Design of an Electronic Control PCB for Thermoelectric Modules Using Relay Circuits and Hysteresis Loop Regulation in Railway Braking Systems

The article focuses on the design of a printed circuit board (PCB) for regulating the power of thermoelectric modules using relay circuits. It builds upon the findings presented in Electronic Regulation of Thermoelectric Modules in a flow Cooler, which outlined two potential solutions for controlling thermoelectric modules. The first approach employs relay circuits, with their proper operation relying on hysteresis loop control, while the second utilizes pulse-width modulation (PWM) in combination with a transistor circuit. This study provides a detailed description of the PCB design for implementing the relay-based control system, with the ATmega328P microcontroller serving as the control unit. The research includes a comprehensive analysis of hardware and software requirements, the design of circuit schematics, and the selection of appropriate components. The proposed device offers a practical and flexible solution for the efficient management of thermoelectric modules in a flow-through water cooler for the UIC brake testing stand. Furthermore, the article underscores the critical importance of precise regulation in obtaining reliable and reproducible results. Specifically, the accurate monitoring and cooling of water during wet testing plays a pivotal role in generating simulations that faithfully replicate real-world conditions. As the development of brake pad materials increasingly prioritizes the use of environmentally sustainable components, it becomes imperative that temperature readings are meticulously controlled to ensure the validity and precision of these simulations. The research emphasizes that achieving an optimal and stable testing environment is not only essential for ensuring the accuracy of the outcomes but also for enhancing the reliability of brake system performance under actual operating conditions.