It has become normal for the permanent magnet motor in aluminum plant to use closed cooling tower for operation cooling. The closed cooling tower adopts the Internet of things control in the process of cooling the permanent magnet motor to achieve constant temperature and constant pressure control, so as to guarantee the stable operation of the permanent magnet motor. Huatal Group has recently sent 4 sets of HBW counter flow type closed cooling towers to an aluminum plant in Argentina. Professional system services and high quality products have enabled the whole project to be successfully delivered and used.