@Krindor increasing the inductance in a circuit means increasing the time it takes for current to increase or decrease with applied or removed voltage.
so for example at 50% duty cycle, the battery could be supplying pulses of 60a, half the time, which averages to 30a. the battery side of the circuit has low inductance and so the current can ramp up to 60a and down to 0a very quickly.
on the motor side, the inductance is very high, so when the current from the battery shuts off, the circuit is rewired/switched so that the leads coming from the motor forms a loop, which allows the current to flow inductively (without applied voltage) for a short time.
the time scale of the on-off pulses from the battery are so short in duration that during the off times when there is no battery current, the current continues to flow in the motor entirely from the inductance.
so 60a from the battery half the time (30a average) can result in 60a in the motor the whole time, because the current still flows in the motor inductively while it is not flowing from the battery, but we say the 60a the motor sees the whole time is half the voltage of the battery if the duty cycle is 50%.
hope this helps.