Application of Hpmont HD50 high-performance vector control driver in coating machines

1 Introduction

With the development of processed paper production technology and the update of coated processed paper equipment, it is important to detect and control the paper tension running between various production equipment during the coating production process to improve product quality and output. technical measures.

The coating machine is a device that applies a layer of selected coating (viscose, ink, etc.) to raw materials (paper, cloth, plastic, etc.), dries it, and then winds it up. The whole process is divided into several processes: unwinding, intermediate multi-level synchronous control and winding. It is required that the paper tension is constant during the working process, that is, the linear speed is constant.

Technical requirements for coating machines

1. The raw material must maintain constant tension when unwinding and rewinding

2． No matter how the roll diameter changes during unwinding and rewinding, a stable and consistent linear speed must be maintained

3． Unwinding control, intermediate multi-level synchronous control, and winding control speed must be synchronized to avoid being too loose or too tight, or even breaking the raw material.

2 Introduction to HD50 high-performance vector control driver

The HD50 series adopts modular and customized design, has excellent open-loop vector and closed-loop vector control performance, and can control three-phase AC asynchronous motors and three-phase AC synchronous motors.

The HD50 series has built-in extended function interfaces and a variety of encoder interfaces, which can realize speed control, torque control, constant tension control, servo positioning control, and meet various complex and high-end requirements in many fields such as hoisting machinery, printing machinery, and high-end machine tools. To meet the requirements of precision transmission, we provide complete solutions for equipment manufacturing customers.

3 Features of HD50 high-performance vector control driver

HD50 high-performance vector control driver

1. Unique tension control function, multiple tension control options, built-in automatic roll diameter calculation module, advanced inertia calculation module, flexible adjustment of tension taper, and automatic detection function of material breakage.

2. Multiple torque setting modes, torque control and speed control can be flexibly adjusted.

3. Higher performance VC control method, speed control accuracy: ±0.05%, speed control range: 1:1000, torque control response: < 50ms

Starting torque: 180% rated torque/0Hz.

4． Excellent current and voltage control algorithms and advanced over-current suppression can achieve no-current and no-trip operation under any acceleration and deceleration time and any impact load conditions.

5. It can drive synchronous and asynchronous motors, and drive switching between synchronous and asynchronous motors can be achieved through parameter settings.

6. It has simple servo function, servo positioning mode and spindle orientation mode.

7. The product voltage level is higher, including 500-690v voltage output products.

8. Provide a variety of encoder cards, suitable for various encoders, with frequency division output.

4 Application of HD50 high-performance vector control driver in coating machine

Option 1 Torque control mode: As the force required for the roll diameter varies, the inertia calculation module automatically adjusts to keep the linear speed constant.

Option 2 Rolling diameter calculation mode: Based on the rolling diameter, material thickness and other parameters, the built-in rolling diameter automatic calculation module is adjusted to keep the linear speed constant.

Option 3 PID feedback mode: Adjust the speed difference through pulse PID feedback to keep the linear speed constant.

This case adopts Scheme 3, and the application site is a factory in Guangming New District, Shenzhen. The debugging process and effects of the winding inverter are as follows:

4.1 Debugging process

(1) Wiring according to Figure 1;

(2) Set the motor parameters according to the motor nameplate;

(3) Disconnect the motor load, use the jog (JOG) function to determine the direction of motor rotation, and change the wiring to forward rotation;

(4) Carry out self-tuning of motor parameters;

(5) Set the maximum output frequency and upper limit frequency;

(6) Set the command to give the channel and the frequency to the channel;

(7) Set acceleration and deceleration time;

(8) Set terminal function;

4.2 Control signal wiring

The control signal wiring is shown in Figure 1, where AI1 is the frequency given, DI1 is forward, DI3 is reverse, and DI6 is the pulse PID feedback input.

4.3 Final parameter settings

4.4 Actual effect

According to field tests, when the winding reaches about 600m, the change in winding diameter is small, the amount of PID pulse feedback is small, the winding is stable, and the coating is uniform. The roll diameter changes greatly from 600m to 1200m. Through PID pulse feedback, the rotation speed is adjusted in time to keep the linear speed constant, and a good coating effect is obtained. The work efficiency has been improved by more than 20% compared with the original traditional method, the operation method has reduced the dependence on the operator's skills, the degree of automation has been greatly improved, and it has been highly praised by users.

4.5 Debugging Precautions

1. It is necessary to obtain the motor parameters accurately, so the motor nameplate values must be correctly entered and the motor parameters must be self-tuned.

2. If large low-frequency starting torque is required, just set F09.07 to 0 (automatic torque boost) to meet the requirements.

5 Conclusion

HD50 high-performance vector control driver has been successfully used in the field of packaging machinery for its superior performance (large low-frequency torque, wide speed range, high steady-state accuracy, flexible and convenient operation, full functional protection) and diversified control The scheme and high reliability have been fully verified and fully meet the coating machine process control requirements.

With the development of processed paper production technology and the update of coated processed paper equipment, it is important to detect and control the paper tension running between various production equipment during the coating production process to improve product quality and output. technical measures. The coating machine is a device that applies a layer of selected coating (viscose, ink, etc.) to raw materials (paper, cloth, plastic, etc.), dries it, and then winds it up. The whole process is divided into several processes: unwinding, intermediate multi-level synchronous control and winding. It is required that the paper tension is constant during the working process, that is, the linear speed is constant.