Motor Busbar Passing Portions for Stable Temperature Sensor Mounting

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Solution Overview

Problem

Existing motors face challenges in stably holding temperature sensors on busbars, particularly due to interference fit installation methods which complicate sensor installation and may lead to instability.

Innovation Solution

The temperature sensor is installed on the busbar by passing through multiple notches or passing portions in the busbar, which facilitates stable installation and improves ease of installation, while maintaining electrical conductivity and sensitivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the temperature sensor is installed on the busbar using interference fit, then the sensor can be attached to the busbar, but the installation becomes complicated and the sensor may not be stably held

Engineering Contradiction:

Improvestability of temperature sensor attachmentVSAvoidease of temperature sensor installation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The busbar is divided into multiple segments with passing portions (notches) created at specific locations. The temperature sensor is passed through these segmented notches rather than being attached to a continuous solid busbar surface, enabling stable attachment through multiple discrete contact points while simplifying installation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The temperature sensor is nested through the passing portions of the busbar, with portions of the sensor passing through multiple notches in sequence. This nesting arrangement ensures the sensor is securely held by the busbar structure at multiple locations along its length.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If notches are provided in the busbar to facilitate sensor installation, then the ease of installation improves, but the sectional area of adjacent portions decreases and electrical resistance increases

Engineering Contradiction:

Improveease of temperature sensor installationVSAvoidelectrical conductivity of busbar

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The busbar structure is modified locally at specific positions to create notches for sensor passage, while the majority of the busbar maintains its original solid structure. This localized modification approach allows installation facilitation without significantly impacting overall electrical conductivity.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Multiple notches are provided along the busbar at different positions rather than a single large opening. This partial action approach distributes the structural modification across multiple small locations, maintaining overall electrical performance while achieving the installation objective.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP4589820A1motor

Publication Date: 2025.07.23 TOYOTA JIDOSHA KK

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AI summary

A motor includes: a stator core (10) having a tubular shape; a plurality of coils (20) installed in the stator core (10); a busbar (30) configured to be electrically connected to at least one of the coils (20); and a temperature sensor (40) installed on the busbar (30). The busbar (30) includes a plurality of passing portions. At least part of the temperature sensor (40) passes through each of the passing portions and is installed on the busbar (30).