ESR And ESL Of DC-Link Capacitors

DC-link capacitors are essential in the inverter stage of electric vehicles, converting DC electricity back to AC. To prevent shock damage from voltage spikes during IGBT switching, minimizing equivalent series inductance (ESL) and equivalent series resistance (ESR) is crucial for enhancing efficiency and reducing heat dissipation.

Introducing the MFIA Impedance Analyzer

Rohde&Schwarz offers the MFIA impedance analyzer, the ideal tool for characterizing DC-link capacitors:

• Wide Measurement Range: Accurate impedance measurements from less than 1 mΩ to over 1 TΩ.
• Integrated Multi-Instrument Setup: Easily combine with LCR meters and oscilloscopes for comprehensive ESL and ESR characterization.
• LabOne Software Suite: Access a powerful toolset to record multiple parameters—ESR, ESL, capacitance, and dissipation factor—simultaneously.