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Shunt regulators use a variable resistance placed in

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SHUNT REGULATORSuse a variable resistance placed in parallel with the load.Regulation is achieved by keeping the resistance of the load constant. Characteristically,the resistance of the shunt moves in the opposite direction of the resistance of the load.VR-TUBE REGULATORSare shunt regulators that use a cold cathode as a variableresistance in parallel with the load. Because of their ability to maintain a constant voltagepotential between their plates and cathode, glow tubes can be connected in series toregulate any voltage. Additionally, glow tubes can be used to deliver different voltages todifferent loads.SIMPLE ELECTRON TUBE REGULATORSuse the dc plate resistance of a triode asa variable resistance in series with the load. The resistance of the vacuum tube is variedby changing the amount of conduction of the tube. This is done by holding the controlgrid voltage at a constant level and allowing the cathode voltage to vary with the outputvoltage.TheAMPERITE VOLTAGE REGULATOR or BALLAST TUBEis normally usedto control current surges. This is done by heating an iron wire in a hydrogen-filledenvelope. The hot iron will present a large resistance to current flow.
NEETS MODULE 6-Electronic Emission, Tubes, and Power SuppliesUNCLASSIFIED3-80UNCLASSIFIEDANSWERS TO QUESTIONS Q1. THROUGH Q45.A1. Transformer, rectifier, filter, regulator.A2. To maintain a constant voltage to the load.A3. It couples the power supply to the ac line voltage, isolates the ac line voltage fromthe load, and steps this voltage up or down to the desired level.A4. Filament voltage to the electron tubes.A5. Provides capability of developing two high-voltage outputs.A6. Positive.A7. Cutoff.A8. Pulsating dc.A9. Series.A10. 60 hertz.A11. Eavg= 0.318 × Emax.A12. 120 hertz.A13. 63.6 volts.A14. The peak voltage is half that of a half-wave rectifier.A15. The bridge rectifier can produce double the voltage with the same size transformer.A16. Decrease-Capacitance is inversely proportional to XC.A17. Capacitor.A18. Parallel.A19. High.A20. Increase.A21. Value of capacitance and load resistance.
NEETS MODULE 6-Electronic Emission, Tubes, and Power SuppliesUNCLASSIFIED3-81UNCLASSIFIEDA22. Good.A23. Yes.A24. Counter electro-motive force of the inductor.A25. 1 to 20 henries.A26. Decrease.A27. Small.A28. Expense.A29. When ripple must be held at an absolute minimum.A30. LC capacitor-input filter.A31. Cost of the inductor and size of the inductor.A32. Ac line voltage and a change in load resistance.A33. Percent of regulator.A34. 33.33%A35. 0%.A36. Variation.A37. Series and shunt.A38. Increase.A39. Parallel.A40. Variable resistor.A41. Current regulation.A42. Decrease.A43. Safety precautions.
NEETS MODULE 6-Electronic Emission, Tubes, and Power SuppliesUNCLASSIFIED3-82UNCLASSIFIEDA44. Reduce the cost of manufacturing equipment.

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Term
Summer
Professor
UDOMSAK
Tags
Test, Vacuum tube, Power supplies

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