Wireless Induction Energy Transfer for Rotating Construction Machinery
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Solution Overview
Problem
Existing construction machines, such as soil compactors, face challenges in efficiently supplying electrical energy to rotating system areas, like compactor rollers, where sensors and transmission units require power but are hindered by energy conversion inefficiencies and voltage fluctuations during rotation.
Innovation Solution
A wireless induction energy transmission system using a transmitter arrangement with resonant circuit coils and capacitors, along with multiple receiver coils arranged circumferentially, ensures reliable and constant power supply by leveraging magnetic induction and resonant frequency tuning to enhance energy transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless energy transmission is implemented in rotating system areas, then energy supply reliability is improved, but energy transmission efficiency deteriorates due to voltage fluctuations during rotation
Solution Approach 1:
The transmitter arrangement is divided into multiple transmitter coils (at least two) arranged one after another in the circumferential direction around the axis of rotation. Similarly, the receiver arrangement includes multiple receiver coils (at least three) arranged in succession in the circumferential direction. This segmentation ensures that at least one receiver coil is always in optimal magnetic coupling with a transmitter coil during rotation, maintaining stable energy transmission efficiency while ensuring continuous power supply to rotating components.
Solution Approach 2:
The transmitter coils and receiver coils are pre-positioned in specific circumferential arrangements before rotation begins. This preliminary positioning ensures that during rotation, the magnetic coupling between transmitter and receiver coils remains optimal at all times, preventing voltage fluctuations and maintaining high energy transmission efficiency from the start of operation.
2Device complexity
If a single transmitter coil and receiver coil are used, then device complexity is reduced, but energy transmission stability deteriorates during rotation
Solution Approach 1:
Instead of using a single transmitter coil and receiver coil, the system employs multiple transmitter coils (at least two) and multiple receiver coils (at least three) arranged circumferentially. This segmentation creates overlapping magnetic coupling zones that maintain stable energy transmission throughout rotation, as at least one receiver coil remains in optimal position with a transmitter coil at all times.
Solution Approach 2:
Multiple transmitter coils and receiver coils are combined in a coordinated circumferential arrangement, working together to provide continuous stable energy transmission. The coils are connected in parallel to consumers of electrical energy, merging their output to deliver stable power that compensates for the dynamic nature of rotation.
3Ease of operation
If wireless energy transmission is used in rotating areas, then ease of operation is improved, but voltage fluctuations increase affecting consumer operation
Solution Approach 1:
The wireless energy transmission system is segmented into multiple transmitter coils and receiver coils arranged circumferentially. This segmentation ensures that voltage output remains stable during rotation by maintaining optimal magnetic coupling at all times, eliminating the voltage fluctuations that would otherwise affect the operation of electrical energy consumers in the rotating system area.
Solution Approach 2:
The system changes the spatial arrangement parameter of the coils from a single pair to multiple coils distributed circumferentially. This parameter change transforms the voltage output characteristic from fluctuating to stable during rotation, while maintaining the wireless energy transmission convenience for operating consumers in the rotating compactor roller.
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 provides a reliable and efficient wireless power supply to rotating components, reducing voltage fluctuations and increasing energy transfer efficiency by up to 45%, ensuring continuous operation of sensors and transmission units during compaction processes.
Implementation Method 1
The present invention uses the effect of magnetic induction in order to transfer energy from a transmitter arrangement which is essentially stationary with respect to a machine frame to a receiver arrangement which is provided on the rotating system area
Implementation Method 2
The efficiency of the induction energy transmission arrangement is significantly increased in that a resonant circuit is provided in association with at least one transmitter coil, the circuit comprising a resonant circuit coil and a resonant circuit capacitor
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a construction machine comprising: a system region, which can be rotated about an axis of rotation relative to a machine frame; at least one consumer (50) of electrical energy on the rotatable system region; and an induction energy-transferring assembly (26) for wirelessly transferring energy into the rotatable system region, wherein the induction energy-transferring assembly (26) comprises a transmitting assembly (27) having at least one transmitting coil (28, 30) and, on the rotatable system region, a receiving assembly (32) having at least one receiving coil (34).