Diseño de un sistema de control automático para un banco de pruebas de motores eléctricos

Abstract

This project proposes the modernization of a Hampden MPB-2 dynamometer test bench (magnetic particle brake) to enable repeatable and traceable motor testing. The objective is to integrate electronic instrumentation and remote supervision to execute tests, record electrical and mechanical variables, and deliver a technical report. The hypothesis is that automating the test sequence and using an appropriate data acquisition architecture increases measurement consistency compared to manual procedures, which is justified by the need to reduce errors and post-processing time. A control panel including protections, a 24 VDC power supply, an S7-300 PLC, and Ethernet communication was designed and implemented. A SENTRON PAC3220 power analyzer was integrated via Modbus TCP, together with a load cell and a speed sensor, while a Node-RED interface and Python post-processing were developed to export CSV files and generate PDF reports. Performance curves were obtained for a three-phase Hampden WRM-2 motor, identifying a breakdown torque of 25.8 Nm in the range of 900 to 1100 RPM and a power factor greater than 0.93 between 10 and 18 Nm. Additionally, during the validation of the star-delta starting maneuver with a Siemens motor, stabilization close to 1720 RPM was recorded. Keywords: Industrial automation, Electronic instrumentation, Node-RED, Industrial communications, Torque.