Half-Bridge Gate Driving for EMI and Switching Loss Balance
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Solution Overview
Problem
Existing current converters with half-bridges experience high electromagnetic interference and power losses due to rapid switching times, which are minimized by existing methods.
Innovation Solution
A method for actuating switch elements in a current converter that involves maintaining a switching status and adjusting current profiles at control contacts using gate drivers to minimize electromagnetic interference and power losses by varying current profiles based on operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If switching time is shortened to minimize power loss, then power loss is reduced, but electromagnetic interference increases
Solution Approach 1:
The gate driver dynamically adjusts the current profile during the switching process based on real-time operating conditions. The control contact receives a time-varying current profile that adapts to the switching state, allowing optimization of both switching speed and electromagnetic interference reduction throughout the switching transient.
Solution Approach 2:
The invention changes the current profile parameters (amplitude, duration, shape) at the control contact of the switch element during the switching process. By varying these electrical parameters dynamically, the system achieves reduced electromagnetic interference while maintaining acceptable switching times and power loss characteristics.
2Object-generated harmful factors
If switching time is increased to reduce electromagnetic interference, then electromagnetic interference is reduced, but power loss increases
Solution Approach 1:
The gate driver applies a structured, multi-phase current profile to the control contact during switching. This periodic action with controlled stages allows the switch element to transition smoothly through different conducting states, reducing electromagnetic interference while maintaining efficient power transfer and minimizing losses.
Solution Approach 2:
The system monitors operating conditions and adjusts the current profile at the control contact accordingly. This feedback mechanism allows real-time optimization of the switching process, adapting the current characteristics to minimize both electromagnetic interference and power loss based on actual operating parameters.
Data Source
AI summary
The invention relates to a method (400) for actuating a first (120) and a second (140) switch element of a half-bridge (110) in a current converter (100). The method comprises the steps of: setting (430) a first variation of the first current profile by means of a first gate driver (122) at the first control contact (124) for closing the first switch element (120); and setting (432) a second variation of a second current profile by means of the second gate driver (142) at the second control contact (144) during the closure of the first switch element (120).