Resonant Power Supply Circuit for Multi-Voltage Output Switching
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Solution Overview
Problem
Existing resonance power supply circuits require separate circuits for each output voltage, leading to increased size and cost due to the lack of a single circuit capable of outputting multiple different voltages efficiently.
Innovation Solution
A resonance power supply circuit that includes a transformer with primary and secondary winding wires, switching elements, a resonance capacitor, rectification elements, and a feedback circuit, allowing for the generation of multiple output voltages using a single small-size and inexpensive circuit configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate resonance power supply circuits are prepared for each output voltage, then the output voltage can be accurately controlled, but the device size and cost increase
Solution Approach 1:
The patent implements a single resonance power supply circuit that can output multiple different voltages by dividing the secondary winding wire into multiple winding wire units and using an output voltage switching circuit to select different combinations of rectification diodes and capacitors, making the circuit universal for multiple output voltage requirements
Solution Approach 2:
The secondary winding wire is divided into multiple winding wire units, and the output voltage is segmented into multiple levels by connecting different numbers of series capacitors and selecting different rectification diodes, allowing precise output voltage control without requiring separate circuits for each voltage level
2Measurement precision
If separate resonance power supply circuits are prepared for each output voltage, then the output voltage can be accurately controlled, but the cost increases
Solution Approach 1:
The patent implements a single resonance power supply circuit that can output multiple different voltages by dividing the secondary winding wire into multiple winding wire units and using an output voltage switching circuit to select different combinations of rectification diodes and capacitors, making the circuit universal for multiple output voltage requirements
Solution Approach 2:
The circuit uses switching elements to selectively connect or disconnect different capacitor combinations and rectification diodes based on the required output voltage, allowing the same hardware components to be reused for different voltage outputs rather than requiring separate circuits for each voltage level
3Device complexity
If a single circuit outputs multiple different voltages, then the device size and cost are reduced, but the circuit complexity increases
Solution Approach 1:
The patent uses switching elements to dynamically reconfigure the circuit connections between capacitors and rectification diodes based on the required output voltage, allowing the circuit to adapt its configuration in real-time to provide different voltage outputs while maintaining a compact single-circuit design
4Device complexity
If a single circuit outputs multiple different voltages, then the device size and cost are reduced, but the control complexity increases
Solution Approach 1:
The patent includes a current detection circuit that detects the current flowing in the load circuit and feeds this information back to the controller, which then automatically adjusts the output voltage switching circuit to select the appropriate voltage level, reducing the need for complex manual control while maintaining adaptability
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 the output of multiple different voltages using a single circuit, reducing size and cost while maintaining efficiency and stability across varying load conditions.
Implementation Method 1
a controller that alternately turns on and off the first switching element and the second switching element to cause the primary winding wire and the resonance capacitor to resonate with each other
Implementation Method 2
cause a primary winding wire in a transformer and a resonance capacitor to resonate with each other to cause a secondary winding wire to induce an alternating-current voltage
Data Source
AI summary
The resonance power supply circuit is provided with a transformer provided with primary and secondary winding wires, first and second switching elements for applying a rectangular wave voltage to one end of the primary winding wire, a resonance capacitor connected to the other end of the primary winding wire, and a control unit that alternately turns on and off the first and second switching elements. The resonance power supply circuit is further provided with a first output circuit including first and second rectification elements, a first capacitor, an output capacitor, and a backflow prevention rectification element, a second output circuit including third and fourth rectification elements, a second capacitor, the output capacitor, and a third switching element provided between the second capacitor and the output capacitor, and a circuit for providing, as feeding back, voltage information indicating a first voltage of the first capacitor to the control unit.