Motor V-shaped Structure Magnetic Steel Rotor

V-Shaped Permanent Magnet Rotor

In permanent magnet synchronous motors (PMSM), the rotor structure decisively impacts the motor's efficiency, power density, and operational stability. The V-shaped permanent magnet rotor, renowned for its outstanding comprehensive performance, is widely adopted in new energy vehicles, power tools, home appliance motors, and industrial servo systems. Below, Fu from Kareqi, a motor magnet manufacturer, introduces its features, advantages, and typical applications.

The V-shaped permanent magnet rotor belongs to the category of embedded permanent magnet rotors. Its magnets primarily consist of high-performance neodymium iron boron (H/SH/UH/EH grades), embedded in a “V” configuration within the rotor core. Magnetic bridges are positioned between the magnets and on the outer sides to enhance mechanical strength and optimize the magnetic circuit. This configuration creates an angle between the magnets and the rotor core, enabling simultaneous output of both reluctance torque and permanent magnet torque.

Image of V-shaped Permanent Magnet Rotor

The core advantages of the V-shaped magnet rotor lie in its comprehensive performance and engineering adaptability. Building upon permanent magnet torque, this structure fully utilizes the rotor's magnetic reluctance difference to generate reluctance torque. This achieves the superposition of field torque and reluctance torque, enabling higher torque density and stronger output capability within the same volume. Simultaneously, the V-shaped arrangement of embedded magnets significantly increases the inductance difference between the d-axis and a-axis. This grants the motor outstanding weak-field speed regulation capability at high speeds, effectively expanding its high-efficiency operating range. It is particularly suitable for new energy vehicles and high-speed motor applications. Regarding mechanical reliability, the embedded magnet design eliminates the risk of magnet ejection during high-speed operation, eliminating the need for complex external restraint structures. This results in higher overall safety and long-term stability.

Applications: Leveraging its performance and reliability advantages, the V-shaped magnet rotor is widely adopted in new energy vehicle drive motors, industrial servo motors, robotic joint motors, and high-speed, high-power-density PMSM systems.