No abstract

The efficiency is affected by the parameters of components in the DC high current generator. The leakage inductance of the rectifier transformer will affect the output and filtering effect of the device and reduce the power quality of the public network. To improve the output and filtering effect of the DC high current generator, the 3-phase 6-pulsation rectifier bridge arm with the transformer T-type equivalent circuit is proposed. Through the topology model of each conduction state circuit of the semiconductor components, the expressions of load output, high-order harmonic content, and transformer leakage inductance are calculated. Then the actual generator is simulated in the MATLAB-Simulink module and variation law between the primary and secondary side leakage inductance and the output DC voltage, the total harmonic distortion(THD), and the fifth harmonic content rate is obtained. Finally, the output waveform is analyzed under the rated condition. The results show that the influence of transformer leakage inductance on output efficiency and high order harmonic filtering effect can be obtained by the proposed calculation method, and the simulation results verify the validity and correctness of the theoretical analysis.