Film Capacitors – Made in Germany

Film Capacitors for Electromobility Applications

In times of e-mobility, the demand for reliable, durable and partly customer-specific film capacitors is constantly increasing. WIMA offers a wide range of components, from standard capacitors to components specially configured according to customer specifications. All capacitors are made in Germany and comply with the well-known WIMA quality standard.

Specific e-Mobility Applications

NEW: DC-Link Capacitors for SiC-Power Semiconductors

WIMA Low-Inductance (LI) DC-LINK capacitors are characterized by a flat, space-saving design with particularly low self-inductance. They are therefore particularly suitable for applications in combination with silicon-based SiC power semiconductors.

Advantages

  • The LI configuration with a flat, space-saving design is available for all types and contact configurations
  • Existing capacitor designs can be easily 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 configurations.

Properties

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

WIMA DC-Link LI


Impedance Change with Frequency for Reference Design

Vergleich Impedanz vs. Frequenz Referenz-Design  
Cr = 500 µF ±10%
ESR = 0.46 mΩ at 1kHz
fR ~42.5 kHz -> ESL ~30nH

Impedance Change with Frequency for LI Design

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

NEW: Robot Manufacturing of WIMA Capacitors

In an effort to improve production processes in terms of product quality and cost efficiency, WIMA is increasingly converting to state-of-the-art robot technology. This saves time and resources and also increases productivity in our capacitor production with regard to large-volume needs of our customers.

Advantages

  • Automated production of all common WIMA DC-LINK capacitors with tab connections
  • Assambly from the winding element to the finished capacitor in one process line


  • Increase in efficiency due to shorter throughput times
  • High quality due to precise robot control
  • Optimized production process for medium an large series.

Robot manufacturing

Examples for customized solutions

Example 1 customized DC-Link capacitors Example 2 customized DC-Link capacitors Example 3 customized DC-Link capacitors Example 4 customized DC-Link capacitors