MD330系列变频器用户手册（英文）
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MD330系列变频器用户手册（英文）
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Tension Control Inverter
MD330
User Manual
V0.0Contents
Chapter 1 Overview............................................................................1
Chapter 2 Tension Control Principles...............................................2
2.1 Schematic diagram for typical curling tension control.............2
2.2 Tension control scheme..........................................................3
Chapter 3 Function Parameter Table................................................8
Chapter 4 Parameter Description....................................................21
4.1 Selection of Control Mode....................................................21
4.2 Tension setting.....................................................................24
4.3 Curling radius calculation.....................................................26
4.4 Line speed input...................................................................30
4.5 Tension compensation..........................................................32
4.6 PID parameters....................................................................36
4.7 Auto roll alternation parameter.............................................38
4.8 Additional parameters...........................................................39Chapter 1 Overview
Chapter 1 Overview
This manual shall be used together with the MD320 User Manual.
This manual only describes the parts related to curling tension. Other
basic functions are described in MD320 User Manual.
When the tension control mode is set as inactive, the inverter has the
same functions are the MD320.
MD330 is used for curling control. It can automatically calculate the
curling radius and is able to realize constant tension when the curling
radius changes. To realize constant torque control in the applications
without curling radius change, MD320 inverter is recommended.
When the tension control mode is selected, the output frequency and
torque of the inverter will be automatically generated by the tension
control function, and the frequency source selection in group F0 will be
inactive.
1Chapter 2 Tension Control Principles
Chapter 2 Tension Control Principles
2.1 Schematic diagram for typical curling tension control
F
Carry-over pinch roll
Wind up
Fig.1 without tension feedback
F
Carry-over pinch roll
Float
Wind up
Fig.2 With float roll tension feedback
2Chapter 2 Tension Control Principles
2.2 Tension control scheme
There are two ways for tension control: to control the output
torque of the motor and to control the rotation speed of the motor.
MD330 is designed with two tension control modes for the two
methods.
1. Open-loop torque control mode
Open loop means that there is no tension feedback signal, and the
inverter can realize the control through the output frequency or torque
only, which will not be affected if the inverter is in open loop vector
mode or close loop vector mode. The torque control mode means that
the inverter controls the motor’s torque rather than its frequency, and
the output frequency changes automatically following the speed of the
materials.
According to the formula F=T/R (where: F is the material tension, T
is the torque of the wind-up roll, R is the curling radius), if the torque of
the wind-up roll can be adjusted based on the change of the curling
radius, the tension of the materials can be controlled. This is the
principle for tension control in open loop torque mode. The reason for
its feasibility is that the tension of the material is from the torque of the
wind-up roll only, and the torque of the wind-up roll is mainly imposed
on the materials.
The MD series inverter can correctly control the output torque of
the motor in closed loop vector mode (with speed sensor vector control).
However, to use this control mode, encoder must be installed (the
3Chapter 2 Tension Control Principles
inverter shall be equipped with PG card).
2. Function modules related to open loop torque mode
1) Tension setting part: It is used to the set the tension. In practice,
the set value of the tension shall correspond to the actual situations,
such as the materials used and the curling requirements. The
relevant value shall be set by the user. The tension taper can
control the tension to decrease with the increase of the curling
radius, so as to improve the curling effect.
2) Curling radius calculation part: It is used to calculate or acquire the
curling radius information. If line speed is used to calculate the
curling radius, the line speed input function part is needed. If
thickness accumulation is used to calculate the curling radius, the
relevant function part for calculating curling radius with thickness
accumulation shall be used.
3) Torque compensation part: Part of the output torque of the motor
will be used to overcome the rotation inertia of the
wind-up/roll-down roll during the acceleration/deceleration. The
inertia compensation part of the inverter can be automatically
compensated automatically according to the
acceleration/deceleration rate through proper parameter setting, so
that the system can still have stable tension during the
acceleration/deceleration. The friction compensation can eliminate
the influence of the system resisting force over the tension.
3. Close-loop speed control mode
Close loop means that the tension (position) detection feedback
4Chapter 2 Tension Control Principles
signal forms a close loop for adjustment. Speed control mode means
that the inverter realizes the control by adjusting the output frequency
according to the feedback signal. The inverter under speed mode can
operate in any of the following three modes: speed sensorless vector
MD330
User Manual
V0.0Contents
Chapter 1 Overview............................................................................1
Chapter 2 Tension Control Principles...............................................2
2.1 Schematic diagram for typical curling tension control.............2
2.2 Tension control scheme..........................................................3
Chapter 3 Function Parameter Table................................................8
Chapter 4 Parameter Description....................................................21
4.1 Selection of Control Mode....................................................21
4.2 Tension setting.....................................................................24
4.3 Curling radius calculation.....................................................26
4.4 Line speed input...................................................................30
4.5 Tension compensation..........................................................32
4.6 PID parameters....................................................................36
4.7 Auto roll alternation parameter.............................................38
4.8 Additional parameters...........................................................39Chapter 1 Overview
Chapter 1 Overview
This manual shall be used together with the MD320 User Manual.
