To solve the problem that too many isolation transformers are required for power electronic switch at high voltage level
leading to excessive scale of traditional multi-channel power supply system
a new type of multiple output isolation power supply system is proposed
in which a novel circuit topology is designed based on transformer loose coupling technology. The calculation formula of the parameters is derived
and the key parameters are selected and optimized. The experimental verification is carried out on a series IGBT power electronic switching circuit which needs 20-way output power supplies. The experimental results show that: in the case of full load
the output voltage of the power supply circuit is stable at 18 V
and the system can stably supply power for the 20-way power electronic switches. The system realizes the high voltage isolation in reduced volume and space
and the isolated voltage reaches DC 30 kV. The system can be extended to more power electronic switches in series.
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