Unformatted text preview: t i e as . Determine the b-phase current and the airgap needed to achieve an airgap flux density of ( ) ) 4 8 / cos( 2 . 1 , s e s t t B − + = . Problem 40 – Rotating MMF The conductor turns density of a two phase machine is given by s bs s as n n 2 sin 100 2 cos 100 − = = The a- and b-phase currents are given by ) 400 sin( 5 ) 400 cos( 5 t i t i bs as = = Express the total stator MMF. What is the speed and direction of the MMF ? Problem 41 – Inductance Consider the example on page 58-59 of the distributed winding lecture notes. Find the self magnetizing inductance of the a-phase winding. How does this value compare to asbs L ?...
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- Spring '08
- Magnetic Field, Cos, Physical quantities, Continuous Winding Function, b-phase winding function