Thanx Darryl, coulda used to bring you along on my motor field day trip, The results you see are mainly a function of this characteristic and not efficiency, though efficiency does play a significant role. If you needed a motor to turn at 10,000 rpm with 12 v applied, it would be wound up for a PV of about 830. It all depends on the application, the size and configuration of the motor. PV is 37.5.Ī windshield wiper motor I tested runs at about 3000 rpm at 12v. Another rated at 160 volts is rated at 6000 rpm. One has a voltage rating of 90 vdc, and a stated rpm of 5000. You're seeing the effect of one motor producing a higher voltage with a certain shaft speed than another motor does, and in addition one motor will turn faster than the other with a certain voltage applied.Ī fairly common motor is used in treadmills.
If you connected two identical motors and turned one, the other would turn in response at some rpm, and turning the other would give the same response in the first motor. If you turned the motor twice as fast, the voltage generated would about double. This isn't a hard and fast rule, but it also applies when the motor is turned and the voltage read on a meter. If 10 volts were applied, it would turn at 10,000 rpm. A typical figure is 1000- that would mean the motor turns at 1000 rpm with one volt applied. There's a figure used in rc modelling called PV, and it's the ratio of rpm to applied voltage. A higher voltage motor will generate a higher voltage at a lower rpm than a lower voltage motor at the same rpm. I never thought these would work like they were directly connected and so slowly - question for the Motor guys - is this not a sign of great efficiency or what.ĭc permag motors will generate if the shaft is turned, as you have seen. Here's what "shocked me" yesterday, after hooking up both motors and finding out i was screwed I was just playing with the resistance of the two, just hand turning the shaft while the wires were crossed and it seems as if the 24 had more resistance, then for the hell of it I hooked the two to each other - they are good size units - 3 1/2" OD and about 7" long, I twist the shaft of one and its like the other is hooked up to it with a coupling, Were talking extremly low RPM, I never would have guessed they would function like this, then I notice the ratio change, If I do the 24 a half turn the 12 goes way beyond half and closer to full, its the opposite when I do the 12 - then the 24 goes about a quarter. half so im guessing its a 12?Īnyways, I will have to go find another 24 volt or a bigger single unit, I plan on using the energy to run a electric car radiator fan to keep me cool while training and also get a reading of volts and amps as this coupled with my heart rate monitor will give me a fairly stable environment to test my experimental cranks this winter, The 24 V is ideal for the gearing that I have because it will hover at around 14 volts ( if i can keep the right resistance for me)
I know one is a 24 volt because it still has its ID case, but if I turn the other at the same RPM's its voltage is aprox. They have also seemed to have taken over the role of the largest content creator after the shutdown of Sodor Island 3D.Im really amazed at these DC permanent magnet motors that iv picked up for my bicycle dynomometer, One was not enough resistance so I went to the surplus store to get another and was going to link the two together and wire parallel, I found they are different voltage as I checked them at the same RPM's hooked to the Mill spindle, Since 2018, they have been creating characters for Trainz 2019. The team have now switched to another website and are making more content then ever, on par with Sodor Island 3D. It was assumed that it was the end of the team but to many's shock, new content was uploaded in 2014. They also modified models from the Hero of the Rails Wii game for Trainz.Īt the end of 2012, the site when on a long hiatus of releasing content. They were also the first content creator to create a publicly available model of Diesel 10. Some of their early characters were Spencer (a reskin of the LNER Mallard), Atlas (the mines engine), Whiff, Victor, the Class 40 Diesel (from Bowled Out) and Eagle (reskin of James). Their site had a mix of reskins and original models. Sodor Workshops was founded on J(after SI3D).
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