This is a switching circuit used for a switched reluctance motor.

At the right hand side, there's a 560 ohm resistor at the gate of the IGBT. I thought IGBT's had high impedance and therefore wouldn't need a resistor at the gate, so what is the need for that resistor is this type of circuit and why that value of resistor?

Also the 47μF capacitor at the right hand side. Why is that there, what is its function? Is it for harmonics or ripple or something?

 

Here is some information from component manufacturer Infineon...

http://irf.custhelp.com/app/answers/detail/a_id/215

 

Do you know why the capacitor is there? What is its function?

 

Can often be used to maintain stability in the supply as the motor is turned ON and OFF.