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STM32F4-based thyristor rectifier control system

A technology of control system and rectifier device, which is applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components, etc. problems, to facilitate the modification of parameters, reduce requirements, and achieve the effect of strong human-computer interaction

Inactive Publication Date: 2017-05-31
南京恒誉名翔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional analog trigger circuit has complex control circuits, is difficult to debug, has low reliability, and the accuracy of the trigger signal is not high, which is quite different from the expected waveform.

Method used

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  • STM32F4-based thyristor rectifier control system
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  • STM32F4-based thyristor rectifier control system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] As shown in the figure, the thyristor rectifier control system based on STM32F4 is composed of STM32F429 microcontroller, touch screen, drive circuit, three-phase fully-controlled rectifier bridge, three-phase AC power supply, transformer, filter circuit, current detection, voltage detection, and load. The three-phase AC power supply is connected to the transformer, the transformer is connected to the three-phase fully-controlled rectifier bridge, the three-phase fully-controlled rectifier bridge is connected to the filter circuit, current detection, and the filter circuit is connected to the voltage detection and load; the current detection and voltage detection are connected to STM32F429 Microcontroller; the touch screen is connected to the STM32F429 microcontroller, the STM32F429 microcontroller is connected to a drive circuit, and the drive circuit is connected to a three-phase fully-controlled rectifier bridge; the STM32F429 microcontroller is provided with a D / A con...

Embodiment 2

[0021] Further, the transformer is a step-down transformer.

Embodiment 3

[0023] Further, the filter circuit adopts an L-shaped filter circuit to obtain the current waveform. L-type filter circuit such as figure 2 shown, the value of capacitor C is usually estimated based on the load, so that RC ≥(1.5~5.5)T, T is the ripple period of the power supply voltage, from the output DC voltage of 300V and the output power of 3kW, the load can be obtained R = U 2 / P =30Ω, so we can get C ≥611μF, take C =1100μF.

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Abstract

The invention discloses an STM32F4-based thyristor rectifier control system, comprising an STM32F429 microcontroller, a touch screen, a drive circuit, a three-phase full control rectifying bridge, a three-phase alternating current power, a transformer, a filtering circuit, a current detector, a voltage detector, and a load; the three-phase alternating current power is connected with the transformer, and the transformer is connected with the three-phase full control rectifying bridge; the three-phase full control rectifying bridge is connected with the filtering circuit and the current detector; the filtering circuit is connected with the voltage detector and the load; the current detector and the voltage detector are connected to the STM32F429 microcontroller; the touch screen is connected with the STM32F429 microcontroller, and the STM32F429 microcontroller is connected with the driving circuit; the driving circuit is connected with the three-phase full control rectifying bridge; a D / A converter, an A / D converter, and an I / O interface are arranged on the STM32F429 microcontroller. By taking the STM32F429 microcontroller as the core and taking an integrated digital shift phase triggering circuit, a sampling circuit and others as assistance, the control system of the thyristor rectifier is designed, and is simple in structure, and easy to debug and maintain.

Description

technical field [0001] The invention relates to a rectifier control system, in particular to a thyristor rectifier control system based on STM32F4. Background technique [0002] With the development of power electronic technology, thyristor phase-controlled rectification technology is more and more widely used in high-power occasions such as metallurgy, electric power, and chemical industry. , and its reliability, has an important position in large-capacity applications. In view of the complexity and diversity of the controlled objects of the rectifier, the requirements for the accuracy and stability of the rectifier are getting higher and higher. The traditional analog trigger control is difficult to meet the increasingly complex control requirements, and is gradually replaced by digital controllers that can realize complex control algorithms. [0003] High-power thyristor rectifier device, its output power can reach several megawatts, and the current can reach thousands ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/162
CPCH02M7/162
Inventor 李冰李相武王瑛费浚纯吴佳男
Owner 南京恒誉名翔科技有限公司
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