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Elevator control method and control device based on three-level power converter

A power converter and elevator control technology, applied in the field of elevator control, can solve the problems of reducing passenger comfort and convenience, and achieve the effect of avoiding embarrassment and inconvenience and avoiding emergency stop

Active Publication Date: 2018-08-14
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this treatment ensures the safety of the passengers, it will obviously greatly reduce the comfort and convenience of the passengers

Method used

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  • Elevator control method and control device based on three-level power converter
  • Elevator control method and control device based on three-level power converter
  • Elevator control method and control device based on three-level power converter

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Embodiment Construction

[0049] See figure 1 In this embodiment, the external power supply 1 is connected to the three-phase AC side of the rectifier 2, the DC side of the rectifier 2 is connected to the DC side input end of the inverter 7 via the DC bus 6, and the smoothing DC capacitor 3 and the energy consumption circuit 5 are connected across the two ends of the DC bus 6, the bus voltage detection device 4 is set at both ends of the smooth DC capacitor 3. The three-phase AC side of the inverter 7 is connected to the elevator motor 9 via the current detection device 8, and the elevator motor 9 The specific structure is connected to the traction sheave 10, and the car 13 and the counterweight 12 are suspended on both sides of the traction sheave 10 and the guide wheel 11 by ropes. The energy consumption controller 17 controls the switching elements of the energy consumption circuit 5 to turn on and off according to the DC bus voltage detected by the bus voltage detection device 4. The energy consump...

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PUM

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Abstract

The invention discloses an elevator control method based on a three-level electric power converter. According to the elevator control method based on the three-level electric power converter, a fault-tolerant control mode is adopted for modulating the three-level electric power converter when an open circuit fault happens to a power module of the three-level electric power converter constituting an elevator driving system, and an elevator control mode is properly modified at the same time so that emergency stop of an elevator can be avoided, and the elevator can stop on a target storey and stops operating when a door is opened and passengers come out of the elevator. The invention further provides a control device for achieving the elevator control method.

Description

Technical field [0001] The invention relates to an elevator control method, in particular to an elevator control method based on a three-level power converter. The invention also relates to an elevator control device based on a three-level power converter. Background technique [0002] Compared with the traditional two-level converter, the three-level power converter has the advantages of low voltage stress of power devices, low voltage change rate dv / dt, good output waveform harmonic characteristics, low switching frequency and high efficiency. It is especially suitable for Applications including elevator drive systems. However, during operation, the power switch constituting the three-level power converter may have an open circuit failure due to thermal cycling, collector overcurrent, or gate drive failure, which may cause the entire device to malfunction. The structure of the three-level power converter determines that the fault-tolerant control of the three-level power conv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B1/06B66B5/02
Inventor 陈玉东朱武标薛弛严海波刘玉兵
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD