Electromechanical Actuator EMI Filter Layout for Compact Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electromechanical actuators for blackout devices suffer from electromagnetic interference due to improperly positioned inductors and conductors, leading to reduced signal reception and transmission, increased assembly complexity, and high acquisition costs.
Innovation Solution
The electromechanical actuator positions first and second inductors with inclined longitudinal axes relative to the axis of rotation, guided by a support, to improve electromagnetic wave filtering and reduce conductor stress, eliminating the need for a ground connection and minimizing the actuator's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the first and second inductors are mounted freely inside the housing without predetermined arrangement, then the assembly process is simpler, but the electromagnetic waves generated by the electric motor disrupt the operation of other parts of the electromechanical actuator
Solution Approach 1:
The patent positions the inductors at specific inclined angles (first angle α and second angle β) relative to the axis of rotation, moving from a free-mounted 2D arrangement to a precisely oriented 3D configuration. This angular positioning in multiple dimensions optimizes electromagnetic wave filtering while maintaining assembly feasibility through the support structure.
2Reliability
If the first and second inductors are positioned with specific orientation and location inside the housing, then the electromagnetic wave filtering performance is improved, but the electrical conductors connecting the filtering module to the electric motor are subjected to high mechanical stresses and may break
Solution Approach 1:
The patent introduces a support structure as an intermediary element between the inductors and the housing. This support serves multiple functions: it positions the inductors at the optimal inclined angles for electromagnetic filtering, provides mechanical reinforcement to reduce stress on electrical conductors, and guides conductor routing to prevent breakage. The support acts as a mediator that resolves the conflict between filtering performance and conductor durability.
3Reliability
If the first and second inductors are positioned with specific orientation inside the housing, then the electromagnetic wave filtering is improved, but the assembly complexity increases due to bent conductors with significant curvature
Solution Approach 1:
The support structure serves as a mediator that simplifies assembly by providing pre-defined conductor routing paths. The support includes guiding elements that channel electrical conductors along optimized trajectories, reducing the need for complex manual bending and positioning during assembly. This intermediary structure transforms a complex free-form routing problem into a guided assembly process.
4Reliability
If a ground connection between the filter module and the housing is added to dissipate electromagnetic interference, then the electromagnetic wave filtering is improved, but the acquisition cost increases
Solution Approach 1:
The support structure is designed to provide inherent electromagnetic interference dissipation capabilities through its material properties and geometric configuration. By selecting appropriate materials and designing the support's shape, it naturally grounds and dissipates electromagnetic interference without requiring additional separate ground connection components. This self-service approach integrates EMI dissipation into the existing support structure, avoiding extra costs.
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 enhances electromagnetic wave filtering performance, simplifies assembly, reduces conductor breakage risk, and lowers production costs while maintaining compact dimensions.
Implementation Method 1
the filtering module only allows the absorption of a small part of the electromagnetic waves transmitted by the electrical conductors electrically connecting the filtering module to the electric motor
Implementation Method 2
The first and second inductances being mounted on the support, the first and second longitudinal axes of the first and second inductances extending respectively in a first plane and in a second plane, the first and second planes being parallel to an axis of rotation
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An actuator (11) comprises a tubular housing, a motor (16), a control unit (15), and an electromagnetic wave filtering module (22), housed within the housing (17) and arranged along a direction defined by an axis of rotation (X) of the actuator (11). The filtering module (22) comprises a first inductor (41), extending along a direction defined by a first longitudinal axis (L1), a second inductor (42), extending along a direction defined by a second longitudinal axis (L2), and a support (48) on which the inductors (41, 42) are mounted. The first and second axes (L1, L2) extend respectively in a first plane and a second plane, parallel to the axis of rotation (X). In the first plane, the first axis (L1) is inclined with respect to the axis of rotation (X) by a first non-zero inclination value (α1) of positive sign.Furthermore, in the second plane, the second axis (L2) is inclined relative to the axis of rotation (X) by a second non-zero, negative angle (α2). The first and second angles (α1, α2) have the same absolute value, within a range of 30° to 60°.