Exploring Boost ZVS Topologies in Power Electronics II
Delve into the world of Boost ZVS topologies in Power Electronics II with a focus on M-Type Boost ZVS, identification of valid L-Type ZVS Boost converter, circuit behavior analysis, and achieving ZVS across the main switch.
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Presentation Transcript
Lecture 6B EEL 646 POWER ELECTRONICS II Exploring Boost ZVS Topologies
M-Type Boost ZVS Topology vc(t) resonates with L to make the voltage across the main switch reach zero.
Consider the following five different possible topologies. Identify which one is the valid L-Type ZVS Boost converter
Achieving ZVS is not possible across the main switch given LC tank dynamic behavior
Topology 2 Assume S is closes, then D is either on or off. By inspection, D is open since vd= -Vo. The current iL will keep decreasing since vL= -Vo. The switch current equals Iin. And the circuit will not be stable
Topology 2 Depending on the value of vc, the diode can be on or off. If vc > Vo , D is on, then vc= Vo and vL=0. The switch will never close at ZV. If vc < Vo , D is off, then vc and iL will resonate not possible to achieve ZVS before turning the main switch on.
