Technical Description
The invention is a Grid Disturbance Compensation Module (GDCM) framework that connects to the DC side after the rectification stage of a main power conversion unit to eliminate low-frequency ripple components. By continuously evaluating capacitor thermal stress indicators and injecting an antiphase compensation voltage via an H-bridge converter coupled through a step-down transformer, it dynamically shields the reliability-critical DC bus capacitor from grid distortions and unbalance without requiring expensive active front-end rectifiers.
Problems Addressed
- Thermal Failure of DC Bus Capacitors
- Inadequate Ripple and Harmonic Isolation
- Lack of Cost-effective Protection for ASDs
- Prohibitive Cost and Complexity of Preexistsing Systems
Tech Features
- Grid Disturbance Compensation Module (GDCM)
- Antiphase Voltage Injection Technique
- Capacitor Heating Factor (CHF) Estimation
- Step-Down Transformer Impedance Scaling
- Normally Closed (NC) Dynamic Relay Disconnection
- High-Frequency H-Bridge PWM Control
Target Audience
- VFD & Factory Automation Engineers
- Industrial ASD Manufacturers & Operators
- Power Electronics & Heavy Industrial Inverter Sectors
Tech ID: P16-2130 TRL 4 Patent Status: Granted Available For Exclusive and Non-exclusive License
