Motor Driving Device Connector Integration
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Solution Overview
Problem
Conventional motor-driving devices require manual connection of the cooling fan and substrate, leading to increased manufacturing time and product costs, and are prone to cable damage due to heat from the circuit module.
Innovation Solution
The motor-driving device features an automatic connection mechanism between the cooling fan and substrate using a connector system with male and female connectors, electrical wires, and a substrate fixing pin, which simplifies assembly and reduces the risk of short-circuiting by fixing the connection part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual connection of cable and circuit module is used, then connection flexibility is maintained, but manufacturing time increases and product cost increases
Solution Approach 1:
The patent merges the cable connection structure directly into the circuit module housing. The cable is fixed to the housing at a predetermined position, eliminating the need for separate manual connection steps. This integration reduces manufacturing time while maintaining connection functionality.
Solution Approach 2:
The cable is pre-connected and fixed to the circuit module housing before final assembly. This preliminary action ensures the cable is already in position and secured, eliminating time-consuming manual connection operations during manufacturing while maintaining connection flexibility.
2Reliability
If cable is moved inside motor-driving device, then connection flexibility is maintained, but cable sheath may melt or short-circuit occurs due to heat
Solution Approach 1:
The patent extracts the cable from the internal space near heat-generating components and routes it through a dedicated cable groove in the housing. This separation removes the cable from the harmful thermal environment while maintaining its electrical connection function.
Solution Approach 2:
The cable groove acts as an intermediary structure that provides a protected pathway for the cable. This groove isolates the cable from direct heat exposure from power semiconductor modules while still allowing necessary electrical connections to be made.
3Productivity
If automatic connection mechanism is implemented, then manufacturing time is reduced, but connector structure complexity increases
Solution Approach 1:
The patent combines the connector functionality directly into the housing structure. The connector is formed as an integrated part of the housing at a predetermined position, allowing automatic connection during assembly while avoiding separate complex connector components.
Solution Approach 2:
The housing serves multiple functions: it encloses the circuit module, provides structural support, and integrates the connector functionality. This multi-functionality reduces the need for separate connector components while enabling automatic connection mechanisms.
Data Source
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AI summary
A motor-driving device for varying power supplied from an external power source and supplying the varied power to a motor includes a lower base; a middle base disposed above the lower base; a cooling fan disposed between the lower base and the middle base; a connector disposed on the middle base, where the connector is electrically connected to the cooling fan; and a substrate disposed above the middle base, wherein the connector is disposed between the substrate and the middle base, wherein the connector is electrically connected to the substrate.