Dual-Output Charging Circuit Single Controller Voltage Regulation
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Solution Overview
Problem
Existing electric vehicle on-board chargers with dual output ports have complex and inconvenient voltage/current regulation, requiring separate controllers for each port, which is inefficient and difficult to manage.
Innovation Solution
A dual-output port charging circuit with a primary and secondary switching circuit, rectification switches, and a controller that uses modulating waves and zero-cross delays to regulate output voltages and currents, allowing a single controller to manage both ports with accurate and flexible voltage regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate controllers are used for each output port, then voltage/current regulation precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the control functions for both output ports into a single controller. The controller receives feedback from both ports and generates modulation waves to control the switching circuits, eliminating the need for separate controllers while maintaining regulation precision through unified feedback control.
Solution Approach 2:
The single controller is designed to perform multiple functions: it controls both output ports, generates modulation waves for switching circuits, and processes feedback from both ports. This multi-functional design reduces device complexity while maintaining precise regulation capability.
2Measurement precision
If separate controllers are used for each output port, then control accuracy is improved, but weight increases
Solution Approach 1:
The patent combines multiple control functions into a single controller, eliminating redundant controller hardware. This integration reduces the overall weight of the charging circuit while maintaining control accuracy through unified feedback processing and modulation wave generation.
3Device complexity
If a single controller is used for both output ports, then device complexity is reduced, but voltage regulation flexibility deteriorates
Solution Approach 1:
The patent implements dynamic control through modulation waves that can independently adjust the switching duty cycles for each output port. The controller dynamically processes feedback from both ports and generates real-time control signals, enabling flexible voltage regulation despite using a single controller.
Solution Approach 2:
The system uses feedback from both output ports to continuously monitor voltage and current conditions. The controller processes this feedback and adjusts modulation waves accordingly, enabling independent and flexible voltage regulation for each port while maintaining simplified device architecture.
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
Enables flexible and accurate voltage regulation of both output ports with a simple structure, low cost, and strong anti-jamming capabilities, reducing complexity and weight.
Implementation Method 1
a transformer connected to the three circuits
Data Source
AI summary
A dual-output port charging circuit includes a primary switching circuit, a secondary first switching circuit, a secondary second switching circuit, a transformer connected to the three circuits, and a controller. The controller receives and samples an output voltage and an output current of the secondary second switching circuit, the output voltage and the output current are compared with a reference value, and a compensation is made, so as to eventually control an on-off time of a switch in the primary switching circuit; and the controller receives and samples an output current of the primary switching circuit, a zero-cross delay is calculated through a zero detection, so as to control an on-off time of a rectification switch in the secondary second switching circuit. One controller is used to flexibly control voltages of two direct current output ports with accurate voltage regulation and strong antijamming capability.