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VelOn - The detachable bicycle motor
KTH, School of Industrial Engineering and Management (ITM).
KTH, School of Industrial Engineering and Management (ITM).
2019 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
VelOn - Den avtagbara elcykelmotorn (Swedish)
Abstract [en]

Electric bikes have become a popular means of transportation over the years. This report examined whether or not it is plausible to upgrade old bicycles to electrical bikes, thereby, using the already existing bicycles and avoiding the need of unnecessary manufacturing.

A prototype of the mountable motor was designed and manufactured. The device consisted of two units, a mounting unit and a motor unit. A controller was connected to the motor and could be placed on the handlebar. The controller both enabled control and monitoring of the power given to the motor.

The prototype’s durability, potential velocity and control system were tested to answer the research questions and give recommendation to further developments of the project.

No major malfunctions were found in the construction after testing. For a voltage of 12V and a payload of 22kg, the bicycle obtained a top speed about 3m/s. The control system gave a smooth transition between velocities with hardly any noise to the signals.

Abstract [sv]

Den elektriska cykeln har under åren blivit ett populärt transportmedel. Denna rapport kommer att undersöka huruvida det är rimligt att uppgradera traditionella cyklar till elcyklar. Istället för att nyproducera elcykelramar kan redan befintliga cyklar användas.

En prototyp av en monterbar och avtagbar cykelmotor byggdes. Prototypen bestod av två enheter, en infästningsenhet och en motorenhet. Motorenheten var kopplad till ett kontrollsystem som gick att fästa på styret. Via kontrollsystemet kunde man både kontrollera och övervaka effekten från motorn.

Prototypens tålighet, potentiella hastighet och kontrollsystem testades för att besvara forskningsfrågorna och lägga en grund för vidareutveckling av konceptet.

Det hittades inga allvarliga brister eller skador av konstruktionen efter testerna. Vid en motorspänning på 12V och en last på 22kg så nåddes en maxhastighet på lite över 3m/s. Kontrollsystemet gav en jämn övergång mellan de olika hastigheterna, utan påverkande brus i signalerna.

Place, publisher, year, edition, pages
2019. , p. 62
Series
TRITA-ITM-EX ; 2019:27
Keywords [en]
Mechatronics, Personal transportation, Electrical bicycle, Sustainability.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-264503OAI: oai:DiVA.org:kth-264503DiVA, id: diva2:1373882
Supervisors
Examiners
Available from: 2019-11-28 Created: 2019-11-28 Last updated: 2019-11-28Bibliographically approved

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