PressPack
Highlights from the experimental works
- Partial discharge experiments in various insulation liquid environments
- Electrical, optical and acoustic detection methods
- Emulating various power semiconductor geometries
- One bar and pressurized environment (pressure vessels)
- Long-term dielectric voltage stress in various insulation liquid environments
- With and without silicon gel, Parylene and extra polyimide cover, silicon oil, natural oils, synthetic and natural esters, fluorinert, perfluorpolyethen (Galden)
- DC voltage endurance tests up to maximum specified voltage for test objects
- Test objects like 6.5 kV IGBT and diode chips, and DCB substrates
- One bar experiments under controlled heat and humidity conditions (climate chambers)
- Long-term chemical compatibility experiments
- Between silicon gels for IGBT protection and various adjacent liquids like synthetic ester, natural esters, fluorinert and perfluorpolyethen (Galden)
- "Early warning" hard pressure experiments of materials and encapsulations
- High pressure slew rates 0 (vacuum) → 300 →1 bar
- IGBT module, capacitor element, IGBT driver, 5 magnetic core materials , current sensor, pressure sensor
- Various experiments with capacitor metallized PP-film technologies
- Self-healing experiments of PP-films in synthetic ester at one bar
- Liquid compatibility experiments with PP-films in synthetic ester at one bar
- Live endurance tests of capacitor elements in pressure vessel up to 300 bar
- MPP DC-link capacitor elements
- CeraLink ceramic capacitor technology
- Characterization according to IEC 61071:2007, voltage up to 1.5x rated DC, current up to rated AC
- Special test cell developed with separate controls for DC voltage and AC current
- Solving HSE concerns by limiting possible short circuit energy infeed to pressure vessel
- Live endurance test of complete pressure tolerant converter modules in pressure vessel
- Including 6.5 kV IGBT modules with various insulating systems
- Including 3.3kV and 6.5kV IGBT drivers with both electrical and optical fiber interface
- Including 6.75kV metallized PP-film DC-link capacitors
- Including sensors for voltage, current, temperature, pressure, humidity
- Special test cell developed with separate voltage supplies for continuous operation and for insulation testing
- Pressure vessel certified to 500 bar
- Solving HSE concern by limiting possible short circuit energy infeed to pressure vessel