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...

Examples

Embodiment Construction

[0023]According to Figures 1-3, the working principle of the operating method of the present invention and the specific structure of the operating device are described in detail. The elevator escalator group variable frequency drive unified power supply and energy-saving operation method is to use the same AC / DC converter 2 that converts the AC power of the grid into a DC power. After it is connected in parallel with the braking unit 9, the DC power is connected through the common DC bus 7. Supply multiple DC / AC frequency converters 13 or 17 in elevators and escalator groups in a unified manner to control the motors 14 or 18 that drive the corresponding elevators and escalators 15 or 19 to operate. This method uses a common DC bus 7 to uniformly supply power to the variable frequency speed controllers 13, 17 and motors 14, 18 that control all elevators and escalators 14, 18 in the group, and thus form the energy exchange between the drive units in the group. aisle. Using this chan...

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...

Examples

Embodiment Construction

[0023]According to Figures 1-3, the working principle of the operating method of the present invention and the specific structure of the operating device are described in detail. The elevator escalator group variable frequency drive unified power supply and energy-saving operation method is to use the same AC / DC converter 2 that converts the AC power of the grid into a DC power. After it is connected in parallel with the braking unit 9, the DC power is connected through the common DC bus 7. Supply multiple DC / AC frequency converters 13 or 17 in elevators and escalator groups in a unified manner to control the motors 14 or 18 that drive the corresponding elevators and escalators 15 or 19 to operate. This method uses a common DC bus 7 to uniformly supply power to the variable frequency speed controllers 13, 17 and motors 14, 18 that control all elevators and escalators 14, 18 in the group, and thus form the energy exchange between the drive units in the group. aisle. Using this chan...

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