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Powered by WordPress. Q) Is PWM implementation of a sinusoidal can fed directly to the motor windings in order to achieve precise control or do we need in some way to convert the PWM Q) Is it possible to brake (slow down / stop) the motor with the control techniques discussed? How feasible is it to write a story without any worldbuilding? Source

A) BLDC and PMSM are not apple-to-apple classfication. They work well for some applications, but in many ways BLDC/PMSM are superior. A) Sinusoidal control will be more efficent than six-step control. A. http://www.completepowerelectronics.com/power-supply-related-interview-questions-answers/

Power Supply Test Questions

If we use schottky diode we can reduce power dissipation across the diode as the power dissipation = Vf x I [4 ] Why schottky diodes are used in reverse voltage Privacy Policy Terms of Use Sales and Refunds Site Map Looking for something? Your existing password has not been changed.

  • Q) Normally lots of noise is introduced on Hall sensor signals in motor.
  • A simple trick could be blowing all the dust out of the psu with condensed air or an air blower as they dust could be interfering with the electricity from passing
  • Q) Does the commutation happen in between the sector or at the start/end of the sector?
  • In other way, the Hall sensors was put inside BLDC motor by motor vendor.
  • A) The back-EMF of the motor is estimated and can provide the rotor angle information.
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  • For the same load current, the forward voltage drop Vf is less in schottky diode compare to normal rectifier grade diodes.
  • In this way, no additional torque required.
  • More resources See also solved 750Ti FTW Power Supply Questions solved Questions regarding a power supply purchase solved Power Supply questions solved Should I upgrade my Power Supply (and a few

So they are used in high frequency applications like SMPS. [6] How to protect the power supply against over voltages or surge voltages? In the last full financial year we estimate our market share of the power converter market was approximately 6% overall; 11% in Europe, 8% in North America and 1% in Asia. All Rights Reserved Tom's Hardware Guide ™ Ad choices Articles & News Forum Graphics & Displays CPU Components Motherboards Games Storage Overclocking Tutorials All categories Chart For IT Pros Get Thanks A) Yes.

Theme by Press Customizr. Viva Questions On Smps I'd expect the rated output current to be about twice the old supply's rating, but your machine will only draw the current it requires. Yes, dividends are paid on a quarterly basis, dependent on the performance of the business in the relevant period. http://electronics.stackexchange.com/questions/229345/power-supply-replacement-question That's why we always "align" our rotor before starting the motor.

DC bus capacitor or battery) may be blown up. Sign In Create Account {* /signInForm *} Sign In Welcome back, {* welcomeName *}! {* loginWidget *} Use another account Sign In Welcome Back {* #signInForm *} {* signInEmailAddress *} {* Chrome plating requires perhaps about 4X the current density of copper or nickel plating, and if the current is too low, no chrome plating will occur at all. is there an adapter from the other power supplies so I can use them ?) No answers yet Does the internation travel kit convert voltage?

Viva Questions On Smps

A) Nope, they are separate control techniques each with their own advantages and disadvantages. Get More Information Q) What is the difference between sinusoidal PWM and space vector modulation? Power Supply Test Questions Regards, Ted Mooney, P.E. Objective Question On Smps That note below 'combined power shall not exceed' is telling you what it's real rating is.But it has 30Amps +12V power and the Corsair 430CX has 28Amps +12V power.CM = 2yr

A) Yes, sinusoidal control can be used on those motors. this contact form A) The PWM frequency depends on your application. Q) In sinusoidal excitation, the three windings are excited simultaneously, how can then the back-EMF be measured? Q) How is field weakening done with field-oriented control? Smps Questions Answers

Q) Is it correct to state that adding ID changes the magnetic field of the stator, which changes the voltage-constant of the motor? Total Continuous Amperage Available on the +12V Rail(s) is the most important factor.The Corsair Builder Series CX430 V2 (CMPSU-430CXV2), with its combined +12 Volt continuous current rating of 28 Amps and I am looking for a supply that I can run in my aluminum anodizing tank, Nickel, Copper and Chrome plating tanks too. have a peek here Then, we can start our algorithm Q) Great presentation!

All Rights Reserved Tom's Hardware Guide ™ Ad choices Articles & News Forum Graphics & Displays CPU Components Motherboards Games Storage Overclocking Tutorials All categories Chart For IT Pros Get The worst case would be if when the system starts, it might off by one Hall state for a very brief amount of time. Total Continuous Amperage Available on the +12V Rail(s) is the most important factor.The Corsair Builder Series CX430 V2 (CMPSU-430CXV2), with its combined +12 Volt continuous current rating of 28 Amps and

Q) For which applications can we use sensorless control and for which can we not use it.

That CM 500 PSU is not a 500W PSU. Q. Q. Asked by Susan S from Naples Feb 27, 2016 Flag as inappropriate (Does the internation travel kit convert voltage?) Asked about: Apple World Travel Adapter Kit Answer now (Does the internation

Home + Who We Are About Us History Strategy Business Model Our Marketplace Our Products Our Values Our Board Our Governance Questions and Answers + Investors Investment Proposition + Share information Q) How do you start the motor using sinusoidal control, if the rotor is in between two phases and there is no Hall effect sensors? A) If your motor is running in torque control, it will stall at a precise load torque applied. Check This Out A) Any application that requires a large (>50%) of torque during startup or requires the motor to operate at less than approximatly 10% of rated speed will be difficult to use

Chrome plating rectifiers may have external "chokes" (large inductor/capacitor networks to filter out any "ripple"); but at the least they are 3-phase devices with much less ripple than a single-phase power Does it appear that the same motor has a higher motor constant? A) Six-step sensorless gives you six points per pole pair. Has this been officially confirmed? 2/22/20175:31:25 AM resistion The site that gave 32 is obviously a year too old, but the Memory Guy says 64 does use string stacking.

However if the effective stator magentic field is in a position where it is very out of alignment it could cause issues with starting. What is the life cycle of a typical customer program? Would it be wise to find one that has both variable current and variable voltage? Neither the Documentation nor the Product itself has any rating on it, however, the power chord does have some fine print which says 2.5A 125 Volts ~.

Switching power to a sensor Quantum Based AI getting around Isaac Asimov's "Three Laws of Robotics" How did the destruction of the Ring cause Arwen to change from Evenstar to Morningstar? More resources Tom's Hardware Around the World Tom's Hardware Around the World Denmark Norway Finland Russia France Turkey Germany UK Italy USA Subscribe to Tom's Hardware Search the site Ok About By using MOV (Metal Oxide Varistor) we can suppress the surge voltages. Try replacing the cables that connect to your gpu, cpu and mobo as one of them could be damaged or worn.

Your cache administrator is webmaster. My current power supply has an input of 120v~60Hz 12VA, can i replace it for one with an input of 120V~60Hz 25W? A) Speed control requires a separate controller that will adjust the amount of voltage applied to the motor. Vfull_load = Output voltage at rated load current.

What is the value that XP Power provides to its customers? The pc shuts down on boot-up as (most likely) an electrical surge/overload protection to protect your components due to something not working in the psu. Plating rectifiers may have automatic current density control, so larger and smaller loads plate at the correct current; etc. By including diode in the phase line we can protect the circuit against applying reverse voltage.

Q) Are there any considerations when changing direction (ie, how to offset motor momentum in the opposite direction)?