On one project I once worked on, we had a large electric motor (approx 300 HP) that had to turn a huge 12' diameter wood-chipper, there was so much inertia that It would take about a minute to start up.
The motor had a wire-wound rotor (ie  It was a 3-phase induction motor that instead of having huge copper bars embedded in the rotor to carry the induced currents, this motor had wire winding that were connected to the outside world via brushes.
There was no outside power connected to this rotor, it was only connected to a huge resister box that had a large rotary switch on it that allowed the operator to vary the amount of resistance in the wire-wound rotor circuit.
At immediate start-up, maximum resistance was applied to the armature windings, then as the rotor speed increased, resistance was gradually removed from the circuit, until at full speed the rotor windings were connected to a dead short.
The motor then ran as a regular induction motor.

So maybe an industrial electrical shop would have these resister boxes available. It looked sort of like a bed-spring in a box and was obviously able to burn-off a huge amount of electrical power.

Robin