High-Efficiency Rotor Assembly for 120kw to 200kw EV Motors

• Customization: Available
• Type: PMSM
• Warranty: 1 Year
• Material: Silicon Steel Sheet
• Magnet Type: N50uh or N53uh,NdFeB
• Power: 120kw~200kw Pmsm Motor
• Transport Package: Wooden Case Packing for Ocean Shipping or Air
• Specification: depend on motor size
• Trademark: longnai Edrive
• Origin: Changzhou, Jiangsu Province, China
• Production Capacity: 20000PCS/Year

Product Description

Structure and Components

• Rotor Shaft: It is the supporting component of the rotor, usually made of high - strength alloy steel. It needs to have good mechanical strength and wear resistance to bear the centrifugal force and torque generated when the rotor rotates at a high speed. At the same time, it also needs to ensure accurate matching with other components. In English, it is called "Rotor Shaft".
• Rotor Core: Generally, it is made by laminating silicon - steel sheets, which have good magnetic conductivity and low iron loss, effectively improving the motor's performance. There are multiple installation grooves on the core for installing permanent magnets or other magnetic materials, named "Rotor Core".
• Permanent Magnets: In the rotor assembly of permanent - magnet synchronous motors, permanent magnets are the key components for generating magnetic fields. Usually, rare - earth permanent - magnet materials such as neodymium - iron - boron are used, which have the characteristics of high remanence, high coercivity, and high magnetic energy product. They can provide a strong magnetic field for the motor, enabling the motor to have a high power density and efficiency. The English term is "Permanent Magnets".
• Front and Rear Baffles: They are used to fix the position of the rotor core and permanent magnets, prevent them from moving axially, and play a role in protecting the internal components of the rotor. In English, they can be called "Front Baffle" and "Rear Baffle".

Manufacturing Process

• Core Lamination: The silicon - steel sheets are punched into the required shape and then stacked together to form the rotor core. This process requires high - precision punching and stacking equipment to ensure the accuracy and uniformity of the core.
• Permanent - Magnet Installation: In the case of permanent - magnet synchronous motors, permanent magnets are installed in the grooves of the rotor core. The installation process needs to ensure the correct position and firmness of the permanent magnets to avoid problems such as displacement and demagnetization during motor operation.
• Shaft Assembly: The rotor shaft is installed in the center of the rotor core, and both ends of the shaft are supported by bearings. The assembly process requires strict control of the installation accuracy to ensure the smooth rotation of the rotor.

Material Selection

• Silicon - Steel Sheets: As the main material of the rotor core, silicon - steel sheets with different thicknesses and grades are selected according to the motor's performance requirements. Thinner silicon - steel sheets are beneficial for reducing eddy - current losses, while thicker ones may be used in some applications where cost is a major consideration.
• Permanent - Magnet Materials: Rare - earth permanent - magnet materials such as neodymium - iron - boron are the first choice for high - performance permanent - magnet synchronous motors due to their excellent magnetic properties. However, in some cases, other permanent - magnet materials may be considered to balance cost and performance.
• Shaft Materials: High - strength alloy steel is commonly used for rotor shafts to ensure sufficient strength and rigidity. Some special - purpose motors may use other materials such as titanium alloys to meet specific requirements.

Company Introduction

R&D ablility

Manufacturing Process

Rotor Manufacture Equipment
Test Ability