Not only does the motor have "torque coming out the ass" even at 0 RPM, but its torque output is actually at its maximum at 0 RPM.
In fact, the torque vs speed curve for a DC motor is a linear function that passes through the points (0 RPM, StallTorque) and (FreeSpeed, 0 ft-lb) where StallTorque is the maximum torque the motor can produce (the rotor is locked under load) and FreeSpeed is the speed of the rotor under no load.
Also of interest is the fact that at either of the extremes, that is, at stall or at no load, the motor is actually performing no mechanical work, despite consuming a (potentially large) amount of electricity.
At any rate, most performance EVs use AC drive systems. My '75 Rabbit conversion, however, uses a 20HP DC motor. And, yes, I can reach and maintain highway speeds (65-70 mph) in a reasonable amount of time.
Why not write a simple program to compare the waveforms of the orignal.wav file, and the decompressed.ogg or.mp3 files. This way the test will not be so subjective (as is the case with the human-ear test that seems to be so popular). Mabye somone has already done this? Or mabye I'm missing somthing...?
Frist off aplogys in advance if this has already been mentioned. One would think that after sitting in persirvitave for such a long time that the brain would be changed from its orignal state. The effect of perservitive on the brain isn't really knowen until we do a good study on it. Hope I made at least some sense! -Jon
Slashdot Mirror
Sure, this is neat, but there are many plants which are monocarpic. Many are also quite long-lived, such as the agave.
Not only does the motor have "torque coming out the ass" even at 0 RPM, but its torque output is actually at its maximum at 0 RPM.
In fact, the torque vs speed curve for a DC motor is a linear function that passes through the points (0 RPM, StallTorque) and (FreeSpeed, 0 ft-lb) where StallTorque is the maximum torque the motor can produce (the rotor is locked under load) and FreeSpeed is the speed of the rotor under no load.
Also of interest is the fact that at either of the extremes, that is, at stall or at no load, the motor is actually performing no mechanical work, despite consuming a (potentially large) amount of electricity.
At any rate, most performance EVs use AC drive systems. My '75 Rabbit conversion, however, uses a 20HP DC motor. And, yes, I can reach and maintain highway speeds (65-70 mph) in a reasonable amount of time.
http://www.eaaev.org/ for some EV info.
Why not write a simple program to compare the waveforms of the orignal .wav file, and the decompressed .ogg or .mp3 files. This way the test will not be so subjective (as is the case with the human-ear test that seems to be so popular). Mabye somone has already done this? Or mabye I'm missing somthing...?
Frist off aplogys in advance if this has already been mentioned. One would think that after sitting in persirvitave for such a long time that the brain would be changed from its orignal state. The effect of perservitive on the brain isn't really knowen until we do a good study on it. Hope I made at least some sense! -Jon