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A new direction of active learning methodology discussed in the paper is focused on differential teaching of technical disciplines for the strong and the weak learners. Taking into account that the difficulty of engineering degrees hinders motivation and affects high levels of absenteeism and dropping out, the research stresses on the reasons of student's failures and dissatisfaction. Following the...
This paper concerns the problem of operating region enlargement for centrifugal pumps. A hybrid management system is described, which combines both the valve throttling and the pump speed adjustment at variable consumer's demands and piping conditions. Solution of the consumed power minimization problem is found and realized with the flexible energy management controller-oriented software. To provide...
The growing energy market and increasing energy costs require new solutions in pumping technology aiming to rise the energy efficiency. In the study, a novel centrifugal pump predictive control organisation is proposed. Unlike the traditional speed-oriented pump regulation, an efficiency-oriented approach is realised where the specific power loss in the motor drives are taken into account alongside...
The paper focuses on the flexible management of the centrifugal pumps with variable speed drives primarily used for water circulation in closed processes, such as heating, cooling, and air conditioning. The goal of the study is to implement the mutual pressure and flow control, which provides the minimal electricity consumption along with the speed range enlargement. To resolve the problem, two methods...
In this paper, the simulation environment is proposed that enables accurate full-scale investigation of the pressure adjustment for a centrifugal pump. The novel Matlab model is described, the pumping control procedure is explained, and the simulation results are assessed with the help of an experimental pumping test bench. Basing on thorough inspection of the developed software, the offered toolbox...
A novel method is offered to control centrifugal pumping stations with variable speed drives and programmable logical controllers. Using pre-defined tabularized data, efficiency estimates are applied for different number of pumps operated at various speeds. The control strategy is proposed basing on both the analytical performance characteristics and the experimental efficiency distribution diagrams...
A novel head and pressure predictive control approach is offered for the centrifugal multi-pump stations equipped with variable speed drives and programmable logical controllers. The pre-defined tabularized data are used where the efficiency estimates for different number of pumps operated at various speeds are collected. Thanks to accounting the motor drive power losses, maximal system efficiency...
The paper focuses on the smart fluid adjustment of the centrifugal pumping station. The goal of the study is to provide the pressure management at minimal consumed energy. To solve the problem, the sensorless prediction method is proposed. The multi-motor variable speed drive has been designed and analyzed. A research is supported by experiments on the ABB Ebara CDX 120/12 pumping station fed by five...
A hardware-in-the-loop model of a centrifugal pump is proposed. The new simulator consists of the pump and pipeline imitators built on the basis of the variable speed drives connected via the programmable logical controller and Profibus communication components. The mathematical description of the flow maintenance represents a core of the simulation methodology. To study the system, a series of tests...
A hardware-in-the-loop (HIL) model of a vessel electric propulsion drive is proposed. The mathematical description of the vessel trust forces is explained. As well, the propulsion power and torque estimates are discussed within the broad spectre of their parameter changing. A case study is reported where some concrete parameters are applied in the above mathematical model to assess the particular...
A hardware-in-the-loop (HIL) model of a centrifugal pump is proposed. The HIL simulator consists of the pump and pipeline imitators built on the basis of the variable speed drives (VSD) connected via the programmable logical controller (PLC, and profibus communication components. The mathematical description of the pressure maintenance represents a core of the simulation methodology. To study the...
This paper concentrates on the methodology-oriented components of remote laboratory arrangement in the field of electrical drive. An active learning approach proposed to support online experimentation on the servo-drives, step drives, and induction motor drives helps the students to employ novel online tools and devices, to face real-world situations, and to interact with peers in circumstances that...
A remote environment proposed in the paper enables the study electrical drives via the Web. The active learning concept of the distance education and the set of Internet-based laboratory works open the possibility to learn Basic and Advanced Courses of Electrical Drive providing a lot of benefits for both the learners and the faculty. The remote labs for the bachelor and master students are presented...
The basic problem of this paper is an estimation of the regenerative braking and downhill driving in terms of the battery electrical vehicle energy saving capabilities. Using an author's toolkit, the benefits of the DTC control of regeneration upon the scalar one are shown and explained. The propulsion motor drive was experimentally studied on the laboratory imitator.
The basic problem this paper addresses is the recovery of the kinetic energy lost during braking and downhill driving in a battery electrical vehicle. The aim is to compare different modes of the drive performance and arrangement in terms of their possibility to save energy. The force, power and energy estimating procedures are discussed. Properties affecting the braking energy regeneration are analyzed...
The analysis of the promoted innovative setups and practices of educational systems revealed the necessity to develop an active learning approach. On-lecture assessment methods developed in the active learning context and introduced into Electronics, Power Electronics, and Electrical Drives promote ultimately students' progress increasing the quality of learning. To motivate students, specific self-assessment...
Despite of broad availability and numerous attractive features, single-phase induction motors (SPIMs) are still not in use in the vehicular applications because of their difficult starting, complexity of the low-speed operation, and some other control drawbacks. This work focuses on the design of the variable-speed capacitor-run SPIM drive. The motor behavior upon the broad speed range regulation...
The paper concerns the analysis of the propulsion drives for the battery-fed electric vehicles. Proposed power and torque estimations help to compare different models of the drives in terms of their dynamic performance at start-up and braking, static stability on the road, energy consumption, and control suitability. Focus is on the assessment and verification of various motors from the viewpoint...
An effective role of concept mapping in teaching, learning, and assessment in Power Electronics is described. It is shown that the concept maps are a suitable tool to support teachers in promoting students' comprehension of the contents of learning material and improving their understanding of new concepts. This technique helps students to see what they have acquired from the classes. It develops...
The paper explores Web technology, specifically social networking, which supports students' activity to enhance acquisition of Electrical Engineering disciplines. The results of the three-year study of the institutional learning management system, the thematic-oriented site, and the social network are presented. It was found that management of the learning content that combines various Internet services...
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