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Power Supply Question.

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This is a very time-intensive and inefficient method of troubleshooting. This is useful when you want one of the terminals to be referenced to ground. Blog Q&A: BLDC Motor Control Class Questions Adam Reynolds, Solutions Architect LineStream Technologies2/21/2017 00:00 AM EST0 comments post a comment NO RATINGSLogin to Rate Tweet Here are the Q&As from EE Describe the limitations of the circuit shown, and explain how some of the other filters would do a better job. Source

Power Supply Application http://www.amtex.com.au/ApplicationNotesPower.htm Using a power supply to generate a DC offset with a function generator If a signal source such as a function generator does not have a DC SCPI-like SCPI has helped greatly, but isn't a complete solution, because new features get added that require new commands. If the load resistance decreases in a Zener regulator, then Zener current ……………. Typical numbers are 500 to 1500 V. http://www.instructables.com/answers/Power-Supply-Question/

Power Supply Test Questions

Furthermore, having students build their own practice problems teaches them how to perform primary research, thus empowering them to continue their electrical/electronics education autonomously. Follow-up question: explain in detail how the issue of non-isolation could create a safety hazard if this rectifier circuit were energized by an earth-grounded AC line circuit. Follow-up question: suggest a part number for a diode capable of withstanding the reverse voltage generated by this circuit, and able to handle at least 1 amp of continuous current.

Reveal answer Hide answer Most electric power distribution systems are AC, yet most electronic circuits function on DC power. A power supply could broadly be defined to be anything that supplies power, such as a hydroelectric dam, an internal combustion engine, or a hydraulic pump. Challenge question: based on the voltage measurements taken, which do you think is the more likely failure, an open primary winding or an open secondary winding? Commercial Power Supply Has Voltage Regulation Of Q) What it is HFI method?

Is a battery Acts like a battery in the breakdown region Has a barrier potential of 1 V Is forward biased Answer : 2 Q28. Mcq On Power Supply For measuring the power consumed by the load, you can use the voltage and current meters of the DC power supply as long as you know they're accurate. A) Those two topologies are used since the three motor phases need to be connected at the neutral point so that the current will return to ground. http://www.xppowerplc.com/html/about/questions.asp Inductor L1 fails open: no voltage across load, no current through load, no current through rest of secondary-side components, little current through primary winding.

Illustration 2: (A) Typical thermal noise (B) Slower capture of (A) showing spike (~15 mV) (C&D) Details of spike Temperature As the components that make up power supplies are temperature Ac Power Supply Mcqs Because of this, switching mode power supplies often have a minimum output voltage specification. Not only will this module produce a 5V output, but also produce a triangle wave. If the value is off by more than about 5-10% it can cause a lot of efficency loss and could lead to motor stall.

  1. However, it hopefully shows that something as "simple" as connecting a single cable to a power supply and making a measurement involves a number of things to think about.
  2. Thumbwheel and pushbutton switches are useful (if their settings are accurate) because they can eliminate the need for a meter.
  3. To deal with no or low load situations you mearly reduce the amount of current you are providing.
  4. Q) How is Bsta and Brot angle be measured?
  5. A.
  6. This is where one output will track the output voltage of another output.
  7. There are advanced techniques that will detect the initial position of the rotor by injecting high frequencies.
  8. Q.

Mcq On Power Supply

Q) ....and starting in the sensorless design? http://electronicspost.com/multiple-choice-questions-and-answers-on-regulated-dc-power-supply/ What follows is a sequential record of her measurements: VTP1−TP2 = 118 volts AC VTP3−TP2 = 0 volts AC VTP1−TP3 = 118 volts AC VTP4−TP5 = 0.5 volts AC VTP7−TP8 = Power Supply Test Questions Enter your email below, and we'll send you another email. {* #resetPasswordForm *} {* signInEmailAddress *} {* /resetPasswordForm *} Create New Password We've sent you an email with instructions to create Multiple Choice Questions On Smps When load current is zero, the Zener current will be ……… Zero Minimum Maximum None of the above Answer : 3 Q40.

Q. http://dotbowl.com/power-supply/power-supply-question-how-many-watts-do-you-need.html Remote sensing uses two high impedance input terminals to sense the output voltage of the supply. Burnt electronic components usually produce a strong and easily-recognized odor, always indicative of overheating. Some power supplies instead use 10-turn pots for adjustment. Objective Question On Smps

Notes: It is important for students to understand where this equation comes from. Notice how I did not simply ask them to regurgitate a formula; rather, I presented a realistic figure for them to interpret. In most sciences, realistic experiments are much more difficult and expensive to set up than electrical circuits. have a peek here A) In the examples we were only talking about a single pole-pair motor.

Sign in Create New Password We didn't recognize that password reset code. Series Voltage Regulator Viva Questions ICP 备案号 10220084.Premier Farnell Ltd, registered in England and Wales (no 00876412), registered office: Farnell House, Forge Lane, Leeds LS12 2NEelement14 Software Version: 8.0.5.0 , revision: 20161130101351.a2ff2dc.stable_8.0.5.x Products Products Power Supplies The power switch just controls the power control signal.

Question 2 A technician builds a simple half-wave rectifier circuit for a project, but is surprised to find that the diode keeps failing: This comes as a surprise because the diode

Better to solder just a cable Enrico Like Show 0 Likes(0) Reply Actions Re: Power Supply Question Andy Clark (Workshopshed) Dec 23, 2016 10:55 AM (in response to balearicdynamics) The kit A few years ago, I grabbed an older powersupply from the pile of "old spare powersupplies" and it indeed behaved weird and required a load to be stable. What is the load regulation? 09% 87 % 72 % None of the above Answer : 1 Q25. Which Of The Following Statements Does Not Describe An Advantage Of Digital Technology 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

Question 15 A student learns that a rectifier circuit is often followed by a low-pass filter circuit in an AC-DC power supply to reduce “ripple” voltage on the output. As usual, avoid very high and very low resistor values, to avoid measurement errors caused by meter “loading” (on the high end) and to avoid transistor burnout (on the low end). Or can anyone point to a hack with a computer power supply wiring to multiple usb jacks?Any info would be great. Check This Out This class will provide a fundamental overview of different control techniques and introduce software tools that make the control easy.

Day 1: Controlling BLDC Motors | Part 1: Control Theory

For switching power supplies, you'll want to examine higher frequencies and may see voltage spikes.




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