Their ability to conform to surface irregularities and assembly tolerances minimises localised increases in thermal resistance and reduces the likelihood of hotspot formation.
As operating voltages increase, thermal interface materials mustmeet requirements that extend well beyond heat transfer. Interface defects, voids, delamination, contamination and material degradation can create localised electric field concentrations that may lead to partial discharge (PD), electrical treeing, insulation breakdown and ultimately catastrophic failure. As a result, material selection for next
generation PV inverters must account for a broader set of reliability parameters, including dielectric strength, longterm insulation stability, oil bleed performance, non-volatile content (NVC), moisture resistance, thermal-aging stability and interface adhesion durability. From a reliability standpoint, these characteristics
can be just as critical as thermal conductivity when evaluating longterm inverter performance.
For applications exposed to severe vibration, mechanical loading or harsh environmental conditions, thermally conductive silicone adhesives offer additional advantages. These materials combine thermal management with secure mechanical attachment, allowing engineers to fasten sensors, gate driver components and auxiliary electronics while maintaining electrical insulation and thermal stability. Like silicone gels, silicone
adhesives accommodate differential thermal expansion and reduce stress concentrations during repeated
thermal cycling. Because they provide both heat transfer and structural bonding, silicone adhesives can simplify system design while enhancing overall robustness and longterm reliability.
As inverter architectures continue to evolve, the most effective thermalmanagement solutions will be those that deliver a balanced combination of thermal performance, insulation reliability, environmental durability and mechanical stress mitigation throughout the inverter’s lifetime. From a system level reliability perspective,
silicone-based materials offer reliability that helps control temperature distribution, absorb mechanical stresses, preserve insulation integrity and support longterm inverter performance. By integrating thermal management, electrical protection, environmental resistance and stress relief functions into a singlematerial platform, silicone technologies help engineers address the increasingly complex challenges associated with higher voltage, higher power PV inverter systems.
Fred Feng
Partners in Automation
Reliably detect ir ide beam sensor
eliably detect irregular objects Wide beam sensor
gular objects
Turck Banner Ltd. Blenheim House, Blenheim Court, Wickford, Essex, SS11 8YT
Tel: 01268 578888
sensors@turckbanner.co.uk
www.turckbanner.co.uk
25mm wide beam to detect the leading edge of an object.
Part of our leading edge detection solution portfolio. Scan the QR code to see more.
https://tinyurl.com/ym8t4u6v 45
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