Motor Sensor Substrate Layout for Accurate Temperature Sensing
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Solution Overview
Problem
Existing motor designs face challenges in accurately measuring internal temperature due to low adhesion between temperature sensors and coils, leading to measurement errors, and the installation of cap members to shield electromagnetic waves complicates the assembly process and requires additional space.
Innovation Solution
A motor design that incorporates a temperature sensor connected to a power source terminal portion with pad portions and a cap member that passes through a separating space between substrates, simplifying the installation and reducing the number of components, while a housing and flanges provide structural support and secure the cap member's installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is installed on the coil to measure internal temperature, then temperature measurement capability is improved, but adhesion between the sensor and coil is low causing measurement errors and installation complexity increases
Solution Approach 1:
The temperature sensor is integrated into the bus bar structure, merging two previously separate components (temperature sensor and bus bar) into a single unified component. This eliminates the need for separate installation of the temperature sensor on the coil, resolving the adhesion and installation complexity issues while maintaining accurate temperature measurement capability through the sensor's direct contact with the bus bar.
2Object-affected harmful factors
If a cap member is installed around the sensing magnet and sensor to shield electromagnetic waves, then electromagnetic shielding performance is improved, but the number of components increases and assembly process becomes complicated
Solution Approach 1:
The electromagnetic shielding function is integrated into the housing structure, merging the shielding function with the existing housing component. This eliminates the need for a separate cap member, reducing the total number of components and simplifying the assembly process while maintaining effective electromagnetic wave shielding to protect the sensing magnet and sensor.
3Object-affected harmful factors
If a cap member is installed to shield electromagnetic waves, then shielding effectiveness is improved, but installation space requirements increase
Solution Approach 1:
The electromagnetic shielding function is merged into the housing structure, allowing the shielding capability to be achieved within the existing installation space of the motor. This eliminates the need for additional space that would be required for a separate cap member, as the housing itself serves as the shielding structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances the fixing force of the temperature sensor, prevents measurement errors, simplifies the assembly process, reduces the number of components, and secures the cap member's installation space, resulting in improved temperature measurement accuracy and reduced manufacturing costs.
Implementation Method 1
the temperature sensor has a head portion, wires connected to the head portion, and pad portions connected to the temperature sensor
Implementation Method 2
the sensor detects a magnetic force of the sensing magnet
Data Source
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AI summary
The present invention can provide a motor including a shaft, a rotor disposed outside the shaft, a stator disposed outside the rotor, a sensing magnet coupled to the rotor, a circuit substrate disposed above the sensing magnet and including a sensor configured to detect a magnetic flux change due to the sensing magnet, and a cap member which covers the sensor, wherein the circuit substrate includes a first substrate, a second substrate disposed to be spaced apart from the first substrate, and connecting portions connecting the first substrate to the second substrate, the sensor is mounted on the second substrate, and the cap member is disposed to pass through a separating space between the first substrate and the second substrate.