I am trying to run a seperately excited dc motor. my field winding is powered via a110vac full bridge straight on to the windings, which is fine. the armiture is powered using a full bridge and a triac on the ac side, to reduce the dc voltage , with the trigger connected to MTS VIA resistors and pot ( little fuse AN1003.16). My armiture resistance is 3.4R. The first thing I did was put a 2k2 resistor inplace of the armiture winding , When I moved the pot the voltage changed from approx 10v to 50v dc on the dc side.
When I connected it up to the armiture the triac stopped conducting. does anyone know why? the triac is a 40A device .
I have had the motor turning with the field winding powered and a power supply across the armiture winding with a voltage of 10v dc
help