Tuesday, June 19, 2018

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Cornell Dubilier Intros Hi Energy DC Link Capacitors
High energy DC link capacitors.
Liberty, SC — Cornell Dubilier has introduced its Type 947D high energy density DC link capacitors for larger inverter systems. The 947D is an excellent choice for DC link applications where high bus voltage, high capacitance, and high ripple current are required for smoothing and filtering.\par \Compared with major competitive types, the 947D DC link capacitor offers up to 20 percent more capacitance in the same size case with lower ESR and higher ripple current ratings. Since a fused, segmented metallization pattern is used, the new capacitors offer greater open circuit protection and superior control of capacitance loss than competitive types.

The pattern is deposited on a low-loss, high-grade polypropylene dielectric. Built-in fuse links limit capacitance loss to a small segment within the capacitor in lieu of the larger areas of uncontrolled capacitance loss observed with non-segmented types. According to the company, the segmented feature enhances open circuit protection, limits capacitance loss and increases reliability in critical DC Link applications. The company's advanced processing, testing and 100 percent burn-in greatly reduce or eliminate infant mortality and early field failures.

Available in 130 to 3600µF and rms current ratings in excess of 100A, The capacitors are packaged in cylindrical aluminum cases with diameters of 85, 90, 100 and 116 mm. Voltage ratings range from 800 to 1300VDC. The heavy-duty M8 x 20 threaded studs or optional M6 threaded inserts are used to connect the high current terminals to the inverter's bus. An optional M12 mounting stud at the bottom of the case provides a robust mechanical connection where needed. Where increased strike distance between live parts is important for particular applications, the UL94V-0 plastic top offers greater terminal-to-case and terminal-to-terminal insulation.

Life expectancy is reportedly 200,000 hours at nameplate current ratings, voltage and temperature, and the 947D DC Link capacitor will excel at providing reliable filtering and smoothing for today's demanding applications in inverters for wind and solar energy, electric vehicles, motor drives, and UPS systems.

Contact: Cornell Dubilier Marketing, 140 Technology Place, Liberty, SC 29657 864-843-2277 Web:

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