Wireless Lighting System With Inductive And RF Power Transfer
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Solution Overview
Problem
Existing wireless power supply systems for lighting lack flexibility in positioning, as they require precise alignment of coils for effective power transfer, limiting the ability to change lighting setups without affecting the lighting effect.
Innovation Solution
A lighting system comprising a primary luminaire with an induction wireless power transmitter and a secondary luminaire with an energy storage unit and induction wireless power receiver, allowing for wireless power transfer and enabling the secondary luminaire to be used as a portable light source, along with RF wireless power transfer for increased flexibility in positioning, using multiple RF wireless power receiver units and DC current converters to achieve higher power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If inductive wireless power transfer is used between luminaires, then power can be transmitted wirelessly, but the coils must be aligned with respect to each other which limits positioning flexibility
Solution Approach 1:
An energy storage means (battery) is introduced as an intermediary between the wireless power receiver and the light source. This allows the luminaire to store energy when connected to the primary luminaire and operate independently later, decoupling the positioning requirements for power transfer and light emission.
Solution Approach 2:
The system transitions from a static wired connection to a dynamic wireless charging model where the secondary luminaire can be positioned flexibly during use, while only requiring approximate alignment during charging phases. The energy storage component enables this dynamic positioning capability.
2Adaptability or versatility
If wired power supply is used for luminaires, then power transfer is reliable, but the user is restricted by mains outlet position and cable length
Solution Approach 1:
The mechanical cable connection system is replaced with an electromagnetic wireless power transfer system. This substitution eliminates the physical constraints of cable length and outlet position while maintaining power supply functionality through electromagnetic induction and energy storage.
3Power
If multiple RF wireless power receiver units are used to achieve higher power transfer, then power capacity increases to 10 W, but device complexity increases
Solution Approach 1:
The power reception function is segmented into multiple independent RF wireless power receiver units that can be combined to achieve higher power capacity. Each unit operates independently at 2 W, and multiple units work in parallel to provide up to 10 W total power transfer capability.
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
The system provides a higher degree of flexibility in positioning lighting devices, allowing for use as portable lights and enabling operation without restrictions on mains outlet position or coil alignment, with the ability to transfer up to 2 W of power for most applications and up to 10 W with additional configurations.
Implementation Method 1
The induction wireless power transmitter located in the primary luminaire and the induction wireless power receiver located in the secondary luminaire together are operable to transmit electrical power from the primary luminaire to the secondary luminaire
Implementation Method 2
Since the secondary luminaire comprises an energy storage means, electrical energy transferred wirelessly from the primary luminaire to the secondary luminaire can be stored in the energy storage means
Data Source
AI summary
A lighting system comprises a primary luminaire and a secondary luminaire each having a light source. Electrical power can be transmitted wirelessly via an inductive wireless power transmission from the primary to the secondary luminaire. Electrical power can also be transmitted wirelessly via an RF wireless power transmission from a RF wireless power transmitter to both luminaires. Energy can be stored in energy storage means. Thus, true wireless lighting can be achieved.