KV CEI technology is used to enhance the performance and reliability of IGBT modules by protecting electronic systems from airborne contaminants such as dust, chemicals, and water vapor. This solution isolates the cooling system from the external environment, helping maintain optimal operating conditions and extending the lifespan of critical components.
The KV CEI system works by sealing the cooling circuit from the outside atmosphere while using a breathing chamber to manage internal pressure changes. As the fluid inside the isolation tank expands and contracts due to temperature variations, external air inflates and deflates a bladder. This design prevents evaporation and contamination while maintaining system balance.
A low pressure relief valve helps prevent over pressurization in case air becomes trapped within the fluid lines. In addition, an open shutoff valve allows air removal, making it easier to drain and refill the system with the correct fluid levels during routine maintenance. By isolating the internal tank volume from the surrounding environment, the system prevents water evaporation and keeps airborne contaminants from entering the water glycol coolant solution.
The system also includes a check valve for overpressure protection and a visual level indicator for local monitoring of coolant levels. An optional port allows the installation of a standard float switch for remote low level coolant indication, improving system monitoring and control.
According to Mosher, the KV CEI design is highly versatile and can be customized to include low level sensors and various mounting configurations to meet specific turbine requirements. This flexibility makes it suitable for a wide range of applications, particularly in wind turbines operating under demanding conditions.
The primary goal of KV CEI technology is to keep wind turbines running efficiently even in extreme temperatures while reducing the need for frequent maintenance visits. In warmer climates and high operating temperatures, the return on investment for KV CEI solutions can be achieved in just a few weeks due to improved reliability and reduced downtime.