Stator Fluid-Channel Cooling for Motor Winding Heat Dissipation
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Solution Overview
Problem
Existing electric motor cooling methods are insufficient for effectively managing heat generated during operation, which can impact performance and longevity.
Innovation Solution
The electric motor design incorporates a stator body with fluid channels, end caps with pins, and a cooling system that includes a pump and heat exchanger, where fluid flows through the channels to absorb heat from the windings and is then transferred to a heat sink, enhancing heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If typical motor cooling methods are used, then the motor can operate, but heat dissipation is insufficient and performance is compromised
Solution Approach 1:
The stator body is segmented into multiple regions with dedicated fluid channels extending axially through different sections. The cooling system divides heat dissipation into multiple pathways by positioning fluid channels at specific locations (e.g., radially outward from the rotor, between windings) to target different heat-generating zones independently, thereby improving overall heat dissipation efficiency
Solution Approach 2:
A cooling fluid acts as an intermediary medium between the heat-generating windings and the external environment. The fluid channels provide a controlled pathway for this intermediary substance to flow, absorbing heat from the stator body internally and transporting it to external heat exchangers or dissipation points, enabling efficient heat removal without direct thermal contact with ambient air
2Temperature
If cooling fluid channels are added to the stator body, then heat dissipation improves, but device complexity increases
Solution Approach 1:
The cooling fluid channels are merged directly into the stator body structure during manufacturing, eliminating the need for separate external cooling components or complex assembly procedures. The channels are integrated as inherent features of the stator core, combining the structural support function with the thermal management function in a single unified component
Solution Approach 2:
The stator body serves multiple functions simultaneously: it provides structural support for the windings, acts as a magnetic circuit component, and functions as a heat transfer medium through its integrated fluid channels. This multi-functionality reduces the need for additional dedicated cooling components, thereby limiting the increase in device complexity while maintaining improved heat dissipation
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 design improves heat management, maintaining motor performance and longevity by efficiently dissipating heat from the windings through a structured fluid flow and heat transfer mechanism.
Implementation Method 1
fluid flows through the channels to absorb heat from the windings
Implementation Method 2
fluid flows through the channels to absorb heat from the windings and is then transferred to a heat sink
Implementation Method 3
cooling system that includes a pump and heat exchanger, where fluid flows through the channels to absorb heat from the windings and is then transferred to a heat sink
Data Source
AI summary
An electric motor can include a stator body defining fluid channels extending axially for fluid communication between axial ends of the stator body. Conductive windings can form first loops extending axially outward from the first end of the stator body and second loops extending axially outward from the second end of the stator body. A first cap can be coupled to the first end of the stator body and can include a first wall. The first wall can be between the first loops and the channels. Pins can extend from a side of the first wall that is opposite the first loops. The second cap can be coupled to the second end of the stator body and include a second wall. The second wall can be between the second loops and the channels. Pins can extend from a side of the second wall that is opposite the second loops.