Inverter-Integrated Motor Cooling Layout for Compact IGBT Modules
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing IGBT power module packages for hybrid electric vehicles face challenges in miniaturization and heat dissipation, leading to increased package size and limited material size, which hinders the development of high heat dissipation and efficient power conversion.
Innovation Solution
An inverter-integrated motor apparatus with a simplified structure that combines a power module, a cooling device, and a capacitor, utilizing water cooling to enhance cooling performance, where a cooling medium circulates through a motor housing and is shared with a cooling device, and a power module is positioned between main and sub-portions to facilitate double-sided cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a large-sized heat dissipation plate and vertical heat dissipation structure are used, then heat dissipation performance is improved, but package size increases
Solution Approach 1:
The patent transitions from single-direction vertical heat dissipation to multi-directional heat dissipation by positioning cooling devices on both the upper and lower surfaces of the power module. This dimensional change allows heat to be dissipated in multiple directions simultaneously, improving cooling efficiency without increasing package size
Solution Approach 2:
The patent introduces a liquid cooling system where a cooling medium circulates through cooling channels formed in the upper and lower heat dissipation plates. This hydraulic cooling method provides superior heat dissipation performance compared to traditional air cooling, enabling effective cooling in a compact package
2Temperature
If material size is increased to improve heat dissipation, then cooling performance is enhanced, but device complexity and space requirements increase
Solution Approach 1:
The patent integrates the cooling medium circulation path to connect both upper and lower cooling devices into a unified system. The cooling medium flows sequentially through the lower cooling device, intermediate heat dissipation plate, and upper cooling device, merging multiple cooling functions into a single integrated circuit that enhances cooling performance without proportionally increasing complexity
Solution Approach 2:
The intermediate heat dissipation plate serves multiple functions: it acts as a structural support between upper and lower modules, provides an additional heat dissipation surface, and serves as a thermal bridge for heat transfer between the power module and cooling system. This multi-functionality reduces the need for separate components
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
The solution enables improved cooling performance and miniaturization of the IGBT power module package, enhancing heat dissipation and reducing package size while maintaining output performance for hybrid electric vehicles.
Implementation Method 1
the invert-integrated motor apparatus being capable of securing the cooling performance through water cooling
Implementation Method 2
a cooling device combined with a flank surface of each of the main portions and a flank surface of the sub-portion, the cooling medium in the motor housing being shared with the cooling device and circulating through the cooling device
Data Source
AI summary
An inverter-integrated motor apparatus employing a simplified structure that connects an inverter assembly into which a power module, a cooling device, and a capacitor are integrally combined and a motor assembly, is configured for securing the cooling performance through water cooling.