This document describes LTspice simulations of a 50W flyback converter circuit using different input voltages. It includes the circuit schematic, input and output waveforms, power output, and gate drive timing for input voltages of 85Vac, 110Vac and 265Vac. It also provides more detailed waveforms and analysis for an example simulation with 110Vac input, examining the transformer operation, MOSFET switching, and feedback circuit. Specifications and simulation settings are provided in appendices.
The project is designed to control the speed of a single phase induction motor in three steps by using cyclo convertor technique by thyristors. A.C. motors have the great advantages of being relatively inexpensive and very reliable.
The project is designed to control the speed of a single phase induction motor in three steps by using cyclo convertor technique by thyristors. A.C. motors have the great advantages of being relatively inexpensive and very reliable.
Part of Lecture series on EE321N, Power Electronics-I delivered by me during Fifth Semester of B.Tech. Electrical Engg., 2012
Z H College of Engg. & Technology, Aligarh Muslim University, Aligarh
Please comment and feel free to ask anything related. Thanks!
This ppt gives the basic idea about multilevel inverter.this ppt includes
1.Introduction
2.Advantages of multilevel inverters
3.Types of multilevel inverters
4.Working of multilevel inverters
5.Applications.
Tutorial on Distance and Over Current ProtectionSARAVANAN A
Contents
• Protection Philosophy of ERPC
• Computation of Distance Relay Setting
• System Study to Understand Distance Relay
Behaviour
• DOC and DEF for EHV system
Switching characteristics of power electronic devicesSunny Purani
the characteristics of power electronic devices in one touch.
only image files are there & the detailed explanations of these are given in different slide shares.
Part of Lecture series on EE321N, Power Electronics-I delivered by me during Fifth Semester of B.Tech. Electrical Engg., 2012
Z H College of Engg. & Technology, Aligarh Muslim University, Aligarh
Please comment and feel free to ask anything related. Thanks!
This ppt gives the basic idea about multilevel inverter.this ppt includes
1.Introduction
2.Advantages of multilevel inverters
3.Types of multilevel inverters
4.Working of multilevel inverters
5.Applications.
Tutorial on Distance and Over Current ProtectionSARAVANAN A
Contents
• Protection Philosophy of ERPC
• Computation of Distance Relay Setting
• System Study to Understand Distance Relay
Behaviour
• DOC and DEF for EHV system
Switching characteristics of power electronic devicesSunny Purani
the characteristics of power electronic devices in one touch.
only image files are there & the detailed explanations of these are given in different slide shares.
SPICE MODEL of TPC8119 (Standard+BDS Model) in SPICE PARKTsuyoshi Horigome
SPICE MODEL of TPC8119 (Standard+BDS) in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.
2. Contents
1. 50W Off-Line Adapter Circuit (VIN=85Vac)
1.1) Input Waveform
1.2) Output Waveform
1.3) Output Power
1.4) Gate Drive Output and Oscillator Timing (IC)
2. 50W Off-Line Adapter Circuit (VIN=110Vac)
2.1) Input Waveform
2.2) Output Waveform
2.3) Output Power
2.4) Gate Drive Output and Oscillator Timing (IC)
3. 50W Off-Line Adapter Circuit (VIN=265Vac)
3.1) Input Waveform
3.2) Output Waveform
3.3) Output Power
3.4) Gate Drive Output and Oscillator Timing (IC)
4. Transformer Specification
5. Operation Waveform (VIN=110Vac, Example)
5.1) Transformer Turn Ratio
5.2) Transformer Primary Side Inductance (LP)
5.3) VCC Output Waveform
5.4) MOSFET Switching Device (UQ101)
5.5) Output Rectifier Diode (D201 - D202)
5.6) Current Sensing and Feedback Circuit
Conclusion
Simulation Details
Appendix A - Initial Condition Settings
Appendix B - Bill of Materials
Simulation Index
2Copyright (C) Siam Bee Technologies 2015
3. 1. 50W Off-Line Adapter Circuit (VIN=85Vac)
- Simulation Circuit
3Copyright (C) Siam Bee Technologies 2015
.tran 0 50m 0 10n
.Option Gmin=75E-9
.Option Abstol=1.0E-9
.Option Vntol=1.0u
.Option Trtol=1000
.Option Method=Gear
* Engine Solver: Alternate
Initial condition are set ,so the simulation starts near the steady state.
VIN=85Vac
V(Out) starts from 11V
by the initial condition
V(Vcc) starts from 12V
4. 1.1) Input Waveform
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 4
Time [sec]
VDC,AVG = 104.33V
VAC = 85Vrms
VDC, MIN = 85.8V
5. 1.2) Output Waveform
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 5
The output voltage is regulated at 12.12V
Time [sec]
The output current is 4.04A (RL=3)
V(Out) starts from 11V
by the initial condition
6. 1.3) Output Power
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 6
Time [sec]
The simulation result shows the output power is 48.90W
7. 1.4) Gate Drive Output and Oscillator Timing (IC)
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 7
Time [sec]
VOSC
Oscillator frequency = 105kHz
PW = 3.877us
8. 2. 50W Off-Line Adapter Circuit (VIN=110Vac)
- Simulation Circuit
8Copyright (C) Siam Bee Technologies 2015
.tran 0 50m 0 10n
.Option Gmin=75E-9
.Option Abstol=1.0E-9
.Option Vntol=1.0u
.Option Trtol=1000
.Option Method=Gear
* Engine Solver: Alternate
Initial condition are set ,so the simulation starts near the steady state.
