Elevator controller controlling charging of a battery power source with regenerative power

A controller of an elevator comprising:

• a converter for rectifying AC power from an AC power source and converting the AC power to DC power;
• an inverter for converting the DC power to AC power having a variable voltage and a variable frequency and driving an electric motor operating an elevator;
• power accumulating means arranged between DC buses of said converter and said inverter, and accumulating DC power from the DC buses during a regenerative operation of the elevator and supplying the DC power accumulated to the DC buses during a power operation time;
• charging-discharging control means for controlling charging and discharging operations of said power accumulating means with respect to said DC buses;
• a series connecting body arranged between said DC buses and including a gate for regenerative current control and a regenerative resistor for discharging regenerated power flowing in through said gate for regenerative current control;
• regenerative control means for controlling operation of said gate for regenerative current control;
• and
• charging-discharging state measuring means for measuring charge and discharge states of said power accumulating means, said regenerative control means controlling operation of said gate for regenerative current control in plural control modes in which an electric current or power flowing through said regenerative resistor is different in accordance with a value measured by said charging-discharging state measuring means.