Motor Bus-Bar Holder Segmentation for Alignment
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Solution Overview
Problem
In rotating electric machines with bus-bar systems, aligning connection terminal parts with electrical components is challenging due to potential shifts in their relative positions, leading to difficulties in establishing effective electrical connections.
Innovation Solution
The motor design incorporates separate bus-bar holders on one side of the stator, each holding multiple bus-bars with connection terminals, allowing for stable positioning and easy electrical connection to power systems, including independent power supply terminals, facilitating the connection of phase bus-bars to a control device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single holder structure is used to hold all bus-bars, then the device complexity is reduced, but the manufacturing precision and alignment accuracy deteriorate when relative positions of electrical components shift
Solution Approach 1:
The single holder structure is divided into multiple separate bus-bar holders (first bus-bar holder, second bus-bar holder, etc.), each independently holding specific bus-bars. This segmentation allows each holder to be positioned and adjusted independently, maintaining alignment accuracy even when electrical component positions shift, while avoiding the complexity of a single large adjustable holder.
2Adaptability or versatility
If bus-bar holders are made as separate members divided from each other, then the adaptability and ease of adjustment improve when relative positions shift, but the device complexity increases
Solution Approach 1:
Each bus-bar holder is designed as a universal component that can hold multiple bus-bars (e.g., the first bus-bar holder holds both the first and second bus-bars). This multi-functionality reduces the total number of separate holders needed while maintaining the adaptability to position shifts, as each universal holder can accommodate variations in bus-bar positions independently.
3Manufacturing precision
If connection terminal parts are rigidly fixed to the holder, then the manufacturing precision is improved, but the ease of operation deteriorates when relative positions of electrical components shift
Solution Approach 1:
The bus-bar holders are designed with adjustable positioning capabilities, allowing them to be moved and repositioned along the stator core to accommodate shifts in electrical component positions. The holders maintain rigid fixation of bus-bars once positioned, ensuring manufacturing precision, while the dynamic repositioning capability provides ease of operation when position shifts occur.
Data Source
AI summary
A motor includes a rotor with a shaft disposed along a central axis, a stator including coils and facing the rotor via a gap in a radial direction, bus-bars electrically connected to the stator, and bus-bar holders on one side in the axial direction of the stator that are distinct members separated from each other. The coils define coil groups having power systems different from each other. Each of the bus-bar holders holds at least one of the bus-bars different from each other. In each of the bus-bar holders, at least one of the bus-bars held on the bus-bar holder includes a connection terminal electrically connected to an electrical component.