First, the characteristics of AC frequency control 1. Reduce the power consumption to reduce costs Textile factory can not do without air conditioning equipment. When the air-conditioner motor is controlled by an (intelligent) variable frequency speed controller, the power consumption is reduced, and power consumption is greatly saved. According to the data provided by a company, 12 air conditioners can save more than 24 million yuan in the year, and the average power consumption of air conditioners has dropped by an average of 6.7 percentage points.
2. It simplifies the mechanism to improve the performance through the control of Taiwan Yonghong PLC PLC programmable controller or industrial control computer, and then realizes the synchronous and coordinated operation of multiple motors through the easy energy frequency conversion governor. Controlling the motion of each mechanism according to the production process curve simplifies the mechanism. For example, the roving machine uses AC variable frequency speed control to remove the cone-wheel transmission mechanism, thereby overcoming the problem that the conical wheel transmission belt is slippery and inaccurate.
For the spinning frame, the use of an energy-efficient frequency conversion governor removed the forming cams in the forming mechanism, thereby overcoming the phenomenon of a pause in the peach bottom caused by the forming cams and an impact on the peach top. Makes the fine roll shape good. In order to facilitate the next process of high-speed unwinding. At the same time, the frequency conversion speed governor is used to control the speed change of the thirty-nine main motor to control the number of revolutions of the spindle, so that the rotation speed of the spun yarn changes in the medium, small, and medium yarns so as to reduce the yarn breakage rate.
Second, the application of AC frequency conversion technology The motor of the textile machinery controlled by the inverter of YiNeng is mainly the three-phase induction AC asynchronous motor.
The following describes the different forms of energy inverter.
(1) The open-loop control of asynchronous motor speed with the inverter is called V/F form. In this way, the circuit is simple and reliable, but the speed accuracy is low, and the low speed performance is not ideal. Therefore, it is mostly used in knitting machines or textile machines that require less.
(2) The speed sensorless vector control inverter is used, such as the use of the EDS1000 series inverter of the company. It has excellent low speed characteristics. The circuit structure is simple and highly reliable. At the same time also has a good acceleration and deceleration characteristics, torque characteristics and current limiting characteristics. Speed ​​accuracy up to 0.1%. The speed range is within 100:1. More suitable
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