COREVIA Application Guide
Aluminum Electrolytic Capacitors for Industrial Drives and VFDs
Selection guidance for aluminum electrolytic capacitors used in industrial motor drives and variable-frequency drive DC-link stages.
Drive DC-Link Selection
Evaluate repeated load cycles and enclosure heat
Motor drives and VFDs expose the DC-link to load changes, switching ripple and thermal cycling. Capacitor selection should follow the actual bus voltage, transient margin, ripple-current spectrum, cooling path, enclosure temperature and mounting constraints.
DC-link requirements
Define bus voltage, capacitance, ripple current, ESR and transient conditions across the intended duty cycle.
Thermal design
Account for ambient and hotspot temperature, airflow, heatsinks and neighboring power components.
Mechanical fit
Confirm case dimensions, terminals, mounting, vibration exposure and required endurance.