I am trying to control a 1/3HP 12VDC motor using PWM, which is input into a dedicated IGBT driver(Vout -5 to +12), which then in turn should fire my IGBT. Without the IGBT connected everything seems to work fine, PWM signal is perfect and my IGBT gate drive signal is perfect.
My problem is that when the IGBT and motor are connected it only responds at 85% + PWM. Anything below 85% and the motor is totally off.
Has anyone experienced this before? Here are the links to he IGBT, driver IC, and my schematic.
IGBT-(Way overkill but I had one laying around)
PWM_IGBT.pdf (14 KB)