Exciter Circuit Module Integration for Low-EMI Machine Drives
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Solution Overview
Problem
Existing electrical circuit devices for externally excited electrical machines face challenges in integrating the exciter circuit module efficiently, leading to issues such as increased electromagnetic interference, stray inductances, and higher production costs due to the use of cables and complex filtering measures.
Innovation Solution
The exciter circuit module is directly connected to the capacitor via a terminal, eliminating intermediate cables and allowing for a robust, low-inductance connection, which reduces electromagnetic interference and simplifies assembly, thereby enhancing efficiency and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the exciter circuit module is connected to the capacitor via intermediate cables, then the electrical connections can be flexible and easy to implement, but electromagnetic interference increases and stray inductances increase
Solution Approach 1:
The patent merges the exciter circuit module with the capacitor housing by integrating the exciter circuit module directly into the capacitor structure. This eliminates intermediate cables and connections, thereby reducing electromagnetic interference and stray inductances while maintaining ease of manufacture through a unified integrated design.
2Ease of manufacture
If the exciter circuit module is connected to the capacitor via intermediate cables, then the assembly process can be simple, but production costs increase due to complex filtering measures
Solution Approach 1:
By integrating the exciter circuit module directly into the capacitor housing, the patent eliminates the need for separate filtering components and complex filtering measures. The unified structure inherently reduces electromagnetic interference without requiring additional filtering complexity, thereby lowering production costs while maintaining assembly simplicity.
3Object-affected harmful factors
If the exciter circuit module is integrated directly into the capacitor housing, then electromagnetic interference is reduced and stray inductances are minimized, but the integration complexity increases
Solution Approach 1:
The patent resolves the integration complexity by designing the exciter circuit module to be directly integrated into the capacitor housing as a unified structure. This merging approach minimizes electromagnetic interference and stray inductances through close physical integration while managing complexity through a standardized integrated design that combines both components into a single manufacturable unit.
4Ease of manufacture
If cables are used to connect the exciter circuit module to the capacitor, then the electrical connections can be established easily, but the service life is reduced due to higher production costs and electromagnetic interference
Solution Approach 1:
The patent integrates the exciter circuit module directly into the capacitor housing, eliminating cables and intermediate connections. This unified integrated structure reduces electromagnetic interference and stray inductances, thereby improving reliability and extending service life while maintaining ease of manufacture through a streamlined single-unit design that requires no separate connection steps.
Data Source
AI summary
An electrical circuit device for operating an externally excited electrical machine includes an exciter circuit, an inverter circuit, a capacitor, and a support structure. The exciter circuit includes at least one exciter circuit module arranged on a first side surface of the support structure. The at least one exciter circuit module includes at least one direct current terminal that is connected directly to a terminal of the capacitor.