Tension control real tension device two. The 3.3 torque compensation standard (1) static friction torque compensation Because the static friction torque only exists in the activation of all of a sudden, in the system after activation was gone. Therefore, the static friction torque compensation is based on accounting the motor output torque multiplied by a certain percentage of compensation. (2) the sliding friction torque compensation Sliding friction torque compensation of all processes in the system operation are work. The additional torque compensation size in coiling motor to regulate. A relationship between size and operation compensation amount of speed. So in the process of disposal, to compensate the piecewise. (4) the acceleration and deceleration, parking torque compensation An additional torque compensation hard roll motor as standard, compensation coefficient corresponding should be relatively stable, little change. Formula 3.4 accounting accounting center (1) the known air core coil diameter Dmin=200mm, Dmax=1200mm; Vmax=90m/min maximum line speed, tension setting the maximum value of Fmax=50kg (the equivalent of about 500 Newton); reduction ratio i=9; speed limit as follows: because: V= PI *D*n/i (on the rolling motor) = > rolling motor coil diameter of speed in the core is empty the fastest. So: 90=3.14*0.2*n/9=>n=1290r/min; (2) since we know the frequency converter operation in low frequency characteristic of asynchronous motor, communication is not good, the activation of torque at low and nonlinear. So try to avoid coiling motor operation below 2HZ in all the process of winding in. Therefore: winding motor has a minimum speed limit. Accounting is as follows: a quadrupole motor its synchronous speed: n1=60f1/p=>n1=1500r/min. =>2HZ/5HZ=N/1500=>n=60r/min. When reaching the maximum roll diameter, can be found in the process of operation rolling all the low speed. V= - *D*n/i=>Vmin=3.14*1. 2*60/9=25.12m/min. Tension control, to restrictions on speed, otherwise there will be flying. Therefore the speed limit. (3) the tension and torque calculation is as follows: suppose F*D/2=T/I=>F=2*T*i/D about 22KW communication motor, the additional torque calculation is as follows: T=9550*P/n=>T=140N. M. So Fmax=2*140*9/0.6=4200N. (where P is the extra power, n for extra speed). (4) the debugging process: - first to the motor tuning, the motor stator inductance, stator resistance and other parameters read converter. - the encoder signal is connected to the transducer, and in the frequency converter set encoder line number. Then the panel for a given frequency and Start and stop control, whether the operation frequency survey show that fluctuations in the frequency set at the mercy of. Due to the use of dead loop vector control, operation frequency is always in the reference encoder response speed, maximum close to set the frequency, so the operating frequency is in the vicinity of the shock frequency setting. In the process of setting the air core coil diameter value and maximum diameter. Through the front end of the motor coil diameter calculation formula of the maximum amount of encoder pulse plus seizures (P2) and the lowest pulse (P2). The maximum pulse amount calculated on the rolling speed of the motor is limited, because the frequency is used as the tension control, not the speed limit assumption, once broken yarn, winding motor will speed. The lowest pulse impulse is to avoid coiling frequency converter operation under 2Hz, because the frequency is below 2Hz when in operation, the motor torque characteristic is very poor, can appear the fibrillation representation. The dynamic process of all rolling - through the front analysis, in various stages of different roll diameter and different operation speed, torque compensation for certain. The compensation size, able to set as a percentage of the additional torque motor. Five. Tension control of reality. The 5.1 tension control definition Tension control of the so-called popular point is to be able to speak much output control motor power, namely, output the number of Newton. Response to the output shaft of a motor which can control the motor torque. 5.2 real tension control is not the same as on before and after the two power point speed difference to form the tension system, the essence by the speed difference conditioning tension is the PID control to the tension, to add tension sensor. And roll conditioning initiate, continuous, acceleration and deceleration, parking is impossible as the tension control is the effect on the size, tension is not very stable. Will definitely affect the production of products quality. Six. Frequency winding need to converter function (1) the nature of conversion rolling is to end tension control, can control the motor working current, because the output of three-phase asynchronous motor torque T=Cm phi mIa, and proportional to the current. When the load is change to ensure mechanical characteristic curve of motor is relatively hard. So we must use the vector frequency converter, but also need to add the encoder dead cycle control. (2) the market can tension control frequency winding converter mainly has: Yaskawa, Emerson, health etc.. The Emerson TD3300 is a reeling special inverter, inverter of delta V+ series is launched his reeling special inverter, many of the major function and parameter summary reeling dedicated inverter and added their own algorithm, has its own characteristics, plus the delta to solution in the warranty service. 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