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PhD position within Power electronics for fully-electric Work-Class Remotely Operated Vehicles (WROVs), (IE-041-2018)

The Faculty of Information Technology and Electrical Engineering (IE), http://www.ntnu.edu/ie at the Norwegian University of Science and Technology (NTNU), has a vacancy for a 100% position (3 years) as a PhD student at the Department of Electric Power Engineering (IEL), http://www.ntnu.edu/elkraft. The described PhD position is part of the research within the “High-Efficiency all-electric DC supply systems for subsea work-class remotely operated vehicles (HEROVs)” project. HEROVs is a joint research project between NTNU and two industrial partners: Argus Remote Systems AS based in Bergen Norway and Ingeteam Power Technology S.A. based in Bilbao Spain.


Information about the department of Electrical Power Engineering

Currently there are 12 Professors, 7 Associate Professors and 4 Lecturers at the Department of Electric Power Engineering. In addition, there are 4 Adjunct Professors, 2 Adjunct Associate Professors, 9 Postdoctoral researchers, 3 Researchers, about 35 PhD students, and 15 technical/administrative staff. Research activities are organized under two research groups: Power Systems Group and Power Technology Group. The department has a good laboratory infrastructure for research and education, as well as a mechanical workshop, supported by a technical staff of 10 persons.


The department has a wide range of teaching responsibilities, ranging from fundamental education in electric power engineering for other engineering students, Master’s programs in Energy and Environment, International MSc programs within Electric Power Engineering and Wind Energy, as well as PhD education and continuing education.


Work description

Remotely Operated Vehicles (ROVs) are currently used in multiple subsea and offshore activities. They are needed in the oil and gas sector (for intervention, trenching, umbilical and power cable laying, repair and maintenance tasks) as well as in other niche applications requiring subsea operations (e.g. military, forensics). Considering the steep increase in offshore wind farm installations, ROVs use is expected to increase in the ocean renewable energy sector, where extensive cable-based collection grids are required. The focus of HEROVs project is on work-class ROVs, which have power ratings exceeding 200 kVA and operating in water depths up to 11000 m.

Today, the state-of-the-art WROVs use hydraulic systems on board in order to meet the high power demands of their manipulators and propulsion. However, a trend towards modernizing WROVs by designing them as fully electric is clearly observed. This will enable higher reliability, reduced weight, improved efficiency and controllability, while the environmental risks associated with possible leakages from the hydraulic circuits will be eliminated.

The goal of HEROVs is to design, analyze and experimentally verify high-efficiency all-electric DC power supply systems for WROVs based on medium-voltage DC (MVDC) technology. In particular, within HEROVs both the design and optimization of the MVDC distribution grid and the design and optimization of power electronic converters employed on WROVs will be investigated.


Currently, there is one vacant PhD position available at NTNU within the field of “Power electronics for fully-electric Work-Class Remotely Operated Vehicles (WROVs).

The successful PhD candidate is expected to design and optimize novel power electronic converters for the future fully-electric WROVs. More specifically, the PhD candidate will investigate the power semiconductor requirements and performance including investigations of novel semiconductor materials (e.g. SiC), their control circuits and auxiliary systems. The PhD project will be implemented using theoretical investigations (simulations and numerical calculations) and advanced experimental validations of various MVDC power electronic converter prototypes under various operating conditions.



Applicants must hold a M.Sc. degree (or equivalent) within electrical engineering with a specialization in Power Electronics. Applicants with a laboratory experience on power electronics (design of power electronic converters prototypes, programming of FPGAs and DSPs etc.) will be preferred. Scientific publications in international journals and conferences are merited.


Applicants are required to submit a one-page research proposal within the proposed research area.


The ability to work in team and good communication skills will be emphasized in the employment process.


The PhD position is expected to start in May 2018.

Language requirements

Applicants who do not master a Scandinavian language must provide evidence of good English language skills, written and spoken. The following tests can be used as such documentation: TOEFL, IELTS and Cambridge Certificate in Advanced English (CAE) or Cambridge Certificate of Proficiency in English (CPE). Minimum scores are:


TOEFL: 600 (paper-based test), 92 (Internet-based test)

IELTS: 6.5, with no section lower than 5.5 (only Academic IELTS test accepted)

CAE/CPE: grade B or A.


Formal regulations for PhD

Appointments are made in accordance with the regulations in force regarding terms of employment for PhD candidates issued by the Ministry of Education and Research, with relevant parts of the additional guidelines for appointment as a PhD candidate at NTNU. Applicants must undertake to participate in an organized PhD programme of study during their period of employment. The person who is appointed must comply with the conditions that apply at any time to employees in the public sector. In addition, a contract will be signed regarding the period of employment.


Applicants must be qualified for admission as PhD students at NTNU. See https://www.ntnu.edu/ie/research/phd for information about PhD studies at NTNU.



We can offer

  • an informal and friendly workplace with dedicated colleagues

  • academic challenges

  • attractive schemes for housing loan, insurance and pension in the Norwegian Public Service Pension Fund


High motivation and good analytical and communication skills will be emphasized in the employment process.


Diversity is important to achieve a good, inclusive working environment. We encourage all qualified applicants to apply, regardless of gender, disability, and cultural background. NTNU wishes to increase the number of women in its workforce, and women are specifically encouraged to apply.


The appointment is to be made in accordance with the regulations for State Employees and Civil Servants in Norway. The candidate must adhere to regulations that concern changes and developments within the discipline and/or the organizational changes concerning activities at NTNU.


Under Section 25 of the Freedom of Information Act, information about the applicant may be made public even if the applicant has requested not to have her/his name entered on the list of applicants. 


Further information can be obtained from:

Associate Professor Dimosthenis Peftitsis, dimosthenis.peftitsis@ntnu.no


Salary conditions

The PhD position is in code 1017 Research fellow, and is remunerated at a gross NOK 436 900 – 537 700 per year, depending on qualifications. A deduction of 2% is made as a statutory contribution to the Norwegian Public Service Pension Fund.


Requirements for the application

Applications are to be submitted electronically through this page (http://www.jobbnorge.no).


The application should contain (all in one combined PDF file):

  • A one-page research proposal within the proposed research area.

  • CV.

  • Certified copies of academic diplomas and certificates.

  • Applicants from universities outside Norway are kindly requested to send a diploma supplement or a similar document, which describes in detail the study and grading system and the rights for further studies associated with the obtained degree.

  • Publications relevant to the research scope and any other work which the applicant wishes to be taken into account should clearly state the applicant’s contribution. A short summary should be attached outlining the applicant’s input to joint work.

  • List of scientific publications.

  • Names and contact information of at least two references.


Incomplete applications will not be taken into consideration.


Please mark your application with the correct IE-number: IE-041-2018


Deadline for applications: March 31, 2018.


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  • Søknadsfrist
    31. mars 2018
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    NTNU - Norwegian University of Science and Technology
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