The company produces different types of motors, including three-phase induction motors, which are widely used in various industrial applications. These motors come in two types of rotors: Squirrel-cage rotor and Phase wound or wound rotor. In this article, we will explore the two types of rotors used in 3 phase induction motors.
Squirrel-Cage Rotor
A Squirrel-cage rotor is the most common type of rotor used in 3 phase induction motors. It is a simple design that consists of a cylindrical laminated core with evenly spaced bars or conductors forming the rotor's cage-like structure. The core is made of cast iron or aluminum, and the bars or conductors are made of copper or aluminum.
When the stator's magnetic field rotates, it induces a current in the rotor bars. This current creates a magnetic field that interacts with the stator's magnetic field, producing torque that makes the rotor turn. The Squirrel-cage rotor has several advantages, including low maintenance, low cost, and rugged construction. However, it has a limited operating range and low starting torque.
Wound Rotor
A wound rotor, also known as a phase wound rotor or slip-ring rotor, is another type of rotor used in 3 phase induction motors. It consists of a laminated cylindrical core with conductors or wires wrapped around it. The ends of the conductors are connected to slip rings, which are cylindrical metal rings that rotate with the rotor.
When the stator's magnetic field rotates, it induces a current in the rotor coils. This current creates a magnetic field that interacts with the stator's magnetic field, producing torque that makes the rotor turn. Unlike the Squirrel-cage rotor, the wound rotor has adjustable resistance, making it suitable for applications that require variable speed or high starting torque.
Conclusion
In conclusion, 3 phase induction motors are widely used in various industrial applications. They come in two types of rotors: Squirrel-cage rotor and wound rotor. The Squirrel-cage rotor is the most common type used due to its low cost and low maintenance. However, it has a limited operating range and low starting torque. On the other hand, the wound rotor has adjustable resistance, making it suitable for applications that require variable speed or high starting torque. DAJI GROUP·ZHEJIANG DAGAO ELECTRIC MOTOR CO., LTD. is committed to producing high-quality 3 phase induction motors that meet the needs of its customers worldwide.