Modular EMC Filter Architecture for Inverter Noise Suppression
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Solution Overview
Problem
Existing passive EMC filters for inverter circuit boards require large installation space and are costly to adapt to varying EMC specifications and installation constraints, leading to increased development and production expenses.
Innovation Solution
The implementation of a modular EMC filter architecture using separate mounting boards with common or differential mode chokes and capacitors, allowing for a compact, space-saving design that can be easily connected to the main board and adapted to meet different EMC requirements without altering the main board layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional passive EMC filter is used, then interference suppression is achieved, but installation space increases and adaptation costs increase
Solution Approach 1:
The EMC filter is divided into modular components that can be independently mounted on the circuit board. Each module contains specific filter elements (capacitors, chokes) that can be separately positioned and configured, reducing the overall space required while maintaining filtering effectiveness.
Solution Approach 2:
The filter components are arranged in a three-dimensional configuration on the circuit board, utilizing vertical space and layered mounting techniques. This allows the filter to achieve the required suppression performance without proportionally increasing the planar installation area.
2Object-affected harmful factors
If a conventional passive EMC filter is used, then interference suppression is achieved, but development and production expenses increase
Solution Approach 1:
The filter design is segmented into standardized modules that can be reused across different inverter models. This modularity reduces development costs by eliminating the need to design complete filter systems for each new product and simplifies production through standardized manufacturing processes.
Solution Approach 2:
The EMC filter modules are designed with universal mounting configurations and standardized component values that can be adapted to multiple inverter types and power ratings. This universality reduces both development expenses (reusable designs) and production costs (standardized components and assembly procedures).
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 solution reduces the need for extensive reworking of inverter circuit boards, minimizes space requirements, and allows for cost-effective adaptation to various EMC specifications, thereby reducing development and production expenditures while maintaining effective interference suppression.
Implementation Method 1
at least one choke (4, 5), which has a first winding (16a) and a second winding (16b)
Implementation Method 2
several capacitors (6, 7, 8, 9), wherein at least one capacitor (6, 7) is disposed between the first line (HV+) and the second line (HV−)
Data Source
AI summary
The invention which relates to an EMC filter for the suppression of interference signals addresses the problem of specifying a solution with which reworking expenditures of an inverter board are reduced and, additionally, installation space restriction as well as reduction of development and production costs are attained. This problem is resolved thereby that in an EMC filter module at least one core of a choke with a winding is disposed on a first mounting board, that at least one of the capacitors is disposed on the first mounting board, that the first mounting board comprises at least two contact means and that the first mounting board of the EMC filter module is disposed with its contact means on a main board of an inverter and is electrically connected thereto.