Analysis and evaluation of a lossless turn-on snubber

A lossless turn-on snubber was studied analytically, by simulation and experimentally. Limits were found for the proper operation of the snubber and are expressed as permissible duty cycle as a function of input current. It was found that a modified version of the snubber, which includes a tapped main inductor, improves the performance by allowing a wider operational range. The experimental results confirm the theoretical analysis. A reduction of power losses of about 19 W was observed when the snubber was implemented in a 1 kW boost power converter.

[1]  E.A.A. Coelho,et al.  PWM soft-switched converters using a single active switch , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[2]  G. Ivensky,et al.  Optimization of the auxiliary switch components in a flying capacitor ZVS PWM converters , 1995, Eighteenth Convention of Electrical and Electronics Engineers in Israel.

[3]  E.A.A. Coelho,et al.  A family of PWM soft-switching converters with low stresses of voltage and current , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[4]  K. M. Smith,et al.  A comparison of voltage mode soft switching methods for PWM converters , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[5]  G. Ivensky,et al.  Optimization of the auxiliary switch components in a flying capacitor ZVS PWM converters , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[6]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[7]  G. Ivensky,et al.  A soft switcher optimized for IGBTs in PWM topologies , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.