What is windage loss

There are two causes of windage : The object is moving and being slowed by resistance from the air. The term can refer to: The effect of the force, for example the . As surface speeds of electrical machinery increase to meet ever more demanding application requirements, windage power losses due to shearing of air (or other process fluid) between the rotor and stator take on an increasingly significant role. Losses in PM machines can be divided into three categories: ( a) stator loss, (b) rotor eddy current loss, and (c) windage loss.

The stator loss consists of copper loss and iron loss.

The copper loss includes conventional I2R loss .

As rotational speeds and rotor tip speeds increase, these rotors must operate in low air pressure environments to minimize windage losses and .

Hshed determinations of windage losses. The density and viscosity of the medium in which the wheel rotates are therefore the only ones of its physical properties which we need to take into accotmt,. The proposed structure can pump out the air from within the sealed space of the motor housing by using the pumping effect of the spiral . Friction and windage losses in electrical machines.

Find out information about windage loss. In this paper, an empirical windage loss . PM motor used in the Toyota Prius. This paper presents the experimental of using He. Helium reduces the loss much more, but its electric breakdown voltage is the lowest.

To predict the performance of improved SRM rotor, the parametric finite element analyses are needed to get inductance profiles of the proposed rotor shape. The calculated values are compared . The Pennsylvania State University. CFD Approaches Aimed to the Reduction of the.

Windage Power Losses of Ordinary Gears: Different. In an air cooled motor, these losses are caused by turbulence in the air acting against the rotation of the rotor. Examples of these are armature slots or geometries that are not cylindrical or fans.

These effects are therefore referred to as , and in practical applications, . Some directed blower action for cooling the generator . Effects of air jets at the rotor rim were also investigated. Mechanical Engineering Department, ECAM, France. The characteristics of the radial and axial air-gap flows have been of general interest in many . To reduce the windage loss , two . Abstract—A Switched Reluctance Motor (SRM) is one of the candidates of rare- earth-free-motors for hybrid electric vehicle. An SRM has been developed with exact IPMSM dimensions with competitive maximum torque, operating area, and maximum efficiency.

However, considered windage loss of around 1. Both the stator and rotor laminations have an insulated coating to reduce shorting losses (eddy current) from adjacent laminations.