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Over the last few decades, the unsustainable exploitation of natural resources and the environmental degradation have reached alarming rates. Nevertheless, we have started to witness a shift toward more robust environmental protection, with regulation policies being enforced and with a steady increase in public awareness. In our study, we focus on worldwide pollution by investigating low‐emission...
The paper presents the study and operating control of an electromechanical actuator with volatile liquid (EAVL). The paper proposes a practical approach for EAVL displacement control using a PLC technology and a linear potentiometer transducer. Proposed electromechanical actuator has two essential features: low linear displacement and high strength. The electromechanical actuator is a technical dynamic...
For engineering students, it is very important that the laboratory work should be more practical, in order to provide an experience closer to the real world applications. In this paper, a solution to study the positioning control of two axes is presented. The solution is made with a PLC, two kind of HMI, a drive capable to manage two axes with high performance positioning, an induction motor and a...
In this paper, different solutions for power supply of a resistance used for the liquid heating were analyzed. The authors propose the best solution in terms of reliability, harmonic pollution of power network and precision temperature control. For this were used: the XC-CPU101 PLC, the XV102 HMI (Human Machine Interface) from EATON. The temperature control used a PID controller based on PLC and it...
The three-phase squirrel-cage induction motors are mostly used in industrial drivers since they are rugged, reliable and economical. The DC bus voltage of the AC drives increases when the motor regenerates. The regenerating energy is usually released in the form of heat. A short mathematical description and the experimental results for different cases of dynamic brake regime are presented in our paper...
LED lamps have many advantages in comparison with incandescent lamps, halogen lamps and compact fluorescent light lamps. Although produce harmonic pollution due to the drivers used for their power supply, they are becoming increasingly used nowadays. This paper presents a study of the harmonics from dimmable LED lamps, using reconfigurable CompactRIO system. Various available dimmable LEDs were tested...
Designing ACS (automatic control system) in closed loop was more an art than science until the Industrial Revolution, when mathematics began to be used (for the first time in the middle of nineteenth century) in stability analysis of ACS in closed loop. Currently, the automation of industrial installations is carried out either using PLCs (Programmable Logic Controller) or using PACs (Programmable...
In many specific laboratories the students use only a PLC simulator software, because the hardware equipment is expensive. This paper presents a solution that allows students to study both the hardware and software parts, in the laboratory works. The hardware part of solution consists in an old plotter, an adapter board, a PLC and a HMI. The software part of this solution is represented by the projects...
Today, in most automatic process control applications in industry are used PID controllers. It is very important for the students to understand how work these controllers and how important it is to make an optimal tuning of these controllers. This paper presents a solution which permits to study and understand PID controllers. This solution is a closed-loop speed control system in a centrifugal load...
This paper presents a study of the deforming regime generated by different light sources. We use several kinds of light bulbs: incandescent, gas discharge lamp and light-emitting diodes. For the acquisition and the analysis of voltage and current signals we use reconfigurable CompactRIO system from National Instruments. It allows real time monitoring of both voltage/current signals and deforming regime...
The IGBT is one of most important power semiconductor device for converter applications from several hundred watts up to 2 MW. This is used only in commutation mode and combines advantages of a MOSFET's (high gate resistance) and bipolar transistor's (small collector-emitter drop at saturated condition). When we use IGBTs for converter application it's very important to choose an optimum solution...
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