Railway Switch Drive Generator Coupling for Safe IoT Power
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Solution Overview
Problem
Conventional electromechanical switch drives for rail vehicle tracks face challenges in supplying power to auxiliary components like IoT devices without interfering with safety-critical functions, leading to bulky battery solutions or unreliable solar charging due to harsh environments.
Innovation Solution
An electromechanical switch drive system that integrates an electric generator coupled to the output shaft of the electric motor, charging an accumulator during switch operations, with a coupling system that selectively connects the generator to the motor shaft based on rotational speed and control signals, ensuring safe and efficient energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery-operated IoT components are used to prevent electrical interference, then safety functions are protected, but the system becomes bulky and heavy due to large battery capacity requirements
Solution Approach 1:
The patent combines the power supply for auxiliary components with the existing motor power supply system by integrating a generator into the motor drive. The generator is mechanically coupled to the motor shaft and generates electricity during motor operation, eliminating the need for separate battery power sources for IoT components while maintaining safety through controlled power distribution.
Solution Approach 2:
The system uses the motor's own operational energy to charge the accumulator and power auxiliary components. During motor operation, the generator converts mechanical energy from the motor shaft into electrical energy, which is stored in the accumulator and used to power IoT components, making the system self-sufficient without external or heavy battery sources.
2Use of energy by stationary object
If solar panels are used to charge batteries, then external power sources are utilized, but charging is unreliable due to harsh trackside environments
Solution Approach 1:
The patent extracts the power generation function from external environmental sources (like solar panels) and relocates it directly to the motor drive system. The generator is integrated into the existing motor mechanism, utilizing the mechanical energy already present in the system rather than relying on external environmental conditions for power generation.
3Use of energy by moving object
If the generator is permanently coupled to the motor shaft, then continuous power generation is achieved, but safety functions are compromised due to electrical interference risks
Solution Approach 1:
The coupling between the generator and motor shaft is made dynamic rather than permanent. The generator is mechanically coupled to the motor shaft through a controllable connection that can be engaged or disengaged based on operational requirements. This allows the system to generate power when needed while maintaining the ability to isolate the generator for safety-critical operations.
Solution Approach 2:
The patent introduces a controllable coupling mechanism as an intermediary between the motor shaft and generator. This intermediary component allows selective mechanical connection, enabling power generation during non-critical operations while providing isolation during safety-critical operations, thus mediating between power generation needs and safety requirements.
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
Ensures reliable and safe energy supply to auxiliary components without compromising switch reliability, eliminating the need for bulky batteries and external charging systems, while meeting safety requirements.
Implementation Method 1
an electric generator with a generator shaft that is or can be coupled to the output shaft; an electric accumulator that is or can be electrically connected to the generator for charging
Data Source
Figure 1
AI summary
The invention relates to an electromechanical switch drive system (1) for a track switch (2) of a rail vehicle track (3, 4, 5), comprising: an electric motor (8) with an output shaft (9) coupled to at least one switch tongue (7a, 7b) of the track switch (2); an electric generator (11) with a generator shaft (12) which is or can be coupled to the output shaft (9); an electric accumulator (14) which is or can be electrically connected to the generator (11) for charging.