How Does The Shaft Grounding Ring Solve The Problem of Electrical Corrosion of Motor Bearings?

In recent years, the rapid development of high-speed switching devices and pulse width modulation (PWM) technology has equipped the new energy vehicle industry with a powerful engine, ushering in a golden period of vigorous development. As the market's requirements for the range, power performance and safety of new energy vehicles continue to rise, the drive motor, as the "heart" of the vehicle, is also facing unprecedented challenges. The market not only puts forward higher requirements on the performance, safety factor and service life of the drive motor, but also expects technological innovation to break through traditional limitations and inject new momentum into the sustainable development of new energy vehicles.

During the operation of the drive motor, the high-frequency shaft voltage and current are like hidden "time bombs", threatening the stable operation of the motor at all times. When the motor is speed-controlled, the high-frequency pulse signal will generate capacitive induction in the motor bearing, thereby forming a common-mode voltage. The common-mode voltage will cause the current to pass through the bearing, causing pits, electro-corrosion spots and other damages on the bearing surface. Over time, these damages will continue to expand and deepen, resulting in reduced bearing accuracy and increased wear, and even motor failure in severe cases. According to industry statistics, in high-frequency drive motors, bearing failures caused by electrical corrosion damage have become one of the main sources of motor failures. This problem has therefore become the focus of many new energy vehicle companies and scientific research institutions.

Facing this industry pain point, Volsun has launched a series of shaft grounding ring products such as VS-RD with its profound accumulation and technical precipitation in the field of polymer material research and development for nearly 20 years. Volsun shaft grounding ring adopts a unique coated conductive fiber technology, which is like a layer of "protective armor" for the shaft grounding ring. 

On the one hand, it can effectively reduce the induced potential between the bearing and the grounded housing, and guide the current generated by the common mode voltage to a safe path to avoid direct damage to the bearing; 

On the other hand, with its excellent conductivity, the shaft grounding ring can greatly reduce the pitting damage of the bearing caused by the shaft current. In addition, Volsun shaft grounding ring also has super high wear resistance and stability. Even in extreme environments such as high temperature and high humidity, it can still maintain a stable working state, providing a solid guarantee for the safety performance of the motor drive system of new energy vehicles.

With its excellent performance and reliable quality, Volsun shaft grounding rings have become the preferred solution for mainstream electric vehicle companies to solve the problem of electrical corrosion of bearings. At present, Volsun has established long-term and stable cooperative relations with many well-known new energy vehicle companies, and its products are widely used in the drive motor systems of various new energy vehicles.