User:Vivek Shakthi Eswara Moorthy/sandbox

Carter's Co-efficient

The Carter’s Coefficient is a parameter that is used for the estimation of contracted or effective slot pitch in case of [|armature] with open or semi enclosed slots. It is denoted as 'Kcs'.

It is the function of the ratio Wo to lg where "Wo" is the slot opening "lg" is the air gap length.

Kcs=Wo/lg

The Carter’s gap co-efficient (Kcs) is the ratio of slot width to air gap length.

The below formula gives the value of Kcs directly Kcs = 1/1+ (5lg/Ws)

For parallel sided open slots, Kcs = 2/π[ tan -1 y – 1/y log √(1+/y2)]

where y = Ws/2lg.