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Energy saving device for elevator

A technology of energy-saving devices and energy storage devices, applied in circuits, electrical components, secondary batteries, etc., can solve problems such as adverse effects on motor speed regulation performance, achieve the effect of improving control performance and slowing down violent fluctuations

Active Publication Date: 2012-02-01
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the above analysis, it is not difficult to find that no matter whether the elevator motor is in a motoring state or a regenerative state, if the reference value of the bus voltage is constant, the actual bus voltage will change rapidly, which will obviously have an adverse effect on the speed regulation performance of the motor

Method used

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Experimental program
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Embodiment Construction

[0028] In the following description, it is stipulated that: the charging and discharging current flows from the energy storage device to the busbar is positive, and vice versa is negative, and the power required for the elevator motor to absorb electric energy to do work is positive, and vice versa is negative.

[0029] see figure 1 , in this embodiment, the external power supply 1 is connected to the three-phase AC side of the rectifier 2, and the 2-phase DC side of the rectifier 2 is connected to the 2-phase DC side of the inverter 7 via the DC bus 6, and the smoothing DC capacitor 3 and energy consumption The circuit 5 is respectively connected across the two ends of the DC bus 6, the bus voltage detection device 4 is arranged at both ends of the smoothing DC capacitor 3, the 3-phase AC side of the inverter 7 is connected to the elevator motor 9 through the current detection device 8, and the elevator motor 9 is connected with the traction sheave 10 through a specific struc...

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Abstract

The invention discloses an energy saving device for an elevator, which comprises an energy storing device (20), an energy storing device state detector (21), a charging and discharging circuit (19) and an energy storing device controller (22), wherein the energy storing device controller (22) controls the charging and discharging circuit (19) in an allowable range of the energy storing device (20) and the charging and discharging circuit (19) according to the bus voltage and the reference value of the bus voltage, and in addition, the reference value of the bus voltage is variable according to the charging state and / or the charging state change of the energy storing device (20). The energy saving device for the elevator has the advantages that the energy saving of the elevator can be realized, and simultaneously, the severe fluctuation of the bus voltage can be effectively retarded, so the control performance of a motor of the elevator is improved.

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, through appropriate control, the energy storage device added to the main circuit of the elevator drive can 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 motor. This has become a research hotspot in the elevator industry to solve the problem of processing the regenerative energy generated during the operation of the elevator motor and at the same time realize the energy-saving effect of the elevator. Such as Chinese Invention Patent Application Publications CN 101381046A, CN 1845417A, CN1946625A, Chinese Invention Patent Specifications CN 100593504C, CN 100450907C, CN1229275C and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B5/00B66B1/34H01M10/46
CPCY02E60/12Y02E60/10
Inventor 陈玉东
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD
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