'Counter torque' presentation slideshows

Polymeric stresses, wall vortices and drag reduction

523 views • 32 slides

Back EMF, Counter Torque & Eddy Currents

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

960 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 ? = ? max sin( ? t) Voltage induced in coil,e e = N(d ? /dt) e = N ?? max cos( ? t) E max = ? N ? max E max = 2 ? fN ? max E rms = 4.44fN ? max.

222 views • 10 slides