Elevator staircase group frequency conversion drive united power supply energy-saving operation method and apparatus

Abstract

A method and mechanism for unified power supply and energy-saving operation of variable-frequency drive for escalator group adopts one AC/DC transducer in parallel connection with a braking unit to provide DC power source to multiple DC/AC variable-frequency speed regulators and motors in the group that control all elevators and escalators; therefore forming a channel for energy exchange among various drive units in the group to provide electric energy in the drive units in power-generating operation in the group to other drive units that are in the state of electrically-driven operation. The invention effectively solves the problems in prior art such as energy waste and liability for power grid to contamination. The operating method has a reasonable design and simple structure with safe operation. Compared to operating methods and devices of its kind, the operating method enables the electric energy fed back by the downward escalators to be utilized by the upward escalators, thus reducing the power supply of the electric network, achieving evident energy saving effects, and meanwhile ensuring stable operation of the electric network and reducing the manufacture cost of the device.

Description

Technical field [0001] The invention relates to an energy-saving operation method and device for elevators and escalator groups. In particular, it is an energy-saving operation method and device for variable-frequency drive of elevators and escalator groups with unified power supply. It is characterized by group control of multiple elevators and escalators, the use of a unified power supply DC bus, so that the elevators and escalators in the power generation operation state are fed back to the elevators and escalators in the electric operation state, and the feedback power is effectively used to achieve energy saving. purpose. Background technique [0002] The development of modern construction industry has greatly increased the number of elevators and escalators in buildings. Generally, more than two elevators or escalators are installed, and large buildings can sometimes have as many as dozens of elevators or escalators. The so-called group refers to two or more elevators and e...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an elevator and escalator group frequency conversion drive unified power supply energy-saving operation method and device, which effectively solves the problem of the large waste of energy caused by the use of braking resistors in the existing independent drive methods and the high cost and disadvantageous use of energy feedback devices. It may cause grid pollutio

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