Industrial truck has main drive which comprises at least one three-phase motor and inverter, which can create an at least three-phase voltage system of variable voltage and frequency

摘要

The industrial truck has a main drive which comprises at least one three-phase motor (1) and an inverter (3), which can create an at least three-phase voltage system of variable voltage and frequency. With the three-phase motor stopped, at least one phase P2 of the inverter is cyclically controllable so that via components for voltage smoothing and an isolator (12) the operating voltage of the auxiliary drive (2) is made available as direct voltage.