Dual-Stage Boost Circuit for Ultrasonic Aerosol Atomization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Aerosol generating devices using ultrasonic vibration require high AC voltage to efficiently drive the vibrator, but existing solutions either increase the circuit size or power consumption significantly.
Innovation Solution
The device employs a dual boost circuit system, where a first boost circuit boosts the battery voltage to a moderate DC voltage, and a second boost circuit further boosts this voltage to a high peak-to-peak AC voltage using a switching mechanism, allowing efficient ultrasonic vibration without excessive size or power consumption increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a single high-ratio DC-DC converter is used to boost battery voltage to high AC voltage for the vibrator, then the required voltage transformation is achieved, but the circuit size becomes excessively large
Solution Approach 1:
The voltage boosting function is divided into two separate stages: a first DC-DC converter that performs initial voltage boosting from battery voltage to intermediate voltage, and a second DC-DC converter that performs final voltage boosting from intermediate voltage to high AC voltage. This segmentation allows each converter to have a smaller transformation ratio, reducing the size of individual components while achieving the overall high voltage transformation requirement.
2Power
If a single high-ratio DC-DC converter is used to boost battery voltage to high AC voltage for the vibrator, then the required voltage transformation is achieved, but the power consumption increases significantly
Solution Approach 1:
The voltage boosting function is divided into two separate stages: a first DC-DC converter that performs initial voltage boosting from battery voltage to intermediate voltage, and a second DC-DC converter that performs final voltage boosting from intermediate voltage to high AC voltage. This segmentation allows each converter to have a smaller transformation ratio, reducing the size of individual components while achieving the overall high voltage transformation requirement.
3Volume of stationary object
If a dual boost circuit system is used to reduce circuit size, then the voltage transformation is achieved with compact design, but the device complexity increases
Solution Approach 1:
The patent combines the control functions of two DC-DC converters into a single integrated control unit that manages both converters. The control unit receives a single control signal and coordinates the operation of both converters, synchronizing their switching operations. This merging of control functions reduces the overall system complexity compared to having two independent control systems, while still achieving the compact dual-stage voltage transformation.
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 enables the application of high AC voltage to the vibrator, enhancing aerosol generation efficiency while maintaining a compact and power-efficient circuit design.
Implementation Method 1
a first inductor having one terminal to which the first boost voltage is applied and another terminal connected to one terminal of the vibrator; a first power field-effect transistor (FET) configured to generate a first switching voltage based on a first pulse width modulation (PWM) signal received from the processor
Implementation Method 2
a vibrator configured to generate ultrasonic vibration according to the second boost voltage and atomize an aerosol generating material
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
According to an embodiment, an aerosol generating device includes: a battery configured to supply a battery voltage having a first voltage value; a first boost circuit configured to boost the battery voltage to a first boost voltage having a second voltage value greater than the first voltage value; a second boost circuit configured to boost the first boost voltage to a second boost voltage having, as a peak-to-peak voltage value, a third voltage value greater than the second voltage value; a vibrator configured to generate ultrasonic vibration according to the second boost voltage and atomize an aerosol generating material; and a processor configured to control the battery, the first boost circuit, and the second boost circuit.