In the commutation loop of an inverter, every nanohenry counts. Laminated busbars cut loop inductance to keep switching devices inside their safe operating area.
Where Busbars Are Used in Power Conversion
- DC link — the laminated connection between the capacitor bank and the inverter bridge
- IGBT and IPM phase legs — matched busbar sets with blade terminals at module pin pitch
- Capacitor banks — multi-tab laminates sharing current evenly across parallel capacitors
- EV traction inverters — compact, fully insulated assemblies for high-voltage platforms
Why Inductance Matters Here
When an IGBT or SiC MOSFET switches, the stray inductance of the DC loop appears directly as overshoot voltage across the device: V = L × di/dt. Faster devices make this worse, not better. A laminated busbar places the forward and return conductors face-to-face inside one dielectric stack, which cancels most of the loop area — and with it, most of the overshoot.
- Layer count and conductor width tuned with your DC link capacitor placement
- Standoff and creepage reviewed for your voltage class
- Terminal pitch matched to module datasheets to avoid adaptation hardware