Shared Converter Circuit for Multi-Coil Aerosol Induction Heating
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Solution Overview
Problem
Existing aerosol generating devices face challenges in efficiently heating aerosol generating materials without combustion, particularly in providing controlled and efficient inductive heating for these devices.
Innovation Solution
The circuitry for a plurality of induction elements in an aerosol generating device includes a plurality of driver arrangements that convert direct current into alternating current for inductive heating of susceptors, using a common converter to step up the input potential and provide a switching potential for the driver arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate converter is provided for each driver arrangement, then each driver arrangement can have independent voltage control, but the device complexity and cost increase significantly
Solution Approach 1:
The patent merges multiple separate converters into a single common converter that serves all driver arrangements. The common converter generates a switching potential that is distributed to multiple driver arrangements through supply buses, allowing voltage control across multiple induction elements without requiring individual converters for each driver arrangement.
Solution Approach 2:
The common converter is designed to perform multiple functions by providing switching potential to multiple driver arrangements simultaneously. This universal converter can support different numbers of driver arrangements (two, three, four, or more) and can selectively enable different combinations of driver arrangements through controlled supply to different supply buses.
2Ease of operation
If multiple converters are used for multiple driver arrangements, then each driver arrangement has dedicated voltage control, but the manufacturing cost increases
Solution Approach 1:
The patent combines multiple converter functions into a single common converter unit, reducing the total component count and manufacturing cost. The common converter uses shared inductors, capacitors, and control circuitry to serve multiple driver arrangements, eliminating the need to manufacture and assemble multiple separate converter units.
Solution Approach 2:
The common converter is designed as a universal power supply unit that can support various configurations of driver arrangements. This multi-functional design allows the same converter hardware to serve different numbers and combinations of driver arrangements, reducing per-unit cost through economies of scale in manufacturing.
3Device complexity
If a common converter is used for all driver arrangements, then device complexity and cost are reduced, but independent voltage control capability is limited
Solution Approach 1:
The patent segments the common converter's output into multiple independent supply buses, each capable of being selectively enabled or disabled. This segmentation allows the common converter to provide independent voltage control to different groups of driver arrangements by controlling which supply buses receive the switching potential at any given time.
Solution Approach 2:
The system implements dynamic voltage control by selectively enabling different supply buses based on operational requirements. The common converter can dynamically adjust which driver arrangements receive power and at what voltage levels, providing flexible independent control despite using a single converter unit.
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 enables efficient and controlled inductive heating of aerosol generating materials, reducing complexity and cost by using a common converter for all driver arrangements, thereby improving the performance and efficiency of the aerosol generating device.
Implementation Method 1
a converter arranged to step up an input potential to provide the switching potential in use
Implementation Method 2
the plurality of induction elements being for inductive heating of one or more susceptors for heating aerosol generating material in use
Implementation Method 3
the plurality of induction elements being for inductive heating of one or more susceptors
Data Source
AI summary
Circuitry for a plurality of induction elements for an aerosol generating device is disclosed. Each of the plurality of induction elements is for inductive heating of one or more susceptors for heating aerosol generating material in use. The circuitry includes a plurality of driver arrangements, each one of the plurality of driver arrangements being arranged to provide, from an input direct current, an alternating current to a respective one of the plurality of induction elements in use. Each driver arrangement includes one or more first transistors each controllable by a switching potential to substantially allow current to pass therethrough in use. The circuitry also includes a converter arranged to step up an input potential to provide the switching potential in use, the converter being common to each of the plurality of driver arrangements.