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In a three-level flying capacitor inverter, certain switching state sequences can cause an undesirable transient in the pole voltage. The transients constitute and error voltage which degrades harmonic performance, distorts the current and generates electromagnetic noise. This paper presents a scheme to completely eliminate these dead-time transients using a digital state machine to determine the...
This paper presents a comprehensive study of the GaN HEMT switching performance in a phase-leg configuration with special focus on the impact of different parasitic effects. Therefore, a simulation model of a double pulse test circuit with GaN devices and including parasitic elements is proposed. The causes of parasitic inductances and capacitances are discussed and their effects are analyzed. Furthermore,...
Various studies have showed that about 70 to 90% of single line to ground faults occurred on High voltage transmission lines have transient nature. This type of faults is cleared by temporary outage (by the single phase auto-reclosure). The interval between opening and reclosing of the faulted phase circuit breakers is named "Dead Time" that is varying about several hundred milliseconds...
The waveform acquire rate is an important index to judge Digital Storage Oscilloscope's data acquisition performance. This paper introduces a method to improve the waveform acquire rate of the digital oscilloscope with a parallel coprocessor framework. Firstly, the relation between waveform acquire rate and dead time and the relation between waveform acquire rate and transient signal are analyzed...
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