Regenerative power control for passenger conveyors

A passenger conveyor, power technology, applied in the direction of energy efficiency of escalators, transportation and packaging, sustainable construction, etc., can solve problems such as limitations

Active Publication Date: 2013-08-07
OTIS ELEVATOR CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A disadvantage associated with previous proposals in this regard is that they are limited to relatively lightweight escalator systems
The greater currents associated with heavier escalator motors require relatively ex

Method used

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  • Regenerative power control for passenger conveyors
  • Regenerative power control for passenger conveyors

Examples

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Embodiment Construction

[0009] figure 1 A passenger conveyor 20 is shown. A plurality of steps 22 and handrails 24 facilitate moving passengers between landings 26 and 28 . The exemplary passenger conveyor 20 is an escalator because the landings 26 and 28 are at different vertical positions or heights.

[0010] The exemplary passenger conveyor 20 includes a power control device 30 that controls whether regeneration mode is used during selected operating conditions of the passenger conveyor 20 .

[0011] figure 2 An exemplary power control device 30 is shown schematically. The passenger conveyor motor 32 selectively causes the steps 22 to move in a desired direction (eg, up or down) at a desired speed. The motor 32 operates based on power provided by a power source 34, such as a conventional electrical grid.

[0012] Under certain operating conditions of the passenger conveyor 20 , it may be possible to use the motor 32 to generate electrical power based on movement of the steps 22 , which cause...

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PUM

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Abstract

An exemplary device for controlling power associated with a passenger conveyor motor includes a regenerative drive that is configured to facilitate providing electricity generated by the motor to a power source when the passenger conveyor is moving. The controller determines when an operating condition of the regenerative drive is outside of a desired range and responsively prevents the regenerative drive from facilitating providing the electricity to the power source.

Description

Background technique [0001] An escalator is a type of passenger conveyor. Escalators have proven useful for carrying passengers, for example, between different levels of a building. A typical escalator system includes multiple steps that move based on the operation of a motor and drive system. [0002] In an effort to reduce energy consumption, it has been proposed to operate passenger conveyors in a regenerative mode, where the motor operates as a generator for providing electrical power to the power source as the steps move down. One disadvantage associated with previous proposals in this regard is that they are limited to relatively lightweight escalator systems. The greater currents associated with heavier escalator motors require relatively expensive regenerative drive components for handling the relatively high currents that occur in regenerative mode. The additional expense of such parts often outweighs any cost-saving benefits that can be gained from using regenerat...

Claims

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Application Information

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IPC IPC(8): B66B25/00B66B23/02
CPCB66B25/00B66B25/003B66B23/02Y02B50/24Y02B50/00
Inventor G.马
Owner OTIS ELEVATOR CO
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