Študija izvedljivosti gorske kosilnice v tehnologiji brez emisij

Brežan, Klemen (author), Jenko, Marjan (mentor), Benedičič, Janez (co-mentor)

Narejena je študija izvedljivosti gorske kosilnice v tehnologiji brez emisij. Osredotočili smo se na iskanje ekološke rešitve z uporabo primernega elektromotorja, ki naj nadomesti motor z notranjim izgorevanjem. Z izračuni smo določili potrebno moč motorja in kapaciteto baterijskega sklopa. Predstavljene so motorne osnove in delovanje motorjev, ki so primerni za uporabo v gorskih kosilnicah. Prišli smo do zaključka, da je zaradi svojih karakteristik najbolj primeren brezkrtačni motor s trajnimi magneti na enosmerno napajanje (ang. PM brushless DC motor), saj deluje sinhrono in ga krmilimo enostavneje od druge izbrane alternative, ki je sinhroni motor s trajnimi magneti (ang. PMSM-Permanent magnet synchronous motor). V študiji smo določili potrebne karakteristike pogona, se seznanili z delovanjem različnih izvedb in karakteristik elektromotorjev, izbrali najprimernejši izvedbi - vrsti elektromotorja, ustrezni izvedbi krmilnika motorja in potrebno kapaciteto baterijskega sklopa. Konkretno dimenzioniranega elektromotorja, ki bi popolnoma ustrezal našim zahtevam, sodeč po pregledu na spletu in po pogovorih z inženirji za razvoj elektromotornih pogonov, na trgu še ni. Tehnično in tehnološko pa je optimizacija motorja in motornega krmilnika za gorsko kosilnico možno izdelati. Sledil bo ekonomski del študije izvedljivosti, katerega jedro bo skupaj z inženiringom proizvajalcev določiti stroške razvoja specificiranega motorja do maloserijske proizvodnje.

• Language: Slovenian
• Keywords: gorska kosilnica, osnove elektromotorjev, krmilniki, brezkrtačni motor s trajnimi magneti na enosmerno napajanje, sinhroni motor s trajnimi magneti-SMTM
• Work type: Bachelor thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2018
• PID: 20.500.12556/RUL-99900
• Publication date in RUL: 20.02.2018

Secondary language

• Language: English
• Title: Design of walk-behind tractor without wmissions - feasibility study

Abstract

A feasibility study for walk-behind tractor without emission was carried out. We focused on finding an ecological solution using a suitable electric motor to replace the internal combustion engine. The calculations determined the required power of the electric engine and the capacity of the battery pack. The electric motor fundamentals and operation of engines suitable for use in walk behind mowers are presented. We have come to the conclusion that because of its characteristics, the brushless motor with permanent magnets on the DC current (PM brushless DC motor) is most suitable because of its characteristics. It works synchronously. Its' control is simpler than other alternative, which is a synchronous constant-magnet motor (PMSM-permanent magnetic synchronous motor). In the study, we determined the required drive characteristics, we familiarized ourselves with the operation of different versions and characteristics of electric motors, selected the most suitable versions - the type of electric motor, the corresponding controller and the required capacity of the battery pack. A specially sized electric motor that fully complies with our requirements, after a web survey and after discussions with engineers for the development of electric motors, is not yet available on the market. Technically and technologically, the optimization of the electric motor and the motor controller for a walk-behind mower can be made. The economy part of the feasibility study will follow. It will be performed in cooperation with sales and engineering departments of the producers. It will give the cost of developing a particular electric motor for a small-scale production.

• Keywords: walk-behind tractor, walk-behind lawn mower, electric motors, motor controller, brushless DC motor with permanent magnets, permanent magnet synchronous motor - PMSM