Voltage Supply Circuit for Compact Power Delivery
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Solution Overview
Problem
Existing power supply devices are large and inefficient due to the need for high-withstand voltage transformers, making them unsuitable for portable devices, as they require increased size to accommodate a wide range of supply voltages.
Innovation Solution
A power supply circuit comprising a rectifier circuit, charging circuit, feedback circuit, and energy storage circuit that adjusts modulation voltage based on high voltage signals to maintain a constant supply voltage, reducing the need for large transformers and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transformer is used to step down high-voltage AC power into low-voltage AC power, then the power supply can provide a stable supply voltage, but the size of the power supply unit increases
Solution Approach 1:
The patent extracts and removes the transformer component from the power supply system, replacing it with a rectifier circuit that directly converts AC to DC without requiring electromagnetic transformation. This eliminates the need for large magnetic cores and windings, significantly reducing the power supply unit size while maintaining voltage conversion capability
Solution Approach 2:
The patent replaces the mechanical/electromagnetic transformer system with an electronic rectification system using semiconductor devices. The rectifier circuit uses electronic switching and diode-based rectification to achieve voltage conversion, substituting the bulky electromagnetic field-based transformer with a compact solid-state electronic system
2Adaptability or versatility
If the withstand voltage required by the transformer is increased to provide a wide range of supply voltage, then the power supply can accommodate different voltage inputs, but the size of high-withstand voltage components and the power supply unit increases
Solution Approach 1:
The patent employs a dynamic rectification control system that adjusts the rectifier's operating parameters based on the input voltage level. By dynamically controlling the switching timing and duty cycle of the rectifier circuit, the system can adapt to a wide range of input voltages without requiring high-withstand voltage components, as the voltage stress on individual components is managed through active control rather than passive high-voltage ratings
3Power
If a transformer is used in the power supply circuit, then voltage conversion can be achieved, but the circuit area increases due to the large size of the transformer
Solution Approach 1:
The patent extracts and removes the transformer from the circuit, replacing the voltage conversion function with a rectifier circuit that operates directly on the AC input. This eliminates the need for large magnetic components and associated circuit board space, significantly reducing the overall circuit area while maintaining the essential voltage conversion and rectification functions
Solution Approach 2:
The patent merges the voltage conversion and rectification functions into a single integrated rectifier circuit stage. By combining what would traditionally be separate transformer-based conversion and rectification stages into one unified electronic rectification process, the circuit achieves voltage conversion and DC output generation in a compact configuration, reducing total circuit area
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
The solution allows for a compact power supply that maintains a constant power output while reducing circuit area and enhancing operating efficiency, suitable for portable devices by dynamically adjusting charging current based on input voltage.
Implementation Method 1
The rectifier circuit is used to receive an input voltage to generate a rectified energy
Implementation Method 2
The energy storage circuit is coupled to the energy supply terminal of the power source, and is used to be charged by the charging current to pull up the supply voltage
Data Source
AI summary
A voltage supply circuit includes a rectifier circuit, a charging circuit, a feedback circuit and an energy storage circuit. The rectifier circuit is used to receive an input voltage to generate a rectified energy. The charging circuit is coupled to the rectifier circuit and has a modulation input terminal and an energy supply terminal. The modulation input terminal is used to receive a modulation voltage, and the energy supply terminal is used to selectively output a charging current according to the modulation voltage. The feedback circuit is used to receive a high voltage signal and a supply voltage, and output the modulation voltage to the modulation input terminal. The feedback circuit is used to adjust the modulation voltage according to a difference between the supply voltage and a reference voltage. The energy storage circuit is charged by the charging current to pull up the supply voltage.