Bus Capacitor
Definition
Large capacitors placed on the high-voltage bus to stabilize voltage during transient loads and provide local energy storage for high-frequency power demands.
Why It Matters
- Reduces voltage ripple and noise on HV bus
- Provides energy buffer for sudden load changes
- Requires precharge to prevent inrush current damage
- Sizing affects both performance and precharge circuit design
Common Pitfalls
- Undersizing capacitance leads to voltage droop during transients
- Oversizing increases precharge time and inrush current risk
- Not considering ESR (equivalent series resistance) in selection
- Ignoring temperature effects on capacitor lifetime