Great! now you should see if you are getting more (or less) power out than you put in to make the motor spin.
harry ----- Original Message ----- From: Horace Heffner <[email protected]> Date: Monday, August 3, 2009 7:23 am Subject: Re: [Vo]:Marinov BB motor test problems > > On Aug 2, 2009, at 8:21 PM, Kyle Mcallister wrote: > > > > Keep us posted as to your results. Very interesting, to me at least. > > > > --Kyle > > > Here's the full write-up updated through today's experiments: > > http://www.mtaonline.net/~hheffner/HullMotor.pdf > > It has links to videos of the control (ordinary magnetic bearings) > and live (non-magnetic stainless steel bearings) runs. > > A couple 24 hour washes, one mineral spirits, the other acetone, > cured the intermittent conduction problem. > > I'll have to reduce or eliminate the current sense resistor to have > a > chance get the series run to work. I'm not sure it is necessary to > > make a series run however. It is clear from the videos that the > non- > magnetic bearings don't produce torque. In fact, when current is > applied they brake, probably due to the arcing. In both live and > control runs a grinding noise can be heard as power is supplied, > and, > based on the breaking effect for the live run, I expect it is > probably due to arcing. > > I have realized that the videos don't have to be very convincing, > because anyone who wants to convince himself can order the bearings > > and try it himself. > > Best regards, > > Horace Heffner > http://www.mtaonline.net/~hheffner/ > > > > >
