A New Approach to Reducing Common Mode Noise in Single MOSFET Switching Converters Using the Hybrid Balance Method
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Abstract
Objectives: This research investigates the generation of common-mode and differential-mode noise in MOSFET switching converters and examines the use of a hybrid circuit balancing technique to reduce electromagnetic interference (EMI).
Method: Single-MOSFET switching converters have an inherent characteristic: unbalanced circuits. These converters connect directly to the power source and deliver power directly to the load terminal. This unbalanced configuration creates a common-mode current, that flows through the frame ground. This research proposes a solution using a hybrid balancing technique. This method combines passive and active components to achieve optimal common-mode noise reduction. The effectiveness of this technique is evaluated based on its common-mode noise reduction ratio. The cables transmit energy signals to the load. This unbalanced circuit can create unwanted electromagnetic interference (EMI) due to the common-mode interference mechanism.
Results: The experimental results demonstrate a technique for reducing the root cause of continuous common-mode (CM) noise in switching converters. This technique involves balancing the hybrid circuit based on the common-mode noise reduction ratio. It has been shown to reduce electromagnetic interference (EMI) problems by up to 36.07 decibels.
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