Abstract : This paper mainly introduces the application of PLC in domestic high-voltage high-power frequency converters, and realizes PID closed-loop control of high-voltage high-power frequency converters through the special function modules of PLC.
Keywords : High-voltage frequency converter functional modules
Abstract : This paper introduces the application of PLC in High Voltage Inverter, and get to the PID control in High Voltage Inverter through the special function block of PLC．
Key words : High voltage inverter Funcdon module
1 Introduction
In the design of domestically produced high-voltage frequency converters, a PLC is typically integrated to improve the flexibility of internal control and the scalability for field applications. Since the invention of the first PLC in the 1970s, its applications have become increasingly widespread and its functions increasingly sophisticated. Besides powerful logic control, PLCs also offer extended functions such as A/D and D/A conversion, PID closed-loop control, high-speed counting, communication networking, interrupt control, and special function calculations. Furthermore, they can be displayed, alarmed, recorded, and interact with via a host computer, significantly enhancing their control capabilities. This paper takes the ZINVERT-H800/B10 domestically produced high-voltage frequency converter designed and manufactured by Guangzhou Zhiguang Motor Co., Ltd. for the wastewater treatment plant of Panzhihua Iron and Steel Group Chengdu Iron and Steel Co., Ltd. as an example to introduce the application of Mitsubishi PLCs in the high-voltage frequency converter control system.
2. Introduction to Guangzhou Zhiguang Motor High Voltage Frequency Converter
Guangzhou Zhiguang Motor Co., Ltd.'s new generation of high-performance zINVERT series intelligent high-voltage variable frequency speed control system is a direct high-to-high voltage variable frequency speed control system. It achieves energy saving by directly adjusting the frequency and voltage of the power supply connected to the stator winding of the high-voltage motor, thereby regulating the motor speed. It is a high-tech product integrating high-power power electronic control technology, microelectronics technology, high-speed fiber optic communication technology, automation control technology, and high-voltage technology. This product adopts a mainstream high-performance dedicated dual-DSP control system and large-scale integrated circuit design, achieving flexible adjustment and energy consumption control of the high-voltage motor through precise digital phase-shifting technology and waveform control technology.
For details, please click: Application of PLC in Domestic High-Voltage High-Power Frequency Converters
