Dynamic Stator Coil Reconfiguration for Variable Speed Torque
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electric machines are limited to a single speed torque characteristic due to static coil configurations, leading to inefficiencies in variable speed applications, and rely on complex and costly power electronics to achieve greater control, which introduces additional losses.
Innovation Solution
A dynamic electromagnetic technology platform that reconfigures stator and armature coils in real-time under loaded conditions using an optimized switching system and intelligent controller, allowing the electric machine to operate as multiple machines, optimizing efficiency and performance across a wide range of operating conditions without the need for complex power electronics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a static, hardwired coil configuration is used in electric machines, then the machine structure is simple and manufacturing is easy, but the machine can only operate at a single speed torque characteristic, leading to significant losses in variable speed applications
Solution Approach 1:
The patent applies dynamics by transforming the static, hardwired coil configuration into a dynamic reconfigurable system. Switching elements are integrated into the coil windings to enable real-time reconfiguration of the stator and armature coils, allowing the electric machine to adapt its winding configuration according to operating conditions and maintain high efficiency across variable speed applications.
Solution Approach 2:
The patent changes the electrical parameters of the machine by reconfiguring the coil windings between series and parallel connections. This allows the machine to alter its effective number of turns and winding factor, thereby changing the torque-speed characteristic to match different operating requirements without physical modification to the machine structure.
2Adaptability or versatility
If complicated power electronics are used to create greater control, then the speed torque characteristic is improved, but additional losses are introduced that rapidly increase at approximately 50% of full load
Solution Approach 1:
The patent extracts the control function from external power electronics and relocates it directly into the machine windings themselves. By integrating switching elements within the coil structure, the system achieves precise control of the magnetic field and torque production without the need for complex external power electronic converters, thereby eliminating their associated losses.
Solution Approach 2:
The switching elements integrated into the windings act as intermediaries between the power source and the magnetic field generation. These switches enable direct control of the coil current distribution, allowing the machine to optimize its magnetic field configuration for different operating points without relying on indirect control through power electronics.
3Loss of energy
If the coil configuration is reconfigured in real-time under loaded conditions, then efficiency is improved across a wide range of operating conditions, but the switching control system adds complexity to the machine structure
Solution Approach 1:
The patent merges the switching control functionality directly into the coil windings structure. The switching elements are integrated within the stator and armature coil assemblies, combining the functions of power conduction and configuration control into a single unified structure, thereby minimizing additional complexity while enabling real-time reconfiguration.
Solution Approach 2:
The machine performs self-optimization by automatically reconfiguring its own coil windings based on operating conditions. The control system monitors the operating state and triggers appropriate switching sequences to reconfigure the windings, allowing the machine to maintain optimal efficiency across varying loads and speeds without external intervention or complex additional control hardware.
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 solution reduces losses and enhances performance by dynamically optimizing the electric machine's configuration, enabling efficient operation across a broad range of speeds and torque characteristics, potentially reducing the need for mechanical and electrical components like gearboxes and boost converters.
Implementation Method 1
The switching control system connects multiple stator coil windings and multiple armature coil windings in varying series or parallel combination
Implementation Method 2
The present application is directed to rotating electric machines, for example, an electric generator, electric motor, or regenerative motor
Data Source
AI summary
This application generally relates to electric machines with coils or windings (e.g., generators and motors), and more particularly to systems, apparatus, and methods that configure coils or windings of electric machines, for instance dynamically in response to operational condition and under load.