Got my 40 volt TDMs in yesterday. Chucked one in the drillpress for some tests. Here are the results:
Nominal 12 volt charging into 440 AH of batteries @12.1 volts
RPM Open Volts Amps into 12.1V Watts
210. 7.5V 0 0W
305. 11.4V 0A 0W
450. 16V 1A ~12W
530. 22V 3.1A ~37W
900. 28V 5.2A ~63W
Nominal 6 volt charging into 220 AH of batteries @6.05 volts
RPM Open Volts Amps into 6.05V Watts
210. 7.5V .25A 1.5W
305. 11.4V 1.25A 7.5W
450. 16V 3A ~18W
530. 22V 5.4A ~32W
900. 28V 7A ~42W
Well these numbers are quite interesting. I expected higher voltages at lower rpm but that was not the case.
What appears to be the case is it produces better current lower in the range and actually outperforms the 30 volt motors for 6 volt charging and has a better top end performance curve. It looks to be producing 25% more than the 30 volt motor @ 900 rpm!
Cheers.
TomW