Abstract: With the development of power electronics technology, many occasions require high-power and high-current DC power supplies. The DC fast-regulating power supply used in EAST's magnetically constrained nuclear fusion device is a high-power DC power supply. Its technical requirements are: voltage response time 1ms peak voltage 50V; maximum current 20kA, can achieve 4 quadrant operation. In response to this requirement, power parallel technology is inevitably required, that is, power pipes are connected in parallel or power supply devices are connected in parallel. For the 20kA DC power supply, if the power tube IGBTs are connected in parallel, each bridge arm needs at least 15 power tubes in parallel, which not only brings great difficulty to the drive, but also, in general, the power tube with larger current capacity. The voltage capacity is also large, and in the case where the actual voltage is only 50V, this is a great waste for the voltage capacity of the power tube. Therefore, a parallel technical idea of ​​a DC/DC power supply device using a domino structure is proposed. (For details, please download the instructions for use)
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