Method for frequency changer controlling of industrial truck for cold operating environment, involves controlling frequency changer by controlling device when fixed minimum operating temperature falls

摘要

The method involves controlling a frequency changer (11) by a controlling device when a fixed minimum operating temperature falls. The frequency changer is controlled in such a manner that a direct current component flows in all phases of the frequency changer. The direct current component generates power dissipation without generating the rotary field that drives a three-phase motor. An independent claim is included for an industrial truck, which has a power supply unit.