This manual only describes the parts related to curling tension. Other
basic functions are described in MD320 User Manual.
When the tension control mode is set as inactive, the inverter has the
same functions are the MD320.
MD330 is used for curling control. It can automatically calculate the
curling radius and is able to realize constant tension when the curling
radius changes. To realize constant torque control in the applications
without curling radius change, MD320 inverter is recommended.
When the tension control mode is selected, the output frequency and
torque of the inverter will be automatically generated by the tension
control function, and the frequency source selection in group F0 will be
inactive.
1Chapter 2 Tension Control Principles
Chapter 2 Tension Control Principles
2.1 Schematic diagram for typical curling tension control
F
Carry-over pinch roll
Wind up
Fig.1 without tension feedback
F
Carry-over pinch roll
Float
Wind up
Fig.2 With float roll tension feedback
2Chapter 2 Tension Control Principles
2.2 Tension control scheme
There are two ways for tension control: to control the output
torque of the motor and to control the rotation speed of the motor.
MD330 is designed with two tension control modes for the two
methods.
1. Open-loop torque control mode
Open loop means that there is no tension feedback signal, and the
inverter can realize the control through the output frequency or torque
only, which will not be affected if the inverter is in open loop vector
mode or close loop vector mode. The torque control mode means that
the inverter controls the motor’s torque rather than its frequency, and
the output frequency changes automatically following the speed of the
materials.
According to the formula F=T/R (where: F is the material tension, T
is the torque of the wind-up roll, R is the curling radius), if the torque of
the wind-up roll can be adjusted based on the change of the curling
radius, the tension of the materials can be controlled. This is the
principle for tension control in open loop torque mode. The reason for
its feasibility is that the tension of the material is from the torque of the
wind-up roll only, and the torque of the wind-up roll is mainly imposed
on the materials.
The MD series inverter can correctly control the output torque of
the motor in closed loop vector mode (with speed sensor vector control).
However, to use this control mode, encoder must be installed (the
3Chapter 2 Tension Control Principles
inverter shall be equipped with PG card).
2. Function modules related to open loop torque mode
1) Tension setting part: It is used to the set the tension. In practice,
the set value of the tension shall correspond to the actual situations,
such as the materials used and the curling requirements. The
relevant value shall be set by the user. The tension taper can
control the tension to decrease with the increase of the curling
radius, so as to improve the curling effect.
2) Curling radius calculation part: It is used to calculate or acquire the
curling radius information. If line speed is used to calculate the
curling radius, the line speed input function part is needed. If
thickness accumulation is used to calculate the curling radius, the
relevant function part for calculating curling radius with thickness
accumulation shall be used.
3) Torque compensation part: Part of the output torque of the motor
will be used to overcome the rotation inertia of the
wind-up/roll-down roll during the acceleration/deceleration. The
inertia compensation part of the inverter can be automatically
compensated automatically according to the
acceleration/deceleration rate through proper parameter setting, so
that the system can still have stable tension during the
acceleration/deceleration. The friction compensation can eliminate
the influence of the system resisting force over the tension.
3. Close-loop speed control mode
Close loop means that the tension (position) detection feedback
4Chapter 2 Tension Control Principles
signal forms a close loop for adjustment. Speed control mode means
that the inverter realizes the control by adjusting the output frequency
according to the feedback signal. The inverter under speed mode can
operate in any of the following three modes: speed sensorless vector
AIGCMD330 Series Variable Frequency Drive (VFD) User Manual (English)
The MD330 series variable frequency drive is a high-performance, versatile electrical equipment designed for controlling the speed and torque of induction motors in various industrial applications. This comprehensive user manual provides detailed instructions, technical specifications, and operational guidelines for users to effectively install, set up, and operate the MD330 model.
Key contents of the manual may include:
1. **Product Overview**: Introducing the MD330 series VFD, including its features, benefits, and compatibility with different motor sizes and power ratings.
2. **Electrical and Mechanical Specifications**: Describing the physical dimensions, input/output voltage and current ratings, frequency range, and protection features.
3. **Installation & Connection**: Instructions for proper mounting, wiring diagrams, and grounding procedures, including power supply, signal cables, and safety precautions.
4. **Setup and Configuration**: Procedures for programming the VFD using the front panel interface or external communication ports, such as parameter settings for motor data, frequency control mode, vector control, and other advanced features.
5. **Operation and Control**: Explaining how to start, stop, and adjust the motor speed using various control methods, including on/off, ramping, and acceleration/deceleration profiles.
6. **Troubleshooting**: A section dedicated to common issues, error codes, and troubleshooting steps to help resolve problems during operation.
7. **Maintenance & Service**: Guidelines for routine maintenance tasks, inspection intervals, recommended practices for cleaning and replacing filters, fuses, and components.
8. **Safety Precautions**: Emphasizing essential safety measures to prevent accidents, electric shock, and damage to the VFD or connected systems.
9. **Appendices**: Additional information such as wiring examples, software versions, and contact details for customer support.
Please note that this description is a general outline, and actual content will vary depending on the specific version and language of the MD330 series VFD user manual provided. Always consult the official documentation for accurate and up-to-date information when operating the device.
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