Motor Housing Harness Layout for Resolver and Temperature Sensing
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Solution Overview
Problem
Existing vehicle drive systems face challenges in routing harnesses for temperature sensors and resolvers outside the motor housing without a hollow shaft structure, particularly when the sensors and resolvers are positioned at different locations, making it difficult to adopt a layout where both harnesses pass through the hollow shaft.
Innovation Solution
A vehicle drive system design that integrates the temperature sensor and resolver harnesses within the motor housing, using a coupling part to form a collective harness, which passes through a window in the motor housing and connects to an external connector on a cover member, allowing detection signals to be output without a hollow shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hollow shaft structure is adopted to route harnesses outside the motor housing, then the harness routing is simplified, but the device complexity increases and the manufacturing difficulty increases
Solution Approach 1:
The motor housing is divided into two separate parts: the main housing and the cover member. The window is formed in the housing-side vertical wall part, allowing harnesses to pass through from the interior to the exterior. This segmentation eliminates the need for a complex hollow shaft structure while maintaining simple harness routing capability.
Solution Approach 2:
The function of routing harnesses outside the motor housing is extracted from the main housing body and implemented through a separate cover member with a window. This separates the harness routing function from the structural housing, reducing overall device complexity.
2Measurement precision
If the temperature sensor and resolver are placed at different locations inside the motor housing, then the detection coverage is improved, but the harness layout becomes more difficult
Solution Approach 1:
Multiple separate harnesses (temperature sensor harness and resolver harness) are merged into a single collective harness that exits through a common window in the housing. This consolidation simplifies the layout and routing of multiple harnesses while allowing the sensors to remain at their optimal separate locations for detection coverage.
3Reliability
If the temperature sensor and resolver are placed inside the motor housing, then the protection from external environment is improved, but the harness routing outside the housing becomes more difficult
Solution Approach 1:
The harness routing problem is solved by transitioning from a three-dimensional complex internal routing path to a two-dimensional surface solution. The window in the housing-side vertical wall part provides a direct exit path for harnesses from the protected interior to the exterior, simplifying the routing while maintaining sensor protection.
Data Source
AI summary
A vehicle drive system including a motor, a temperature sensor, and a resolver includes a motor housing accommodating the motor, the temperature sensor, and the resolver, a cover member covering the motor housing from one side in a motor axial direction, and temperature sensor and resolver harnesses connected to the temperature sensor and the resolver, respectively. The temperature sensor harness and the resolver harness are integrally provided inside the motor housing. The motor housing has a window through which a collective harness of the temperature sensor harness and the resolver harness passes. An external connector connectable to an external harness is attached to the cover member to pass through the cover member. The external connector is connected to a tip-end part of the collective harness.