DC Supply to an AC Motor

It will Burn with out run.

One exception being if it is an AC/DC universal motor, but then you probably wouldn't call it an AC motor. Many hand tools (drills, saws, electric mixers (for cooking), use universal motors that can run on AC or DC.

That's right. An AC induction motor will not run on DC, but a universal motor has brushes and is wired so the current in both the rotor and stator reverse when the polarity reverses, so the direction of rotation stays the same.

Cheers..........Codey

sir please explain me detail

The motor will not run.

The motor will ruin.

AC motor - Wikipedia, the free encyclopedia

Try it, but keep a fire extinguisher close by

And the whole exercises is called the burn out test, if motor don't catches the fire means motor is burn-out safe.

if we give dc supply to the induction motor it willnot rotate because there is not rotating magnetic field. the status of winding wether burning or staying in good condition depends on voltage we applied

An AC motor spins because the stator windings create a magnetic field around themselves, and through induction, they create a magnetic field around the cage in the rotor. The relative strengths of these fields is rising and falling with the sine wave of AC power, and they rise and fall at a slight offset to each other, so the rotor is magnetically "chasing" the fields in the stator. As the rotor field spins inside the stator fields, it in turn induces a back emf on the stator windings, called "mutual inductance". The mutual inductance limits the flow of current in the stator circuit.

If you apply DC to the stator, it does still set up a magnetic field, but it is stationary. It does also still set up a magnetic field in the rotor, but it too is stationary. So the rotor field still follows the stator field, but since neither is rotating, the rotor stops. Without the mutual inductance to limit the current, current will be limited only by the very low resistance of the conductors in the stator winding and the motor will be destroyed in relatively short order.

The one caveat is if you can control the DC voltage so that the current flow is at a tolerable level. This is what a DC Injection Brake system does. It controls the DC current by controlling the voltage so that the windings are not damaged, and because the rotor wants to "chase" that stationary field, it comes to a stop (assuming it was already moving). The same concept is also use to keep AC motor windings warm to prevent moisture damage, then it is called a Motor Winding Heater. Same concept, but even lower current.

thank you sir

Just like the 6th posted stated the three phase AC motor (I'm assuming 3 phase since it was not stated) will not run since you need a rotating magnetic field to get it to run and well DC does not accomplish this. But when the proper amount of DC is applied to your stator windings it acts as a form of breaking the motor when it is running. In the end only apply AC to the three phase motor, and leave any consideration of applying DC to the engineer or an experienced electrician.

Same holds true for 1 phase motors too.

Even if you give AC Supply to an AC Motor, it will not "RUN" anywhere; it will be stayput to where it is as any motor would be fitted to its foundation with fasteners. It is very crude method to call a motor 'running'. Is it not that the rotor only is 'rotating' (that too not 'running') about its axis? We have spoilt a whole lot of electrical community here by such "slanguages".

Whaaaat? Is this a joke? "Run" no doubt originally meant going fast on 2 or more legs, but its meaning has evolved well beyond that. Nothing wrong with eg a car engine or electric motor running that I can see.

Cheers..........Codey

With a bit of luck, the circuit protective device(s) will operate before the motor starts smoking/catches fire, etc.