Patent ID: 7837011

Claim:
An elevator control device comprising: a rectifier circuit that converts an AC voltage from an AC power source to a DC voltage; a DC capacitor that smoothes ripples of said DC voltage; an inverter that converts a smoothed DC voltage to an AC voltage of variable voltage and variable frequency; a motor that is driven by said AC voltage that is output from said inverter to raise or lower a passenger cage; a resistance chopper that is connected in parallel with said DC capacitor; and a drive control unit that controls said inverter or controlling said resistance chopper such that said AC voltage of variable voltage and variable frequency is output in accordance with a speed instruction; an electric double layer capacitor having an electrostatic capacitance that is substantially larger than that of said DC capacitor and that is connected in parallel with said DC capacitor, and capable of accumulating substantially all of a regenerated power from said motor; a voltage detection unit that detects a terminal voltage of said electric double layer capacitor, and an initial charging circuit connected in series with said electric double layer capacitor, and said initial charging circuit including a switch and a resistance connected in parallel to each other, said drive control unit employing a voltage in a vicinity of a rated voltage of a electric double layer capacitor as a drive voltage of a resistance chopper and operates and controls said resistance chopper when a terminal voltage detected by said voltage detection unit reaches a voltage in a vicinity of said rated voltage of said electric double layer capacitor, and said drive control unit charging said electric double layer capacitor while restricting a current during current passage from said AC power source due to said resistance when said switch is turned off on commencement of current passage from said AC power source and that connects said electric double layer capacitor in parallel with said DC capacitor when said switch is turned on after a required time after commencement of passage of current by said AC power source.