Dual-Winding Generator Control for Magnetic Coupling Compensation
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Solution Overview
Problem
In induction electric power generators with a stator having a main winding and an auxiliary winding, the magnetic coupling between the windings leads to interference, destabilizing the control system, and existing solutions involving multiple electric power converters increase costs and are limited to systems with equivalent winding specifications.
Innovation Solution
An electric power generation system using one electric power converter that calculates and compensates for the voltage change in the auxiliary winding due to magnetic flux interference from the main winding, allowing stable control of both windings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If one electric power converter is used to control both main winding and auxiliary winding, then cost is reduced, but control stability deteriorates due to magnetic coupling interference
Solution Approach 1:
The controller acts as an intermediary that calculates the interference voltage generated by magnetic coupling between windings and adds it as a compensation term to the control signal. This mediator approach allows single converter control while抵消ing the harmful magnetic coupling effects, maintaining stability without requiring multiple converters.
Solution Approach 2:
The patent converts the harmful magnetic coupling interference into a useful compensation signal. By calculating the interference voltage caused by magnetic flux coupling and adding it to the control command, the previously harmful effect becomes a corrective term that improves control accuracy and stability.
2Reliability
If multiple electric power converters are provided for each winding group, then control stability is improved, but cost increases
Solution Approach 1:
The patent merges the control functions for multiple winding groups into a single electric power converter. The controller integrates control signals for both main and auxiliary windings, using compensation calculations to manage magnetic coupling effects, thereby consolidating what would traditionally require separate converters into one unified system.
Solution Approach 2:
The single electric power converter is designed with multi-functionality to control both main winding and auxiliary winding groups. The controller provides universal control capabilities by calculating compensation amounts based on operating conditions and applying appropriate control signals to different winding groups through the same converter.
3Reliability
If decoupling control computation is performed, then interference voltage compensation is achieved, but control configuration complexity increases
Solution Approach 1:
The controller performs self-service by automatically calculating the compensation amount for magnetic coupling interference based on real-time operating conditions. The system uses signals from the winding groups to compute the necessary compensation without requiring external intervention or complex external control configurations.
Solution Approach 2:
The patent changes control parameters dynamically by calculating compensation amounts based on operating conditions such as rotational speed and load. The controller adjusts the compensation signal parameters in real-time to maintain optimal control performance across varying operating conditions without requiring complex fixed configurations.
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
Stable control of both the main and auxiliary windings is achieved with one converter, reducing costs and eliminating the need for additional converters, while maintaining system stability.
Implementation Method 1
the main winding and the auxiliary winding are magnetically coupled with each other
Implementation Method 2
calculate a voltage change amount of the auxiliary winding generated by interference of a magnetic flux of the main winding with the auxiliary winding
Data Source
AI summary
An object of the present invention is to provide an electric power generation system that can stably control, with one electric power converter, output electric power of a main winding and an auxiliary winding of a dual-winding induction electric power generator. For this purpose, in an electric power generation system including an electric power generator having a stator including a main winding and an auxiliary winding, a rectifier connected to the main winding, an electric power converter that is connected to the auxiliary winding and controls voltages of the main winding and the auxiliary winding, and a controller that outputs a control signal according to a voltage command value of the auxiliary winding to the electric power converter, the controller calculates a voltage change amount of the auxiliary winding generated by interference of a magnetic flux of the main winding with the auxiliary winding, on the basis of a current and the voltage of the main winding, and adds the voltage change amount to the voltage command value of the auxiliary winding.