Download presentation
Published byMark White Modified over 9 years ago
1
CIRCUITS, DEVICES, AND APPLICATIONS Eng.Mohammed Alsumady
POWER ELECTRONICS CIRCUITS, DEVICES, AND APPLICATIONS Eng.Mohammed Alsumady
2
Relationship of Power Electronics
4/20/2017
3
POWER ELECTRONICS TECHNOLOGY
As the technology for the power semiconductor devices and integrated circuit develops, the potential for applications of power electronics become wider. There are already many power semiconductor devices that are commercially available, however, the development in this direction is continuing. The power semiconductor devices or power electronic converter fall generally into four categories : -AC to DC Converter (Controlled Rectifier) -DC to DC Converter (DC Chopper) -AC to AC Converter (AC voltage regulator) -DC to AC Converter (Inverter) The design of power electronics converter circuits requires design the power and control circuits. The voltage and current harmonics that are generated by the power converters can be reduced or minimized with a proper choice of the control strategy.
4
Power Electronics Application
Power Electronics defined as the application of solid-state (devices) electronics for the control and conversion of electric power. Power electronics have already found an important place in modern technology and are now used in a great variety of high-power product, including heat controls, light controls, electric motor control, power supplies, vehicle propulsion system and high voltage direct current (HVDC) systems.
5
POWER ELECTRONIC SWITCHING DEVICES
1.Uncontrolled turn on and off (Power Diode) 2.Controlled turn on uncontrolled turn off (Thyristors) 3.Controlled turn on and off characteristic (Power Transistor, BJT, MOSFET, GTO, IGBT) 4.Continuous gate signal requirement (BJT, MOSFET, IGBT) 5.Pulse gate requirement (SCR(Silicon-Controlled Rectifier) , GTO) 6.Bidirectional current capability (TRIAC) 7.Undirectionalcurrent capability (SCR, GTO, BJT, MOSFET, IGBT)
6
Diagram Block of Converters
7
Diode Rectifiers. A diode rectifier circuit converts AC voltage into a fixed DC voltage. The input voltage to rectifier could be either single phase or three phase. AC to DC Converters. An AC to DC converter circuit can convert AC voltage into a DC voltage. The DC output voltage can be controlled by varying the firing angle of the thyristors. The AC input voltage could be a single phase or three phase. AC to AC Converters. This converters can convert from a fixed ac input voltage into variable AC output voltage. The output voltage is controlled by varying firing angle of TRIAC. These type converters are known as AC voltage regulators. DC to DC Converters . These converters can converte a fixed DC input voltage into variable DC voltage or vice versa. The DC output voltage is controlled by varying of duty cycle.
14
4/20/2017 14
28
Examples of Some Applications
4/20/2017
29
History of Power Electronics
4/20/2017
30
Types of Power Devices 4/20/2017
31
General Purposes Diodes
4/20/2017
32
Thyristors 4/20/2017
33
GTOs 4/20/2017
34
Power Ratings of Devices
4/20/2017
35
Ratings of Power Devices
4/20/2017
36
Devices Symbols and Characteristics
4/20/2017
37
Devices Symbols and Characteristics
4/20/2017
38
Applications of Power Devices
4/20/2017
39
Control Characteristics of Devices
4/20/2017
40
Control Characteristics of Devices
4/20/2017
41
Switching Characteristics
4/20/2017
42
Ideal Characteristics
4/20/2017
43
Voltage and Current Waveforms
4/20/2017
44
Diode Rectifiers 4/20/2017
45
Ac-dc Converter Input voltage AC to DC Converters
-Single phase, half wave AC to DC converter Input voltage Waveform of single-phase, half wave AC to DC converter α Output average voltage : rms value of Output voltage :
46
AC-DC Converter
47
4/20/2017
48
1. AC to DC Converters -Single phase, Full wave AC to DC converter
The average output voltage can be found from : 4/20/2017
49
AC to DC Converters Single phase, Full wave AC to DC converter
4/20/2017
50
3 Phase Half-Wave Uncontrolled Rectifier with Inductive Load
4/20/2017
51
3 Phase Half-Wave Uncontrolled Rectifier with Inductive Load
4/20/2017
52
4/20/2017
53
Three Phase Controlled Rectifier with Resistive Load
4/20/2017
54
Three Phase Controlled Rectifier with Inductive Load
4/20/2017
55
3 Phase Half-Wave Controlled Rectifier With Inductive Load
4/20/2017
56
4/20/2017 AC to DC Converters -Three-phase, Half wave AC to DC converter with inductive load If the phase voltage is : van= Vm Sin(wt). The average output voltage for a continuous load current is : 4/20/2017
57
4/20/2017
58
AC to DC Converters -Three-phase, Half wave AC to DC converter
4/20/2017
59
4/20/2017
60
4/20/2017
61
4/20/2017
62
4/20/2017
63
4/20/2017
64
4/20/2017
65
4/20/2017
66
4/20/2017
67
4/20/2017
68
4/20/2017
69
4/20/2017
70
4/20/2017 4/20/2017
71
4/20/2017
72
4/20/2017
73
4/20/2017
74
4/20/2017
75
4/20/2017
76
4/20/2017
77
4/20/2017
78
4/20/2017
79
4/20/2017
80
4/20/2017
81
4/20/2017
82
4/20/2017
83
4/20/2017
84
4/20/2017
85
4/20/2017
86
AC-AC Converter 4/20/2017
87
IGBT in DC-DC Converter
4/20/2017
88
DC-AC Converter 4/20/2017
89
UPS System 4/20/2017
90
RMS Values of Waveforms
4/20/2017
91
RMS Values of Waveforms
4/20/2017
92
Power Converter System
4/20/2017
93
Drive System 4/20/2017
94
Smart Power System 4/20/2017
95
Summary Power electronics uses low power electronics (ICs, microprocessors, controllers ), and switching power devices for power converter and/or processing from one form of power to another. The characteristics of the power devices play a major role in the speed and effectiveness of the power conversion. 4/20/2017
Similar presentations
© 2024 SlidePlayer.com Inc.
All rights reserved.