1 of 33

Figure 7--1 Electrical circuit diagram of a single-diode rectifier power supply. The waveforms show AC voltage supply and half-wave DC at the load resistor.

Thomas E. Kissell�Industrial Electronics, 3e

2 of 33

Figure 7--2 Electrical diagram of a two-diode bridge rectifier circuit. The waveforms for the AC sine wave at the input and the two half-waves at the output are also shown.

Thomas E. Kissell�Industrial Electronics, 3e

3 of 33

Figure 7--3 The electrical diagram of a four-diode full-wave bridge rectifier.

Thomas E. Kissell�Industrial Electronics, 3e

4 of 33

Figure 7--4 Electrical diagram that shows the current path of the positive and negative half-cycles of the sine wave as it is rectified through the bridge.

Thomas E. Kissell�Industrial Electronics, 3e

5 of 33

Figure 7--5 Electrical diagram of the four-diode bridge where the diodes are shown in a box formation rather than a diamond. The circuit function is exactly like the bridge shown in Fig. 7-4.

Thomas E. Kissell�Industrial Electronics, 3e

6 of 33

Figure 7--6 (a) Electrical diagram of the three-phase bridge rectifier that is connected to the secondary winding of a three-phase transformer. (b) Three-phase input sine waves. (c) Six half-waves for the DC output.

Thomas E. Kissell�Industrial Electronics, 3e

7 of 33

Figure 7--7 Electrical diagram of a three-phase double-wye rectifier with an interphase transformer. The output waveform for the rectifier is also shown.

Thomas E. Kissell�Industrial Electronics, 3e

8 of 33

Figure 7--8 Electrical diagram of a six-phase star rectifier circuit. This rectifier circuit utilizes a secondary transformer winding that has all six windings connected at a center tap.

Thomas E. Kissell�Industrial Electronics, 3e

9 of 33

Figure 7--9 (a) Electrical diagram of 12 diodes connected in parallel as a six-phase full-wave bridge rectifier. This circuit can provide larger current that exceeds the specification of each individual diode. (b) Electrical diagram of 12 diodes connected in series as a six-phase full-wave bridge rectifier that provides a voltage that exceeds the specification of each individual diode.

Thomas E. Kissell�Industrial Electronics, 3e

10 of 33

Figure 7--10 A table that shows the comparison of all of the features of three-phase power supplies. (Copyright of Motorola. Used by Permission.)

Thomas E. Kissell�Industrial Electronics, 3e

11 of 33

Figure 7--11 Electronic circuit that shows a capacitor connected in parallel and an inductor connected in series with the DC output part of the rectifier circuit. (Copyright of Motorola. Used by Permission.)

Thomas E. Kissell�Industrial Electronics, 3e

12 of 33

Figure 7--12 (a) Electrical diagram that shows a zener diode connected to the output side of the rectifier circuit so that it can supply a regulated voltage to the load. (b) The waveform of full-wave rectification voltage at the output of the rectifier. (c) The waveform of the regulated voltage measured across the load after it passes the zener diode.

Thomas E. Kissell�Industrial Electronics, 3e

13 of 33

Figure 7--13 (a) Electronic diagram that shows two metal-oxide varistors (MOVs). MOV1 is for protection against overvoltge conditions from incoming voltage, and MOV2 provides surge protection against transient voltages that may be produced in an inductive load. (b) Electronic diagram that shows three MOVs connected in a three-phase power supply. (c) Electronic diagram that shows two MOVs connected in a single-phase power supply. (Copyright of Motorola. Used by Permission.)

Thomas E. Kissell�Industrial Electronics, 3e

14 of 33

Figure 7--14 Electronic diagrams of two types of crowbar circuits that use an SCR to provide overvoltage protection in power supplies. (Copyright of Motorola, Used by Permission.)

Thomas E. Kissell�Industrial Electronics, 3e

15 of 33

Figure 7--15 Electrical diagram of the power supply for a variable-frequency drive. (Courtesy of Rockwell Automation.)

