Energy-saving device for elevator

Abstract

The invention discloses an energy-saving device for an elevator. The device comprises an energy storage device, an energy storage device state detector, a charging and discharging circuit and an energy storage device controller, wherein the energy storage device controller performs charging and discharging control on the energy storage device according to the stored energy or residual capacity of the energy storage device at each zero power point in subsequent operation of the elevator, and an estimated value of the consumed or generated power and energy of an elevator motor between adjacent zero power points or in an interval from the current moment or position to the nearest zero power point. The energy of the elevator can be saved through electric energy release and regeneration energy storage, and power and energy consumed or generated when the elevator finishes the operation can be estimated at the specific moment, so that the operation load of a processor, the severe fluctuation of bus voltage and the charging and discharging current impact of the energy storage device are effectively reduced, and the capacity of the energy storage device can be fully utilized.

Description

technical field [0001] The invention relates to an elevator energy-saving device, in particular to an elevator energy-saving device utilizing an energy storage device. Background technique [0002] In recent years, by properly controlling the energy storage device added to the main circuit of the elevator drive to store regenerative energy during the regenerative operation of the elevator motor and release the stored energy during the electric operation of the elevator motor, thereby providing electric energy for the electric operation of the elevator motor To solve the problem of processing the regenerative energy generated in the operation of the elevator motor, and to realize the energy-saving effect of the elevator has become a research hotspot in the elevator industry, such as the Chinese invention patent application publication specification CN 101381046A, CN 1845417A, CN1946625A, the Chinese invention patent specification CN 100593504C, CN 100450907C, CN1229275C and i...

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Problems solved by technology

[0006] Therefore, it is necessary to develop a method that can use the energy storage device to process the regenerative energy generated during the operation of the elevator and reduce the energy consumption of the elevator. Data storage capacity, making full use of the electric energy consumed by the elevator this time or the regenerative energy to be generated and its relationship with the stored energy or remaining capacity in the energy storage device, effectively slowing down the violent fluctuation of the bus voltage and avoiding the charging of the energy storage device Elevator energy-saving devices with shortcomings such as discharge current impact have become a technical issue to be solved to realize elevator energy-saving by using energy storage devices

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