Quasi Current Mode Control for the Phase-Shifted

Series Resonant Converter

ABSTRACT:

A novel indirect current mode control is applied in the phase-shifted series resonant converter system. The current is generated from resonant tank vector and the resonant current is regulated indirectly through quasi current mode control and thus the dynamic performance of the converter system is improved. Only single voltage feedback is required for the system. The proposed system consists of two control loops with one inner resonant vector and one outer voltage loop. Analysis and practical experiments are carried out and the results show the better performance compared with that of the conventional control.

KEYWORDS:

1.      Dynamic performance

2.      Dynamic response

3.      Phase shifted series resonant converter (PSRC)

4.       Quasi current mode control.

SOFTWARE: MATLAB/SIMULINK

CIRCUIT DIAGRAM:

BLOCK DIAGRAM:

EXPECTED SIMULATION RESULTS:

CONCLUSION:

The proposed control method based on the indirectly regulation of the resonant current is applied to the phase-shifted resonant converter. Only single voltage feedback is needed and it is converted to resonant tank vector components. Thus the output voltage is controlled more effectively and the dynamic performance is improved. Better performance has been verified through system analysis and experiments. In addition, the construction of the reformed control system is simple because only single voltage sensor is required. No current sensor is needed and the reformed control is monitored internally through quasi current vector.

REFERENCES:

[1] D. M. Sable and F. C. Lee, “The operation of a full bridge, zero voltage switched PWM converter,” in Proc. Virginia Power Electron. Ctr. Sem., 1989, pp. 92–97.

[2] A. J. Forsyth, P. D. Evans, M. R. D. Al-Mothafar, and K. W. E. Cheng, “A comparison of phase-shift controlled resonant and square-wave converters for high power ion engine control,” in Proc. Eur. Space Power Conf., 1991, pp. 179–185.

[3] H. L. Chan, K. W. E. Cheng, and D. Sutanto, “Phase-shift controlled DC-DC converter with bi-directional power flow,” Proc. Inst. Elect. Eng., vol. 148, no. 2, pp. 193–201, Mar. 2001.

[4] A. J. Forsyth, P. D. Evans, K. W. E. Cheng, and M. R. D. Al-Mothafar, “Operating limits of power converters for high power ion engine control,” in Proc. 22nd Int. Elect. Propul. Conf., 1991, [CD ROM].

[5] R. L. Steigerwald, “A comparison of half-bridge resonant converter topologies,” IEEE Trans. Power Electron., vol. PE-3, no. 2, pp. 174–182, Apr. 1988.