753247 Brush and Brush Holder
Detailed Description
The brush holder is a critical mechanical-electrical component in wind turbine generators, particularly in doubly fed asynchronous generators with excitation systems or direct-drive permanent magnet generators with slip ring systems.
Its primary function is to secure, support, and guide the carbon brushes (or brushes), ensuring they maintain stable and appropriate contact pressure with the rotating slip ring surface. This enables the transmission of high-current or control signal currents between the stationary components (stator/control system) and the rotating components (rotor).
The core function of the brush holder is to hold the carbon brushes and strictly limit their movement so that they can only slide freely in the designed direction. This ensures that the carbon brushes do not tilt, jam, or vibrate excessively, thereby guaranteeing stable contact and uniform wear.
Wind turbines are typically installed in remote, high-altitude locations that are difficult to maintain (offshore wind farms are particularly challenging). Brush holders must be able to operate for long periods of time, with a design life that matches the overhaul cycle of the generator, ensuring stable operation for tens of thousands of hours and reducing the frequency of maintenance. Carbon brush wear is one of the primary factors limiting service life.
Although small in size, the wind turbine brush holder is an extremely critical and operationally sensitive component in the electrical system of a wind turbine generator. It plays a vital role in ensuring the stable transmission of high currents or critical signals between rotating and stationary components under harsh environmental conditions. The core of its design lies in precise guidance, stable constant voltage, high conductivity and heat dissipation, environmental resistance, long service life, and low maintenance requirements. High-quality brush holders and proper maintenance are essential for ensuring the reliability, efficiency, and economic benefits of wind turbine operations.
