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10 months ago in Power Systems Engineering By Rani

Can bootstrap drive work in a full-bridge current-source inverter?

I'm designing a full-bridge current-source inverter. Can I use bootstrap technique for the high-side switches?

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By Veena Answered 6 months ago

Theoretically yes, but practically challenging. In a current-source inverter, the floating switch voltage swings widely—far more than in a voltage-source inverter. This makes it hard to keep the bootstrap capacitor charged reliably. For low-duty cycles, it might limp along, but for robust operation, isolated DC-DC converters for each high-side driver are the safer, more reliable choice. Bootstrap is elegant but fragile here. Don't risk it for production.

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