Ventricular Assist Device Motor Axial Thickness Reduction
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Solution Overview
Problem
Conventional ventricular assist devices have a large thickness due to the arrangement of sensing and control circuit boards adjacent to the stator assembly, increasing the risk of contact with thoracic organs and compromising safety during implantation.
Innovation Solution
The control circuit board is positioned on the peripheral side of the stator assembly, reducing the axial thickness of the motor and ventricular assist device, while the sensing circuit board is placed to optimize space utilization and maintain detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensing circuit board and control circuit board are arranged adjacent to the stator assembly, then the motor can accommodate all necessary components, but the axial thickness increases and the risk of contact with thoracic organs increases
Solution Approach 1:
The control circuit board is repositioned from an axial arrangement (adjacent to the stator assembly) to a radial arrangement (at the peripheral side of the stator assembly). This dimensional change allows all components to be accommodated within the same axial space, reducing the motor's axial thickness and thereby reducing the risk of contact with thoracic organs during implantation.
2Length of stationary object
If the control circuit board is positioned on the peripheral side of the stator assembly, then the axial thickness is reduced, but the space arrangement becomes more complex
Solution Approach 1:
The control circuit board and sensing circuit board are both integrated into the accommodating cavity of the housing, with the control circuit board positioned at the peripheral side and the sensing circuit board positioned to extend through the stator assembly. This merging of component locations within a unified spatial framework simplifies the overall space arrangement while achieving reduced axial thickness.
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 minimizes the risk of contact with thoracic organs, enhancing the safety and efficiency of the ventricular assist device by reducing its overall thickness and improving heat dissipation.
Implementation Method 1
a stator assembly extending through the sensing circuit board
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
An electric motor (11) and a ventricular assist device (10). The electric motor (11) comprises a housing (200), a sensing assembly (300), a stator assembly (400) and a control assembly (500), wherein an accommodating cavity (210) is formed by means of enclosure of the housing (200); the sensing assembly (300) comprises a sensing circuit board (310), which is accommodated in the accommodating cavity (210); the stator assembly (400) penetrates the sensing circuit board (310); and the control assembly (500) comprises a control circuit board (520) electrically connected to the sensing circuit board (310), wherein the control circuit board (520) is accommodated in the accommodating cavity (210) and is arranged at the peripheral side of the stator assembly (400), such that the control circuit board (520) does not occupy a space of the electric motor (11) in an axial direction, thereby improving the safety performance of the ventricular assist device (10).