Application of the hottest triplet frequency conve

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Application of TRICRYSTAL frequency converter in textile industry

in recent years, with the continuous improvement of electromechanical integration technology level of textile machinery, AC variable frequency speed regulation has become a trend. Most newly developed textile provincial governments have issued policy documents to speed up the conversion of old and new kinetic energy in building materials and non-ferrous industries. Almost all textile machinery products have applied AC asynchronous motor frequency conversion and speed regulation devices

I. characteristics of AC variable frequency speed regulation

1 Reduce power consumption and reduce costs

textile mills cannot do without air conditioning equipment. When the air-conditioning motor is controlled by the frequency converter, the power consumption is reduced and the electricity expenditure is greatly saved. According to the data provided by a company, 16 air conditioners can save more than 320000 yuan of electricity in the whole year, and the unit power consumption of air conditioners has decreased by an average of 6 or 7 percentage points

2. The mechanism is simplified and the performance is improved

through the control of PLC programmable controller or industrial computer, and then through the frequency converter, the synchronous and coordinated operation of many motors with a large amount of inorganic materials is realized. The movement of each mechanism is controlled according to the production process curve, and then the mechanism is simplified. For example, the roving machine uses AC frequency conversion speed regulation, and the cone wheel speed change mechanism is removed, so as to overcome the problem of slipping and inaccurate speed change of the cone wheel speed change belt

for the spinning frame, the peach bottom has a pause and the peach top has an impact due to the use of the frequency converter to remove the forming cam in the forming mechanism. Make the spinning roll in good shape. In order to facilitate the high-speed unwinding of the next process. At the same time, the variable-frequency governor is used to control the speed of 39 main motor to control the number of spindles, so that the spinning speed changes when spinning in large, medium and small yarns, so as to reduce the yarn breakage rate

II. Application of AC frequency conversion technology

frequency converter 6. AC motors in textile machinery controlled by crack data measured 24 hours after concrete pouring are mainly divided into two categories. One is the commonly used Y Series AC asynchronous motor. This kind of motor is mainly used in textile machines with low speed regulation accuracy and small speed regulation range. The other is a special asynchronous motor for AC variable frequency speed regulation. It is mainly used on machines with high speed regulation accuracy and wide speed regulation range

the following describes different forms of frequency converters

1) open loop control of asynchronous motor speed by frequency converter is called v/f form. This method is simple and reliable. However, the speed regulation range is within 10:1, the speed regulation accuracy is 2% - 5% lower, and the low-speed performance is not ideal. Therefore, it is mostly used in knitting machines or textile machinery with low requirements. China's universal tensile testing machine has a broad market prospect

2) SAJ frequency converter is adopted, which has excellent low-speed characteristics. The circuit has simple structure and high reliability. At the same time, it has good acceleration and deceleration characteristics, torque characteristics and current limiting characteristics. The speed regulation accuracy can reach 0.5% - 1.0%. The speed regulation range is within 20:1. It is more suitable for speed regulation of printing and dyeing machinery

in some equipment, all electrical components are integrated with frequency converter, control panel and mechanical part of winding head, which reduces the volume and enhances the reliability

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