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What is the stator resistance per phase of 0.25 hp 3 phase TEFC motor where supply is at 50 Hz and 415 VAC?
Wiki User
∙ 9y ago
The resistance is decided by the designer. In principle the stator could have zero resistance. The actual resistance depends on how efficient the motor is required to be. Efficiency has to be traded against the mass and cost of the motor, because lower resistance for greater efficiency requires thicker, heavier copper wire.
In practical designs, higher-powered motors are usually made more efficient in order to reduce the energy wasted in the resistance. For low-powered motors it isn't worth it because they don't waste much energy anyway.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoIn principle the stator could have zero resistance, so the resistance can not be calculated from the information given in the question.
The actual resistance depends on how efficient the motor is required to be. Efficiency has to be traded against the mass and cost of the motor, because lower resistance for greater efficiency requires thicker, heavier copper wire.
In practice, higher-powered motors are usually made more efficient in order to reduce the energy wasted in the resistance. For low-powered motors it isn't worth it because they don't waste much energy anyway.
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An important difference between a universal and a split-phase motor is that the split-phase motor has?
two windings on the stator
What are the constructional features of a 3 phase induction motor?
stator,roto
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.
Can you change the stator direction of 3 phase squirrel case motor?
yes by reversing phases
Why there is no starting torque for synchronous motor?
The 3 phase supply is provided in the stator of a synchronous motor which produces a rotating magnetic field.The stator has field poles(North and south). Now due to the rotating magnetic field the current is induced in the rotor of the motor as due to ampere's law, so the motor tends to move.Now as the stator poles induces opposite poles on the rotor, after moving the first pole pitch the rotor gets repelled by the opposite stator poles and due to the heavy inertia of the rotor it can't respond and the motor is standstill.Hence the synchronous motor is started with the help of an auxiliary motor or such called a pony motor to overcome this problem.
An important difference between a universal and a split-phase motor is that the split-phase motor has?
two windings on the stator
Why do you use codenser in fan?
fan is a capacitor start capacitor run single phase induction motor. since single phase induction motors are not self starters, caused by discontinuty in stator mmf. so to iniate rotation single phase supply is splitted 90 degree apart by a capacitor to convert it to a 2 phase motor, which produces a continued synchronously revolving mmf in stator to start the motor. cool !!
What happens if 3 phase supply is given to stator and rotor both in a induction motor?
its impossible to give suppy to rotor of an induction motor,because of it a closed path for circulating currents.
What are the constructional features of a 3 phase induction motor?
stator,roto
Single phase motor speed is determined by the?
Motor's number of poles.
What happen if we do the 3 phase winding in rotor of induction motor and give the 3 phase supply only stator winding?
This is how an induction motor normally works, hence the name. The supply voltage is connected to the stator winding(s) and a current is induced in the rotor. A synchronous motor, on the other hand, will have current supplied to the rotor through slip rings and brushes. The rotor current is generally supplied as DC though, or else rectified in the rotor.
What are the main parts of three phase motor?
Wire, bearings, rotor and stator.
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 winding is connected to stator in ac motor?
in 3 phase motor u1,v1,w1 give to the short terminal and remaining v2,u2,w2 give t0 the in coming power supply of 440v
How do you start a three phase motor to a single phase power supply?
You don't. A three phase motor will not start unless it is connected to a three phase supply.
Is 3 phase motor run on 1 phase supply?
No. That would be a single phase motor.
What are the causes for unbalance of currents of a 3 phase a c motor?
unbalance voltage supply resistance between phase unbalance joints of coil loose winding short with body
