Pre charge resistor switch
How about using a MCB + latching motor switch?

Switches look like this:





MCB sits in between of power supply and the rest of the setup. Latch switch sits in parallel of the resistor:



To turn the motor ON, you lift the MCB and then press the latch switch after a second or two (depending upon the time it takes for charging). It provides additional protection in case of short circuit as well. In a power cut, the latch switch will automatically unlatch. Manually press it again to restart the motor.