Dual-Primary Power Converter for Stable Bidirectional Control Power
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Solution Overview
Problem
Existing power converters face challenges in providing a stable supply voltage for their controllers, especially in bidirectional converters where input voltage can be provided from either side, requiring separate power converters for different operational directions.
Innovation Solution
A power converter design with two primary side circuits and concurrently operated switches, allowing it to generate an output voltage using either or both input voltages, and a single control loop for simplified control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power converters are used for different operational directions in bidirectional converters, then reliable power supply for controller is achieved, but device complexity increases
Solution Approach 1:
The patent combines two separate power converter circuits into a single unified power converter with two primary side circuits sharing common components (transformer, controller, output capacitor). This merging approach provides reliable power supply for both operational directions while reducing device complexity by eliminating redundant components.
Solution Approach 2:
The unified power converter is designed with universal functionality to operate in both directional modes (first operational direction and second operational direction). The single converter can selectively generate output voltage from either first input voltage or second input voltage, eliminating the need for direction-specific separate converters.
2Measurement precision
If separate control circuits are used for different operational directions, then precise control is achieved, but control complexity increases
Solution Approach 1:
The patent merges two separate control circuits into a single unified control circuit that manages both operational directions. The controller receives feedback from the output and selectively controls either the first switch or the second switch based on the operational direction, achieving precise control while simplifying the control structure.
3Device complexity
If a single power converter is used for bidirectional operation, then device complexity is reduced, but control difficulty increases
Solution Approach 1:
The unified power converter employs dynamic switching control where the controller selectively activates either the first switch or the second switch based on the desired operational direction. This dynamic configuration allows the single converter to adapt to different operational modes, reducing structural complexity while maintaining manageable control through selective switch activation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Simplifies control and reduces complexity by using a single power converter to supply power to bidirectional converters, eliminating the need for separate power converters and control circuits.
Implementation Method 1
a first primary side winding of a transformer, a second primary side winding of the transformer, and a secondary side winding of the transformer
Data Source
AI summary
A power converter is provided, including a first primary side circuit including a first input configured to receive a first input voltage, a first primary side winding of a transformer, and a first switch coupled between the first input and the first primary side winding, a second primary side circuit including a second input configured to receive a second input voltage, a second primary side winding of the transformer, and a second switch coupled between the second input and the first primary side winding, and a secondary side winding of the transformer coupled to an output of the power converter, wherein the first switch and the second switch are configured to be switched concurrently.