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Performance evaluation of a high-resolution computer based efficiency measurement system for electric vehicle (EV) traction inverter is given. First, a simulation study is carried out to determine the upper limit of the EV traction inverter efficiency curve. Then, experimental efficiency measurements are completed. In the experimental study, a 30kVA induction machine-dynamometer system is used to...
According to the complex, heavy workload and low automation of traditional dielectric loss measurement, a digital and automatic measurement system based on electronic technology and PC technology is designed. The system can work in two modes, has features such as automatic calibration and automatic range. It can achieve the functions of fast dielectric loss measurement, data storage and analysis and...
This paper provides a short review of radio frequency/microwave power amplifiers (PAs) and their critical role in a modern satellite communication system. Authorspsila original design contributions are also highlighted.
The contribution of superimposed higher harmonics to magnetic losses in electrical iron sheets was examined at power frequencies. The results show that processes of magnetization by PWM voltage excitation are similar to those by ac magnetization with a carrier frequency superimposed, and are different from those due to square-wave voltage excitation with the same amplitude and the same time duration,...
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