ECE 442 Power Electronics1 Series Resonant Inverter with Bidirectional Switch.

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Presentation transcript:

ECE 442 Power Electronics1 Series Resonant Inverter with Bidirectional Switch

ECE 442 Power Electronics2 Turn Q 1 ON at t = 0 A “resonant” pulse of current flows, charging C to V C1, Q1 turns OFF

ECE 442 Power Electronics3 C charges to V C1, Q1 turns OFF

ECE 442 Power Electronics4 C discharges via D1 and V s For t > t 1 –The capacitor acts as a voltage source –Current i o reverses, and flows via D 1 to V S

ECE 442 Power Electronics5 “Idealized Version”

ECE 442 Power Electronics6

7 Half-Bridge Series Resonant Inverter

ECE 442 Power Electronics8 Turn Q 1 ON, Resonant Pulse of current appears.

ECE 442 Power Electronics9 Turn Q 2 ON, Resonant Pulse of current appears in the opposite direction, and goes to zero.

ECE 442 Power Electronics10 Waveform Summary

ECE 442 Power Electronics11 Overlapping and Non-Overlapping modes Non-Overlapping Mode –Firing of the switching device is delayed until the last current oscillation through the diode is completed

ECE 442 Power Electronics12 Overlapping and Non-Overlapping modes Overlapping Mode –Firing of the switching device occurs before the last current oscillation through the diode is completed. –This increases the output frequency and the output power

ECE 442 Power Electronics13 MultiSim Simulation

ECE 442 Power Electronics14 Non-Overlapping Mode

ECE 442 Power Electronics15 Overlapping Mode

ECE 442 Power Electronics16 Full-Bridge Series Resonant Inverter

ECE 442 Power Electronics17 Frequency Response of Series-Resonant Inverters

ECE 442 Power Electronics18 Series-Loaded Inverter Load Resistor in series with L and C

ECE 442 Power Electronics19

ECE 442 Power Electronics20

ECE 442 Power Electronics21 Frequency Response

ECE 442 Power Electronics22 Parallel-Loaded Case

ECE 442 Power Electronics23

ECE 442 Power Electronics24

ECE 442 Power Electronics25 Frequency Response

ECE 442 Power Electronics26 Series-Parallel Loaded Case

ECE 442 Power Electronics27 Frequency Response