Dynamic Voltage Adjustment for Notebook Power Adaptors
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Solution Overview
Problem
Conventional power adaptors for portable devices like notebook computers maintain a constant output voltage, leading to increased power supply losses and system temperature in idle states, which results in higher fan noise and reduced reliability due to inefficient voltage adjustment.
Innovation Solution
A voltage adjusting apparatus comprising a power adaptor, a first resistor, a current detecting module, a second resistor, and a voltage feedback controlling module, which adjusts the output voltage based on load variations using an inverting amplifier and resistors, allowing the output voltage to be modified by changing resistance values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the output voltage is maintained at a constant high value (19V) to ensure sufficient power supply for usage states, then the power supply capability is improved, but the power supply losses and system temperature increase in idle states
Solution Approach 1:
The patent implements dynamic voltage adjustment by introducing a control module that automatically changes the output voltage based on real-time detection of the notebook computer's usage state. When the system detects an idle state, it reduces the output voltage from 19V to a lower value (e.g., 15V), and when usage is detected, it restores the voltage to 19V. This dynamic adaptation resolves the contradiction by making the power supply capability match the actual demand, reducing energy losses during idle periods while maintaining sufficient power when needed.
Solution Approach 2:
The patent changes the voltage parameter dynamically based on the usage state. By detecting whether the notebook computer is in idle or usage state, the control module adjusts the output voltage parameter accordingly. This parameter change strategy allows the system to optimize between power supply capability and energy efficiency, resolving the contradiction between maintaining high power output and reducing energy losses.
2Power
If the output voltage is maintained at a constant high value (19V), then the power supply capability is improved, but the system temperature increases in idle states
Solution Approach 1:
The patent implements dynamic voltage adjustment that directly impacts system temperature. By reducing the output voltage from 19V to a lower value during idle states, the power supply losses decrease, which in turn reduces the heat generated by the power adaptor and internal components. This dynamic temperature control resolves the contradiction by lowering temperature during idle periods while maintaining adequate power supply capability when the notebook computer is actively used.
3Temperature
If the fan rotation speed is increased to accelerate heat dissipation due to higher system temperature, then the cooling effect is improved, but the noise increases
Solution Approach 1:
The patent applies preliminary action by preventing heat generation at its source through dynamic voltage adjustment. Instead of relying on active cooling (fan operation) to remove heat after it's generated, the system proactively reduces voltage during idle states to prevent excessive heat generation in the first place. This preliminary prevention eliminates the need for high-speed fan operation, thereby avoiding the noise problem while still maintaining effective temperature control.
4Loss of energy
If the output voltage is reduced to decrease power supply losses, then the energy efficiency is improved, but the power supply capability decreases
Solution Approach 1:
The patent resolves this contradiction through dynamic voltage adjustment based on actual power demand. The control module continuously monitors the usage state and adjusts the output voltage accordingly - reducing voltage to 15V during idle states to minimize power supply losses, and increasing voltage back to 19V when the notebook computer enters usage state to ensure adequate power supply capability. This dynamic approach ensures that power supply capability is optimized to match actual demand rather than being statically fixed.
Solution Approach 2:
The patent changes the voltage parameter dynamically based on usage state detection. By adjusting the voltage from 19V to 15V during idle periods and restoring it during usage, the system optimizes the balance between energy efficiency and power supply capability. This parameter change strategy ensures that the power supply capability is sufficient when needed while minimizing energy losses when the demand is low.
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
This solution reduces power supply losses, decreases system temperature, and lowers fan noise, thereby saving energy, improving component reliability, and reducing noise levels.
Implementation Method 1
The current detecting module is used to convert the first voltage to a second current
Implementation Method 2
The second resistor is used to convert the second current to a second voltage
Implementation Method 3
The voltage feedback controlling module is used to convert the second voltage to a third voltage
Implementation Method 4
The power adaptor is used to convert the third voltage to a fourth voltage and output the fourth voltage
Data Source
AI summary
The invention discloses a voltage adjusting apparatus including a power adaptor, a first resistor, a current detecting module, a second resistor, and a voltage feedback controlling module. The power adaptor outputs a first current first. The first resistor is used to convert the first current to a first voltage. The current detecting module is used to convert the first voltage to a second current. The second resistor is used to convert the second current to a second voltage. The voltage feedback controlling module is used to convert the second voltage to a third voltage. The power adaptor is used to convert the third voltage to a fourth voltage and output the fourth voltage.