Counter torque - PowerPoint PPT Presentation

Polymeric stresses, wall vortices and drag reduction

Polymeric stresses, wall vortices and drag reduction. Ronald J. Adrian. Mechanical and Aerospace Engineering Arizona State University-Tempe. “High Reynolds Number Turbulence”, Isaac Newton Institute, Sept. 8-12, 2008. Co-workers.

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547 views • 32 slides

Back EMF, Counter Torque &amp; Eddy Currents

Back EMF, Counter Torque &amp; Eddy Currents. Example: Back EMF in a Motor. The armature windings of a dc motor have a resistance of 5.0 Ω . The motor is connected to a 120-V line, &amp; when the motor reaches full speed against its normal load, the back EMF is 108 V. Calculate

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995 views • 14 slides

Elementary Two-Pole Motor

Elementary Two-Pole Motor. Elementary Two-Pole Generator. Voltage induced in the coil, e. Flux through the coil window is sinusoidal Φ = Φ max sin( ω t) Voltage induced in coil,e e = N(d Φ /dt) e = N ωΦ max cos( ω t) E max = ω N Φ max E max = 2 π fN Φ max E rms = 4.44fN Φ max.

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240 views • 10 slides

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Counter torque - PowerPoint PPT Presentation

Polymeric stresses, wall vortices and drag reduction

Back EMF, Counter Torque &amp;amp; Eddy Currents

Elementary Two-Pole Motor

Back EMF, Counter Torque & Eddy Currents