Elevator power management to augment maximum power line power
First Claim
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1. A system, comprising:
- a power line connected to a power grid;
a motor connected to the power line and configured to receive power from the power line to drive an elevator;
an alternative power source connected to the motor; and
a power control system configured to control the power line to supply power to the motor to drive the elevator, to detect a predetermined threshold value of power supplied from the power line, and to supply both power from the power line and power from the alternative power source to the motor based on a determination that the predetermined threshold value of power is supplied from the power line;
wherein the predetermined threshold value of power is a maximum power level able to be supplied from the power line.
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Abstract
A system for managing elevator power includes a power line connected to a power grid, a motor connected to the power line and configured to receive power from the power line to drive an elevator, an alternative power source connected to the motor, and a power control system configured to control the power line to supply power to the motor to drive the elevator, to detect a predetermined threshold value of power supplied from the power line, and to supply both power from the power line and power from the alternative power source to the motor based on a determination that the predetermined threshold value of power is supplied from the power line.
24 Citations
17 Claims
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1. A system, comprising:
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a power line connected to a power grid; a motor connected to the power line and configured to receive power from the power line to drive an elevator; an alternative power source connected to the motor; and a power control system configured to control the power line to supply power to the motor to drive the elevator, to detect a predetermined threshold value of power supplied from the power line, and to supply both power from the power line and power from the alternative power source to the motor based on a determination that the predetermined threshold value of power is supplied from the power line; wherein the predetermined threshold value of power is a maximum power level able to be supplied from the power line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An elevator motor power management circuit, comprising:
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a motor controller configured to detect a rotation speed of the motor driving an elevator and to detect whether the rotation speed corresponds to a target rotation speed; and a power controller to detect a power level of a power line connected to a power grid and an alternative power source and to control the alternative power source to output power to the motor in addition to power supplied from the power line upon determining that a power level of the power line is at a predetermined maximum level and the rotation speed of the motor is less than the target rotation speed; wherein the predetermined maximum level is a maximum power level able to be supplied from the power line. - View Dependent Claims (10, 11, 12)
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13. A method, comprising:
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detecting a rotation speed of a motor configured to drive an elevator; detecting a power level of a power line supplying power to the motor; and combining power from an alternative power source with power from the power line to drive the motor upon determining that the power level of the power line is at a predetermined maximum level and a rotation speed of the motor is less than a target rotation speed; wherein the predetermined maximum level is a maximum power level able to be supplied from the power line. - View Dependent Claims (14, 15, 16, 17)
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Specification