Multi-Winding Generator Harmonic Control for Torque Ripple Reduction
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Solution Overview
Problem
Conventional torque ripple control methods for multi winding set generators are inadequate in providing sufficient reduction, particularly due to manufacturing inaccuracies in stator and rotor components.
Innovation Solution
A method and arrangement for controlling a multi-stator-segment generator with plural winding sets, involving separate determination and injection of harmonic reference currents based on individual operating points of each winding set to account for manufacturing deviations, using a dq-frame and converters for optimal ripple reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional torque ripple control methods are used, then the control system is simple, but torque ripple reduction is insufficient due to manufacturing inaccuracies
Solution Approach 1:
The control system is segmented into multiple independent control channels, each dedicated to a specific winding set. Each channel independently determines harmonic reference currents for its associated winding set based on individual operating points, allowing customized torque ripple compensation for each segment while maintaining overall system effectiveness.
Solution Approach 2:
The patent applies local quality by determining harmonic reference currents specifically tailored to each winding set's operating conditions and manufacturing characteristics. Each winding set receives customized harmonic compensation currents that address its specific torque ripple issues, rather than applying a uniform control approach to all winding sets.
2Reliability
If separate control for each winding set is implemented, then torque ripple reduction effectiveness improves, but control complexity increases
Solution Approach 1:
The control arrangement employs a universal control architecture that handles multiple winding sets through standardized control modules. Each winding set is controlled through its own converter and control module, but all follow the same fundamental control strategy and structure, enabling the system to manage complex multi-winding configurations through a unified, scalable framework.
Data Source
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AI summary
It is described a method of controlling a generator (116) having a multi-stator-segment stator (101) comprising a first stator-segment (102a, S1) having a first multi phase winding set (104) and at least one second stator-segment (103a, S1) having least one second multi phase winding set (105), the method comprising: receiving first input signals (118_1) indicating an operation point of the first winding set (104); receiving second input signals (118_2) indicating an operation point of the second winding set (105); determining a first harmonic reference current (120_1) of at least one harmonic based on the first input signals; determining a second harmonic reference current (120_2) of at least one harmonic based on the second input signals; controlling the first winding set (104) based on the first harmonic reference current (120_1); controlling the second winding set (105) based on the second harmonic reference current (120_2).