Inputs
Capacitor current, frequency, energy pulse, bus voltage, and allowable voltage drop.
Validated reference · Power electronics
Make the DC-link assumption visible before selecting hardware.
Two inspectable relationships estimate voltage ripple for an idealized triangular capacitor-current waveform and minimum capacitance for a defined energy pulse.
Energy-pulse relationship
Cmin = 2E / (V₁² − V₂²)
A starting point for design review.
The equations are intentionally transparent. They help expose waveform, voltage-window, and energy assumptions before detailed switching, thermal, lifetime, and tolerance studies.
Engineering boundary
Replace idealized inputs before making a component decision.
Outputs
Estimated ripple and minimum ideal capacitance for the stated assumptions.
Verification
Dependency-free implementations with automated Python tests and MATLAB equivalents.
Not included
ESR, ESL, temperature, aging, switching harmonics, control interactions, or component derating.