High-voltage Motor Cascade Speed Source Inverter Control And Implementation Of Fault Protection

Attention to the current world energy problem in general, how to use limited resources to play a greater benefit is the issue we must solve. The power of modern industrial production of primary energy and power is electrical energy, about 60% consumed by high-voltage motors. The energy efficient features of Cascade induction motor speed control is of strategic importance. Cascade control system need to design a reasonable operating state transition logic in use, so that it can the normal operation on start and stop, and have the necessary system self-test diagnostics. Meanwhile, In the case of situation of the speed control system or electrical system failure, it needs reasonable systems and protection of equipment.This article introduced the working principle of modern chopper cascade speed control system at first. According to the control system functions and the different control objectives,explained why choose PLC cascade speed control system as the main controller, and then carried out on the PLC model, and its digital expansion module, analog expansion module and peripheral devices selected. Troubleshooting the system is divided into several parts, and then some of the features of each module design a cascade control system fault protection control. Selected the controller PLC, digital expansion module, analog expansion module and peripheral devices,Designed cascade control system fault protection control。Completed the turn at full speed, full-speed stop switch, speed switch to parking, speed control switch to stop failure, fault switch to full speed the process of failure such as failure of treatment programs. Complete system protection: over-voltage protection, fast-acting protection. For the modern chopper inverter cascade control system, active control, is proposed based on FM352-5 high-speed intelligent control module, new ideas Inverter...