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Lightning invaded over-voltage is the main cause of insulation fault of electric apparatus. To acquire the actual substation lightning invaded over-voltage, a monitoring system based on arrester valve divider is proposed in this paper. The working principle and advantages of the proposed monitoring system is analyzed firstly. And then, the actual overvoltage waveforms are presented, which are recorded...
Aiming at the problem of high peak voltage at two ends of direct current (DC) torque motor with large inductance that during the pulse width modulation (PWM) control process, the original H-bridge PWM control method, the current flow and the main reason of peak voltage have also been analyzed. Based on the analysis, a new H-bridge PWM control method has also been advanced and undertaken the contrast...
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