Abstract: An exemplary method for operating a converter to supply electrical power to a load includes controlling the converter for a provided overload time so that overload power is applied to the load, and controlling the converter for a provided resting time, so that resting power is applied to the load. The overload power is higher than a nominal power which corresponds to a steady-state operation limit of the converter, wherein the resting power is lower than the nominal power.

Abstract: In an elevator installation based on the rucksack principle the elevator car is suspended laterally. The elevator car is supported by a car frame which is guided on the car guiderails and suspended on the suspension rope. The drive unit is located partly in a first wall niche and partly on a support. A traction sheave of the drive unit projects into the elevator hoistway. The elevator car is connected to the counterweight by the suspension rope which is guided over the traction sheave and deflector sheaves. Located above the drive unit in the first wall niche is a controller cabinet. The drive unit and the controller cabinet are accessible from the landing via a maintenance door. The drive unit and the controller cabinet are arranged diagonally on the bottom floor, as a result of which the hoistway cross section can be optimally utilized.