Capacitor technical knowledge, principles and fundamentals
You can size a snubber capacitor and resistor perfectly, check their ratings, and still watch your switches destroy themselves during transients. The part is rarely at fault. What fails is [...]
A snubber capacitor is limited by dv/dt, peak current and pulse energy, not capacitance. Work the numbers and check a candidate part before you order.
A snubber capacitor value copied from another schematic is the most common snubber on a new board. It usually arrives from a circuit that switched at a different frequency and [...]
Every switching transition pushes current through the loop between the switch and its decoupling path. That loop has inductance, and inductance turns a change in current into a voltage: [...]
A solar inverter asks its DC-link capacitor for something harder than a peak rating. It asks for the same modest duty, repeated every day for twenty-five years. What separates a [...]
Choosing between an MLCC and a film capacitor comes down to one question: is this position about density and frequency, or about voltage, current and life? MLCCs win the first [...]
An 800 V SiC inverter pushes its DC-link film capacitor harder than any IGBT-based design did. The bus voltage climbs to the 800 V class, and the switching frequency rises [...]
Choosing a DC-link film capacitor comes down to four numbers: voltage rating and derating, ripple current, ESR, and the size that fits your inverter. Get these right and the capacitor [...]
eVTOL powertrains are rewriting the requirements for DC-link capacitors. Electric aircraft need high ripple current, low inductance, low weight and aviation-grade reliability from the film capacitors that sit on [...]
Open any box of used power supplies and you will find the same green rectangular part stamped with a code like 2J105J. The CBB22 capacitor value printed on its [...]