Stator Jumper Branch Layout for Equal-Resistance Load Balancing
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Solution Overview
Problem
Conventional electric machine stator connection configurations lack efficient load balancing, leading to suboptimal energy distribution across multiple loads.
Innovation Solution
The electric machine incorporates a jumper system with multiple terminal branches and terminals, ensuring that each electrical conduction path from the stator winding to the terminals has substantially equal resistance, thereby achieving load balancing across multiple loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional stator connection configurations are used, then the structure is simple, but the load balancing is poor leading to suboptimal energy distribution
Solution Approach 1:
The jumper is segmented into multiple terminal branches (first terminal branch, second terminal branch, third terminal branch, fourth terminal branch) that can be independently configured. Each branch connects to a specific terminal, allowing separate optimization of each conduction path while maintaining overall system performance and reducing energy loss through balanced load distribution.
Solution Approach 2:
Each terminal branch is designed with specific local characteristics including varying numbers of parallel conductors and different path lengths. The first and second terminal branches have different configurations from the third and fourth terminal branches, allowing each path to be locally optimized while achieving global load balance and minimizing energy loss.
2Loss of energy
If unequal resistance paths are used, then the manufacturing is simpler, but the energy distribution becomes suboptimal
Solution Approach 1:
The resistance of each conduction path is precisely controlled by changing physical parameters including the number of parallel conductors in each terminal branch and the length of conductor paths. By adjusting these parameters, each path's resistance is tuned to achieve substantially equal resistance values, optimizing energy distribution and minimizing losses.
Solution Approach 2:
The connection configuration is designed to create equipotential conditions at the terminals by ensuring substantially equal resistance from the winding end through each terminal branch to its respective terminal. This equipotential design ensures balanced voltage distribution and optimal energy delivery to all loads, reducing energy loss due to resistance imbalances.
3Productivity
If multiple terminal branches with equal resistance are implemented, then the load balancing is optimized, but the device complexity increases
Solution Approach 1:
The jumper structure serves multiple functions simultaneously: it provides electrical connection between the winding end and multiple terminals, enables load balancing across different phases, optimizes energy distribution to multiple loads, and maintains a compact form factor. This multi-functionality justifies the increased structural complexity by delivering superior energy distribution efficiency.
Solution Approach 2:
Multiple terminal branches are merged into a single integrated jumper structure that shares common support elements and winding end connections. The first and second terminal branches are combined in one jumper, while the third and fourth terminal branches are combined in another jumper, both connecting to the same winding end. This merging reduces overall complexity compared to having completely separate connection structures for each terminal.
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 ensures balanced power delivery to multiple loads, optimizing energy distribution and reducing energy loss due to uneven resistance in the conduction paths.
Implementation Method 1
A first electrical conduction path is defined from the winding end, through the jumper to the first terminal branch to the first terminal. A second electrical conduction path is defined from the winding end, through the jumper to the second terminal branch to the second terminal. The first electrical conduction path has an electrical resistance substantially equal to that of the second electrical conduction path
Data Source
AI summary
An electric machine includes a stator winding in a stator having a winding end. A jumper has a main base end that is connected to the winding end. A first terminal branch of the jumper has a first terminal for connecting the stator electrically to a first load. A second terminal branch of the jumper has a second terminal for connecting the stator electrically to a second load. A first electrical conduction path is defined from the winding end, through the jumper to the first terminal branch to the first terminal. A second electrical conduction path is defined from the winding end, through the jumper to the second terminal branch to the second terminal. The first electrical conduction path has an electrical resistance substantially equal to that of the second electrical conduction path for electrical load balancing from the winding end to the first and second terminals.