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Hybrid accumulator for elevator and control method thereof

A hybrid energy storage, charge-discharge control technology, applied in circuit devices, battery circuit devices, motor-generator control, etc., can solve the problems of prolonging the discharge time of emergency power sources, not providing a combination scheme of energy storage devices and energy management methods, etc. , to achieve the effect of optimizing the charging and discharging process, good technical performance and reducing system cost

Inactive Publication Date: 2010-02-03
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the elevator emergency power supply device disclosed in U.S. Patent US6938733B2, in order to prolong the discharge time of the emergency power supply, the patent proposes a design method using a combination of a rechargeable battery and a supercapacitor, but does not provide a specific combination of the two energy storage devices and energy management method

Method used

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  • Hybrid accumulator for elevator and control method thereof
  • Hybrid accumulator for elevator and control method thereof
  • Hybrid accumulator for elevator and control method thereof

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0048] Such as figure 1 As shown, the elevator device of the present invention includes a rectifier 200 , a DC bus 11 , a bus filter capacitor 300 , a discharge circuit 100 , a frequency converter 901 , a motor and its load 902 . Wherein, the bleed circuit 100 is connected in parallel with the DC bus 11 , and includes a bleed resistor 101 and a bleed control switch 102 . The three-phase AC power of the power grid is rectified by the rectifier 200, and the output is supplied to the DC bus 11. The bus filter capacitor 300 filters the DC bus 11. The input terminal of the frequency converter 901 is connected to the DC bus 11, and the output three-phase AC drives the motor and its load 902 .

[0049] The hybrid energy storage device for elevators of the present invention includes a supercapacitor bank 10, a battery pack 20, a supercapacitor chargi...

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Abstract

The mixed energy storage device for elevator includes super capacitor bank, accumulator set, super capacitor charging and discharging circuit, charging and discharging circuit for accumulator. Throughsuper capacitor charging and discharging circuit, super capacitor bank is connected to DC bus in power supply system for elevator. Through charging and discharging circuit for accumulator, accumulator set is connected to DC bus. Using circuits for controlling charging and discharging super capacitor and accumulator, the invention realizes uninterrupted power supply and power buffering. Features are: minimizing installed capacity of super capacitor bank and accumulator set, optimizing working state of charging and discharging accumulator set, reducing number of charging and discharging cycle and prolonging service life etc. In the mixed energy storage device, accumulator set exchanges energy with DC bus only through one stage of DC / DC so as to raise efficiency of storing energy greatly.

Description

technical field [0001] The invention relates to a hybrid energy storage device and a control method thereof, in particular to a hybrid energy storage device for an elevator and a control method thereof. Background technique [0002] In the drive system of the elevator, the electric energy of the grid is generally directly rectified and confluent to the DC bus to form a DC power supply system, which is then inverted by a frequency converter to generate a three-phase alternating current with variable voltage and frequency to drive the motor. Since the motor will absorb a large amount of power from the DC bus when it starts or accelerates, the terminal voltage of the DC bus will decrease; and when it stops or decelerates, it will feed back power to the DC bus because the motor is in the power generation state, resulting in a rise in the bus voltage. high. If the DC bus voltage fluctuates too much, it will affect the working performance of the frequency converter and elevator a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02J7/32H02J7/34H02J15/00H02P3/18
Inventor 冯之钺齐智平唐西胜韦统振王司博
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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