Power Supply Unit for Electric Machine Stator Winding
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Solution Overview
Problem
Conventional distributed windings in electric machines have increased manufacturing costs and limited flexibility, as the operating parameters such as pole pair number are fixed during design and cannot be altered during operation, leading to inefficiencies and vibration issues.
Innovation Solution
A power supply unit that supplies multiple conductor portions of a stator winding with different operating parameters, allowing for adjustable current functions such as pole pair number, frequency, and phase angle, enabling flexible and efficient operation by superimposing current functions across conductor portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If distributed windings are used to reduce harmonics and improve machine performance, then the magnetomotive force has fewer overtones and the machine performance improves, but the manufacturing expenditure increases due to complex winding heads and long connecting wires
Solution Approach 1:
The stator winding is segmented into multiple independent conductor portions, each supplied with individually controllable current functions. This allows the winding to achieve distributed winding performance through multiple separate conductors rather than long continuous wires, reducing manufacturing complexity while maintaining harmonic reduction benefits
Solution Approach 2:
The invention enables dynamic change of operating parameters (pole pair number, frequency, amplitude) by controlling different conductor portions with different current functions. This allows the system to adapt between distributed winding configuration (for harmonic reduction) and simpler winding configurations (for manufacturing ease) depending on operational requirements
2Reliability
If conventional distributed windings are used to achieve good electric properties, then the magnetomotive force has smaller portion of overtones, but the operating parameters such as pole pair number are fixed during design and cannot be altered during operation
Solution Approach 1:
The invention transforms the static distributed winding into a dynamic system where conductor portions can be selectively activated and deactivated. By controlling which conductor portions are active and their current parameters, the system can dynamically change pole pair number and other operating parameters while maintaining the harmonic reduction benefits of distributed windings
Solution Approach 2:
Each conductor portion is designed to be universally controllable with independent current functions, allowing the same physical winding structure to serve multiple functions: operating as distributed winding for harmonic reduction, operating with different pole pair numbers, and adapting to various operating conditions. This multi-functionality resolves the contradiction between fixed design and operational flexibility
3Object-generated harmful factors
If distributed windings with numerous coils per pole per phase are used, then the machine performance improves with less rotor loss and vibration, but the winding head becomes complex requiring long wires to bridge over multiple stator teeth
Solution Approach 1:
The winding is divided into multiple discrete conductor portions that can be independently controlled. This segmentation replaces the need for complex continuous winding paths with multiple separate conductors, simplifying the winding head design while maintaining the distributed winding configuration that reduces rotor loss and vibration through harmonic cancellation
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 approach simplifies manufacturing and operation, reduces rotor losses, noise, and vibration, while allowing for adjustable operating parameters to maximize efficiency and extend the life cycle of the system, achieving high performance similar to distributed windings with reduced complexity.
Implementation Method 1
a power supply unit configured for supplying multiple conductor portions (3) of a stator winding (5) of an electric machine... the power supply unit supplies a first of the conductor portions and a second of the conductor portions with at least one different operating parameter of a respective current function
Data Source
AI summary
The invention relates to a power supply unit for supplying multiple conductor portions (3) of a stator winding of an electric machine which are inserted in respective slots (2), wherein the power supply unit is configured to supply a first conductor portion and a second conductor portion with at least one different operating parameter of a respective current function and/or the power supply unit is configured to supply a conductor portion with at least two superimposed current functions, which in each case have at least one different operating parameter. Furthermore, the invention relates to an electric machine having such a power supply unit.