Institute of LUT Energy

Finland

Institute of LUT Energy

Finland
SEARCH FILTERS
Time filter
Source Type

Minav T.A.,Lappeenranta University of Technology | Filatov D.M.,Saint Petersburg State University | Vtorov V.B.,Saint Petersburg State University | Laurila L.I.E.,Lappeenranta University of Technology | Pyrhonen J.J.,Institute of LUT Energy
International Review of Automatic Control | Year: 2012

The purpose of this study is to demonstrate the utilization of the capabilities of modern electric drives to control a hydraulic forklift system. The test drive consists of a Direct Torque Control (DTC) controlled electric servo motor directly running a reversible hydraulic pump. A self-tuning-parameter fuzzy PID controller is designed to control the rotation speed of the Permanent Magnet Synchronous Machine (PMSM). Simulations and measurements are carried out to compare the fuzzy self-tuning parameter PID control with the conventional PID control with constant parameters. © 2012 Praise Worthy Prize S.r.l. - All rights reserved.


Minav T.A.,Lappeenranta University of Technology | Filatov D.M.,Saint Petersburg State University | Laurila L.I.E.,Lappeenranta University of Technology | Pyrhonen J.J.,Institute of LUT Energy | Vtorov V.B.,Saint Petersburg State University
International Review on Modelling and Simulations | Year: 2011

Evaluation of an electro-hydraulic system of a working machine is carried out by a Matlab Simulink model. Modelling of the total forklift system is presented. Analysis and verification of the Simulink model with practical results are also performed for an internal gear and axial piston hydraulic machine drive. Practical results are presented to demonstrate the energy efficiency of the proposed electro-hydraulic forklift arrangement with potential energy recovery feature. © 2011 Praise Worthy Prize S.r.l. - All rights reserved.


Minav T.A.,Aalto University | Filatov D.,Saint Petersburg State University | Pyrhonen J.,Institute of LUT Energy | Pietola M.,Aalto University
International Review on Modelling and Simulations | Year: 2013

Evaluation of an electro-hydraulic system of a working machine is carried out by a Matlab Simulink model. Modelling of the total forklift system is presented. Analysis and verification of the Simulink model with practical results are also performed for an axial piston hydraulic machine drive. Practical results are presented to demonstrate the cycle energy efficiency of the proposed electro-hydraulic forklift arrangement with potential energy recovery feature. © 2013 Praise Worthy Prize S.r.l. - All rights reserved.


Roytta P.,Lappeenranta University of Technology | Polikarpova M.V.,Lappeenranta University of Technology | Nerg J.,LUT | Pyrhonen J.,Institute of LUT Energy
19th International Conference on Electrical Machines, ICEM 2010 | Year: 2010

Direct water cooling has been used only in large size turbo generators. The method might, however, offer interesting possibilities also in high torque applications. The performance of different cooling fluids for internal liquid cooling of windings is assessed. The arctic operating conditions of machine place special requirements for the fluid thus pure water can not be used for cooling. It is found that use of the anti-freezing substances studied decrease the performance of the cooling system. Fast computational model to asses these effects is proposed. ©2010 IEEE.


Minav T.A.,Lappeenranta University of Technology | Laurila L.I.E.,Lappeenranta University of Technology | Pyrhonen J.J.,Institute of LUT Energy
International Review of Automatic Control | Year: 2013

The purpose of this research is to utilize the excellent control capabilities of modern electric drives in electro-hydraulic systems such as forklifts, create direct drive position control for the forklift fork and verify the results by measurements. The drive consists of a Direct Torque Control (DTC) electric servo motor directly running a reversible hydraulic pump. The position of a hydraulic cylinder is controlled by a Permanent Magnet Synchronous Machine (PMSM) drive with a single feedback from motor rotor angle resolver. A fairly accurate lifting height sensorless control could be used e.g. as a base for a new automatic warehouse system. The system equipped with e.g. a simple proximity switch should be able to serve as an automated height control system for a warehouse. © 2013 Praise Worthy Prize S.r.l. - All rights reserved.


Minav T.A.,Institute of LUT Energy | Laurila L.I.E.,Lappeenranta University of Technology | Pyrhonen J.J.,Lappeenranta University of Technology
International Review of Automatic Control | Year: 2012

The purpose of this study is to evaluate the performance of an electro-hydraulic forklift system with a different number of fuzzy rules in its self-tuning-parameter fuzzy PID speed controller. The drive consists of a direct-torque-controlled (DTC) electric servo motor directly running a reversible hydraulic pump. A self-tuning-parameter fuzzy PID controller is designed to control the rotational speed of a permanent magnet synchronous machine (PMSM). Simulation of an electro-hydraulic system of a working machine is carried out by a Matlab Simulink model. Analysis and verification of the practical results are performed. Comparisons are made with a different number of fuzzy rules. © 2012 Praise Worthy Prize S.r.l. - All rights reserved.

Loading Institute of LUT Energy collaborators
Loading Institute of LUT Energy collaborators