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Which Type Of Motor Is Used In Fans?

Induction motors Vs BLDC motors: The technology explained The ceiling fan industry isin the cusp of such a transition. BLDC is the new revolution in the fan industry. And it is only a matter of time before all old inefficient induction motor fans will be replaced by smart super efficient BLDC fans. ...

February 28, 2018
Why should a DC series motor never be started on no-load?

In series motor field winding is in series to armature winding. In any DC motor the speed depends inversely on the flux and directly proportional to emf, N ~E/flux. Motor armature current is decided by the load.On no load the armature current drawn by the motor will very small. For d.c. series motor...

February 28, 2018
What are the differences between a DC motor and an AC motor?

A DC motor works in the same principle as an AC motor, with a mechanism to allow it to rotate even if the supply is not alternating. After all, simple motors work because the the direction of current reverses (alternates) every half cycle, rendering the armature to rotate. Now why does the current ...

February 28, 2018
How can I convert the single phase to three phase?

There are 3 ways (or more ) 1. Couple a single phase motor with 3-ph generators (this method is not much practical ) 2. You can go for Ernoconverter . Let me explain ……. Suppose you are having a 3ph induction motor . Connect it in delta configuration . Apply 1ph supply to any of it's winding amd ...

January 9, 2018
What Happen When One Phase Is Cut Off In Three Phase Motor?

If motor is switched on while one phase is cut off, motor will fail to start. It will make noise and draw considerable current. If proper protection (thermal overload relay / single phase preventer relay) is provided, it will trip supply to the motor. In absence of protection, motor will burn. ...

January 9, 2018
Why don't electric cars have an electric motor inside each wheel?

I’m not an EV designer, but here are 6 good reasons from first principles… Weight. Four motors are heavier than one motor and a transaxle, even with a differential to allow the left and right driven wheels to turn at different speeds while cornering. Unsprung weight. Weight that tracks the bumps in ...

November 29, 2017
What is the most unique electric motor you know of?

High torque servo motors. These look like a bracelet made of copper wire and have awesome torque. They come out of the box inside a ring-shaped neodymium permanent field magnet, from which they must never be separated, and their magnetic field is so intense that you must never, ever, overload them ...

November 29, 2017
What are a compound DC motor’s advantages? Speed Variation or Torque?

There are two primary advantages to DC motors: Speed Variation and Torque. Speed Variation Speed variation is accomplished by changing either the armature voltage or field voltage, or a combination of both. For example, a motor with a base speed of 1750 RPM and armature voltage of 500 VDC will run ...

November 16, 2017
What is the difference between servo motor & DC motor?

DC motor -DC (Direct Current) Motors are two wire (power & ground), continuous rotation motors. -The speed of DC motors is controlled using pulse width modulation (PWM), a technique of rapidly pulsing the power on and off. The percentage of time spent cycling the on/off ratio determines the speed of ...

November 16, 2017
What type of motor is used in a lift?

Older days Elevators were run by DC motors, since their RPM was easy to control, and was much cheaper. But it had a worse torque characteristics, hence has a lot of jerks and bumps for the users. Then as time passed Induction motors began to hit the market and most of the industries now use them ...

March 31, 2017
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

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