Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - No back-EMF DC motors?

dcb · 09-03-2010, 07:27 PM

That was a sad video, didn't demonstrate anything conclusive or useful, it didn't make the motor do any measured amount of work with a measured amount of power. Not even a diagram of the "concept". Comments are disabled because it would get torn up for being such a piece of B.S.

Without measuring both input and output power you cannot tell how efficient it is. This guy does not strike me as a scientist.

1hp=746 watts. This is not a measure of efficiency, just a conversion factor.

If the motor had zero back emf, would it not keep speeding up till it disintegrated?

Looks pretty steady state to me. Thar be back EMF in that motor.

09-03-2010, 07:27 PM	#22 (permalink)
dcb needs more cowbell Join Date: Feb 2008 Location: ÿ Posts: 5,038 pimp mobile - '81 suzuki gs 250 t 90 day: 96.29 mpg (US) schnitzel - '01 Volkswagen Golf TDI 90 day: 53.56 mpg (US) Thanks: 158 Thanked 269 Times in 212 Posts	That was a sad video, didn't demonstrate anything conclusive or useful, it didn't make the motor do any measured amount of work with a measured amount of power. Not even a diagram of the "concept". Comments are disabled because it would get torn up for being such a piece of B.S. Without measuring both input and output power you cannot tell how efficient it is. This guy does not strike me as a scientist. 1hp=746 watts. This is not a measure of efficiency, just a conversion factor. If the motor had zero back emf, would it not keep speeding up till it disintegrated? Looks pretty steady state to me. Thar be back EMF in that motor. __________________ WINDMILLS DO NOT WORK THAT WAY!!!