Inductive Drive Arrangement for Rotating Wheel Carrier
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Solution Overview
Problem
Inductive energy transmission to motor vehicles while driving is inefficient due to energy losses, requiring large spacing between transmitter and receiver coils, increased magnetic density, and costly synchronization, especially when transmitting to rotating vehicle components like wheels.
Innovation Solution
A drive arrangement with a wheel-mounted receiver coil and a rotationally fixed stator, where the rotor is magnetically coupled to the stator using an induced current from an underground magnetic field, allowing direct energy transfer to the wheel for acceleration and optional battery charging, eliminating the need for classical power electronics and batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If inductive energy transmission is performed to the suspended mass (bodywork) while driving, then energy can be transmitted to the vehicle, but a relatively large spacing is required between the ground and receiver coils to ensure ground clearance
Solution Approach 1:
Instead of transmitting energy to the suspended bodywork from the ground, the patent inverts the approach by transmitting energy directly to the unsuspended wheel carrier assembly that is in direct contact with the ground through the tires. This eliminates the need for large spacing while ensuring ground clearance is maintained.
Solution Approach 2:
The patent extracts the energy reception function from the suspended bodywork and relocates it to the unsuspended wheel carrier assembly. This separation allows energy transmission to occur at the point of ground contact, eliminating the spacing constraint imposed by ground clearance requirements.
2Use of energy by moving object
If transmitter coils are designed to generate sufficiently dense magnetic fields at great height above the roadway, then inductive energy transmission to suspended mass can be achieved, but efficiency is reduced and magnetic density increases
Solution Approach 1:
The patent inverts the energy transmission target from suspended bodywork to the unsuspended wheel carrier assembly. This inversion places the receiver coils at ground level where magnetic field density is naturally higher, eliminating the need to generate dense fields at great heights and thereby improving transmission efficiency.
3Object-affected harmful factors
If transmitter coils are energized only in the immediate region of the vehicle with synchronization, then magnetic field burden on surroundings is reduced, but expense for synchronizing and line laying increases
Solution Approach 1:
The patent enables the wheel carrier assembly to serve itself by incorporating receiver coils directly into the unsuspended mass. This self-service approach eliminates the need for complex ground-based synchronization systems, as energy transmission occurs automatically when the vehicle is in motion and the receiver coils are in position.
4Use of energy by moving object
If energy transmission is performed to the rotating tire, then energy can be supplied to the wheel, but additional expense is required for transmission from rotating tire to wheel carrier via sliding contacts or repeated inductive energy transmission
Solution Approach 1:
Instead of transmitting energy to the rotating tire and then to the wheel carrier, the patent inverts the approach by transmitting energy directly to the unsuspended wheel carrier assembly. This eliminates the need for complex energy transmission mechanisms between rotating and stationary components.
Solution Approach 2:
The patent extracts the energy reception function from the rotating tire and relocates it to the unsuspended wheel carrier assembly. This separation eliminates the need for sliding contacts or repeated inductive energy transmission between rotating and stationary parts.
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 configuration significantly improves energy efficiency, reduces magnetic field strength, and lowers costs by enabling shorter inductive transmission paths and more economical coil design, while providing flexible and robust synchronization.
Implementation Method 1
a current can be induced by an underground base providing a magnetic field into the at least one receiver coil
Implementation Method 2
the at least one rotor winding is energized to generate a magnetic field, so that the rotor and the stator are magnetically coupled
Implementation Method 3
the rotor can be magnetically coupled to the stator of the drive motor
Data Source
AI summary
A drive arrangement with an inductively energizable drive motor, having a wheel, a wheel carrier, at least one receiver coil that is arranged in the circumferential direction of the wheel, a stator, and a rotor arranged in a rotationally resistant manner on the wheel having at least one rotor winding that is electrically connected to the at least one receiver coil. The rotor can be magnetically coupled to the stator. In this case, the drive arrangement is configured such that a current can be induced by an underground base providing a magnetic field in the at least one receiver coil, by which the at least one rotor winding is energized to generate a magnetic field.