Abstract: A design of new biaxial solar array drive electronics is proposed according to the requirements for twomotor biaxial solar array. Based on the existing solar array drive electronics, via designing a current direction switching delay circuit, the problem that power transistor is easily short at the moment of current direction switching is solved and the safety of the circuit is ensured. The small power transistor can be used to simplify the design and realize the miniaturization. By crossing recombination between the array driving circuit and motor coil, the real isolation between the main and secondary electronics is ensured and the reliability is greatly improved.

Key words: biaxial solar array drive electronics, cross recombination, current direction switching delay, miniaturization