Research On High Gain Boost Converter With Bridge Type Voltage Doubler Rectifier

Over time,with the rapid economic development of the world today,the consumption of non-renewable energy is too fast,both the earth’s climate and ecological environment are in danger,and countries around the world have paid great attention to this and proposed low-carbon development to slow down the consumption of non-renewable energy and are also actively looking for alternatives to non-renewable energy.The endless solar energy,wind energy and fuel cell clean energy power generation has become the main development direction,but because the output voltage of these new energy sources cannot reach the voltage grade required for inverting and grid connection,the low DC output voltage needs to be boosted by a high gain Boost converter,therefore,it is especially critical to study the high performance high gain Boost converter.The paper summarizes the current academic high gain Boost converter application technology and research status.The key point is to combine the bridge type pressure doubling unit with a diode-capacitor passive clamping branch to absorb the leakage inductance of the primary winding of the coupled inductor and to use this energy to avoid the waste of resources.At the same time,it solves the problem of switching tube voltage spikes.In order to reduce the problem of large current ripple on the primary side of the coupled inductor of the bridge type pressure doubling unit with single primary and single secondary high gain Boost converter,the interleaved parallel technique is introduced to propose a bridge multiplier unit with dual primary and single secondary high gain Boost converter,which differs from the bridge type pressure doubling unit with single primary and single secondary high gain Boost converter in that the output diode is replaced by an active switching tube to To solve the problem of no release loop of the coupled inductor primary winding leakage inductance energy caused by switching tube voltage spikes,but also on the basis of the original by adding a new set of primary winding and switching tube on the coupled inductor using staggered parallel technology to make two sets of coupled inductor primary parallel,the switch duty cycle required to obtain high gain is smaller,coupled inductor double primary charging and discharging time is shortened so as to reduce the size of the current ripple.In order to further improve the voltage gain,based on the double-primary single-sided Boost converter with bridge type pressure doubling unit,a double-primary double-sided high-gain Boost converter with bridge type pressure doubling unit is proposed,in which a bridge type pressure doubling unit is added to the coupled inductor and the two bridge multiplier units are recombined to save a diode and a capacitor,and the two primary windings are charged and discharged in parallel to reduce the current ripple size.The two primary windings are charged and discharged in parallel while the two secondary windings are charged and discharged in series not only retaining the advantages of the dual primary and single secondary high gain Boost converter with bridge type pressure doubling unit but also further improving the voltage gain.In this paper,the operation and performance characteristics of three high-gain Boost converters with bridge type pressure doubling units are analyzed in detail,The latter two converters are discussed in an extended manner.The corresponding experimental verification of the three converters is carried out by building converters through the experimental platform respectively,and the experimental results confirm the feasibility and rationality of the three converters.