Introduction and application of converter bearings

Jan 05, 2024

With the rapid development of power electronics technology, converters are increasingly used in various fields, such as wind power, photovoltaics, electric vehicles, etc. As a key component in the converter, the role of bearings is crucial. This article will elaborate on converter bearings' structure, principle and application.

1. Structure and principle of converter bearings

Structure: The converter bearing mainly includes the inner, outer, and rolling elements. The inner ring and outer ring of the bearings are the fixed parts of the bearing, and the rolling elements roll between the inner and outer rings. In addition, the bearings are equipped with cages that guide the correct movement of the rolling elements.

Principle: The working principle of converter bearings is mainly based on the principle of rolling friction. As the motor rotates, current passes through the rotor to create a magnetic field, which interacts with the magnetic field in the stator to produce torque, which causes the motor to rotate. During this process, the bearings bear the radial and axial loads from the rotor and ensure that the rotor maintains a stable central position during rotation.

2. Performance requirements of converter bearings

High-temperature resistance: Since the converter generates much heat during operation, the bearings must have excellent high-temperature resistance to ensure stable performance in high-temperature environments.

High-speed performance: With the development of power electronics technology, the converter's speed is getting higher and higher, and the bearings need to withstand the load caused by high-speed rotation.

Long life: Since the converter must operate for a long time in many fields, the bearings need a long service life.

Low friction and low wear: By choosing bearings with low friction and wear characteristics, you can significantly enhance energy efficiency and minimize energy consumption. Don't overlook the impact of this small but critical component in your machinery. Make the smart choice today and see the difference it can make to your bottom line.

3. Application of converter bearings

Wind power field: Converter bearings are mainly used in the pitch system of wind power equipment. By cooperating with the pitch motor, the blade angle of the wind turbine rotor can be adjusted. When the wind turbine encounters special circumstances during operation, the converter bearing can enable the pitch system to respond promptly and adapt to changes in wind speed by adjusting the blade angle to ensure the normal rotation of the wind turbine.

In addition, wind power equipment usually needs to operate in harsh environments, so the durability and stability of bearings are extremely high. As a key component, converter bearings need high precision, stiffness, low friction and other characteristics to ensure that wind power equipment can maintain good performance and stability during long-term operation.

With the continuous development of wind power technology, the performance requirements for converter bearings are increasing. Many bearing manufacturers continue to conduct technological research, develop and innovate, and launch more efficient and reliable converter-bearing products to meet market demand. At the same time, wind power equipment manufacturers are constantly improving design and production processes to improve wind power equipment's overall performance and stability.

Photovoltaic field: In photovoltaic power generation systems, the converter is one of the important components that converts DC power into AC power. In this process, the bearings must withstand the double test of high rotation speed and temperature to ensure the system's stable operation. In addition, in photovoltaic inverters, bearings also need to withstand mechanical and thermal stress to ensure the reliability and stability of the inverter.

Electric vehicle field: In electric vehicles, the inverter is one of the key components that achieve battery energy conversion. In this process, the bearings must withstand high rotational speeds and complex mechanical loads to ensure the safety and stability of electric vehicles. In addition, with the continuous development of electric vehicle technology, the performance requirements for bearings are becoming higher and higher, and the design and manufacturing process of bearings need to be continuously improved and improved.

Other fields: Besides the above fields, converter bearings are widely used in rail transit, ships, compressors and other fields. In these areas, converter bearings must withstand high speeds, temperatures and pressures while requiring long service life and low friction.

With the continuous development of power electronics technology, converters are increasingly used in various fields. As one of the key components of the converter, the performance of the bearing directly affects the stability and reliability of the entire system. Therefore, the research and development of converter bearings is of great significance. In the future, with the continuous development of material science, manufacturing technology and design theory, the performance of converter bearings will be further improved, providing a more reliable guarantee for sustainable development in various fields.