2015 elec ch2補充
Post on 29-Jan-2016
238 views
DESCRIPTION
ele engineeringTRANSCRIPT
![Page 1: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/1.jpg)
Figure 11–11(a) Graphical illustration of relay hysteresis. As current is increasing, the switching occurs
when the pull-in value is reached. As current is decreasing, the switching occurs when the drop-out value is reached. (b) The essential parts of an electromagnet relay. Hysteresis is due to p g y y
the gap between the armature and the magnet core.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 2: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/2.jpg)
Figure 1–2A relay logic circuit in which the relay coil is controlled by input devices, namely a limit switch and a pressure switch.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 3: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/3.jpg)
Figure 1–3A relay logic circuit in which relay coils are controlled by the contacts of other relays.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 4: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/4.jpg)
Figure 1–4(a) Physical layout of a conveyor/classifying system. (b) Top view of the diverting zone, showing the positions of the four diverting gates and the four chute limit switches.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 5: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/5.jpg)
Figure 1–5Control circuitry for the conveyor/classifying system, with the logic performed by magnetic relays.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 6: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/6.jpg)
Figure 1–6(a) The AND logic function performed by relay circuitry and by solid-state circuitry. (b) The OR function performed by relay circuitry and by solid-state circuitry.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 7: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/7.jpg)
Figure 1–7Schematic symbols of the five basic logic gates. A NOT gate is often called an inverter.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 8: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/8.jpg)
Figure 1–8Control circuitry for the conveyor/classifying system of Fig. 1–4, with the logic performed by solid-state logic gates.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 9: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/9.jpg)
![Page 10: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/10.jpg)
![Page 11: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/11.jpg)
Figure 1–13Output amplifiers for amplifying low-power logic signals into high-power output signals.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 12: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/12.jpg)
Figure 1–14(a) Output amplifier using a power transistor to control the current through the output device. (b) Output amplifier using a relay contact to control the current through the output device.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 13: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/13.jpg)
Figure 1–14(a) Output amplifier using a power transistor to control the current through the output device. (b) Output amplifier using a relay contact to control the current through the output device.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 14: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/14.jpg)
Figure 2–19(a) Simple relay circuit with a time-delay contact. (b) Motor power circuit associated with the relay control circuit in part (a).
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved
![Page 15: 2015 Elec Ch2補充](https://reader034.vdocuments.net/reader034/viewer/2022050809/5695d1041a28ab9b0294ce9e/html5/thumbnails/15.jpg)
Figure 2–20(a) Physical layout of a wagon being filled from a hopper. (b) Simple relay control circuit, illustrating the use of a time-delay contact to allow the powder to drain out of the supply tube into the wagon before the wagon is moved.
Timothy J. MaloneyModern Industrial Electronics, Fourth Edition
Copyright ©2001 by Pearson Education, Inc.
Upper Saddle River, New Jersey 07458All rights reserved