Power Supply Apparatus Mode Detection Voltage Adjustment
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Solution Overview
Problem
Existing power supply systems lack the ability to efficiently adjust power output based on the operating mode of electronic devices, leading to inefficient energy consumption in both standby and operating modes.
Innovation Solution
A power supply apparatus that includes an input voltage generator, an output voltage generator using PWM control, and a detector to determine the mode of an electronic device based on its load current, adjusting the output voltage accordingly by controlling a switching device's frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the power supply apparatus provides fixed power output regardless of device mode, then the circuit design is simple, but energy consumption is inefficient
Solution Approach 1:
The power supply apparatus autonomously detects the device's operating mode through load current monitoring and automatically adjusts its output voltage accordingly, eliminating the need for external mode indication signals. The detector continuously monitors load current, and when it exceeds a threshold indicating operating mode, it triggers the output voltage generator to switch from standby voltage to operating voltage, enabling the system to self-regulate based on actual power demands.
Solution Approach 2:
The power supply apparatus dynamically changes its output voltage parameter based on the detected operating mode. In standby mode, it provides a first output voltage optimized for low power consumption, while in operating mode, it switches to a second output voltage appropriate for full functionality. This parameter adaptation allows efficient energy usage across different operational states without requiring complex redesign.
2Measurement precision
If the power supply apparatus continuously monitors load to determine mode, then mode detection accuracy is improved, but power loss increases
Solution Approach 1:
The detector monitors load current, which is a parameter that naturally varies with operating mode. By setting an appropriate current threshold, the system achieves accurate mode detection without requiring continuous high-power monitoring circuits. The monitoring itself consumes minimal power compared to the benefits of accurate detection, and the threshold-based approach simplifies the detection logic while maintaining precision.
3Device complexity
If the power supply apparatus uses threshold-based mode detection, then the control logic is simple, but mode transition responsiveness may be delayed
Solution Approach 1:
The power supply apparatus implements a feedback mechanism where the detector continuously monitors load current and compares it against a predetermined threshold. When the load current exceeds the threshold, the feedback signal immediately triggers the output voltage generator to switch modes. This continuous feedback loop ensures rapid response to mode changes while maintaining simple threshold-based logic, as the system is always ready to transition the moment the threshold is crossed.
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 autonomous mode determination and efficient power supply to electronic devices, reducing energy consumption by optimizing power output in both standby and operating modes without external signals.
Implementation Method 1
an output voltage generator configured to generate a first output voltage by using the input AC voltage through pulse width modulation (PWM) control
Implementation Method 2
The output voltage generator may include a switching device, and generating the second output voltage may include adjusting a switching frequency of the switching device
Implementation Method 3
performing half-wave rectification on the input AC power to generate the input voltage
Implementation Method 4
perform full-wave rectification on the input AC power to generate the input voltage
Data Source
AI summary
A power supply apparatus and a method for controlling the power supply apparatus are provided. The power supply apparatus drives an electronic apparatus which may operate in a first mode or a second mode. The power supply includes an input voltage generator that generates an input voltage; an output voltage generator that generates a first output voltage by using the input voltage, and supplies the output voltage to the electronic apparatus; and a detector that determines the mode of the electronic apparatus by detecting a load of the electronic apparatus, and outputs a control signal to the output voltage generator in response to the mode of the electronic apparatus changing from the first mode to the second mode. In response to receiving the control signal, the output voltage generator generates a second output voltage that corresponds to the second mode.