Thomas E. Kissell�Industrial Electronics, 3e

16 of 33

Figure 7--16 Electrical diagram of the power supply for a six DC arc-welding system. Notice that this power supply uses six diodes in each section of a center-tapped transformer full-wave bridge rectifier. The diodes are connected in parallel to supply larger currents.

Thomas E. Kissell�Industrial Electronics, 3e

17 of 33

Figure 7--17 An uninterruptible power supply (UPS) in an enclosure with several PLC racks. (Courtesy of Liebert Inc.)

Thomas E. Kissell�Industrial Electronics, 3e

18 of 33

Figure 7--18 An electronic block diagram of an uninterruptible power supply (UPS). (Courtesy of Liebert Inc.)

Thomas E. Kissell�Industrial Electronics, 3e

19 of 33

Figure 7--19 (a) Electrical diagram of a typical inverter circuit that uses four silicon-controlled rectifiers (SCRs). (b) Output waveform for SCR inverter.

Thomas E. Kissell�Industrial Electronics, 3e

20 of 33

Figure 7--20 Electronic diagram of a transistor inverter with the output waveforms for the AC voltage. (Courtesy of Rockwell Automation.)

Thomas E. Kissell�Industrial Electronics, 3e

21 of 33

Figure 7--21 Electrical diagram of a three-phase inverter that uses six transistors. (Courtesy of Rockwell Automation.)

Thomas E. Kissell�Industrial Electronics, 3e

22 of 33

Figure 7--22 Voltage and current waveforms for the variable-voltage input (VVI) inverter. (Courtesy of Rockwell Automation.)

Thomas E. Kissell�Industrial Electronics, 3e

23 of 33

Figure 7--23 Voltage and current waveforms for the pulse-width modulation (PWM) inverter. Notice that the overall appearance of each waveform is an AC six-step sine wave and that it is actually made of a number of square-wave pulses. (Courtesy of Rockwell Automation.)

Thomas E. Kissell�Industrial Electronics, 3e

24 of 33

Figure 7--24 Voltage and current waveform for the current-source input (CSI) inverter. (Courtesy of Rockwell Automation.)

Thomas E. Kissell�Industrial Electronics, 3e

25 of 33

Figure 7--25 Electronic diagram of a linear power supply.

Thomas E. Kissell�Industrial Electronics, 3e

26 of 33

Figure 7--26 Electronic block diagram of a switch-mode power supply (SMPS). (Courtesy of Philips Semiconductors.)

Thomas E. Kissell�Industrial Electronics, 3e

27 of 33

Figure 7--27 Electronic diagram and waveforms for a buck converter circuitry for a switch-mode power supply. (Courtesy of Philips Semiconductors.)

Thomas E. Kissell�Industrial Electronics, 3e

28 of 33

Figure 7--28 Electronic diagram and waveforms for a boost regulator for a switch-mode power supply. (Courtesy of Philips Semiconductors.)

Thomas E. Kissell�Industrial Electronics, 3e

29 of 33

Figure 7--29 Electronic diagram of a buck-boost regulator. (Courtesy of Philips Semiconductors.)

Thomas E. Kissell�Industrial Electronics, 3e

30 of 33

Figure 7--30 Electronic diagram of a forward converter and waveforms. (Courtesy of Philips Semiconductors.)

Thomas E. Kissell�Industrial Electronics, 3e

31 of 33

Figure 7--31 Electronic diagram of a push-pull converter. (Courtesy of Philips Semiconductors.)

Thomas E. Kissell�Industrial Electronics, 3e

32 of 33

Figure 7--32 Electronic diagram of a DC half-bridge converter. (Courtesy of Philips Semiconductors.)

Thomas E. Kissell�Industrial Electronics, 3e

33 of 33

Figure 7--33 Electronic diagram of a full-bridge converter.

Thomas E. Kissell�Industrial Electronics, 3e