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Hybrid accumulator for elevator and control method thereof

A hybrid energy storage and charging control technology, which is applied in the direction of circuit devices, battery circuit devices, motor generator control, etc., can solve the problems of prolonging the discharge time of emergency power supply, and not providing the combination scheme of energy storage devices and energy management methods, etc. Achieve the effects of reducing the number of charge and discharge small cycles, optimizing the charge and discharge process, and good technical performance

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

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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

[0051] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0052] 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 grid is rectified by the rectifier 200, the output terminal is connected 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.

[0053]The hybrid energy storage device for elevators of the present invention includes a supercapacitor bank 10, a battery pack 20, a supercapacitor charging...

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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, circuitfor controlling charging and discharging super capacitor, circuit for controlling charging accumulator, and circuit for controlling discharging accumulator. Through super capacitor charging and discharging circuit, DC bus is connected to super capacitor bank; and through charging circuit for accumulator, the super capacitor bank is connected to the accumulator set. Thus, energy flows to the accumulator set from the super capacitor bank. Through discharging circuit for accumulator, accumulator set is connected to DC bus; and energy flows to DC bus from the accumulator set. The invention realizes uninterrupted power supply and power buffering. Features are: minimizing installed capacity of super capacitor bank and accumulator set, optimizing working state, and prolonging service life.

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 elevators and a control method thereof. Background technique [0002] In the drive system of the elevator, the inverter drive mode is generally used. The power grid is directly rectified and connected to the DC bus to form a DC power supply system, and the frequency converter is controlled to work in a variable voltage and frequency conversion mode to output three-phase AC power to drive the elevator motor. In this power supply system, due to the strong nonlinearity of the motor, large power will be drawn from the DC bus during startup and acceleration, resulting in a decrease in bus voltage; In this state, power is fed to the DC bus, causing the bus voltage to rise. If the DC bus voltage fluctuates too much, it will affect the working performance of the frequency converter and elevator auxiliary equipment. Theref...

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 齐智平唐西胜冯之钺韦统振王司博
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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