Wound Rotor Motor: Explore its unique charm and wide application

In the vast world of electric motors, the wound rotor motor (Wound Rotor Motor) has become an indispensable part of the industrial and scientific research fields with its unique structure and wide application fields.

The wound rotor motor, whose rotor winding uses terminal posts connected at the end, allows the motor to change the rotor impedance through external resistance, thereby adapting to different load requirements and speed control. Compared with the common squirrel cage rotor motor, the wound rotor motor performs well in heavy-duty applications that require high initial torque, such as steel mills, hoists and cranes, transmission shafts, and other heavy machinery workshops.

The working principle of the wound rotor motor is based on Faraday's law of electromagnetic induction. When alternating current is passed through the stator winding, a rotating magnetic field is generated. This rotating magnetic field interacts with the closed conductor in the rotor, thereby inducing current in the conductor. According to the Lorentz force principle, the charged conductor is subjected to force in the magnetic field, which drives the rotor to rotate. Since the rotor winding can be connected to an external resistor, the magnitude and phase of the rotor current can be changed by adjusting the resistance value, thereby achieving precise control of the motor speed and torque.

In addition to the basic speed regulation function, wound rotor motors have other significant characteristics. Their structure is sturdy and durable, and they can withstand large mechanical and thermal stresses. Since the rotor winding can be connected to an external resistor for impedance matching, the motor can maintain high efficiency and stability during startup and operation. Wound rotor motors also have good overload capacity and starting performance, and can operate stably for a long time under harsh working conditions.

In terms of application areas, wound rotor motors have shown a wide range of applicability. In industrial production, they are widely used in power drive occasions such as pumps, fans, compressors, etc., providing stable and reliable power support for various mechanical equipment. Wound rotor motors also play an important role in occasions that require precise speed control and high torque output, such as new energy vehicles, servo drives, etc. Through advanced control algorithms and vector control technology, precise speed regulation and high dynamic performance of the motor can be achieved to meet the needs of various complex working conditions.

With the continuous development of science and technology, wound rotor motors are also constantly innovating and upgrading. For example, some advanced wound rotor motors use new materials and optimized designs to improve energy efficiency and reliability, and reduce operating costs and maintenance difficulties. At the same time, the development of intelligent technology has also made the control of wound rotor motors more precise and intelligent, realizing real-time monitoring and fault diagnosis of motor status, and improving production efficiency and safety.