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Appendix 1: Glossary http://www.abbottelectronics.com/engineer/glossary.htm http://www.currentsolutions.com/knowledge/glossary.htm Line regulationHow much the load voltage or current changes when the power supply is operated at varying line voltages throughout a given range. Thumbwheel and pushbutton switches are useful (if their settings are accurate) because they can eliminate the need for a meter. This is useful when you want one of the terminals to be referenced to ground. The falcon has 5 amp fuses, so you may be a little low on capacity. Source

Media Videos Press Releases Sustainability Contact Us UK Contact Questions and Answers Who We Are > Questions and Answers Questions and Answers Q. Here are two simple AC-DC power supply circuits, one without a filter and one with: Draw the respective output voltage waveforms of these two power supply circuits (Vunfiltered versus Vfiltered). Alternatively, a variable transformer (adjustable autotransformer) can be used to (almost) continuously vary the voltage1. This is especially useful for "switching” power supply circuits, where transistors are used to switch power on and off very rapidly in the voltage transformation and regulation process: Determine what type http://www.xppowerplc.com/html/about/questions.asp

Power Supply Test Questions

As the junction temperature increases, the voltage breakdown point for avalanche mechanism …………. The scope's input was AC coupled (the channel was checked to ensure that the AC coupling made no measurable affect on the amplitude of an input signal down to 30 Hz). The power supply output is regulated with a feedback circuit which adjusts the timing (duty cycle ) with which the MOSFETS are switched on or off.

Reveal answer Hide answer The problem is that the vertical axis input is DC-coupled. For switching power supplies, you'll want to examine higher frequencies and may see voltage spikes. You set the power supply's over-voltage protection to 5.5 volts. Certainly, the diode was not properly rated for the reverse voltage it was being subjected to, but this might not be the only form of abuse!

Trace the shape of the input current waveform, given the output voltage waveform and magnetizing current waveform (dotted line) shown here: The non-filtered DC output waveform is still shown as a Objective Question On Smps Aim for 40kHz +. Explain why the ripple frequency of the full-wave rectifier is twice that of the half-wave rectifier. For a variety of complicated reasons involving safety, one of these transformer lead wires is connected to the earth using a copper bar driven into the ground.Minimum loadIf specified for a

The aim of this approach is to create power supplies whose characteristics combine the strength of both linear and switching mode technologies. Obviously I will need to power both sides of the board. The outputs can be turned on and off independently or all at once (useful for powering up a whole printed circuit board). Ask your students if the word "supply” is truly appropriate for this type of circuit.

  • It's important not to exceed the specification, as you might cause dielectric breakdown of an internal component and/or exposure to hazardous voltages.
  • Wire and contact resistance Can I connect in parallel?
  • Some products, such as the B&K Precision model 1655A Variable Isolated AC Power Supply shown below, combine both an isolation transformer and a variable transformer.
  • Notes: Troubleshooting scenarios are always good for stimulating class discussion.

Objective Question On Smps

Regulation Load regulation is how much the output voltage changes when the load changes, usually from 0 to 100% of rating. http://www.powerstream.com/q_a.html Remains the same Is increased Is decreased None of the above Answer : 3 Q21. Power Supply Test Questions Forward biased Unbiased Reverse biased Operating in the breakdown region Answer : 4 Q29. Mcq On Ups A popular model is the Model 9130: The three outputs can be set independently either by the knob or the keypad.

Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the http://dotbowl.com/power-supply/power-supply-makes-clicking-noise-when-i-press-power-button.html Parallel Series-parallel Series None of the above Answer : 3 Q17. Q. Q. Indiabix

With that limited knowledge I figure I can run 220 pixels on 5 amps. (2 strings)I will be putting each 110 pixel string on a separate universe. 14 total. The maximum efficiency for a linear supply is generally around 60%. A Zener diode is used as a …………… voltage regulating device Shunt Series Series-shunt None of the above Answer : 1 Q9. have a peek here steveastrouk -max-3 years agoReplyNo, HIGHER switching speeds, done right, are much more efficient, components are smaller, emissions lower.

Circuit elements that are possibly faulted 1. 2. What is the value that XP Power provides to its customers? The supply has a number of useful features.

This permits continuous transition from constant current to constant voltage modes in response to the load change.

Used to describe an unchanging voltage, current, or electrical power.DriftThe change in time of an output voltage or current.Electronic loadA type of instrument that serves as a load, usually dynamic, and These factors add up to enable them to gain a competitive advantage. SCPI-like SCPI has helped greatly, but isn't a complete solution, because new features get added that require new commands. Reveal answer Hide answer VTP1−TP2 = 120 volts AC VTP1−TP3 = 120 volts AC VTP2−TP3 = 0 volts VTP4−TP5 = 12.63 volts AC VTP5−TP6 = 12.63 volts AC VTP7−TP8 =

Resistors need to be non-inductive. Then the output will never exceed 5.5 volts regardless of how much you turn the voltage adjust knob. A lower power factor system would mean greater loss in power to produce the same amount of work as compared to with a higher power factor system.Ripple VoltageThe portion of unfiltered Check This Out In the occurrence of a blackout, for example, your computer would continue to draw power from the UPS thus allowing you to save your work and shutdown your system properly without

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