Reasons why tunnel fans need frequency converters
In each supporting point structure of the tunnel fan, there is a frequency converter. Although it cannot be said that it is an indispensable part of the tunnel fan, it plays a very effective role in the tunnel fan. why do you say that Let's look at the importance of installing it.
1) It can reduce the starting current of the tunnel fan: when the inverter is used to run, the frequency and working voltage will increase relatively with the acceleration of the motor, and the starting current of the centrifugal fan will be limited to below 150% of the rated current. When starting directly with a DC power supply, the starting current is 6 to 7 times, which will cause mechanical and electrical shocks. This starting method greatly reduces the impact of excessive starting current on the power grid, and enables the up-converter to extend the service life of the AC voltage stabilizer and switchgear.
2) Analysis of variable speed characteristics and environmental protection and energy saving of centrifugal fans: The inverter controls the exhaust air volume according to the variable speed, improves the efficiency of the motor, and saves electromagnetic energy.
3) It can complete the remote operation of the tunnel fan: it consists of the "data link" of the intermediate monitoring center and data transmission system software, call response system software, supervision and instant alarm system. The terminal operation data sent back by the "data link" of the mobile phone memory card in the center console and the data transfer system. The staff monitors the operation of each terminal equipment of the system in real time, so as to achieve the purpose of real-time monitoring system, synchronous control, and instant early warning information.
Therefore, for tunnel fans, the installation of the frequency converter will not affect its normal operation, but if an up-converter is installed, it can reduce equipment failures, extend its service life, and monitor its safe operation at any time. If there is a risk, it can be fed back to the staff in time for treatment. Therefore, it is recommended that customers choose a paired tunnel fan and must add a frequency converter to the part.