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Estimating Electrolytic Capacitor Service Life from Ripple Current and Core Temperature
Aluminum electrolytic capacitors are often the component that sets the maintenance interval for power electronics. Their...
akknNews Voltage Derating and Surge Withstand: Setting Realistic Margins for Cost-Effective Sourcing
Every sourcing engineer faces the same tension: pay for a higher voltage rating to be safe, or buy the minimum that meet...
akknNews Cooling Strategies for Capacitor Banks: Core-Temperature Estimation and Airflow Validation
A 100 kW UPS with a 540 V DC-link bus uses a bank of aluminum electrolytic capacitors rated at 10,000 µF total capacitan...
akknNews Ripple-Current and Hot-Spot Budgeting: DC-Link Electrolytic Life in Solar Inverters
In a solar inverter, the DC-link capacitor operates close to busbars, IGBT modules and, in many cabinet layouts, under t...
akknNews Reading Bulge, Leakage, and Open-Circuit Evidence to Pick a Safer Electrolytic Replacement
When an aluminum electrolytic capacitor fails in a power supply or motor-drive board, the removed part often carries vis...
akknNews Field Failure Diagnosis: Solid Polymer vs Liquid Electrolytic Capacitors in DC-Link Duty
A 48 V DC-link rail in a telecom rectifier showed 1.1 V of ripple during a load-step test, more than three times the spe...
akknNews Specifying Power-Factor Correction Capacitor Banks: Harmonics, Overvoltage, and Bank Sizing
Application Boundary: Where PFC Capacitor Banks Apply Power-factor correction (PFC) capacitor banks are installed at the...
akknNews IGBT Snubber Capacitors: Total-Cost Drivers, Equal-Term Comparison, and Incoming Inspection
A snubber capacitor on an IGBT module is a small part with an outsized role: it clamps the voltage overshoot during hard...
akknNews DC-Link Electrolytic Lifetime in VFD Repair: Ripple, Temperature, and Replacement Sourcing
The Lifetime Model Behind Drive Failures When a variable frequency drive (VFD) returns from the field with a bulged or l...
akknNews Cross-Referencing Obsolete European Capacitor Series: Which Ratings Demand Exact Equivalence
Why legacy European capacitor series leave the market European capacitor manufacturing has consolidated heavily over the...
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