Rearch on the Control System for a Boost Circuit of a Dedicated Power Supply

With the development of science and technology, the demand for customized power supplies is increasing. The interleaved DC converters can meet the demands of high current and low ripple, and are widely used in industrial field. In order to meet the special requirements of a dedicated power supply, a triple interleaved Boost converter is adopted. In order to design the control system, a small signal model is established by using the state space average method, and the transfer function of the converter is obtained. The PI control strategy of voltage and current double closed loop is adopted to improve the dynamic response. Aiming at solving the problem that the inductance value varies greatly under actual working conditions, the control strategy of variable PI parameters is designed. Simulation and experimental results show that this strategy can meet the needs of actual load and the system is stable.