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
