Application Background

A manufacturing plant has a conveyor belt system used for transporting finished products. Due to the different processing speeds required in various production processes, the conveyor belt needs to be able to adjust its speed flexibly to meet production demands, thereby improving overall production efficiency and product quality.

Application Case

The plant decided to use the KD600 series inverter to control the conveyor belt motor to achieve precise speed control, energy-saving effects, and ensure the reliability and safety of the system operation.

Parameter Configuration

• Motor Parameters

• Type: Three-phase asynchronous motor

• Rated Power: 5.5 kW

• Rated Voltage: 380V

• Rated Frequency: 50Hz

• Rated Current: 11A

• Inverter Parameters

• Model: KD600-4T-5.5GB

• Input Voltage: Three-phase 380V

• Output Voltage: Three-phase 0~380V

• Output Power: 5.5 kW

• Output Frequency: 0~400 Hz

• Control Method: Vector control/V/F control

• Overload Capacity: 150% for 60 seconds

• Application Settings

• Acceleration Time: 10 seconds (soft start)

• Deceleration Time: 10 seconds

• Maximum Frequency: 60 Hz

• Minimum Frequency: 10 Hz

• Speed Setting: Controlled by an external potentiometer (e.g., 0-10V)

• Start/Stop Control: Controlled by an external switch

• Operation Monitoring: Real-time monitoring of running current

• Protection Functions: Overcurrent protection, overvoltage protection, overheat protection, undervoltage protection, fault alarm or stop
  

  
  

Function Parameter Settings

Step	Funtion Code	Set Value	Description
1	P0-04	1	Terminal control start and stop
2	P0-06	2	Frequency setting selection analog
3	P0-23	Set as needed	Acceleration time
4	P0-24	Set as needed	Deceleration time
5	P5-00	1	Forward running

System Integration

1. Installation and Wiring

   The KD600 inverter is installed in a control cabinet. The three-phase power supply is connected to the inverter input, and the motor is connected to the inverter output. At the same time, an external potentiometer is connected to the analog input of the inverter for speed control, and an external switch is used for start/stop control of the inverter.

2. Commissioning and Operation

   During initial commissioning, basic parameters are set, and no-load tests are conducted. After confirming there are no issues, load operation is conducted to observe whether the conveyor belt speed changes meet the set requirements and to check the operating status and protection functions of the inverter.

3. Control Scheme

• Speed Control: The conveyor belt speed is adjusted in real-time according to different process requirements by sending analog signals (e.g., 0-10V) through the external potentiometer, ensuring continuous and efficient production.

• Start/Stop Control: The conveyor belt is started and stopped via an external switch, which is simple to operate and suitable for on-site operation needs.

• Soft Start: The inverter provides a soft start function, reducing surge current during motor startup, thus protecting the motor and conveyor belt.

• High Output Torque: The inverter delivers high output torque at low frequencies, ensuring smooth operation of the conveyor belt during work.

• Operation Monitoring: Real-time monitoring of running current ensures the motor operates within the normal current range.

• Fault Protection: The inverter's built-in protection functions ensure the system automatically stops or alarms in case of abnormalities, preventing equipment damage.
  

  
  

Application Effect

After using the KD600 inverter, the conveyor belt system achieved flexible speed adjustment and reliable start/stop control, significantly improving production efficiency. The soft start function effectively reduced surge current during motor startup, protecting the motor and conveyor belt. Real-time monitoring of running current ensured the system operated within safe limits. The high output torque function ensured smooth operation of the conveyor belt at low speeds. The inverter's fault protection functions improved the reliability and safety of the system, safeguarding the production process.