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Why friction and windage loss for an induction motor remain constant with change of stator voltage?
Wiki User
∙ 6y ago
Because the RPM remains same
Wiki User
∙ 6y ago
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What is windage loss in a dc machine?
Friction losses due to airCommentIt's worth pointing out that the windage is pronounced 'wind-age' (i.e. 'wind' as in breeze, not 'wind' as in coil!), and not 'winde-age'.
What are the possible losses for a dc generator?
Friction in the bearings and in the commutator, and windage loss. Electrical resistance of the armature and field windings and the brushes.
What is windage loss of motor?
Windage loss is essentially frictional losses acting on rotating members due to air resistance.
Why short circuit test is done at high voltage side?
1)Short circuit test is performed at rated current. As the rated current on high voltage side is much less than low voltage side, so the rated high voltage side current is easily achieved compared to low voltage side. 2)Also because we cannot short circuit high voltage side, as, if we short circuit high voltage side, voltage of high voltage side essentially falls to zero and since VI=constant, so the high voltage side current will be very high and will burn the winding.
Where does the input power go when the mechanical output power is zero?
either to friction (heat, sound, light) or to internal mechanical changesAnother AnswerPower doesn't 'go' anywhere! Power is simply a 'rate': the rate at which the machine is doing work. If the machine isn't doing work by supplying a mechanical load, then it's output power is zero. However, energy still has to be provided to overcome the losses due to heat transfer from the machine, friction, windage, etc. The rate at which this energy is supplied to the motor is the power of the machine off load.
Why the no-load current of an induction motor is high compared to a transformer?
Because of the presence of the air-gap between stator and rotor in motor the magnetization current is much higher than that of a transformer in addition to the friction and windage losses due to the rotation of the rotor.
What is windage loss in a dc machine?
Friction losses due to airCommentIt's worth pointing out that the windage is pronounced 'wind-age' (i.e. 'wind' as in breeze, not 'wind' as in coil!), and not 'winde-age'.
What is mechanical loss in dc machines?
Friction and windage causes mechanical loss in DC machines.
How induction motor heatup?
The temperature of all electrical devices will result as a consequence of the current passing through its conductors. In the case of motors, further temperature increases are brought about as a result of bearing friction, windage (air resistance), and eddy-current/hysteresis losses in the rotor and stator.
Why need of circle diagram in induction motor?
Circle diagram of an induction motor is plotted set of lines , arcs, and angles graphically depicting induction motor performance, derived from simple no-load and locked-rotor tests. A motor's "conventional" efficiency was determined based on four losses only: stator and rotor I2R, core loss, and friction and windage. Each of them could be evaluated with acceptable accuracy from tests without shaft load, through use of a circle diagram. Other than this all operational performances of an induction motor can be calculated by circe diagram without actually loading the machine.You can not count the advantages of the circle diagram only when you use it.
Is there any windage loss in transformer?
In this context, 'wind', in 'windage', is pronounced as 'wind' -as in 'breeze' or 'gale'. 'Windage means air-resistance, and this only applies to rotating machines, such as generators and motors, whose rotors have to overcome air-resistance (windage) as they rotate. As transformers have no moving parts, they are NOT subject to windage loss!
What are the different kinds of losses in machines?
stray losses,armature copper losses,iron losses(Hysteresis and eddy current losses),mechanical losses(friction and windage losses)
What are the losses have an induction machines?
A three phase induction machine have the Following losses:- 1. Stator core loss 2.Stator Ohmic loss 3.Rotor core loss 4.Rotor ohmic loss 5.Friction losses 6.windage losses 7.Stray losses 8.Also it'll depends upon the types of motor as if it is a slip ring type IM then it will have sparking losses at slip contact etc etc which are very small in comparison to above losses. Regards,,
What are the possible losses for a dc generator?
Friction in the bearings and in the commutator, and windage loss. Electrical resistance of the armature and field windings and the brushes.
What is windage loss of motor?
Windage loss is essentially frictional losses acting on rotating members due to air resistance.
Which dial is which on a mossberg M4D scope windage vs elevation?
Elevation will be the one that moves it up and down. Windage will be the one that moves it from side to side.
How do you adjust windage on AK-47?
By drifting the front sight
