What is windage loss?

Windage loss in a generator is the power absorbed by the fluid surrounding the rotor. as a result of the relative motion between the rotor and the stator.

What causes windage loss?

Windage loss in rotatory machines occur due to air resistance to the armature. Therefore, in order to even start a motor, the machine needs to overcome friction and windage torque and inertia due to its weight to start rotating.

What are friction and windage losses?

Friction and windage losses are caused by friction in the bearings of the motor and aerodynamic losses associated with the ventilation fan and other rotating parts. Variable losses consist of resistance losses in the stator and in the rotor and miscellaneous.

What is windage loss in motors?

Windage loss is the reduction in efficiency due to windage forces. For example, electric motors are affected by friction between the rotor and air. Large alternators have significant losses due to windage. To reduce losses, hydrogen gas may be used, since it is less dense.

What is windage loss in dc machines?

If N is the speed, then the windage loss in dc motor is proportional to square of armature speed. Windage losses occur due to the air inside the rotating coil of the machine. Eddy current losses are proportional to square of speed.

Mechanical loss I Windage Friction Loss I Power Stages of induction motor Part_B I Diploma semester

What is meant by windage?

Definition of windage

1a : the space between the projectile of a smoothbore gun and the surface of the bore. b : the difference between the diameter of the bore of a muzzle-loading rifled cannon and that of the projectile cylinder.

What is rotational loss?

Definition of rotational loss

: the power or energy loss incurred by friction and windage as an object is revolved.

What is friction and windage losses in induction motor?

The eddy current losses can be reduced by using the laminated cores instead of solid ones. Friction and windage losses: These losses are also constant losses as these losses depend upon the speed of the induction motor. The speed of the induction motor is approximately constant.

How do you calculate friction and windage loss?

1. Multiply current, A, by the driver motor's torque constant to get the total friction and windage torque, oz • in. 3. Subtract the driver motor's friction and windage torque from the total friction and windage torque to get the test motor's friction and windage torque.

What is windage heating?

This paper has experimentally and numerically studied the windage heating in a shrouded rotor-stator disk system with superimposed flow. Temperature rise in the radius direction on the rotating disk is linked to the viscous heating process when cooling air flows through the rotating component.

What is friction loss in pipes?

Friction loss is a measure of the amount of energy your piping system loses because your fluids are meeting resistance. As fluid flows through your pipes, it carries energy with it. Unfortunately, whenever there's resistance to flow rate, it diverts fluids and energy escapes.

What is friction loss in machine?

Mechanical friction losses are being reduced by converting sliding metal contacts to rolling contacts, reducing the weight of moving parts, reducing production tolerances to improve the fit between pistons and bore, and improving the lubrication between sliding or rolling parts.

What is friction loss of a motor?

These losses are attributed to the force it takes to overcome the drag associated with rotating the motor's rotor or armature. Examples of friction losses are friction of bearings, bushings or brushes in a universal or brushed type DC motor. In general, the frictional losses are proportional to the rotor speed.

What is the difference between windage and elevation?

When shooting a rifle, windage measures the horizontal distance of the impact point from the target, and elevation measures the vertical distance of the impact point from the target.

What is windage area?

The windage area of a vessel or offshore structure is the area that is exposed directly to the wind. As is obvious, this is the area of all items above the waterline. This will include. Part of the hull/offshore structure above the waterline.

What are the two 2 main types of losses in A motor?

There are two main kinds of losses in electric motors, which are often referred to as iron losses and copper losses. Dealing first with iron losses, these are made up of two 'components', namely eddy current losses and hysteresis losses.

What factors does the friction and windage loss depend upon?

9. What factors does the friction and windage loss depend upon? Explanation: This loss consists of the bearing friction and rotor windage loss. The loss depends upon the type of construction, speed and ratings of the machines.

What is iron loss in motor?

Iron losses can be divided into hysteresis losses, eddy current losses and additional losses. Iron losses are given per weight and depend on the frequency and the maximum flux density. This means that the faster the motor rotates, the higher the iron losses.

What is rotational losses in induction motor?

Rotational losses

The friction and windage losses are zero at the start. As the speed increases, the losses also start increasing. The sum of the friction, windage and core losses are almost constant with the change in speed. These all losses are added together and are known as Rotational Losses.

What is stray loss?

Stray load loss: The combination of friction losses due to moving of bearing and shaft and windage losses due to air gap is called stray loss.

What is stator loss?

These losses occur due to current flowing in stator and rotor windings. As the load changes, the current flowing in rotor and stator winding also changes and hence these losses also changes. Therefore these losses are called variable losses.

What is mechanical loss?

As their name suggests, mechanical losses are caused by movement of the motor. These include the friction in the motor bearings, friction between the brushes and the commutator, and drag on the rotor caused by turbulence of the air around it (sometimes referred to as windage loss).

What is windage in injection molding?

Windage allows you to bias your mold, whether you are off one way or another, to come back to center. Because you are doing some guess work with bringing the mold back to center, you may need to adjust a few times to accommodate your mold.

What is Blowby losses?

The blow by losses is the phenomenon of leakage of combustion products past the piston and piston rings from the cylinder to the crankcase.

Why is friction loss important?

The amount of head pressure which is lost due to friction is often called “friction loss”, and this is a critical part of choosing necessary equipment. It is also an essential part of setting the power level of your pump. The higher the flow rate, the more energy is lost through friction.