Motor-Pump Wire Harness Layout With Branched Power Supply
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Solution Overview
Problem
Conventional motor assemblies for hybrid and electric vehicles require multiple wire harnesses and connectors, increasing the complexity and number of parts, which complicates the assembly process.
Innovation Solution
A motor assembly design that integrates an electric pump, an inverter assembly, and a dual wire harness system, where the first wire harness connects an external power supply to the inverter assembly with a branched low-voltage power line for the controller and pump, and the second wire harness connects the electric pump to the inverter assembly with a pump power supply line and signal line, reducing the number of connectors and simplifying the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate wire harnesses are used to connect power supply and signal lines to the electric pump, then the electrical connections are established, but the number of parts increases and the assembly process becomes complicated
Solution Approach 1:
The patent combines the power supply line and signal line into a single integrated wire harness that connects both the controller and electric pump. This merging of previously separate wiring paths reduces the number of connectors and simplifies the overall assembly while maintaining all necessary electrical connections for reliable operation
2Reliability
If two connectors are used to electrically connect the wire harnesses to the electric pump, then the electrical connections are established, but the number of parts increases
Solution Approach 1:
The patent consolidates multiple connector functions into a single integrated connector assembly. The wire harness is designed with combined connection points that establish both power supply and signal connections to the electric pump through one unified interface, thereby reducing the total number of connectors from two to one
3Ease of manufacture
If separate power supply lines are used for the controller and electric pump, then the power distribution is clear, but the wire harness configuration becomes complex
Solution Approach 1:
The wire harness incorporates an internal branch point that segments the power supply path into distinct routes for the controller and electric pump. This segmentation is integrated within the harness structure itself, maintaining clear power distribution functionality while avoiding the complexity of separate external wiring paths
Data Source
AI summary
A motor assembly includes a motor, an electric pump to supply oil to the motor, an inverter assembly connected to the motor, and a first wire harness and a second wire harness. The inverter assembly includes an inverter to convert a high-voltage direct current into an alternating current and supply the alternating current to the motor, and a controller to control the inverter and the electric pump. The first wire harness electrically connects an external power supply and the inverter assembly, and passes a low-voltage power supply line. The low-voltage power supply line is, at a branch point, branched into a controller power supply line to supply drive power to the controller and a pump power supply line to supply drive power to the electric pump.