Motor Control System Design Integrating With Flameproof Mining

Having developed for 20 years, the theory of vector control was born in German in 1986.The modulation, control and power devices had been developed a lot. As the use of coal underground mining face of electrical equipment and control equipment, must be flameproof or intrinsically safe type equipment. In some explosive gas and dust are more places (coal \ coking plant \ part of the chemical) variable frequency speed regulation system has not yet been fully applied, the main reason is that these parts of the frequency control system requires explosion-proof, so Common types of frequency control system is strictly prohibited in the underground application. At present very few meet the requirements of Coal Mine Safety flameproof frequency control system products. Along with the deepening of China's market economy development, and coal output, energy, raise efficiency has been raised to an important position, equipment, energy-saving imperative. At present, production of the explosion-proof inverter installation characteristics because of the difficulty has not been universal. Based on the above, we intend to develop a mine explosion-proof electrical frequency of integration in order to meet the needs of various types of coal production.The text software takes measure of the dual algorithm of constant frequency ratio and speed sensorless vector control ,in the text it describes the control algorithm of U/F, the control algorithm of speed sensorless vector control of SVPWM,flux estimate,rev estimate and other changes about vector control. To Ti's DSP2812 for the kernel it prepared the program..Basing on this, the hardware part of the text analyses the hardware design of 120 KVA mine medium voltage frequency converter, and offer the choice of hardware, analyses the drive circuit, power-on snubber circuit, DC bus voltage detection circuit, Capacitor terminal voltage detection, output current detection, temperature detection and so on, desingns a 6-output switching power supply, and conclude some experience of the hardware design of high-power frequency system. Experimental result showed that the frequency system here is reliable and robust perfectly.