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What is the significance of 3 phase in power system? Why not 2 0r 4 0r 6 phase?

First, why 3 phase instead of single phase? Two reasons. 1) It enables delivery of 1.73 times more power for a given amount of conductor, due to the increased "fill-in" of the current sine wave-form with the timing of the wave-forms. 2) It can provide automatically a rotating magnetic field for ...

March 31, 2017
Do PM Motors Have Slip?

‘We know induction motors suffer from slip’. It wouldn’t be appropriate to say so, because the slip is necessary for the induction motor to rotate continuously. I believe Niels, in his answer, has also mentioned the same thing and also stated rightly that permanent magnet (PM) motors do not work ...

March 31, 2017
What Is The Strategy Of BMW?

After seeing competition from all fronts, BMW pursued three major strategic objectives: Increased Product Variety: Various options available in different countries in different colors, engines and configuration. “Each customer can have a unique car.” More frequent product introduction: Initially, ...

March 31, 2017
What's the difference between motor, engine, and machine?

A motor consumes energy to generate power so does an engine. Principally they are the same. But Engines are Prime Movers which means they themselves generate the energy(usually heat) and convert it to power eg. automobile engines use the heat from the fuel to create power Motors on the other hand ...

March 31, 2017
Why Aren't All Small Equipment Motors Brushless?

Brushless DC motors need control electronics: transistors to turn on and off (and alternate polarity of) the voltage going to the motor windings, which are capable of switching relatively high currents (multiple amps) at high frequencies. Brushed DC motors simply require wires connecting the DC ...

March 31, 2017
Is Washing Machine Motor A DC or an AC?

Most use an ac motor even a brushless dc motor with permanent magnets is still an ac motor with a variable frequency drive running it on 3 phase. Some of the older washing machines use a brushed universal motor that will run on ac or dc but are run on ac because it is convenient.

March 31, 2017
How Does Motor Oil Get Dirty?

It's a closed system isn't it? Where does all dirt and sludge that makes motor oil "dirty" come from? Those black particles come from two processes. The oil burns a little along the cylinder walls during combustion, and this is scraped off into the crankcase by the movement of the pistons. There's ...

March 31, 2017
What Is D.C. Motor?

A DC motor is an electric motor that runs on direct current (DC) electricity. A DC motor is designed to run on DC electric power. Two examples of pure DC designs are Michael Faraday's homopolar motor (which is uncommon), and the ball bearing motor, which is (so far) a novelty. By far the most common ...

March 31, 2017
How To Replace A Washing Machine Motor

Replacing a motor Note: Disconnect the power source to your washer before you conduct this or any other test. Either unplug the unit from the wall outlet, remove the appropriate fuse from the fuse box, or flip the appropriate breaker in the circuit breaker panel. Locate your washer's motor. There ...

March 31, 2017

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