SAMREC Project: Variable Speed Multi-Motor Drive System
SAMREC Project: Variable Speed ​​Multi-Motor Drive System
Project director: Dr. Marcel Nicola (Researcher ICMET Craiova)
General project data
- English title: Multi-engine drive system with variable speed and network recovery of individual braking power used in applications with high dynamics
- Acronym: SAMREC
- Duration: 39 months
- Total amount: 806,000 lei (includes attracted sources)
- Contract value (state budget): 700,000 lei
Consortium partners (2 participants)
- ICMET Craiova (Coordinating)
- CESI Automation Craiova (Industrial Partner)
Project summary and technical characteristics
We propose the creation of an innovative electronic device. It simultaneously drives three asynchronous motors. We use the three-phase industrial network of 0.4kV/50Hz. The equipment is intended for variable speed electric drives. Two or more asynchronous motors are used. They have a short-circuited rotor. The products are excellently applied in industry. They are also perfect in electric traction.
Main electrical characteristics:
- Supply voltage: 3x400Vac;
- Frequency converters: 2x55KW;
- Output frequency: 0÷400 Hz;
- Frequency or torque synchronization.
Block diagram of the electronic device
The scheme designed by this research topic is complex. It contains the following basic functional blocks:
- The coupling circuit to the industrial network (connection and protection role);
- Diode rectifier block and filter for the intermediate circuit;
- The inverter for recovering individual braking energy in the network;
- Frequency converters made in advanced IGBT technology;
- The DSP control unit that controls each functional block.
The inverter replaces the classic choppers and braking resistors. The frequency converters will operate in master-slave mode. They use the modern vector control method.
Areas of use and major advantages
Industrial fields of application:
- Cement industry (mills and conveyor belts);
- Paper manufacturing industry (drums);
- Extractive industry (excavators and backhoes);
- Urban electric traction (tram, trolleybus, metro);
- Railway traction (locomotives, electric multiple units);
- Other complex multi-engine applications.
Advantages of using the device:
- Optimal loading of each electric motor;
- Individual and safe protection of each engine;
- Using a single DC circuit;
- Significant increase in energy efficiency;
- Reduced cost compared to classic equipment;
- Modular design for much easier service.
Development stages and results
Stage 1 (Completion deadline: 31.12.2014)
We have carefully analyzed the current technological context. This directly concerns multi-motor electric drives. We have rigorously inventoried the specific methodologies in the industry. We have also studied in detail the already existing theoretical foundations.
Stage 2 (Completion deadline: 31.12.2015)
We have successfully completed the execution documentation. It describes in detail the desired functional model. The targeted system is the multi-motor drive. The technical specifications comply with all European quality standards.
Stage 3 (Completion deadline: 31.12.2016)
We have developed the execution documentation in an advanced form. We have partially realized the functional model of the entire system. We have drawn up the legal documents necessary for the protection of the invention. Thus, we have developed the proposal for the protection of industrial property rights.
Stage 4 (Completion deadline: 30.09.2017)
We have fully completed the technical documentation of the research project. We have physically realized and rigorously tested the functional model. Finally, we have evaluated the data and ensured its dissemination. The results confirm the practical utility of the new multi-motor drive system.
Scientific publications, patents and remarkable results
Scientific papers and conferences (Part 1)
- M. Nicola, D. Sacerdotianu, A. Hurezeanu. Sensorless Control in Multi-Motors Electric Drives with High Dynamic and Flexible Coupling. Proceedings of The 7th International Conference on Modern Power Systems (MPS 2017), Cluj-Napoca, June 6-9, 2017.
- M. Nicola, D. Sacerdotianu, A. Hurezeanu. Simulation and Implementation of Sensorless Control Using Estimators in Electric Drives with High Dynamic. Annals of the University of Craiova, Electrical Engineering Series, 2016.
- M. Nicola, D. Sacerdotianu, A. Hurezeanu. Sensorless Control Using the Model Reference Adaptive Control Estimator in Electric Drives with High Dynamic. International Conference on Applied and Theoretical Electricity ICATE 2016, Craiova, 6-8 October 2016.
- M. Nicola, D. Sacerdotianu, M. Duta, CI Nicola. Simulation of AC-AC converters using the Simulink-Matlab environment. National Symposium on Informatics, Automation and Telecommunications in Energy SIE 2016, pp. 262-265, Sinaia, 26-28 October 2016.
Scientific papers and conferences (Part 2)
- M. Nicola, D. Sacerdotianu. Simulation of electric drive systems for intelligent urban transport vehicles. SINGRO 2016 Scientific Symposium of Romanian Engineers Worldwide, Craiova, September 2016 (published in AGIR Bulletin no. 1/2017).
- M. Nicola, D. Sacerdotianu, C. I. Nicola, A. Hurezeanu. Simulation and Implementation of Sensorless Control in Multi-Motors Electric Drives with High Dynamics. Advances in Science, Technology and Engineering Systems Journal ASTEJ, Vol. 2, No. 4, 59-67 (2017).
- M. Nicola, D. Sacerdotianu, A. Hurezeanu. Sensorless Control in Multi-Motors Electric Drives with High Dynamic and Rigid Coupling. Proceedings of Joint International Conference Optimization of Electrical & Electronic Equipment and Aegean Conference on Electrical Machines and Power Electronics (OPTIM-ACEMP), pp. 495-500, Brasov, 2017.
Patents and awards granted
- Invention Patent (OSIM): A. Hurezeanu, M. Nicola, F. Velea. Method and equipment for numerical control and monitoring of multi-motor electric actuators with braking energy recovery, used in high-capacity extraction installations. OSIM CBI-A00749/24.10.2016, RO 131719 A0, RO 131719 A8.
- Silver Medal (EUROINVENT): Diploma and silver medal for the work "Method and equipment for digital control of multi-motor electrical drives with braking energy recovery...", European Exhibition of Creativity and Innovation, May 2017, Iasi.
- Gold Medal (PRO INVENT): Diploma of excellence and gold medal for the work "Method and equipment for numerical control and control of multi-motor electric actuators...", International Invention Salon, March 2017, Cluj-Napoca.
SAMREC project audit reports
Audit Stage 1 (Deadline: 31.12.2014)
We have conducted an analysis of the current technological context in the industry. The field studied is that of multi-motor electric actuators. We have carefully inventoried all the specific published methodologies. We have also integrated the existing theoretical foundations into the study.
Audit Stage 2 (Deadline: 31.12.2015)
We developed and implemented a preliminary technical version. This contains the execution documentation for various subassemblies. The functional model of the multi-motor drive system was directly targeted. The design proceeded exactly according to the proposed implementation schedule.
Audit Stage 3 (Deadline: 31.12.2016)
We have elaborated in detail the necessary execution documentation. We have successfully built, albeit partially, the complex functional model. In addition to the technical aspects, we have also ensured the legal side. We have formulated a valid proposal for the protection of industrial property rights.
Audit Stage 4 (Deadline: 30.09.2017)
We have officially finalized the final technical documentation of the project. We have tested the entire proposed functional model with excellent results. We have evaluated the technological performances at the industry level. All the accumulated information has been disseminated to the international scientific community.
Contact and details of project director
Project manager: Researcher St. II dr. eng. Marcel Nicola
E-mail: marcel_nicola@yahoo.com
Address: ICMET Craiova, Decebal Blvd. no. 118A
