Side-Coil Wireless Power Transfer for Moving Factory Mobile Bodies
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Solution Overview
Problem
Existing contactless power supply systems for mobile bodies in factories and warehouses require the mobile bodies to stop near power transmission apparatuses, affecting conveyance efficiency and necessitating additional space for power transfer, which hinders efficient operation and space utilization.
Innovation Solution
A contactless power supply system that allows power transmission to mobile bodies in both stopped and moving states, with power reception coils on the side surfaces of the mobile bodies, enabling power transfer without the need for additional space or underground installations, and using power transmission apparatuses positioned along the movement path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the mobile body stops near the power transmission apparatus for contactless power supply, then power can be supplied to the mobile body, but conveyance efficiency deteriorates and additional space is required
Solution Approach 1:
The power supply system enables continuous power transmission to the mobile body during its movement along the movement path, eliminating the need for stopping to charge. The power transmission apparatus transmits power wirelessly while the mobile body passes through the movement path, maintaining continuous operational capability without interrupting the conveyance workflow.
Solution Approach 2:
The power transmission apparatus is positioned at a location adjacent to the movement path, allowing power transmission in a direction perpendicular to the movement direction. This spatial arrangement enables power supply without requiring the mobile body to deviate from its conveyance path or stop, resolving the conflict between power supply and conveyance efficiency.
2Use of energy by moving object
If the mobile body stops near the power transmission apparatus for contactless power supply, then power can be supplied to the mobile body, but additional space for power transfer is required
Solution Approach 1:
The power transmission apparatus is positioned at a location adjacent to the movement path, allowing power transmission in a direction perpendicular to the movement direction. This spatial arrangement enables power supply without requiring the mobile body to deviate from its conveyance path or stop, resolving the conflict between power supply and conveyance efficiency.
3Use of energy by moving object
If the power transmission apparatus is positioned outside the movement path, then contactless power supply can be achieved, but conveyance efficiency deteriorates
Solution Approach 1:
The power transmission apparatus is positioned at a location adjacent to the movement path, allowing power transmission in a direction perpendicular to the movement direction. This spatial arrangement enables power supply without requiring the mobile body to deviate from its conveyance path or stop, resolving the conflict between power supply and conveyance efficiency.
4Use of energy by moving object
If the power transmission apparatus is disposed underground or under the floor, then power can be supplied to the mobile body, but system construction becomes more difficult
Solution Approach 1:
The power transmission apparatus is extracted from the underground or floor structure and positioned as a separate apparatus adjacent to the movement path. This eliminates the need for complex underground installations or floor modifications, significantly simplifying system construction while maintaining wireless power supply capability.
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
Improves conveyance efficiency by allowing power transfer during movement, reduces space requirements, and facilitates easier system construction by eliminating the need for underground installations.
Implementation Method 1
a power transmission apparatus that is capable of supplying power to the power reception apparatus without contact
Implementation Method 2
the power reception apparatus includes a power reception coil that is provided on at least a side surface side of the mobile body
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A contactless power supply system (1, 1a to 1i) includes: a mobile body (30, 31a to 31d, 32a, to 32d, 33 to 35) that includes a power reception apparatus (310), and transfers a work object from a first work site (WA1) to a second work site (WA2); and a power transmission apparatus (21 to 25) that is capable of supplying power to the power reception apparatus without contact in a state in which the mobile body is stopped at at least a scheduled stop position (Ar11, Ar13, Ar22 to Ar25, Ar27, Ar32, Ar201, Ar41, Ar202, Ar51, Ar52, Ar61 to Ar64, Ta1 to Tg1, Ta2, Tc2, Te2, Tg2, Th3, Tj3, T13, Ar23a) at which the mobile body is scheduled to stop within a movement path of the mobile body between the first work site and the second work site, or the mobile body is moving. The power reception apparatus includes at least a power reception coil (311) provided on a side surface side of the mobile body.