People
Ing. Ondřej Zoubek, Ph.D.

Ing. Jiří Zděnek, CSc.; Ing. Ondřej Zoubek, Ph.D.

For transmission of maximal tractive effort between wheels and rails it is needed to utilize an adhesion. Therefore it is needed to equip every railway traction vehicle by a slip controller that enables to utilize the adhesion and transmit the required tractive effort. The slip controller enables wear of wheels and rails to decrease, mechanical stress decreasing and mechanical shocks elimination when the slip controller works properly. The slip controller could be divided into two parts. Firs part detects value of the slip and second is a control algorithm. The control algorithm control value of the slip. Both parts have to work together. But the parts could be designed separately. This project is deals with the first part of the controller. The controller is intended for locomotive with DC motors. Design of the controller first part is difficult because the design requires knowledge from three disciplines: electric drive control, torque transmission from motor to wheels and force transmission from wheels to rails. Therefore the project deals with design of the first part controller which it is possible to supplement by the second part of the controller and program it into locomotive computer.

Department of Electric Drives and Traction

2015 - 2015

Studentská grantová soutěž ČVUT - SGS15/079/OHK3/1T/13

Ing. Jiří Zděnek, CSc.; Ing. Ondřej Zoubek, Ph.D.

Rail traction vehicles transit tractive force between wheels and rail thought a small contact area. Adhesive coefficient describes parameters of the area. The coefficient depends on many parameters. One of the parameters is slip velocity. When the slip velocity is increased the coefficient is increased too. When the slip velocity reaches a certain value the coefficient is begins to decrease. There are many more or less usable methods for slip control. The grant proposal is Design of Locomotive slip controller algorithm. The algorithm is based on comparing of changes of acceleration and tractive force. The changes will be evaluated by train model. The model will be determined if the tracitve force has maximal value.

Department of Electric Drives and Traction

2013 - 2014

Studentská grantová soutěž ČVUT - SGS13/136/OHK3/2T/13

Ing. Petr Pichlík, Ph.D.; Ing. Jiří Zděnek, CSc.

In recent time is significantly increasing number of applications which are utilizing modern regulated electrical drives. The project aims to develop an experimental measurement workspace which would be capable of characterization of dynamic and static properties of modern electric drives including those which can run from zero rpm. Workspace would be conceived as two rotating machines with their schaft coupled together. The tested drive should be exchangeable. The breaking rotary machine would be connected to semiconductor inverter and would be capable of working in all four quadrants (both drive and brake torque) and inverter would allow to return power to mains grid. The grant resources would be used to design and construct one complete workspace. This includes development of semiconductor inverters with possibility to brake and return excess power to the mains. Management, monitoring, recording and evaluating system for the PC would be created. Emphasized would be ease of use and s

Department of Electric Drives and Traction

2011 - 2012

Studentská grantová soutěž ČVUT - SGS11/120/OHK3/2T/13