I'm currently an electrical engineering student working on building a 3 degree of freedom motion simulator using three 90V DC Stepper Motors. Each motor can draw up to 5 A so I need to find or build a 90V DC power supply that can handle up to 15 A (1.35 kW). I've tried looking around for an already built power supply that I could buy but for this amount of power these become very expensive (~$3000). I'm working for a client whom recommended that I use a Dual IGBTMOD H-Series Module (Datasheet: http://www.pwrx.com/pwrx/docs/cm50dy-12h.pdf) to convert 120 VAC to 90VDC.
The picture above shows the schematic for the module and I've tried searching for circuit diagrams of power supplies using similar modules and but I haven't been able to figure out how these work. From my understanding I imagine that 120 VAC would connect to C1 and E2 terminals and a PWM signal would be fed to the gates G1 and G2 to get the desired output at C2E1. However this is just speculation and I'm not sure if what I'm thinking is completely wrong or if there may be a better solution altogether. Any help would be greatly appreciated, thanks.