1.Overview：

The large industrial fan (4-7.3 m) is a common industrial machine used for space-ventilation and personnel cooling. It is commonly used in industrial plants, logistic-sand warehousing, waiting rooms, exhibition halls, stadiums, and supermarkets Industrial fans can push a large amount of airflow to the ground, forming a certain level of airflow level on the ground, which contributes to the overall air circulation the benefits are all-round ground coverage and three-dimensional circulation of air.

2.Implementation plans：

The site adopts AC380V FD300 frequency inverter driver + multi-stage permanent magnet synchronous motor control mainly driver 7.2M large industrial fan with diameter in the factory workshop, logistics park warehouse and other large space to diss the adaptation of the FD300 frequency inverter driver perfectly solves the problem that the low-frequency out torque is not enough,and the overload capability is low, which is easy to cause an alarm.

Technical requirement

(1)need low frequency and large torque output. The starting torgue is large and no over current is reported.

(2)The equipment runs smoothly and there is no jitters during the whole system operation.

(3)When the equipment is shut down, ensure that the fan stops normally and there is no fault.

(4)high reliability, able to adapt to the harsh environment of the site.

(5)low noise,improve the comfort of the environment.

3. Application advantage(FD300 frequency inverter)

(1)The FD300 frequency inverter is small size and easy to install.

(2)The FD300 frequency inverter low frequency start and stop smooth and stable, and the current stable speed after the minimum operation.

(3)The FD300 frequency inverter is low noise and improve the comfort of the environment.

(4)The multi-pole motor open loop control effect is good.

(5)The motor temperature protection response is fast.