/diy/ - Do It Yourself

Pic related, what kind of booster stage should I use to provide enough base current to drive the transistor array? Can I use a P-channel MOSFET for this task? Is this how IGBTs work (FET drive stage + BJT power switch)?

Going one step further: What kind of circuit would I need to be able to control the amount of base drive current going to the transistor array with microcontroller GPIO pins? I was thinking that combined with a current sensor, the microcontroller could select a suitable base current depending on the motor load. The amount of torque produced by the motor is proportional to the current consumption.