The excitation circuit of permanent magnetic actuator is the key structure affecting the switching characteristics. From the analysis of its working principle and the classical mathematic model

we focused our research contents on the main variables of the excitation circuit involved in the classical model. Then

using the method of quadratic regression orthogonal design

we built and optimized model for excitation circuit of permanent magnetic actuator. Also we defined comprehensive coefficient for the excitation circuit optimization design and evaluation. The optimization results show that

as average closing speed increases

the capacitance of storage batteries can be reduced by 55%. The rate of optimization is 61%

which makes the circuit more efficient. The design parameters of the excitation circuit are tested and verified by experiment finally

which provides technical support for the development and structure optimization of the system.