Planar Drive Inductive Data Transfer via PWM Field Modulation
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Solution Overview
Problem
Current planar drive systems face challenges in reliable data transmission between the stator and rotor, particularly in generating and controlling alternating magnetic fields for efficient energy transfer and data communication.
Innovation Solution
The planar drive system employs a stator with energizable conductors and a rotor magnet device, utilizing pulse-width modulation for current control to generate alternating magnetic fields, allowing for data transmission by influencing the energization of stator conductors to change the induced voltage in the rotor coil, and includes an influencing device to manage the current control and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If pulse-width modulation is used for current control to generate alternating magnetic fields, then data transmission capability is improved, but system complexity increases due to the need for additional influencing devices and control mechanisms
Solution Approach 1:
The stator conductors serve dual functions: they generate the alternating magnetic field required for both inductive energy transfer and data transmission. By modulating the energization of these same conductors, the system encodes data in the alternating voltage induced in the rotor coil, eliminating the need for separate communication hardware and reducing overall system complexity.
Solution Approach 2:
The system uses its own operational components (stator conductors and alternating magnetic field) to perform the additional function of data transmission. The influencing device modifies the existing current control signals to encode data, rather than introducing entirely new components, allowing the system to serve itself for both energy and information transfer.
2Adaptability or versatility
If the stator temporarily influences the energization of stator conductors to transmit data, then data communication capability is improved, but the stability of the alternating magnetic field for energy transfer deteriorates
Solution Approach 1:
The system employs periodic pulse-width modulated signals to energize the stator conductors, creating a stable alternating magnetic field for energy transfer. Data transmission is achieved by superimposing data-encoded variations on this periodic energization pattern, allowing temporary deviations that carry information while the overall periodic structure maintains the magnetic field stability required for efficient inductive coupling.
Solution Approach 2:
The energization of stator conductors is made dynamically adjustable through the influencing device, which can temporarily modify the pulse-width modulation parameters to encode data. These dynamic changes are controlled and reversible, allowing the system to adapt for data transmission while maintaining the fundamental alternating field pattern necessary for energy transfer, thus balancing versatility and stability.
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 reliable data transmission and inductive energy transfer between the stator and rotor, enhancing the system's efficiency and flexibility in controlling the magnetic field for both energy and data communication purposes.
Implementation Method 1
an alternating voltage may be induced due to the alternating magnetic field
Implementation Method 2
The stator is embodied to carry out the energization of stator conductors by a current control based on a pulse-width modulation
Implementation Method 3
A magnetic interaction may be produced between energized stator conductors and the magnet device of the rotor in order to drive the rotor
Data Source
AI summary
A planar drive system comprises a stator and a rotor. The stator comprises a plurality of energizable stator conductors. The rotor comprises a magnet device having at least one rotor magnet. A magnetic interaction can be produced between energized stator conductors of the stator and the magnet device to drive the rotor. The stator is configured to carry out energization of the stator conductors so that an alternating magnetic field can be generated via the energized stator conductors. The rotor comprises at least one rotor coil in which an alternating voltage can be induced due to the alternating magnetic field. The planar drive system is configured to transmit data from the stator to the rotor, and the stator is configured to temporarily influence the energization of the stator conductors in order to temporarily cause a change with respect to the alternating voltage induced in the at least one rotor coil.