Saddle-Type Electric Vehicle Motor Cooling via Traveling Wind
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric vehicles with motor cooling configurations, either exposed motor cases or cooling fans, face inefficiencies in cooling performance, especially when motor output increases, leading to overheating and increased power consumption.
Innovation Solution
A saddle-type electric vehicle design incorporating a motor case with inflow and outflow ports for traveling wind to directly cool the motor, with a continuous wind path that includes a battery case for enhanced cooling, and a valve system to control wind flow based on motor output, eliminating the need for a cooling fan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the motor case is exposed outside for cooling, then the motor can be cooled, but the cooling performance is insufficient when motor output increases
Solution Approach 1:
The motor case is divided into distinct functional zones: an exposed external portion for heat dissipation and an internal portion containing the motor components. The case includes specific cooling pathways that segment the flow of air, allowing optimized cooling for different components within the motor assembly.
Solution Approach 2:
A cooling fan is introduced as an intermediary device to actively move air through the motor case. The fan creates controlled airflow patterns that enhance cooling efficiency, particularly when motor output and heat generation increase. The fan acts as a mediator between the external environment and the internal motor components.
2Temperature
If a cooling fan is used to cool the motor, then cooling performance improves, but the number of components increases and power consumption increases
Solution Approach 1:
The cooling fan serves multiple functions: it draws air into the motor case, directs airflow over heated components, and expels hot air from the case. This multi-functional design consolidates several cooling tasks into a single component, reducing the overall number of parts needed while maintaining effective cooling performance.
3Temperature
If a cooling fan is used to cool the motor, then cooling performance improves, but power for driving the cooling fan is needed
Solution Approach 1:
The motor's own operation provides the primary cooling mechanism through the heat it generates. The heat from motor operation creates natural convection currents that draw air through the case. The cooling fan supplements this self-service cooling mechanism, using minimal additional power to enhance rather than completely replace the natural cooling effect.
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 achieves effective motor cooling with a simple setup, enhancing cooling performance as motor output increases, while reducing power consumption and preventing excessive cooling, and integrates the battery and motor cases into the vehicle frame to maintain size and stability.
Implementation Method 1
traveling wind flows in the motor case from the traveling wind inflow port, enters the space where the coil of the motor is arranged, and flows out of the motor case from the traveling wind outflow port, and hence the coil of the motor or the like can be directly cooled
Implementation Method 2
traveling wind during vehicle traveling first flows in the battery case to cool the batteries, and traveling wind exchanging heat with the batteries flows in the motor case to cool the motor
Data Source
AI summary
An electric two-wheeled vehicle includes a motor generating traveling power transmitted to a rear wheel, and a motor case accommodating the motor, wherein the motor case has a traveling wind inflow port allowing traveling wind to flow in the motor case, and a traveling wind outflow port allowing traveling wind flowing in the motor case to flow out, and a space surrounded by the motor case is communicated with a space where a coil of the motor is arranged.