Power systems of existing high-power high-performance electromagnetic detection equipments are unsatisfactory: the output voltage is instable and non-adjustable and the output electric energy is of poor quality.Aiming at this problem

the authors propose a full-bridge DC-DC converter of bridge mode.The circuit is composed of an inverter circuit

a high-frequency transformer

and a high-frequency uncontrolled rectifier.By studying the operation modes and working principles of the circuit

the research proposes to use the proportion-integration-differentiation (PID) method for compensation

and designs the model for the converter.A comparative analysis shows that the converter has favorable stability

good dynamic performance

little phase margins

and small errors.In addition

the output voltage is adjustable in a large range of 0~1 000 V.Therefore

it can be used in high-power and high-voltage applications.