Piezo Energy Transmission in Strong Magnetic Fields
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Solution Overview
Problem
Existing energy transmission devices face challenges in high-voltage systems, strong magnetic fields, and electromagnetic compatibility, where traditional methods like electrical cables and transformers are ineffective due to interference, saturation, and material limitations, and piezo transducers have issues with natural frequency and vibration behavior.
Innovation Solution
An energy transmission device with a piezo element design, where the energy input device is partially an electromagnetic field generator, operating under external magnetic fields to exert a Lorentz force on the energy generation device, allowing for efficient electrical energy transfer and transformation, particularly suitable for strong magnetic field environments like particle accelerators and nuclear spin tomographs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical cables are used to supply electrical energy, then energy transmission is achieved, but electromagnetic interference and galvanic isolation problems occur
Solution Approach 1:
The patent replaces electrical cable transmission with a mechanical vibration-based energy transmission system. The input piezoelectric crystal converts electrical energy to mechanical vibrations, which are transmitted through a coupling element to the output piezoelectric crystal that converts them back to electrical energy. This mechanical substitution eliminates electromagnetic interference while maintaining energy transmission capability.
2Power
If transformers are used in strong magnetic fields, then voltage transformation is achieved, but ferromagnetic core saturation occurs
Solution Approach 1:
The patent replaces the electromagnetic transformation mechanism of traditional transformers with a mechanical vibration transmission system. By using piezoelectric crystals that convert electrical energy to mechanical vibrations and back, the system avoids using ferromagnetic cores that would saturate in strong magnetic fields, thereby maintaining operational reliability.
Solution Approach 2:
The patent changes the operating parameters from electromagnetic field-based transformation to mechanical vibration-based transmission. The piezoelectric crystals operate at specific resonance frequencies to optimize energy transmission efficiency, replacing the magnetic field parameter regime with a mechanical vibration parameter regime that is insensitive to external magnetic fields.
3Reliability
If piezo transducers are used for energy transmission, then electromagnetic compatibility is improved, but natural frequency and vibration behavior problems occur
Solution Approach 1:
The patent introduces a coupling element as an intermediary between the input and output piezoelectric crystals. This coupling element facilitates the transmission of mechanical vibrations while allowing for impedance matching and resonance frequency optimization, thereby improving the ease of operation and control of the vibration behavior.
Solution Approach 2:
The patent employs dynamic resonance frequency matching between the input piezoelectric crystal, the coupling element, and the output piezoelectric crystal. By operating at resonant frequencies, the system maximizes energy transmission efficiency and simplifies control, transforming the static vibration behavior into a dynamically optimized system.
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 energy transmission with improved electromagnetic compatibility and reduced material requirements, avoiding the need for magnetic shielding, leading to compact, low-wear designs and flexible energy conversion in harsh environments.
Implementation Method 1
a piezoelectric crystal is supplied with electrical energy (usually an electrical alternating current) so that it changes its size and, in particular, begins to oscillate
Implementation Method 2
the mechanical deformation (vibration) of the first piezoelectric crystal is transferred to the second piezoelectric crystal and leads to the generation of a corresponding electrical voltage
Implementation Method 3
the at least one energy input device is at least partially designed as an electric magnetic field generating device and is designed and set up in such a way that it is at least partially and/or at least works temporarily under the effect of an external magnetic field in such a way that it exerts a Lorentz force on the at least one energy generating device
Data Source
Figure 1a~1b
Figure 2
Figure 3
AI summary
The invention relates to an energy transmitting device (1, 12, 13) comprising an energy input unit (2) and at least an energy generating device (4, 5) which is configured as a piezoelement device. The energy input device (2) is designed and equipped to operate by means of the action of an external magnetic field (3).