Alternating current dual-control and high-voltage matrix frequency-conversion electronic control system of hoisting machine

An electric control system and hoist technology, applied in the direction of elevators, transportation and packaging, etc., can solve problems such as insecurity and difficulty in ensuring long-term operation of frequency converters, and achieve the effects of small footprint, easy installation, and simple operation and conversion

Active Publication Date: 2011-06-08
开封市中南电器技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In particular, the synchronous rectification of the three-phase IGBT full-controlled bridge charges the DC link capacitor, and the voltage on the capacitor provides the IGBT to form a single-phase H-shaped bridge inverter circuit, see figure 1 Schematic diagram of the power unit of ordinary high-voltage inverters. Due to the problems of the capacitor itself, it is difficult to ensure the long-term operation of the inverter, especially the stability and reliability under high-voltage and high-power loads need to be subsidized by bypass
Therefore, there are very large unsafe factors in the application of this kind of high-voltage frequency converter in the electric control system of mine hoist

Method used

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  • Alternating current dual-control and high-voltage matrix frequency-conversion electronic control system of hoisting machine
  • Alternating current dual-control and high-voltage matrix frequency-conversion electronic control system of hoisting machine
  • Alternating current dual-control and high-voltage matrix frequency-conversion electronic control system of hoisting machine

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Embodiment 1

[0024] Embodiment one: see Figure 2 to Figure 7 , the mine hoist AC dual-control high-voltage matrix frequency conversion electric control system of the present invention see figure 2 , TGZG-400 high-voltage vacuum switchgear A, it has the protection requirements of the electric control system of the hoist, and meets the dual power supply incoming lines stipulated in the coal mine safety regulations. The switchgear provides the three-phase power supply to the high-voltage matrix inverter B, which is supplied to the matrix power cabinet 1 and the matrix power cabinet 2 through the transformer cabinet. Two sets of PWM control systems are installed in one control cabinet to facilitate dual-control power conversion. See image 3 , the power output is connected to the motor through the switching cabinet. See Figure 4 , the three-phase 6kv or 10kv high-voltage power supply enters the matrix variable frequency transformer cabinet TI through the vacuum switch cabinet. According t...

Embodiment 2

[0025] Embodiment two: see figure 2In this embodiment, the hoist AC dual-control high-voltage matrix frequency conversion electronic control system includes a high-voltage vacuum switch cabinet A, a high-voltage matrix frequency converter cabinet B, and an operating console E. The high-voltage matrix frequency converter cabinet B includes a transformer cabinet, two Power cabinets 1, 2, and a switching cabinet 3 and a control cabinet 4, the high-voltage vacuum switch cabinet A provides three-phase power supply to the power cabinet 1 and the power cabinet 2 through the transformer cabinet, and the control cabinet 4 is installed There are two sets of PWM control systems, which respectively control the connection between power cabinet 1 and power cabinet 2, the control connection between switching cabinet 3 and power cabinet 1 and power cabinet 2, the control connection between console E and switching cabinet 3, and the power output terminals of the two power cabinets The motors ...

Embodiment 3

[0026] Embodiment three: see Figure 2 ~ Figure 4 In this embodiment, the AC dual-control high-voltage matrix frequency conversion electronic control system of the hoist, the high-voltage power supply is connected to the transformer cabinet through the high-voltage vacuum switch cabinet A, and the transformer cabinet is provided with n secondary side coils to output three voltages according to the required voltage requirements. The phase voltage and current are connected to two groups of matrix power units AFR in parallel, and the n matrix power units AFR of each group are respectively connected to their respective control units, and the n matrix power units AFR of each group are connected in series and connected respectively through high-voltage vacuum contact Connectors ZJ1 and ZJ2 are connected to form the row bus output terminals N1 and N2, and then connected to the power control switch HK, and the control unit determines the terminal output U1, V1, W1 of the matrix power u...

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Abstract

The invention relates to an electronic control system of a hoisting machine, in particular to an alternating current dual-control and high-voltage matrix frequency-conversion electronic control system of the hoisting machine. The electronic control system provided by the invention comprises a high-voltage vacuum switch cabinet (A), a high-voltage matrix frequency converter cabinet (B) and an operating station (E), wherein a transformer cabinet, two power cabinets, a switching cabinet and a control cabinet are arranged in the high-voltage vacuum switch cabinet; the high-voltage vacuum switch cabinet supplies a three-phase power supply to the power cabinets through the transformer cabinet; two sets of PWM (Pulse Width Modulation) control systems are installed in the control cabinet and are respectively in control connection with the power cabinets; the switching cabinet is also in control connection with the power cabinets; the operating station (E) is in control connection with the switching cabinet; and the power output ends of the two power cabinets are respectively connected with an electromotor through the switching cabinet. The electronic control system provided by the invention adopts a vacuum contactor to control frequency-conversion switching, forms the switching of a relay control system comprising intermediate relays with excellent performance and provides reliable control equipment to the energy saving and safety of the hoisting machine in coal mines or mines.

Description

technical field [0001] The invention relates to an electric control system for a hoist, in particular to an AC dual-control high-voltage matrix variable-frequency electric control system for a mine hoist. Background technique [0002] At present, the electrical control systems of mine hoists in China and other coal-producing countries in the world mostly use independent control methods, especially in recent years, the development of programs using PLC technology has certain technical difficulties in use and maintenance, resulting in The analysis and handling of system faults are difficult, which will have a certain impact on the normal production and safe production of the mining industry. [0003] With the global demand for energy saving and consumption reduction, frequency conversion technology has been widely used in various industries, especially high-voltage frequency converters have been widely used in mine hoists. The frequency-variable high voltage produced by the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B1/34B66B5/02
Inventor 许登举
Owner 开封市中南电器技术有限公司
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