Asynchronous AC Induction Machines Cross-Interlockingly Series Connection
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Solution Overview
Problem
Conventional systems connecting multiple asynchronous AC induction electrical machines to drive a common load are complex, unreliable, and have long response times, leading to instability and jostle phenomena, especially in applications like trams with varying loads.
Innovation Solution
The machines are connected in a cross-interlockingly series configuration with main and control windings, allowing for variable impedance operations and real-time adjustments based on load variations, simplifying the system, increasing reliability, and reducing response times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional central controller-based control systems are used to coordinate multiple electrical machines, then control capability is provided, but system complexity increases, reliability decreases, and response time increases
Solution Approach 1:
The invention extracts and removes the central controller from the system, replacing it with a decentralized control architecture where each electrical machine's control device operates autonomously. The control function previously centralized is distributed to individual control devices that directly sense and respond to load variations without external coordination, thereby eliminating the complexity and reliability issues associated with central controllers while maintaining full control capability.
Solution Approach 2:
Each electrical machine's control device is designed to autonomously detect load variations and adjust its own operating parameters without external control signals. The control devices self-regulate the electrical machines based on real-time feedback from their respective loads, enabling the system to self-coordinate multiple machines without requiring a central controller, thus simplifying the system architecture and improving reliability.
2Loss of time
If conventional central controller-based control systems are used to coordinate multiple electrical machines, then control capability is provided, but response adjustment time increases
Solution Approach 1:
By removing the central controller and its associated communication infrastructure, the invention eliminates the signal transmission delays and processing bottlenecks inherent in centralized control architectures. Each control device operates independently with direct access to load information, enabling instantaneous response to load variations without the time penalties of centralized signal routing and processing.
Solution Approach 2:
The autonomous control devices continuously monitor their respective electrical machines and loads, immediately detecting and responding to load variations without waiting for central controller commands. This self-service approach enables real-time adjustment of operating parameters, dramatically reducing the response adjustment time compared to conventional centralized systems that must process and transmit control signals through a central hub.
3Stability of the object's composition
If cross-interlockingly series connection is implemented, then real-time response and stability improve, but winding connection complexity increases
Solution Approach 1:
The invention employs an asymmetric cross-interlocking connection pattern where control windings of one electrical machine are connected to main windings of another, creating a non-reciprocal interconnection structure. This asymmetric arrangement establishes direct electromagnetic coupling between machines, enabling automatic load sharing and real-time coordination through inherent electromagnetic interactions rather than symmetric point-to-point connections, thereby improving stability while managing connection complexity through systematic asymmetry.
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 enables stable and responsive operation of asynchronous AC induction electrical machines by allowing each machine to interact electromagnetically, improving system stability and reducing jostle phenomena in applications with varying loads.
Implementation Method 1
the first electrical machine control winding and the first electrical machine main winding are windingly installed on the same polar axis or windingly installed at electrical angle between polar axes within the first electrical machine
Implementation Method 2
the operation effect of the first electrical machine and the second electrical machine being cross-interlockingly series connected to drive the load individually is led by the changes of individual electrical machine driving loading statuses to appear variable impedance operation so as to change the end voltage ratio between individual electrical machines in cross-interlockingly series connections thereby allowing each individual electrical machine to produce interaction of required electromagnetic effect
Data Source
AI summary
At least two asynchronous AC induction electrical machines in series connection with the power source are respectively made with the main winding and control winding for operating the electrical machines, wherein the individually driven loading operations of the two electrical machines in cross-interlockingly series connection being series connected with the power source are led by the changes of individual electrical machine driving loading statuses to appear variable impedance operation so as to change the end voltage ratio between individual electrical machines in cross-interlockingly series connections.