Rotating Machine Connector with Integrated Capacitor for High-Frequency Noise
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Solution Overview
Problem
Conventional rotating electric machines struggle to effectively reduce high-frequency electromagnetic noise, which can cause interference to peripheral equipment due to limitations in noise cancellation mechanisms, especially for frequencies above hundreds of MHz.
Innovation Solution
The rotating electric machine incorporates a capacitor formed by an insulation layer contacting the outer peripheral surfaces of power-supply members and a conductive layer contacting the insulation layer, which is electrically connected to the accommodation body, enhancing noise reduction by increasing capacitance and restricting noise propagation without the need for additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional noise cancelling elements (capacitor or choke coil) are provided in the electric circuit, then noise having a frequency lower than or equal to hundreds of MHz can be eliminated, but high-frequency noise (above hundreds of MHz) cannot be effectively reduced
Solution Approach 1:
The patent changes the physical parameters of the power supply members by providing insulating layers and conductive layers thereon, transforming them into capacitor structures. This parameter change enables the power supply members themselves to function as high-frequency noise filters, extending the noise elimination capability to frequencies above hundreds of MHz without adding separate noise cancelling elements.
Solution Approach 2:
The patent makes the power supply members multi-functional by enabling them to serve both as electrical connection components and as high-frequency noise filtering components. The insulating layer and conductive layer on the power supply members create capacitor structures that provide electromagnetic noise reduction across a broad frequency range, including high frequencies, thereby eliminating the need for dedicated noise cancelling elements.
2Object-affected harmful factors
If additional noise cancelling components are added to reduce high-frequency noise, then noise reduction effectiveness improves, but device complexity and space requirements increase
Solution Approach 1:
The patent merges the noise cancelling function with the existing power supply members by forming capacitor structures directly on them. The insulating layer and conductive layer are integrated into the power supply member structure, creating a combined component that performs both electrical connection and high-frequency noise filtering functions, thereby avoiding the need for additional separate components.
Solution Approach 2:
The power supply members serve themselves by providing the insulating and conductive layers that form capacitor structures. This self-service approach enables the power supply members to actively filter high-frequency noise without requiring external noise cancelling components, simplifying the overall device structure while maintaining effective noise reduction.
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 effectively reduces high-frequency noise within a wide frequency range, particularly from 142 to 1494 MHz, while maintaining a compact design and reducing manufacturing costs by utilizing existing components.
Implementation Method 1
the insulation layer contacting the outer peripheral surface of each power-supply member and the conductive layer contacting the insulation layer work together to provide a capacitor, and the capacitor is capable of reducing high-frequency noise
Data Source
AI summary
A rotating electric machine includes a rotation body driven to rotate, an accommodation body housing the rotation body, a first power-supply member electrically connected to a positive electrode of a power source, a second power-supply member electrically connected to a negative electrode of the power source, an insulation layer contacting outer peripheral surfaces of the first and second power-supply members, and a conductive layer contacting the insulation layer on an opposite side of the insulation layer from the outer peripheral surfaces of the first and second power-supply members. The conductive layer is electrically connected to the accommodation body.