Linear Motor Thermal Management via Spatial Redistribution
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Solution Overview
Problem
Conventional electric propulsion devices face challenges in reducing size due to the need to prevent electricity storage devices from reaching high temperatures, as common batteries have specified operating temperatures of 50° C or less.
Innovation Solution
A linear motor design where the electricity storage device is arranged adjacent to a mounted body with a high thermal conductivity heat sink, and the circuit section and armatures are positioned to minimize heat transfer, allowing for efficient cooling and temperature regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the electricity storage device is brought close to the motor and power converter to reduce size, then the device size is reduced, but the electricity storage device reaches high temperatures exceeding its operating limit of 50°C
Solution Approach 1:
The patent repositions the electricity storage device from a conventional centralized location to the end portion of the movable body in the longitudinal direction. This spatial redistribution in one dimension (longitudinal positioning) allows the device to be placed in a thermally favorable zone away from heat-generating components, resolving the contradiction between compact size and temperature control.
Solution Approach 2:
The patent creates a localized thermal environment at the end portion of the movable body where the electricity storage device is positioned. By concentrating cooling resources and thermal isolation measures at this specific location, the system maintains appropriate temperature conditions for the battery while allowing other areas to operate at higher temperatures, thus enabling overall size reduction without compromising battery thermal requirements.
2Temperature
If the electricity storage device is positioned away from heat-generating components to maintain low temperature, then temperature control is improved, but the device size increases
Solution Approach 1:
The patent utilizes the longitudinal dimension of the movable body to position the electricity storage device at the end portion, effectively using available space in the thermal gradient direction. This dimensional approach allows thermal separation without requiring additional lateral space, thereby maintaining compact overall device dimensions while achieving proper temperature management.
Solution Approach 2:
The patent introduces thermal isolation measures and cooling structures as intermediary elements between the electricity storage device and heat-generating components. These intermediaries enable the battery to be positioned closer to other components while maintaining appropriate temperature separation, thus reducing overall device size without compromising thermal management.
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 effectively prevents the electricity storage device from reaching high temperatures, enabling a reduction in the size of the linear motor while maintaining effective cooling and heat management.
Implementation Method 1
an electricity storage device having a low heat resistance temperature is arranged adjacent to a mounted body
Data Source
AI summary
This invention is concerning a linear motor, in which a movable body includes an electricity storage device, a circuit section constituted by an inverter and a control circuit and converting and outputting power supplied from the electricity storage device, and a plurality of armatures, the magnetic fields of which vary in accordance with the power output from the circuit section, and which are arranged so as to be separated from a stator core via a gap. Further, when only the mounted body, the electricity storage device, the circuit section, and the armatures are viewed, the electricity storage device is arranged adjacent to the mounted body.