Controller for dynamically allocating regenerative power to a rechargeable power supply of an elevator
First Claim
1. A controller for dynamically allocating delivery of regenerative power to a rechargeable power supply of an elevator system comprising:
- a converter for rectifying AC power of an AC power source to DC power;
an inverter for converting the DC power to AC power having a variable voltage and a variable frequency for driving an electric motor to operate an elevator during powered operation of the elevator;
DC buses connecting said converter to said inverter;
a power accumulating device connected across said DC buses and accumulating DC power from the DC buses during regenerative operation of the elevator and supplying DC power to the DC buses during powered operation of the elevator;
bus voltage measuring means for measuring bus voltage across said DC buses;
charging-discharging control means for controlling charging and discharging of said power accumulating device with respect to said DC buses and receiving the bus voltage from said bus voltage measuring means; and
charging-discharging state measuring means for measuring state of charge of said power accumulating device, charging and discharging currents of said power accumulating device, charging and discharging voltages of said power accumulating device, and temperature of said power accumulating device, said charging-discharging control means controlling the charging and discharging of said power accumulating device according to the bus voltage measured by said bus. voltage measuring means and at least one measured value measured by said charging-discharging state measuring means.
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Accused Products
Abstract
An elevator controller for stably controlling charging and discharging of a power accumulating device by using a cheap secondary battery having a low capacity, without damaging energy saving effects obtained by charging. The controller of the elevator includes a converter for rectifying AC power 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 to operate the elevator; a power accumulating device for accumulating DC power from a DC bus in a regenerative operation and supplying the DC power in a power operation; a charging-discharging control circuit for controlling charging and discharging operations of the power accumulating device; a series connecting body, arranged between DC buses, and a gate for regenerative current control and a regenerative resistor; a regenerative control circuit for controlling operation of the gate for regenerative current control; and a charging discharging state measuring device measuring charging and discharging state of the power accumulating device.
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Citations
11 Claims
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1. A controller for dynamically allocating delivery of regenerative power to a rechargeable power supply of an elevator system comprising:
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a converter for rectifying AC power of an AC power source to DC power;
an inverter for converting the DC power to AC power having a variable voltage and a variable frequency for driving an electric motor to operate an elevator during powered operation of the elevator;
DC buses connecting said converter to said inverter;
a power accumulating device connected across said DC buses and accumulating DC power from the DC buses during regenerative operation of the elevator and supplying DC power to the DC buses during powered operation of the elevator;
bus voltage measuring means for measuring bus voltage across said DC buses;
charging-discharging control means for controlling charging and discharging of said power accumulating device with respect to said DC buses and receiving the bus voltage from said bus voltage measuring means; and
charging-discharging state measuring means for measuring state of charge of said power accumulating device, charging and discharging currents of said power accumulating device, charging and discharging voltages of said power accumulating device, and temperature of said power accumulating device, said charging-discharging control means controlling the charging and discharging of said power accumulating device according to the bus voltage measured by said bus. voltage measuring means and at least one measured value measured by said charging-discharging state measuring means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification