Two variable frequency air compressor to achieve simultaneous operation, usually through the following ways to achieve:
1. master-slave control mode
this is one of the most commonly used control methods. In this way, one of the frequency conversion air compressors is usually selected as the host and the other as the slave. The master is responsible for outputting control signals, while the slave receives these signals and operates synchronously with them.
- Wiring mode: The output end of the host is connected to the input end of the slave, and the control end of the host is connected to the control end of the slave. In this way, the host can send instructions such as start, stop and speed regulation to the slave.
- Parameter setting: Set parameters such as online control loading pressure, unloading pressure, number of online units, online control delay time and frequency conversion working pressure of the host in the host. The slave machine needs to be adjusted according to the setting of the host machine to ensure synchronous operation with the host machine.
2. parallel control mode
the parallel control mode is to connect two variable frequency air compressors in parallel and receive the same control signal together to realize synchronous operation.
- Wiring mode: Connect the input terminals of two variable frequency air compressors in parallel to receive the control signal from the controller. At the same time, their output terminals are also connected in parallel to balance the load and output pressure.
- Precautions: In the parallel control mode, it is necessary to ensure that the performance parameters of the two variable frequency air compressors match to avoid unstable operation or damage to the equipment due to performance differences.
3. Synchronous Control Method Based on PLC
PLC (programmable logic controller) is a commonly used industrial automation control equipment. Through PLC, multiple frequency conversion air compressors can be centrally controlled to achieve accurate synchronous operation.
- control program writing according to the actual demand, the preparation of PLC control program. The program shall include instructions for the start, stop and speed regulation of the two variable frequency air compressors.
- Signal connection: Connect the output signal of the PLC to the input terminals of two variable frequency air compressors. In this way, the PLC can send control instructions to them.
- synchronous operation through the PLC control program, the corresponding control signal is output to realize the synchronous operation of the two variable frequency air compressors. This method has the advantages of high precision, high reliability and easy programming.
4. communication-based synchronization control method
through the communication network, information exchange and synchronous control between multiple variable frequency air compressors can be realized.
- Communication protocol selection select the appropriate communication protocol and communication network, such as Modbus, Profibus, etc.
- Device Connections: Connect two variable frequency air compressors to the communication network. In this way, they can exchange information and synchronize control through the network.
- synchronous control: Send control instructions through the network to realize the synchronous operation of two variable frequency air compressors. This method has the advantages of high flexibility, easy expansion and maintenance.
5. considerations
- equipment Matching: No matter which control method is adopted, it is necessary to ensure that the performance parameters of the two frequency conversion air compressors match to avoid unstable operation or damage to the equipment due to performance differences.
- Maintenance: Regularly maintain the equipment, including cleaning, lubrication, inspection, etc., to ensure the normal operation of the equipment and extend its service life.
- Security Protection: Add necessary safety protection measures in the control system, such as overload protection, short circuit protection, phase loss protection, etc., to ensure the safety of equipment and personnel.
In summary, the two variable frequency air compressors can be operated simultaneously through master-slave control, parallel control, PLC-based synchronous control or communication-based synchronous control. In practical applications, the appropriate control method can be selected according to specific needs and site conditions.
