EEL 5245 POWER ELECTRONICS I Lecture #8: Chapter 3 …fpec.ucf.edu/teaching/EEL 5245...
Transcript of EEL 5245 POWER ELECTRONICS I Lecture #8: Chapter 3 …fpec.ucf.edu/teaching/EEL 5245...
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EEL 5245 POWER ELECTRONICS I
Lecture #8: Chapter 3 Diode/SCR Switching Circuits-AC
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Objectives
• Emphasize mode-by-mode analysis • Simulating Ideal Elements • Introduce Load Regulation • Introduce Current Commutation • Introduce Concepts of Steady State/Transient • Present Current Freewheeling • Define Inductor Current Ripple • Inductor Voltage Average Value is Zero (Steady State) • Half Wave Inductive Rectifiers w/ and w/out Freewheeling Diode • Derivation of Full Bridge w/ Cap. Load
– Introduce Output Voltage Ripple – MathCAD usage
• SCR Switching Circuits – Current Freewheeling
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Half Wave Rectifier w/ Inductive Load
Time0s 5ms 10ms 15msV(Vs:+) V(Vload) I(L1)
-100
0
100
Time
8.00ms 9.00ms 10.00ms7.20ms 10.88msV(Vs:+) V(Vload) I(L1) 0
-40
-20
-0
20
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Half Wave Rectifier w/ Inductive Load
Time
0s 5ms 10ms 15msI(R1) V(Vload) V(Vs:+)
-100
0
100
Time
8.00ms 10.00ms 12.00ms13.55msI(R1) V(Vload) V(Vs:+) 0
-50
0
-82
26
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Half Wave Rectifier w/ Inductive LoadVoavg
Time
0s 5ms 10ms 15msI(R1) V(Vload) V(Vs:+)
-100
0
100
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Half Wave Rectifier w/ Inductive Loadand Freewheeling Diode
Time
0s 5ms 10ms 15msI(R1) V(Vload) V(Vs:+)
-100
0
100
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Half Wave Rectifier w/ Inductive Loadand Freewheeling Diode
Time
0s 5ms 10ms 15msI(R1) V(Vload) V(Vs:+)
-100
0
100
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Half Wave Rectifier w/ Inductive Loadand Freewheeling Diode
Time
130ms 140ms 150ms 160msI(R1) V(Vload) V(Vs:+)
-100
0
100Time
0s 50ms 100ms 150msI(R1) V(Vload) V(Vs:+)
-100
0
100
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Half Wave Rectifier w/ Inductive Loadand Freewheeling Diode
Time
140.0ms 150.0ms 160.0ms133.3msavg(V(R1:2,L1:2))
-50V
0V
50VI(R1) V(R1:2,L1:2)
-100
0
100
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Half Wave Rectifier w/ Inductive Loadand Freewheeling Diode
Time
130ms 140ms 150ms 160ms 170msI(L1) V(Vs:+)
-100
0
100
Time
140ms 150ms 160ms133ms 167msI(L1) V(Vs:+) -I(Vs)
-100
0
100
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Full Wave Rectifier w/ Output Cap
Time
85ms 90ms 95ms 100msV(S1:4) V(ABS1:OUT)
0V
100V150V
avg(V(S1:4))160.0V
162.5V
165.0V
Time
85ms 90ms 95ms 100msV(S1:4) V(ABS1:OUT)
150.0V
160.0V
170.0V
178.5V
Time
85.0ms 90.0ms 95.0ms 99.9msV(ABS1:OUT) V(S1:4)
0V
100V
150V
I(ABS1)-1.0A
0A
1.0A
2.0A
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Phase-Controlled Half WaveRectifier w/ Inductive Load
Time
0s 5ms 10ms 15msV(Vload) I(R_Isense) I(L1) V(Vs:+)
-100
0
100
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