This paper mainly studies the theoretical technology and application of new power electronic devices, power transformation and control, power source, power transmission and automation. It is an interdisciplinary subject that integrates the new achievements of electric energy transformation, electromagnetics, automatic control, microelectronics, electronic information, computer and other technologies, and has a wide range of influence and great role in the development of electrical engineering and social progress. This subject requires high practical ability and is difficult. Undergraduate is electrical engineering, automation, electronic information engineering suitable for this major.<br>
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