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FEL-BUGGY - electric car
Department of Electric Drives and Traction, Technická 2, 166 27 Praha 6
http://motor.feld.cvut.cz/
Who are we?
Project manager: Ing. Vít Hlinovský, CSc.
Deputy project manager: Ing. Jan Bradna
Programmers of the control units: Ing. Petr Sýkora, Ing. Jan Bauer
Auxiliary circuits - test driver: Bc. Zdeněk Houf
Students involved in project: Viktor Borodin, Vojtěch Čech, Dominik Macko, Jakub Nohejl
Mechanics: Zdeněk Šabat, Milan Humr
What research are we doing?
Design of an electric drive for light-weight electric car
There has been a big boom in the world of electric cars recently and the Department of Electric Drives and Traction at CUT FEE in Prague can't stay aside so our team tries to design a main drive for electric car and a lot of other auxiliary circuits for modern vehicles. Two independent electric engines were designed as a drive for this light-weight electric car. These engines are used just for rear-wheel drive and they are not connected by differential. Rear wheels are controlled just electronically. Two basic engines (PMS 100 - Permanenterregter Synchromotor) were bought and tested from company PERM MOTOR (Member of the HEINZMANN Group). While making a decision about which type of electric engine should be used, there had to be considered a few criteria such as availability, motor characteristics, energy requirements and especially battery use and their length of lifetime. The goal of this experiment is to find out if the designed drive is suitable for the car and to learn how to control it so the two independent engines can replace the use of the differential.
- Construction of a drive by using two independent electric engines
For a realization of project of light-weight electric car there has been chosen and bought a prototype of a small commercial vehicle of type BUGGY from HAVEL company (lead by well known designer and autocross racer in Czech Republic from the 90s). A rear drive axle was designed and constructed in the labs of CUT FEE.
Rear axle after adjustment
The used electric engines PMS 100 have operating revolutions between 1000-6000 r/min so for their use there had to be a planetary gearbox built in with a ratio of 1/6.75 and a toothed belt 1 / 2.77. The total gear ratio is 1 / 18.7.
- Control units for electric engines
AC DRIVE unit was chosen as a power supply for electric engines which can be used for drives of small electric vehicles or some other interesting applications for instance a golf carts, wheelchairs or ship propulsion. AC Drive is produced in two versions 24/36V and 48V and for performances up to 15 kW. AC Drive is small, effective and it offers a great performance for a lot of different applications. The control unit of a modern conception with digital control and adjustment of regulator parameters is realized with a CAN-open bus.
- Auxiliary circuits for driving the electric car
Auxiliary circuits are necessary to ensure an easy handling and safety. The main power inverters of drive units are able to automatically turn on their power supply. There are placed both main safety components and main detachable components in circuits. The control is realized on a dashboard and on a main distribution cabinet too. Part of auxiliary circuits is also a battery charging system from a distribution system 230 V.
- Dashboard of an electric car
There are main control safety components on a dashboard - switch with a key which blocks components of the main inverters. Then there is a panel of a PLC system where actual operating values are shown - speed, power current, battery voltage and temperature of inverters.
What is it good for?
The first real electric car ever realized at CTU FEE
The project of electric car should help in development and design of a race car "formula-student electric". In this project we try to cooperate with a Faculty of Mechanical Engineering, where a team of students and younger teachers has been created in order to take part in a worldwide competition Formula Student. Teams of students and teachers from 420 technical universities are participating in this competition in these days. In 2011 a team of students who are interested in this type of drive was created and with help of experience from a former generation race car from Faculty of Mechanical engineering they built a new race car model ".formula-student electric" and they are preparing to take part in the international races in Europe http://www.formulastudentelectric.de/. The whole project is funded by grants and financial support from sponsors and their donations.
Who is funding our research?
Electric car is funded outside of a budget of the department, by grants and financial and material donations.
SGS 10/164/OHK3/2T/13 - student grant competition - Ing. Petr Sýkora - drive unit
Material donations
PHOENIX - ZEPPELIN CAT - financial support of a BUGGY vehicle purchase and donation of batteries 48V / 190Ah
PEG s.r.o. - financial and material support of rear axle reconstruction
SCHMACHTL CZ spol s r.o. - donated control system PLC - dashboard
ELGO-ELECTRIC spol s r.o. - support of an onboard electric devices
Who are we cooperating with?
Formula Student/SAE Team - Czech technical university in Prague
http://www.cartech.cvut.cz/
