Lecture 23a ac_ac

Lecture 23a ac_ac - Lecture 23a AC-AC power conversion...

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Unformatted text preview: Lecture 23a AC-AC power conversion AC-AC converters • Extension of dc-dc converters for direct ac-ac conversion • only voltage magnitude control (same frequency) • extension of isolated and non-isolated dc-dc topologies • pplications in power conditioners and voltage regulators applications in power conditioners and voltage regulators • Matrix converters an control magnitude frequency and power factor • can control magnitude, frequency and power factor • Cyclo converters • frequency conversion • ulti- tage converters (ac- c, dc- c, dc- c) Multi stage converters (ac dc, dc dc, dc ac) Switch-mode Power Conditioners (AC buck converter) in V out V pwm V 1 0 0 V 1 5 0 V wm V 0 V pwm T i m e 0 s 2 m s 4 m s 6 m s 8 m s 1 0 m s 1 2 m s 1 4 m s 1 6 m s V ( R 1 : 1 )- 1 0 0 V- 1 5 0 V Can also be used to obtain controllable ac output – ex: lighting dimmers AC-AC boost converter S2 L1 Bi-directional and bi-polar switches V1 FREQ = 60 VAMPL = 170 VOFF = 0 G1 + 1m G1_bar R1 C1 + S1 200uH 1 2 34 22uF 1m G1 1-V(%IN) G1_bar V3 TD = 0 TF = 10n PW = 25us PER = 50us V1 = 0 TR = 10n V2 = 1 00 AC-AC boost converter waveforms 200V 400V v o v 400 V-200V 0V in Time 50ms 55ms 60ms 65ms 70ms 75ms 80ms 85ms 90ms 95ms 100ms V(V1:+) V(R1:1)-400V 400 V 4 0 i i 40 A 2 0 in o i in- 2 0 T i m e 5 0 m s 5 5 m s 6 0 m s 6 5 m s...
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This note was uploaded on 05/25/2011 for the course EE 472 taught by Professor Ayynar during the Spring '11 term at ASU.

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Lecture 23a ac_ac - Lecture 23a AC-AC power conversion...

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