Electronics Science Technology and Application

Journal Updates: Research on Boost Soft-switching Converter

In order to improve the circuit working efficiency of zero-voltage zero-current transition Boost converter, an improved modulation strategy was proposed. The main switch can only achieve zero-current turn-on under traditional modulation strategy. However, the change to the turn-on time of main switch and the turn-off time of auxiliary switch can make the main switch achieve zero-voltage zero-current turn-on and the auxiliary switch realize zero-voltage zero-current turn-off in advance as well. 

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Whether electric appliances and electronic devices can put on the market is related to their performance, size, cost and power consumption. But transformers, inductors, and capacitors can hardly meet the need of volume and weight in practical engineering application. With the increase of switch frequency, the voltage and current cannot be zero at the same time, leading to generate overlapping region, when the switch is turned on(or turned off). The introduction of soft-switching technology can eliminate the power loss of switch completely by adding small inductors, capacitors and other components in the circuit, whose principle is the resonance between the inductor and capacitor.

Zero transition PWM circuit, including zero-current transition PWM circuit and zero-voltage transition PWM circuit, is applied extensively in different circuits.


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