Outer-Rotor DC Output Unit Dual-Intake Cooling Layout
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Solution Overview
Problem
The existing outer-rotor-type-engine-driven-DC-output units face challenges in enhancing the cooling capability of both the inner stator of the outer-rotor-type-electric generator and the DC-output-power converter while maintaining a compact size, as the increased output leads to higher heat generation and requires effective cooling mechanisms.
Innovation Solution
The integration of a dual intake system within the unit, where air flows around the inner stator and DC-output-power converter, with specific intake ports and fan configurations, allows for efficient cooling of both components without increasing the unit's size, utilizing a first intake system for the inner stator and a second intake system for the DC-output-power converter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the output of the outer-rotor-type-electric generator is increased, then the power generation capability is improved, but the heat generation of the inner stator increases requiring enhanced cooling
Solution Approach 1:
The cooling mechanism is divided into two separate intake systems: a first intake system that draws air through the inner stator to cool it, and a second intake system that draws air directly to cool the DC-output-power converter. This segmentation allows independent optimization of cooling for each component without interference.
Solution Approach 2:
The patent introduces a dual-path cooling architecture that adds a dimensional aspect to the cooling system by creating parallel airflow paths (through the stator and bypassing it) rather than using a single linear cooling path. This enables simultaneous cooling of both the inner stator and DC-output-power converter with optimized airflow distribution.
2Power
If the output of the DC-output-power converter is increased, then the DC power conversion capability is improved, but the heat generation of the DC-output-power converter increases requiring enhanced cooling
Solution Approach 1:
The cooling mechanism is divided into two separate intake systems: a first intake system that draws air through the inner stator to cool it, and a second intake system that draws air directly to cool the DC-output-power converter. This segmentation allows independent optimization of cooling for each component without interference.
Solution Approach 2:
The fan serves as an intermediary device that generates airflow for both cooling systems. By positioning the fan to serve both the first and second intake systems, it efficiently distributes cooled air to both the inner stator and DC-output-power converter, acting as a mediator in the thermal management process.
3Temperature
If a cooling mechanism is added to cool both the inner stator and DC-output-power converter, then the cooling capability is improved, but the size of the unit increases
Solution Approach 1:
The fan is designed to serve dual purposes: it drives airflow for both the first intake system (cooling the inner stator) and the second intake system (cooling the DC-output-power converter). This multi-functionality eliminates the need for separate fans for each cooling system, reducing overall unit size while maintaining comprehensive cooling capability.
Solution Approach 2:
The patent merges the cooling functions for the inner stator and DC-output-power converter into a single integrated cooling mechanism with a shared fan and coordinated airflow paths. This consolidation achieves effective dual-component cooling without the space requirements of completely separate cooling systems.
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 enhances the cooling capability of both the inner stator and the DC-output-power converter, allowing for increased design flexibility and stable temperature management, thereby addressing the need for compact and efficient cooling in the outer-rotor-type-engine-driven-DC-output units.
Implementation Method 1
a fan configured to cool the outer-rotor-type-electric generator and the DC-output-power converter... first air drawn in by the fan through a first intake port passes around the inner stator of the outer-rotor-type-electric generator
Implementation Method 2
second air drawn in by the fan through a second intake port passes through the fan and then passes around the chassis of the DC-output-power converter
Implementation Method 3
the inner stator is cooled by the first air before passing around the chassis of the DC-output-power converter
Implementation Method 4
the DC-output-power converter is cooled by both the first air in the first intake system after cooling the inner stator, and the second air in the second intake system
Data Source
AI summary
An DC output unit, having: an engine; a generator including an inner stator and an outer rotor; a converter converting electric power generated by the generator to DC power; a fan cooling the generator and the converter; and a cooling mechanism. The cooling mechanism includes a first intake system in which air drawn in through a first intake port passes subsequently by the inner stator of the generator, the fan, and a chassis of the converter, and a second intake system in which second air drawn in through a second intake port subsequently passes by the fan and then by the chassis without passing by the inner stator. The cooling mechanism is configured such that the first intake port, the inner stator, the fan, and the second intake port are arranged, in this order, in an axial direction of a rotation axis of the generator.