Alternative traction system for road-rail vehicles
(2023) MMKM05 20221Innovation
- Abstract
- Excavators have traditionally been diesel driven with hydraulic actuators, but with the ongoing electrification of vehicles, smaller electric excavators are getting more common. Larger electrical excavators are still in a prototyping or early production stage but can be expected to grow. The electrification of construction equipment creates new possibilities to replace previous hydraulic- with electric actuators. This thesis covers the product development of an electric tractive system for a road-rail excavator using Ulrich and Eppinger ́s method for product development. Current hydraulic actuators have different speed, torque and size characteristics while following other safety regulations compared to electrical motors. These differences... (More)
- Excavators have traditionally been diesel driven with hydraulic actuators, but with the ongoing electrification of vehicles, smaller electric excavators are getting more common. Larger electrical excavators are still in a prototyping or early production stage but can be expected to grow. The electrification of construction equipment creates new possibilities to replace previous hydraulic- with electric actuators. This thesis covers the product development of an electric tractive system for a road-rail excavator using Ulrich and Eppinger ́s method for product development. Current hydraulic actuators have different speed, torque and size characteristics while following other safety regulations compared to electrical motors. These differences create the need for a product development project to investigate potential problems and possibilities in the change from a hydraulic- to electric tractive system.
The project was made at CE Engineering Solutions (CEES). Different technical standards were studied to simplify a possible CE-marking of the product and the
technical specifications were set using comparative data from competitors as well as data and knowledge from previous projects within CEES. The solutions were
restricted to the use of components available today in small order quantities since the initial target was building and verification of a prototype. In the thesis, multiple concepts were generated and three different concepts with two different working principles are presented more in detail. A final solution was selected by concept scoring with weight factors decided together with CEES. The final solution consists of a single motor, inverter, and reduction gear per
wheel axle due to cost efficiency, differing from the more recent solutions at CEES with two independent motors per axle. The limitation of using “off the
shelf” products available today resulted in a solution using an industry standard gearbox not fully adapted for the high-speed electrical motors often used in mobile applications, restricting the traction performance but resulting in a more cost-effective solution. (Less) - Popular Abstract (Swedish)
- Tänk om vi kunde ersätta dagens hydrauliska lösningar med elektriska och skapa mer energieffektiva system i dagens moderna arbetsmaskiner? Vilka möjligheter och utmaningar uppstår då man ersätter pumpar och hydraulik med batterier och elektronik?
Den pågående elektrifieringen av fordon inom många sektorer skapar nya möjligheter att utmana och ersätta traditionella lösningar med hjälp av modern teknik. I detta examensarbete har Jakob Runevad i ett arbete inom produktutveckling tillsammans med CE Engineering Solutions undersökt möjligheten att ersätta en traditionell hydraulisk drivlina med en elektrisk. Den högre energieffektiviteten för en elektrisk drivlina skulle kunna bli en viktigare faktor i framtiden då batterielektriska maskiner... (More) - Tänk om vi kunde ersätta dagens hydrauliska lösningar med elektriska och skapa mer energieffektiva system i dagens moderna arbetsmaskiner? Vilka möjligheter och utmaningar uppstår då man ersätter pumpar och hydraulik med batterier och elektronik?
Den pågående elektrifieringen av fordon inom många sektorer skapar nya möjligheter att utmana och ersätta traditionella lösningar med hjälp av modern teknik. I detta examensarbete har Jakob Runevad i ett arbete inom produktutveckling tillsammans med CE Engineering Solutions undersökt möjligheten att ersätta en traditionell hydraulisk drivlina med en elektrisk. Den högre energieffektiviteten för en elektrisk drivlina skulle kunna bli en viktigare faktor i framtiden då batterielektriska maskiner tvingas hushålla med energin i större utsträckning än dagens fossildrivna.
Syftet med arbetet var att i ett tidigt skede upptäcka möjligheter och problem som den nya tekniken innebär. Att uppfylla likvärdig prestanda och krav visade sig vara en utmaning då arbetet begränsades till produkter tillgängliga idag utan större modifieringar.
Från ett antal olika koncept mynnade arbetet ut i en lösning med en kompromiss mellan prestanda och pris genom att beprövade komponenter, främst utvecklade för industrisammanhang, kombinerades med motorer utvecklade för elektriska fordon. Trots att komponenterna inte till fullo harmoniserade gällande hastighet och varvtal uppfyllde lösningen i sin helhet de uppsatta kraven för att prestandamässigt kunna jämföras med dagens hydrauliska lösningar.
Arbetet resulterade inte i någon färdig produkt utan kan anses utgöra en grund där flera koncept och lösningar med olika typer av drivlinor presenteras och utvärderas. Den slutgiltiga lösningen är beskriven mer i detalj med principiell design och komponentval och kan fungera som en bas för framtagning av en färdig prototyp utifrån teknik och produkter tillgängligt idag. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9124031
- author
- Runevad, Jakob LU
- supervisor
- organization
- course
- MMKM05 20221
- year
- 2023
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- Product development, electric traction, construction equipment, road-rail vehicles.
- language
- English
- id
- 9124031
- date added to LUP
- 2023-06-14 10:36:17
- date last changed
- 2023-06-14 10:36:17
@misc{9124031,
abstract = {{Excavators have traditionally been diesel driven with hydraulic actuators, but with the ongoing electrification of vehicles, smaller electric excavators are getting more common. Larger electrical excavators are still in a prototyping or early production stage but can be expected to grow. The electrification of construction equipment creates new possibilities to replace previous hydraulic- with electric actuators. This thesis covers the product development of an electric tractive system for a road-rail excavator using Ulrich and Eppinger ́s method for product development. Current hydraulic actuators have different speed, torque and size characteristics while following other safety regulations compared to electrical motors. These differences create the need for a product development project to investigate potential problems and possibilities in the change from a hydraulic- to electric tractive system.
The project was made at CE Engineering Solutions (CEES). Different technical standards were studied to simplify a possible CE-marking of the product and the
technical specifications were set using comparative data from competitors as well as data and knowledge from previous projects within CEES. The solutions were
restricted to the use of components available today in small order quantities since the initial target was building and verification of a prototype. In the thesis, multiple concepts were generated and three different concepts with two different working principles are presented more in detail. A final solution was selected by concept scoring with weight factors decided together with CEES. The final solution consists of a single motor, inverter, and reduction gear per
wheel axle due to cost efficiency, differing from the more recent solutions at CEES with two independent motors per axle. The limitation of using “off the
shelf” products available today resulted in a solution using an industry standard gearbox not fully adapted for the high-speed electrical motors often used in mobile applications, restricting the traction performance but resulting in a more cost-effective solution.}},
author = {{Runevad, Jakob}},
language = {{eng}},
note = {{Student Paper}},
title = {{Alternative traction system for road-rail vehicles}},
year = {{2023}},
}