Figure 16.1 Switched load control

Figure 16.1 Switched load control
Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean

Figure 16.2 Rheostat load control

Figure 16.3 Variac power control

Figure 16.4 Tapped inductor power control

Figure 16.5 Thyristor power control

Figure 16.6 Phase control load voltage waveforms

Figure 16.7(a) Load waveforms for zero voltage switching

Figure 16.7(b) Load waveforms for zero voltage switching
8 Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean

Figure 16.7(c) Load waveforms for zero voltage switching

Figure 16.8 SCR standard symbol

Figure SCR case styles 11 Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean

Figure 16.10 SCR layer construction

Figure SCR operation 13 Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean

Figure 16.12 SCR forward and reverse characteristics

Figure 16.13 Effect of gate current on SCR break-over voltage

Figure 16.14 Typical SCR gate current pulse

Figure SCR protection 17 Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean

Figure SCR testing 18 Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean

Figure 16.17 GTO thyristor symbol

Figure 16.18(a) GTO thyristor turn-on and turn-off currents

Figure 16.18(b) GTO thyristor turn-on and turn-off currents

Figure 16.19 GTO thyristor characteristics

Figure 16.20 Control of a.c. power—inverse parallel SCRs

Figure 16.21 Triac layer construction and circuit symbol

Figure 16.22(a,b) Triac triggering modes

Figure 16.22(c,d) Triac triggering modes

Figure 16.23 Triac characteristics

Figure 16.24 Triac protection

Figure 16. 25(a,b) Triac testing
Figure 16.25(a,b) Triac testing. Note that the triac will attempt to conduct more readily when a voltage exists between MT1 and the gate 29 Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean

Figure 16. 25(c,d) Triac testing
Figure 16.25(c,d) Triac testing. Note that the triac will attempt to conduct more readily when a voltage exists between MT1 and the gate 30 Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean

Figure 16. 25(e,f) Triac testing
Figure 16.25(e,f) Triac testing. Note that the triac will attempt to conduct more readily when a voltage exists between MT1 and the gate 31 Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean

Figure 16.26 UJT construction and symbol

Figure 16.27 UJT internal voltage drops

Figure 16.28 UJT emitter current

Figure 16.29 UJT emitter characteristic

Figure 16.30 UJT relaxation oscillator

Figure 16.31 Relaxation oscillator waveforms

Figure 16.32 PUT construction and symbol

Figure 16.33 PUT biasing and current flow

Figure 16.34 PUT anode characteristic

Figure 16.35 PUT relaxation oscillator

Figure 16.36 PUT oscillator waveform

Figure 16.37 Diac graphical symbol

Figure 16.38 Diac characteristics (symmetrical diac)

Figure 16.39 Diac trigger circuit

Figure 16.40 Diac trigger circuit waveforms

Figure 16.41(a) Voltage waveforms for a d.c. load with phase control

Figure 16.41(b) Voltage waveforms for a d.c. load with phase control

Figure 16.42(a) Voltage waveforms for an a.c. load with phase control

Figure 16.42(b) Voltage waveforms for an a.c. load with phase control

Figure 16.43 RFI suppression

Figure 16.44 Single-phase half-wave controlled rectifier

Figure 16.45 Single-phase half-wave controlled rectifier waveforms (a = 60°)

Figure 16.46 Single-phase half-controlled bridge rectifier

Figure 16.47 Single-phase half-controlled bridge—modified trigger circuit

Figure 16.48 Single-phase half-controlled bridge waveforms (a = 60°)

Figure 16.49 Triac control of a.c. loads

Figure 16.50 Triac control of a.c. loads—reduced snap-on effect

Figure 16.51 Triac load control—UJT triggering

Figure 16.52 Alternating current controller circuit characteristic

Figure 16.53 Triac a.c. load controller— diac triggering (trigger angle 45°)

Figure 16.54 Triac a.c. load controller— UJT triggering (trigger angle 90°)

Figure 16.55 Inverse parallel SCR load control—UJT triggering

Figure 16.56(a) Zero voltage switching load voltage waveforms

Figure 16.56(b) Zero voltage switching load voltage waveforms

Figure 16.56(c) Zero voltage switching load voltage waveforms

Figure 16.57 Integrated circuit zero-crossing switch

Figure 16.58 Temperature variations—on/off control

Figure 16.59 Temperature variations—proportional control

Figure 16.60 Solid state relay load control

Figure 16.61 Rheostat load control

Figure 16.62 Thyristor power control

Figure 16.63 PUT relaxation oscillator

Figure 16.1 Switched load control

Similar presentations

Presentation on theme: "Figure 16.1 Switched load control"— Presentation transcript:

Similar presentations

About project

Feedback

Log in

Auth with social network:

Figure 16.1 Switched load control

Similar presentations

Presentation on theme: "Figure 16.1 Switched load control"— Presentation transcript:

Similar presentations

About project

Feedback