Hi Richard,

I can see why you would think that, but it doesn't appear to be the case... remember the choke is only on the trigger side of the circuit.

The most significant observation of the motor's new behaviour is the absence of self resonance.

This leads me to believe that the relay/choke is blocking high frequencies.

Normally, as the rotor accelerates, there are multiple pulses per magnet (lets say 3 for example). Amp draw slowly increases as the rotor accelerates but then during accelleration there is an amp drop and then it starts rising again as the rotor continues to accellerate. I think this amp drop is caused by the number of pulses per magnet decreasing as the rotor speeds up. So then there are two pulses per magnet and the rotor continues to accelerate then there is another amp drop. Now the coils (should be) pulsing once per magnet.

But with the relay/choke in the circuit, it prevents high frequencies so even during the very low rpm at the start there will be only one pulse per magnet. The choke blocks multiple pulses per magnet. This is why I think acceleration is so slow in comparison but maximum RPM doesn't appear to have dropped.

and because of the imperfections of my rotor, my coils were probably pulsing multiple times on certain magnets and once on others with out the choke. But now with the choke it can only pulse once per magnet and this is what i believe to be the reason for the overall drop in amps.

Tach coming this week, but as aaron says, an occiloscope would probably be handier!