Wireless Power Transmission for Rotating Vehicle Components
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Solution Overview
Problem
Existing vehicle systems face challenges in powering devices like tire pressure monitoring systems, hot wire tires, and wheel lighting systems mounted on rotating components, as these devices require continuous power supply and are not easily accessible for traditional wiring.
Innovation Solution
A vehicle driving system with a wireless power transmission function that uses a driving controller to generate high-frequency AC voltage from a vehicle battery, creating a magnetic field in a primary coil, and a smoother to convert induced AC voltage into a constant DC voltage for devices like TPMS sensors, wheel lighting systems, and variable wheels, eliminating the need for device-specific batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If devices are mounted in rotating bodies (hub bearing, wheel) of the vehicle, then the devices can be integrated into the vehicle structure, but the devices are not easily supplied with power
Solution Approach 1:
The patent replaces the traditional mechanical wiring system with a wireless electromagnetic field-based power transmission system. The driving controller generates high-frequency AC voltage that creates a magnetic field in the primary coil, which induces current in the secondary coil located in the rotating body, thereby eliminating the need for physical electrical connections to rotating components.
Solution Approach 2:
The patent introduces electromagnetic fields as an intermediary medium for power transmission. The magnetic field generated by the primary coil acts as a mediator to transfer energy wirelessly to the secondary coil in the rotating body, enabling power supply without direct electrical contact.
2Reliability
If each device includes batteries, then the devices can operate independently, but the system complexity and weight increase
Solution Approach 1:
The patent creates a universal power supply system where a single wireless power transmission system can supply power to multiple different devices (TPMS sensor, wheel lighting system, variable wheel) mounted in rotating bodies, eliminating the need for each device to have its own battery while maintaining independent operation capability.
Solution Approach 2:
The patent extracts the power supply function from individual devices by implementing a centralized wireless power transmission system. Instead of each device containing its own battery, the power supply function is separated and provided externally through the wireless electromagnetic field system.
3Ease of operation
If high frequency AC voltage is generated and applied to primary coil, then wireless power transmission is achieved, but energy loss may occur
Solution Approach 1:
The patent optimizes power transmission efficiency by changing the frequency parameter of the AC voltage to high frequency. This parameter change enables effective wireless power transmission while minimizing energy loss through the electromagnetic field coupling between primary and secondary coils.
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
Enables efficient operation of various vehicle devices without batteries by wirelessly supplying power, ensuring continuous functionality and improved fuel efficiency by preventing aerodynamic losses from wheel grooves.
Implementation Method 1
a driving controller configured to generate a high frequency AC voltage corresponding to a device by using a DC voltage applied from a battery within a vehicle and generate a magnetic field by applying the generated high frequency AC voltage to a primary coil
Implementation Method 2
A smoother is configured to smooth an AC voltage induced by a secondary coil into a predetermined level of DC voltage and supply a constant voltage to the device
Data Source
AI summary
A vehicle driving system having a wireless power transmission function includes a driving controller configured to generate a high frequency AC voltage corresponding to a device by using a DC voltage applied from a battery within a vehicle and generate a magnetic field by applying the generated high frequency AC voltage to a primary coil. A smoother is configured to smooth an AC voltage induced by a secondary coil into a predetermined level of DC voltage and supply a constant voltage to the device, wherein the device is operated based on the constant voltage supplied from the smoother.