The driving power is one of the key devices which stabilize the operation of DC hybrid circuit breaker.Therefore

we proposed a new multiple isolated driving power system structure

and adopted full bridge LCL resonant network to maintain output current characteristic.When the high voltage cable and optical fiber were used as insulation media

multi-channel output could be achieved by the magnetic ring. Moreover

we analyzed the role of each module of multiple isolated driving power supply system structure and working process of full bridge LCL resonant converter

and designed the parameters of transformer

magnetic ring

and LCL filter. Simulation research of multiple isolated driver power supply is carried out by the Simplorer and Maxwell simulation software.The results show that the converter can obtain good constant current characteristics and more stable output. Finally

a experimental prototype of a single output 3 W

0.6 A multiple isolated drive power is built

and the feasibility and effectiveness is verified by experimental results.