Utjecaj direktnih pogona na strukturu pogonskih mehanizama

doctoral thesis

• Title (english): Influence of direct drive on structure of drive mechanisms
• Author: Milan Kostelac
• Mentor: Dragutin Ščap (mentor)
• Committee member: Milan Opalić (predsjednik povjerenstva)
• Committee member: Dragutin Ščap (član povjerenstva)
• Committee member: Zlatko Maljković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2006-07-20, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering
• Universal decimal classification (UDC): 62 - Engineering. Technology in general ; 621.3 - Electrical engineering

Abstract

Napredak tehnologije, s primjenom u gradnji pogonskih motora i sustava upravljanja, omogućava danas velike promjene u oblikovanju pogonskih mehanizama tehničkih sustava. Neposredno povezivanje pogonskog motora i radnog člana mehanizma, bez mehaničkog prijenosnika kao posrednika, stoljetni je san vizionara u strojarstvu. U radu su istražene moguće izvedbe direktnih pogona i njihov utjecaj na opći oblik pogonskih mehanizama tehničkih sustava. Predloženim oblikovanjem visokomomentnog motora željela se pronaći univerzalna izvedba sa širim spektrom primjene u pogonskim mehanizmima. Provedena su istraživanja troškova u razvoju direktnih pogona, te su predložene smjernice za sniženja tih troškova. Raščlambom strukture direktnog pogona postavljeni su principi oblikovanja pojedinih parcijalnih funkcija i definiran njihov utjecaj na sustav pogonskog mehanizma. Sintezom tehničke funkcije, strukture i veze s okolinom utvrđena je metoda preciznog definiranja pogona za određene namjene u tehničkim sustavima. Pored istraženih i predloženih struktura pogonskih mehanizama s direktnim pogonom, u okviru rada je razvijen direktni pogon eksperimentalnog vozila, ugrađen u pogonski kotač standardnih dimenzija. Na direktnom pogonu eksperimentalnog vozila provedeni su eksperimenti s kontrolnim mjerenjima, a dobiveni rezultati potvrdili su njegovu primjenjivost i brojne visoke pogonske performanse (visoki moment vrtnje u širokom rasponu brzina, brzi odziv, zadovoljavajuću valovitost momenta vrtnje) takvih pogona u odnosu na klasične pogonske sustave. Istraživanjem značajki novog pogonskog sustava s direktnim pogonom postavljeni su kriteriji, mjerila i pravila oblikovanja tog sustava, čime je stvorena i neophodna baza znanja za kreiranje tog sustava.

Abstract (english)

The advances in technology of drive motor design and related control systems result in extensive changes in the design of drive mechanisms in various technical systems. Direct interconnection of the driving motor and the working parts of the mechanism, without any mechanical transmission, has always been a dream of visionaries in the field of mechanical engineering. This thesis explores the possible implementations of direct drives and their impact on the general drive mechanism designs in technical systems. A design approach utilizing the high-torque electric motor was proposed in order to find a universal implementation concept which would be characterized by a broad spectrum of possible applications in drive mechanisms. The cost-benefit analysis of the direct drive development has been carried out, and the guidelines for cost reduction have been proposed. The structure of direct drive has been analyzed, thus forming the principles of the individual partial functions. This has defined their influence on the driving mechanism systems. The design of the technical functionality, structure and interface with the environment has been carried out. It has formed a method of precise defining of the drive for the specific objective in technical systems. Apart from the explored and proposed driving mechanism structures utilizing the direct drive, this thesis comprises the development of a direct drive for an experimental electrical vehicle. The direct drive is built in the vehicle’s front wheel with standard dimensions for automotive purposes. The drive identification experiments have been carried out, and the obtained results have confirmed its practical applicability and numerous high performance qualities (i.e. high motor torque within a relatively wide speed range, fast torque response, and low magnitude of torque ripple) of such drives compared to conventional drive systems. By examining the characteristics of the novel drive system based on the direct drive, the appropriate criteria and rules have been set up for the design of such system, thus creating an expert knowledge base for the design of future similar systems.

• Keywords: pogonski mehanizam; motor; direktni pogon; visoki moment vrtnje; pogon s niskim brzinama vrtnje
• Keywords (english): drive mechanism; motor; direct drive; high motor torque; low-speed drive
• Language: croatian
• URN:NBN: urn:nbn:hr:235:039811
• Study programme: Title: Mechanical Engineering and Naval Architecture; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje tehničkih znanosti (doktor/doktorica znanosti, područje tehničkih znanosti)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-12-04 11:56:56