subject: Inverter In Printing Equipment And More Motor Synchronous Application [print this page] China is the world's largest textile and apparel producer. 2000 China's total textile fiber processing reached 12.1 million tons, spinning, weaving and garment production are among the first in the world. In 2003, the textile and garment export more than 80 billion U.S. dollars, accounting for China's total export volume of 20%. In 2003 China's textile machinery imports and domestic production of both more than 4 billion U.S. dollars. However, due to the constraints of the textile dyeing technology, at present the production of fabrics can not meet the requirements of garment exports, imports have caused material each year 50 billion dollars. Therefore, printing and dyeing industry to improve the technical level, there is still tremendous room for growth. The traditional textile industry is labor-intensive industries, low level of automation equipment. Transmission is not used in the majority of speed, need speed most occasions to use DC motor, such as the warping machine, sizing machine, and many printing equipment. AC variable speed with very little, mainly AC voltage regulation speed torque motor, motor speed slip, cascade control thyristor, thyristor AC - DC - AC variable frequency and so on. Printing and dyeing equipment with torque motor soft mechanical properties, to ensure consistency throughout the machine speed cloth under a moderate tension; textile mill spinning speed is achieved using lap torque motor regulator of self-leveling; thyristor controlled electromagnetic governor motor (also known as electrical and electromagnetic slip clutch slip) for the carding machine speed; thyristor cascade control is mainly used in the textile mills of the ventilator, to save energy; thyristor AC - DC - AC variable speed control, used in chemical fiber industry, filament spinning machine.
Converter application in the textile industry overview
Textile industry is the earlier AC Motor Frequency Converter promote the use of an area. In the early 70s filament spinning machine has been widely adopted by many thyristor static inverter synchronous motor drive unit to address the high-speed and multi-motor synchronization. Into the 80's, because of the maturity of AC and the advent of new high performance frequency converter, the textile industry by AC motor speed regulation technology in full swing. This is because the textile, printing and dyeing, chemical fiber equipment and more as a one-way, irreversible operation constant torque load, a single power of tens of kW in the following, in particular, under suitable technical level at Universal AC frequency converter popularization and application. China's textile industry equipment, ten years after the introduction of technology, digestion and absorption, and self-development joint venture set up factories, has made considerable progress, equipment, electromechanical integration level, automation has been greatly improved. Not only device manufacturers, and more textile companies realize the advantages of mechanical and electrical integration of textile machinery. During the Eighth Five-Year, mainly in printing and dyeing equipment to promote the application of frequency conversion technology and PLC technology be applied to the entire Ninth Five-Year period the textile industry. Frequency can now say that technology has been popular in the textile industry.
All kinds of textile machinery of its main drive is almost without exception, the application of an AC motor speed regulation technology, including single frequency control system and multi-unit machine synchronous variable speed system. Types of stresses from the transducer, including high-performance general-purpose inverter to the servo controller everything.
(1) Universal V / F controlled induction motor drive inverter. Since the early 90's printing and dyeing industry in China to promote the application of typical example is the pre-printing processing equipment such as desizing, scouring and bleaching machines, cloth folder mercerized machine, straight roller mercerizing, soaping machine; finishing equipment such as hot air tenter , heat setting machine; flat screen Printing machine Scraping Indian unit, from the transformation of DC drive AC drive, AC inverter multi-motor synchronous technology. Characterized by the use of high power bipolar transistor inverter technology, the open-loop speed control is simple, high reliability, easy to use; static speed accuracy lower, typically 2% to 5%; speed limited in scope, generally (10 ~ 20): 1; power is not high, tens of kW in the following; starting torque is not to replace the DC motor when the general power to enlarge 1.
(2) fan or pump special frequency converter induction motor speed regulation. And GM V / F Control Frequency synchronization in China's textile industry to promote the application of a typical application example is the textile and dyeing factory air conditioning ventilation of hot air. Characterized by low prices, saving significant small speed range.
(3) Speed Sensorless Induction Motor Vector Control. Late 90s to replace the ordinary V / F control frequency converter, into the mainstream of inverter widely applied in the textile industry. Its characteristics are the main inverter using IGBT as the switching elements to control a simple, reliable, relatively easy to use; can reach the speed high accuracy, the static speed accuracy is up to (0.5 ~ 1)%; speed range up to (20 ~ 50): 1; dynamic performance is better, higher starting torque; If you use the frequency-specific motor, replace the DC motor, the power level without amplification.
Inverter In Printing Equipment And More Motor Synchronous Application
