Modular Electric Drive Interface PCBs to Cut Variant Complexity
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Solution Overview
Problem
Existing power electronics units for electric motors exhibit high variance and lack flexibility, necessitating numerous variants for different applications, which complicates manufacturing and increases costs.
Innovation Solution
A modular control unit design with multiple printed circuit boards, where power electronics are housed in a first housing and additional interface functions are separated onto a second housing, allowing for adaptable and flexible configurations tailored to specific electric motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If all required interfaces for different applications are integrated into a single power electronics unit, then full functionality for diverse applications is achieved, but the number of power electronics variants increases and design flexibility is reduced
Solution Approach 1:
The power electronics unit is segmented into a modular architecture with a common base unit and separate, interchangeable interface modules. Each interface module is designed for specific applications (e.g., motor control, renewable energy integration), allowing the system to be configured by combining the base unit with the appropriate interface module(s). This segmentation enables full functionality across diverse applications while maintaining a limited set of standardized components, thereby reducing the total number of variants needed.
Solution Approach 2:
The base power electronics unit is designed with universal functionality that can serve multiple applications through the addition of different interface modules. The base unit includes standardized power conversion components, control architecture, and communication interfaces that can accommodate various load types and application requirements. This multi-functionality approach allows a single base design to support diverse applications, reducing the need for application-specific custom designs.
2Reliability
If a single power electronics unit integrates all interface functions, then complete functionality is achieved, but manufacturing cost and complexity increase
Solution Approach 1:
By segmenting the power electronics into a standardized base unit and modular interface modules, manufacturing can be optimized through economies of scale. The base unit, which constitutes the majority of the system, can be produced in high volumes with consistent quality control, reducing per-unit costs. Interface modules can be manufactured separately and assembled through standardized connection interfaces, allowing for specialized production techniques for each module type while maintaining overall system reliability.
Solution Approach 2:
The modular design allows for merging of standardized components across different applications. Common components such as power semiconductors, control processors, and passive components are consolidated into the base unit, enabling bulk procurement and standardized assembly processes. This merging of common elements across multiple product variants reduces overall manufacturing complexity and cost while maintaining full functionality through the combination of base and interface modules.
3Adaptability or versatility
If interface functions are provided separately from power electronics on additional printed circuit boards, then design flexibility and adaptability are improved, but device complexity and assembly complexity increase
Solution Approach 1:
Interface functions are segmented into separate, standardized printed circuit board modules that can be independently designed, tested, and manufactured. Each interface module connects to the base power electronics unit through standardized mechanical and electrical interfaces, allowing for easy substitution and reconfiguration. This segmentation provides design flexibility while controlling assembly complexity through standardization of connection methods and interfaces.
Data Source
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AI summary
The invention relates to a modularly constructed control unit (100) that is specifically adaptable with regard to interface functions for an electric motor selected from a predetermined set i of electric motors, in particular electric motors of the same power class, wherein the control unit (100) has at least two printed circuit boards (L1, L2) selected from a set of N different printed circuit boards (L1, L2, ..., LN) on which interface functions, electrical components, electronic components or control units for the operation of the electric motor are located.