Research on Control Speed ​​of Transformer Open Loop

Under the control of the open loop speed of the inverter, the influence of the motor parameters and the change of the external load is not taken into account, so the displayed speed is not accurate. The solution is to use the speed feedback, that is, the speed limit in the speed regulation. The speed feedback card (PG card) is an optional accessory for the frequency converter. The O-line of the photoelectric encoder is rotated in the forward direction to output the pulse line x-line, and the output pulse line Y-line is reverse-rotated, and respectively connected to the terminal of the PG card.

Set the inverter to enter the speed feedback operation state, input the number of encoder speed pulses to the inverter, and then enter the motor self-tuning state, the inverter automatically measures the motor related parameters. Then, the setting of only the I parameter value in the feedback control is performed, and the parameter value directly affects the speed and stability of the motor speed response. After multiple input of different parameter values, the final parameter value is determined according to the reflected motor speed value. The goal is that the motor speed error is lower than the speed of the actual speed output when the motor speed error is lower than the actual speed output value. The speed is not allowed to overshoot.

Since the flying hammer has a return error for the mechanical device, the axial displacement is different when the acceleration and deceleration enter the same speed point, which is very important for the design of the test bench. Inappropriate parameter selection during setting will cause the motor to violently shake the speed, which will cause the flying hammer to generate a large torsional moment, which may cause damage to the connecting parts and even the overturning of the table. The technical indicators achieved by the system have the function of automatically collecting the speed and the flyweight stroke, the speed error soil 1r/mjn, the stroke error. The drawing coordinates are automatically changed with the range of the speed measurement, and multiple curves can be compared to support the printing function.

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