In response to the rapidly growing demand for higher-performance DC link capacitors for EV chargers, Cornell Dubilier (CDE) has expanded its standard-product offerings and brought to light its advanced custom capacitor capabilities.
While the inverter circuitry at the heart of EV charging stations may seem familiar to design engineers, there are operational, environmental, and mechanical demands that make Level 3 EV charging stations unique. The latest designs are pushing voltages and current handling to higher levels to shorten recharge times.
Components available include screw terminal and snap-in aluminum electrolytics as well as polypropylene film capacitors; air or water-cooled types, with oil-impregnated or dry-epoxy construction. Constructions include multiple terminal options in metal or plastic cases. CDE’s process begins with the customer providing the required specifications, including life and other application requirements. These specifications help determine if a standard or custom solution is recommended. To validate the recommendation, CDE utilizes advanced in-house thermal modeling and product testing capabilities. CDE has dedicated engineering resources to design custom DC link capacitors that meet the exact power requirements and unique mechanical packaging to fit complex applications. On the manufacturing side, the company has multiple North American manufacturing facilities.
CDE’s custom-engineered DC Link capacitors are designed specifically for Level 3 EV charging applications. The high-power demands of Level 3 charging require robust DC link capacitors, having exceptional life and reliability over a broad range of operating conditions. CDE offers high capacitance values with low inductance (< 5 nH), high ripple current (100s of Amps), self-healing, and low loss dielectrics. Voltage Range: 450 Vdc to 3800 Vdc. -40 °C to +135 °C Operating Temperature, with life expectancies of 200,000 hours typical.
Type MXT Series Metallized Polypropylene Film Capacitor, designed to suppress conducted electromagnetic/radio frequency interference (EMI/RFI) at a circuit’s power input. These capacitors are perfect for use in harsh environments having met the demanding 85/85 THB (Temperature, Humidity, Bias) test requirements. Class X2 capacitors, like the MXT, are typically connected across the AC input to prevent interference from spreading through power lines or other devices on the same circuit.
Type MYH series of Y2, EMI/RFI suppression capacitors are designed for harsh environments. The MYH series is AEC-Q200 qualified, meets a 2,000-hour THB (Temperature, Humidity, Bias) life test, and has applications in motors, AMR (Automated Meter Readers), UPS, power supplies, charging systems, and appliances. These Y2, line-to-ground capacitors filter out electromagnetic noise and have multiple international safety agency approvals.
The MXH series is AEC-Q200 qualified, meets a 2,000-hour THB (Temperature, Humidity, Bias) life test, and has applications in motors, AMR (Automated Meter Readers), UPS, power supplies, charging systems, and appliances. These X2, across-the-line capacitors filter out electromagnetic noise and have multiple international safety agency approvals.