Methods for reducing common-mode current in power electronics equipment
DE102018115490B4Active Publication Date: 2026-07-16DANFOSS DRIVES OY
Patent Information
- Application Number
- DE102018115490
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2018-06-27
- Publication Date
- 2026-07-16
- Estimated Expiration
- 2038-06-27
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Abstract
Method for reducing the common-mode current in power electronic equipment comprising two or more active front-end (AFE) components (1) connected in parallel between an AC power supply network (2) and a DC link, the method being characterized by the following steps: - Determining a duty cycle of the pulse width modulation (PWM) for the AFE components (1), - Deriving a fault signal based on the determined duty cycle of PWM and a common-mode current of the AFE components (1), - Deriving a correction voltage based on the fault signal, - Deriving a DC control signal based on the derived correction voltage and a measured DC voltage of the DC link (3) and / or a DC reference, and - Controlling the power electronic equipment according to the derived DC control signal.
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Citation Information
Patent Citations
Synchronization of parallel-connected inverter units or frequency converters
EP1575156B1
Feedback control for parallel power converter synchronization
EP3544170B1
Control methods for parallel-connected power converters
WO2011000511A2