E-Cigarette Power Ramping for Faster Ignition Without Overshoot
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Solution Overview
Problem
The existing power control methods for electronic cigarettes result in a long power rise time due to whole-stage attenuation and proportional adjustment, leading to a slow aerosolization process and negatively impacting user experience.
Innovation Solution
A power control method that sets an intermediate power less than the target power, allowing the output power to directly reach the intermediate power at a first stage, then gradually adjust to the target power at a second stage, and maintain the target power at a third stage, with the duration of the first stage being less than the second stage, using incremental PID control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the output power of the power device is attenuated and proportionally adjusted at the whole stage, then the power overshoot is prevented, but the power rise time becomes long
Solution Approach 1:
The power control process is divided into three distinct stages: a first stage where output power directly reaches intermediate power without attenuation, a second stage where power is proportionally adjusted from intermediate power to target power, and a third stage where target power is constantly output. This segmentation allows different control strategies to be applied at different times, resolving the contradiction between fast response and overshoot prevention.
Solution Approach 2:
The patent introduces an intermediate power level that is set before the proportional adjustment phase. By first quickly establishing an intermediate power state and then gradually adjusting to the target power, the system performs preliminary action that avoids direct proportional adjustment from zero, thereby reducing overall power rise time while maintaining control stability.
2Loss of time
If the output power is directly increased to target power, then the power rise time is shortened, but the power overshoot occurs
Solution Approach 1:
The power control is segmented into three stages with different control characteristics. The first stage enables rapid power rise to intermediate level without overshoot, the second stage provides controlled proportional adjustment to target power, and the third stage maintains stable target power output. This segmentation resolves the contradiction by applying appropriate control strategies at appropriate times.
Solution Approach 2:
The patent introduces an intermediate power level as a mediator between the initial state and the target power state. This intermediate level serves as a transition point that allows the system to quickly establish substantial power output while providing a buffer for controlled adjustment, preventing direct overshoot of the target power.
3Loss of time
If the intermediate power is set close to the target power, then the second stage duration is shortened, but the first stage may cause power overshoot
Solution Approach 1:
The patent applies partial action by setting the intermediate power to a specific percentage (50%-90%) of the target power rather than equating them. This partial advancement allows the first stage to achieve substantial power output quickly while leaving sufficient margin for controlled adjustment in the second stage, preventing overshoot while minimizing second stage duration.
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 approach significantly shortens the power rise time, improving the ignition speed of the electronic cigarette and enhancing user experience by reducing aerosolization time.
Implementation Method 1
The power device is controlled through the controller to output a power to the heating element, so that the heating element heats and atomizes the atomization substrate to generate an aerosol
Data Source
AI summary
The present disclosure relates to electronic cigarettes, and in particular to an electronic cigarette and a power control method thereof. The power control method is used for controlling an output power of a power device to a heating element, and the method includes: determining a target power; setting an intermediate power according to the target power, the intermediate power being less than the target power; controlling the power device to output a power to the heating element, and enabling the output power of the power device to directly reach the intermediate power at a first stage; adjusting the output power of the power device to gradually reach the target power at a second stage, a duration of the first stage being less than a duration of the second stage; and controlling the power device to constantly output the target power to the heating element at a third stage.