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An induction motor relies on low-frequency currents induced in the rotor by the difference in speed between the rotor and the rotating magnetic field. At sychronous speed the induced current is zero therefore the torque is also zero.

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10y ago
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12y ago

Low voltage or possibly the loss of one phase.

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12y ago

A 3-phase motor can be slow by:-

1. BY INCREASING THE NUMBER OF POLE PAIR.

2. BY USING GEAR.

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14y ago

An open phase wire.

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Q: Why does a 3 phase motor turn slowly?
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Is a 3 phase motor a Synchronous motor?

A synchronous motor can be a type of 3-Phase AC motor, or not.A synchronous motor is defined by the period of the rotor being synchronized with the frequency of the stator windings' current. The stator windings might be 3-Phase or not (2-Phase would work).Also synchronous motors are not the only type of 3-Phase AC motors. An induction motor could also be 3-Phase AC and has a few advantages and disadvantages over a synchronous motor.


What size motor do you need to run a compressor 2 stage 80 gallon tank i have a 3 phase on it and want to change motor?

You probably need a 5hp or 7hp motor. Look for HP rating o the 3 phase motor and select the same for single phase. 3 phase has same power but is more efficient at electricity use. Also consider a 3 phase converter. It allows a 3 phase motor to run on single phase service.


When changing phase rotation of a 3 phase motor is this done at the switchboard?

The phase rotation of motor should be always done from motor side i.e The motor terminal box.


Why 3 phase motor rotate in opposite direction?

You would reverse rotation on a 3 phase motor to get it to run backwards. Say I fill up a tank truck from a lake. I turn on my generator. I run the motor in one direction. Then I drive the tank truck and the motor to a different location. Then I turn on my generator. I attach the hose to the motor on tank truck. I throw the switch to make the motor run backwards. I aim the hose at the fire in your house. Aren't you glad that I can make my 3 phase motor run backwards?


What is the minimum voltage a 115vac 400hz 3 phase motor will run?

Yes the minimum voltage of an 115vac 400 Hz 3 phase motor will run. You can run a single phase motor on a three service but you cannot be run on a single phase.

Related questions

How do you turn a 3 phase motor in to a generator?

We can convert a 3 phase ac motor into generator by changing phase sequence of the ac input cable of that motor


How do you prove that a rotating magnetic field is produced when a 3 phase supply fed to a 3 phase winding?

The motor will turn


Is 3 phase motor run on 1 phase supply?

No. That would be a single phase motor.


What is advantage of phase sequance cheaker of 3 phase supply?

it can tell you which way a motor will turn before you apply power sometimes nice to know


Can a starter used for 5 hp 3 phase motor be used for 7.5 hp 3 phase motor?

No.


Is a 3 phase motor a Synchronous motor?

A synchronous motor can be a type of 3-Phase AC motor, or not.A synchronous motor is defined by the period of the rotor being synchronized with the frequency of the stator windings' current. The stator windings might be 3-Phase or not (2-Phase would work).Also synchronous motors are not the only type of 3-Phase AC motors. An induction motor could also be 3-Phase AC and has a few advantages and disadvantages over a synchronous motor.


How do you convert or rewire a 20HP 3 phase motor to single phase motor?

The winding design of the motor will not economically allow this to work. You would have to drive a 3 phase generator to supply it.


What are the advantages of three phase motor over the single phase motor?

A 3-phase motor produces a steady torque that does not pulsate. A 3-phase motor starts turning in the right direction when switched on without the need for a separate starting winding.


What size motor do you need to run a compressor 2 stage 80 gallon tank i have a 3 phase on it and want to change motor?

You probably need a 5hp or 7hp motor. Look for HP rating o the 3 phase motor and select the same for single phase. 3 phase has same power but is more efficient at electricity use. Also consider a 3 phase converter. It allows a 3 phase motor to run on single phase service.


What 3 phase conction of eletical diagram?

what is 3 phase eletical conction digram of 3 phase motor


Is 380 volts electric motor a single phase or 3 Phase?

It is probably a three phase 50 Hz motor.


When changing phase rotation of a 3 phase motor is this done at the switchboard?

The phase rotation of motor should be always done from motor side i.e The motor terminal box.