VIN=110Vac
V(Vcc) starts from 12V
V(Out) starts from 11V
by the initial condition
9. 2.1) Input Waveform
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 9
Time [sec]
VDC,AVG = 142.41V
VAC = 110Vrms
VDC, MIN = 128.621V
10. 2.2) Output Waveform
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 10
The output voltage is regulated at 12.118V
Time [sec]
The output current is 4.039A (RL=3)
V(Out) starts from 11V
by the initial condition
11. 2.3) Output Power
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 11
Time [sec]
The simulation result shows the output power is 48.95W
12. 2.4) Gate Drive Output and Oscillator Timing (IC)
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 12
Time [sec]
PW = 3.282us
VOSC
Oscillator frequency = 105kHz
13. 3. 50W Off-Line Adapter Circuit (VIN=265Vac)
- Simulation Circuit
13Copyright (C) Siam Bee Technologies 2015
.tran 0 50m 0 10n
.Option Gmin=75E-9
.Option Abstol=1.0E-9
.Option Vntol=1.0u
.Option Trtol=1000
.Option Method=Gear
* Engine Solver: Alternate
Initial condition are set ,so the simulation starts near the steady state.
VIN=265Vac
V(Vcc) starts from 12V
V(Out) starts from 11V
by the initial condition
14. 3.1) Input Waveform
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 14
Time [sec]
VDC,AVG = 367.58V
VAC = 265Vrms
VDC, MIN = 361.264V
15. 3.2) Output Waveform
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 15
The output voltage is regulated at 12.075V
Time [sec]
The output current is 4.025A (RL=3)
V(Out) starts from 11V
by the initial condition
16. 3.3) Output Power
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 16
Time [sec]
The simulation result shows the output power is 48.70W
17. 3.4) Gate Drive Output and Oscillator Timing (IC)
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 17
Time [sec]
PW = 1.706us
VOSC
Oscillator frequency = 105kHz
18. 4. Transformer Specification
Copyright (C) Siam Bee Technologies 2015 18
NP NS
NSUB
Pin (S--F) Turns
NP 1 → 3 54
NS 9 → 12 10
NSUB 5 → 6 10
Winding Specification
Pin Value
Inductance 1 - 3 600uH
Leakage 1 - 3 15uH
Electrical Specification
To model the transformer (or coupled inductors), we can use the SPICE primitive k,
which describes the coupling ratio between a primary and a secondary.
19. 5. Operation Waveform (VIN=110Vac, Example)
- Simulation Circuit
19Copyright (C) Siam Bee Technologies 2015
+
VDS
-
ID
- +
VKA
IF
The system parameter are as follows:
- Maximum output power : 50W
- Input voltage : 110Vrms
- AC line frequency : 50Hz
- Switching frequency : 100kHz
VIN=110Vac
+
VCC
-
V(Out) starts from 11V
V(Vcc) starts from 12V
20. 5.1) Transformer Turn Ratio
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 20
Time [sec]
VP
VS
VCC
This figure shows the waveforms of the voltages at each side of the transformer.
21. This figure shows the waveforms of ID(UQ101) and IF(D201, D202) in the CCM mode.
The primary-side inductance (LP) of the transformer determines the converter operation mode.
5.2) Transformer Primary Side Inductance (LP)
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 21
Time [sec]
ΟNΤ
Τ
IF(D201, D202)
VPWM
ID(UQ101)
22. 5.3) VCC Output Waveform
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 22
Time [sec]
VCC = 12.367V
23. 5.4) MOSFET Switching Device (UQ101)
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 23
Time [sec]
VDS(t)
ID(t)
Switching
loss (turn-off)
Switching loss
(turn-on)
Conduction loss
(VDS x ID)
24. 5.5) Output Rectifier Diode (D201 - D202)
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 24
Time [sec]
VKA(t) IF(t)
Peak magnitude
current
Conduction loss
(VF,AK x IF)
PLOSS_(D201, 202) (t)
25. 5.6) Current Sensing and Feedback Circuit
- Simulation Result
Copyright (C) Siam Bee Technologies 2015 25
Time [sec]
1V Comparator
VCS
26. Conclusion
Copyright (C) Siam Bee Technologies 2015 26
Input voltage Output power Oscillator frequency PW
85Vac 48.95 W 105 kHz 3.877 us
110Vac 48.95 W 105 kHz 3.278 us
265Vac 48.70 W 105 kHz 1.706 us
Simulation Results