Recent content by rjnoonan

the torque and velocity want to track with the voltage/current in a linear fashion but the level of saturation in the mag field and the effect of heat on conductance will insure that they cannot track linearly so, as you have surmised, the efficiency will change with voltage/current.

85% of the power is being converted to mechanical energy. The other 15% is going to become heat. I think it's a tricky question; all of the input power will be converted to energy, but 15% will be wasted as heat. Definition of efficiency of the motor.

since he is spec'ing a sine wave go ahead and assume we are looking at the full sinusoidal wave and using peak to peak. so answer will be 1.414 times 2vrms for peak to peak voltage.

Luigi, for a sine wave, .707 times peak = rms (peak); .707 times ptp = rms (ptp) the question says volts = 2v rms but doesn't spec peak or ptp. is 2vrms peak or ptp? we don't know. 2 answers.

problem did not state whether 2vrms was peak or peak to peak. if peak, 1.414, if ptp then 2.8

volts rms are = to .707 of peak; so 1/.707 x 2 will give you peak. ptp is twice that.