Technical Description
The technology discloses a system and method for balancing capacitor voltages in inverters and capacitor banks. It detects imbalance from capacitor voltages and output-current polarity, then transfers charge through a chopper inductor. A triangular carrier controls switching frequency and duty cycle so the inductor substantially discharges during charge transfer.
Problems Addressed
- DC-Link Voltage Imbalance
- Capacitor Leakage & Voltage Drift
- DC Components in Output Current
- Unequal Device Switching Delays
- Residual Inductor Charge Accumulation
- Chopper Inductor Damage Risk
Tech Features
- Hall-Effect Voltage & Current Sensing
- Current-Polarity Imbalance Detection
- Chopper Inductor Charge Transfer
- Triangular Carrier PWM Control
- Example Duty Cycle About 0.3-0.5
- Discontinuous Conduction Operation
Target Audience
- Power Electronics Manufacturers
- Inverter & UPS System Developers
- Solar Power Converter Manufacturers
- Electric Vehicle Powertrain Suppliers
- HVDC & Grid Compensation Companies
- Capacitor Bank & Ultracapacitor Integrators
Tech ID: P16-2306 TRL 4 Patent Status: Granted in US Available For Exclusive and Non-exclusive License
