Throttle Motor Bracket Filter Layout for Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The demand for smaller valve devices and motors has resulted in insufficient space for an inductor with sufficient capacity inside the motor, leading to increased noise levels.
Innovation Solution
An electronically controlled throttle device is designed with a filter circuit comprising an inductor, capacitor, and resistor connected to a pigtail on a bracket, where the filter circuit is positioned outside the motor, increasing inductance and reducing noise effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the motor size is reduced to meet the demand for smaller valve devices, then the device size is reduced, but the inductor capacity becomes insufficient leading to increased noise
Solution Approach 1:
The inductor is extracted from the motor interior and mounted on the bracket instead. This allows the motor to be reduced in size while the inductor maintains its sufficient capacity for noise reduction. The inductor is taken out of the constrained motor space and placed in the more spacious bracket area, resolving the contradiction between motor size reduction and noise control.
Solution Approach 2:
The inductor mounting location is changed from the three-dimensional interior space of the motor to the two-dimensional surface of the bracket. This dimensional transition provides sufficient space for a larger inductor without increasing the motor volume, thereby reducing noise while maintaining compact motor dimensions.
2Object-generated harmful factors
If a larger inductor is used to reduce noise, then noise reduction is enhanced, but the motor size increases
Solution Approach 1:
The inductor is extracted from the motor interior and mounted on the bracket instead. This allows the motor to be reduced in size while the inductor maintains its sufficient capacity for noise reduction. The inductor is taken out of the constrained motor space and placed in the more spacious bracket area, resolving the contradiction between motor size reduction and noise control.
Solution Approach 2:
The inductor mounting location is changed from the three-dimensional interior space of the motor to the two-dimensional surface of the bracket. This dimensional transition provides sufficient space for a larger inductor without increasing the motor volume, thereby reducing noise while maintaining compact motor dimensions.
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
This configuration reduces the size of the motor while significantly enhancing noise reduction, allowing for a larger inductor to be mounted outside the motor, effectively addressing the space constraints and noise issues.
Implementation Method 1
The inductor is configured to reduce fluctuation of current per unit time by using inductance, so as to reduce radiation noise
Implementation Method 2
a filter circuit connected electrically to the pigtail, and configured to reduce a noise of the motor
Data Source
AI summary
Provided is an electronically controlled throttle device configured to reduce size of a motor and concurrently to enhance reduction of a noise of the motor. The electronically controlled throttle device includes: a body including a throttle valve; a motor provided with a brush, the motor configured to drive the throttle valve; a bracket (20F) configured to attach the motor to the body; a pigtail connected electrically to the brush, and arranged on a surface of the bracket (20F), the surface facing the motor; and a filter circuit (an inductor (31), a capacitor (32), and a resistor (33)) connected electrically to the pigtail and configured to reduce the noise of the motor. The filter circuit is arranged on a surface of the bracket (20F), the surface opposite the motor.