A New Kind Of High Density Of Soft Switch Power Converter Research Of Based On MERS

Power Electronics Technology is one of the most widely used technology in the 21st century,in recent years,with the rapid development of power electronics technology,power converters which have small size,high efficiency,good stability are widely studied,applied and will become the mainstream of development.The current demand for power converter increasingly tend to be miniaturization,lightweight,and high frequency.High-frequency switching power supply not only reduce the size,increase the power density and cost performance of the power converter,but also greatly enhances the transient response speed.However,increasing the switching frequency has brought new problems such as switching losses,electromagnetic interference and switching stress.To solve these problems,soft-switching technology has been proposed and has been widely concerned.On the basis of realizing the high frequency,using the soft-switching control technology,not only can achieve power converters's miniaturization and weight reduction,but also can reduce the switching loss of the device and improve its reliability,it has become the development trend of power electronic power conversion technology at present.For the problem of traditional step-up DC/AC power converter such as large volume and higher loss,this paper proposes a high-density boost DC/AC power converter topology based on one kind of MERS.And conventional boost DC/AC power converter circuit is different from the circuit in DC/AC DC side using a small capacitor,allowing the capacitor voltage fluctuations.Then,the mechanism of its work has been described in detail which use resonant capacitance and inductance to achieve soft switch and present reasonably soft switching control strategy.Secondly,established the corresponding model in PSIM simulation environment,the simulation results showed the feasibility of the proposed topology and the corresponding control strategy.At the same time build on MERS Boost DC/AC power converter topologies prototype platform to verify the effectiveness of the control strategy.Finally,the paper summarized and put forward some possible future research directions.