Hello I would be glad for help building a pulsecontroller to my new motor. I have tried with relays, solid state relays, igbt's and transistors. My knowledge to electronics is very bad, and all that has happened is blown fuses (16Amp), burned relays, and exploded transistors. Or nothing happens... I have attached a pic that show the essential of the circuit. The relays are triggered from a PLS, that has 24V DC output signals. The input signal from motor to PLS is via a inductive sensor. That part is all OK. The problem is giving the capacitor its charge, and then pulse the charge to the electromagnet. The measured resistance of the electromagnet is 5.1 ohm. At this moment I am using only 230V AC from wall outlet, but are planning to use 1500V DC and 3000V DC at a later stage. I have bought 2 IGBT's, irg4pc40s ( http://download.siliconexpert.com/pdfs/transistor/inr/irg4pc40s.pdf ) that I think should be enough at this moment. Pulsed amps is 120 @ 600V. I have read that IGBT's are "new version" of spark gaps. Is there anybody that can help me with a complete circuit with these IGBT's?