Film Capacitors – Made in Germany

DC-Link capacitors

Customized DC-LINK Capacitorsfor SiC-Power Semiconductors

WIMA low-inductance (LI) DC-Link capacitors.
The capacitors are characterized by a flat, space-saving design with particularly low self-inductance. In addition to general applications, they are particularly suitable for applications in combination with silicon-based SiC power semiconductors.

Advantages

  • The LI configuration with flat, space-saving design is available for all types and contact configurations
  • Existing capacitor designs can easily be substituted with LI capacitors
  • The LI design has no restrictions regarding the energy density per volume compared to previous DC-Link configurations
  • The WIMA Single Side Cooling (SSC) achieves ideal heat dissipation with one-sided (water) cooling systems
  • The LI design is available in 2- and 3-voltage level configuration.

Properties

  • Low leakage inductance of < 10nH in almost any capacitor configuration
  • Significant resonance point shift in high frequency ranges compared to conventional designs
  • Optional: ESR-optimized design and application temperatures up to +125°C on request.

Impedance change with frequency

Reference-Design

Impedance vs. frequency reference-design
  Cr = 500 µF ±10%
ESR = 0.46 mΩ at 1kHz
fR ~42.5 kHz -> ESL ~30nH

NEW: LI-Design

Vergleich Impedance vs. frequency LI-design
  Cr = 500 µF ±10%
ESR = 0.4 mΩ at 1kHz
fR ~100 kHz -> ESL ~5nH

Examples


Example 1 customized DC-Link capacitor


Example 2 customized DC-Link capacitor


Example 3 customized DC-Link capacitor


Example 41 customized DC-Link capacitor