Electric Propulsion Cooling Layout With Series Motor-Inverter Jackets
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Solution Overview
Problem
Existing electric propulsion devices face challenges in efficiently cooling multiple components such as motors and inverters while maintaining a simple structural design, as complex cooling water supply and discharge passages complicate the device's structure.
Innovation Solution
The electric propulsion device integrates a cooling system where the motor and inverter water jackets are connected in series between an intake and drain port, allowing cooling water to sequentially cool both components without additional branching passages, simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate cooling passages are provided for motor and inverter, then cooling effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent combines the motor cooling passage and inverter cooling passage into a single integrated cooling water supply passage that sequentially cools both components. This merging approach maintains effective cooling of both heat-generating components while eliminating the need for separate independent cooling systems, thereby reducing structural complexity and the number of passages required.
2Reliability
If multiple cooling water supply passages are provided, then cooling performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple cooling water supply passages into a single integrated passage that serves both the motor and inverter. This single passage design simplifies the manufacturing process by reducing the number of components that need to be fabricated and assembled, while still delivering adequate cooling performance to both heat-generating components through sequential cooling.
3Reliability
If complex cooling water supply and discharge passages are used, then cooling efficiency is improved, but device complexity increases
Solution Approach 1:
The patent combines the cooling water supply and discharge functions into a simplified single-passge system that sequentially flows through both the motor and inverter before discharge. This integrated approach maintains cooling efficiency by ensuring both components receive adequate cooling water flow while dramatically reducing the structural complexity of the passage system compared to separate supply and discharge passages for each component.
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 enables efficient cooling of both the motor and inverter with a simplified structure, reducing complexity and enhancing thermal management.
Implementation Method 1
a motor water jacket configured to cool the motor with cooling water taken into the electric propulsion device, and an inverter water jacket configured to cool the inverter with cooling water taken into the electric propulsion device
Data Source
AI summary
An electric propulsion device includes a propeller, a motor rotating the propeller, an inverter controlling driving of the motor, and a cooling device cooling the motor and the inverter. The cooling device includes an intake port taking water around the electric propulsion device into the electric propulsion device as cooling water, a drain port discharging the cooling water taken into the electric propulsion device to around the electric propulsion device, a pump flowing the cooling water from the intake port to the drain port in the electric propulsion device, a motor water jacket cooling the motor with cooling water taken into the electric propulsion device, and an inverter water jacket cooling the inverter with cooling water taken into the electric propulsion device. The motor water jacket and the inverter water jacket are connected in series between the intake port and the drain port in the electric propulsion device.