space-vector module algorithm of two-level inverter is applied to that of three-level inverter using DSP and FPGA. A 22Kw and a 1000kW three phase asynchronous motor are taken as experimental subject in lab and field respectively. The experiment results show the...
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