Timeline for DC motor as a generator as a torque limiter?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 16, 2015 at 15:47 | vote | accept | Squatch | ||
| Mar 16, 2015 at 2:35 | comment | added | sparky Al | An easier solution would be to burn the energy in a DC motor with a fan. (couple the dc motor to the generator) Fans consume very little power at low rpm, but much more power as the voltage increases. Another method for your application is a centrifugal brake. | |
| Mar 16, 2015 at 2:22 | comment | added | sparky Al | If the weight is the same, after accelerating, the speed will be constant. The generator will have constant torque. If you change the weight, and the resistance is same, the speed will be different. I would use something with a higher wattage than a potentiometer. You can use the output from the generator to measure the speed. Voltage or frequency. The higher speed will produce higher voltage, and higher frequency (pulsating dc). You can then get a solid state variable resistor. | |
| Mar 16, 2015 at 1:04 | answer | added | WhatRoughBeast | timeline score: 0 | |
| Mar 16, 2015 at 1:02 | comment | added | Austin | This should work. You would need some kind of feedback if you want to maintain an exact speed. Also note that you are limiting speed, not torque. The torque would be constant in that scenario (weight*radius of pulley). | |
| Mar 15, 2015 at 23:42 | review | First posts | |||
| Mar 16, 2015 at 0:14 | |||||
| Mar 15, 2015 at 23:42 | history | asked | Squatch | CC BY-SA 3.0 |