Electric Pump Motor Housing Strut Vibration Damping
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Solution Overview
Problem
Conventional electric pump devices face challenges in suppressing substrate vibration, which affects the durability of solders joining coil end portions and the inverter substrate, leading to inadequate vibration damping performance.
Innovation Solution
The electric pump device incorporates a motor housing portion with strut portions that extend into the inverter housing portion, securely fixing the inverter substrate and enhancing its attachment rigidity, thereby improving vibration damping and solder durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional substrate fixing structure is used, then the device complexity is low, but the vibration damping performance is insufficient
Solution Approach 1:
The motor housing portion is segmented into multiple strut portions that extend into the inverter housing portion. These strut portions are distributed at different positions to provide localized support and vibration damping throughout the substrate fixing structure, rather than using a single monolithic support element.
Solution Approach 2:
The strut portions extend in the axial direction from the motor housing portion into the inverter housing portion, adding a dimensional element to the substrate fixing structure. This axial extension creates multiple support points along the axial axis, enhancing vibration damping without significantly increasing overall structural complexity.
2Reliability
If the inverter substrate is not securely fixed, then the manufacturing precision is easier to achieve, but the solder durability deteriorates
Solution Approach 1:
Different regions of the substrate fixing structure have different functions: the strut portions provide vibration damping and structural support, while the inverter substrate mounting surface provides precise positioning and secure fixation. This local differentiation of quality allows the structure to simultaneously achieve both solder durability through vibration damping and manufacturing precision through dedicated mounting features.
Data Source
AI summary
An electric pump device is provided. The electric pump device includes a motor, an inverter substrate electrically connected to the motor, a housing for housing the motor and the inverter substrate, and a pump portion driven by power of the motor. The housing includes a motor housing portion for housing the motor and an inverter housing portion for housing the inverter substrate. The motor housing portion has strut portions which extend inside the inverter housing portion and fixed to the inverter substrate.