The types of fans include negative pressure fans, circulating fans, centrifugal fans, Roots blowers, boiler induced draft fans, and copper furnace blowers.

The wire and cable industry is currently moving towards greater technological development, including product diversification and automation. Powered wire feeding frames are very common in the industry. Based on their style, powered wire feeding frames can be divided into vertical wire feeding frames and horizontal wire feeding frames. Both are wire feeding devices, differing only in structure. In the wire feeding process, frequency converters have become indispensable equipment. Frequency converters can control the speed of the motor to achieve the wire feeding speed, thereby improving the process level and production efficiency, ensuring process quality, and maximizing profits.

A frequency converter is a control device that uses the switching action of power semiconductor devices to convert power frequency power into electrical energy of another frequency. It can realize functions such as soft starting of AC asynchronous motor, variable frequency speed regulation, improved operating accuracy, power factor change, and overcurrent/overvoltage/overload protection.

​In modern industrial automation, Variable Frequency Drives (VFDs) play a crucial role in controlling the speed and torque of AC motors, greatly improving energy efficiency and process flexibility.

High-speed motors typically refer to motors with a rotational speed exceeding 10,000 revolutions per minute. They feature numerous advantages such as high efficiency, compact size, clean and environmentally friendly operation, low noise, easy maintenance, and long service life. With the advancement of industrial automation and the widespread adoption of new energy vehicles, their application scope continues to expand, and market demand is steadily growing

​With the growing adoption of variable frequency drives (VFDs) in industrial and commercial applications, the need for effective motor protection has become increasingly important.