Profile
The tasks of working group “Explosion Protected Electrical Drive Systems“ comprise testing and assessment of electrical drives and complete drive systems as well as protection equipment required for safe operation of explosion protected electrical machines (ATEX and IECEx) including research relating to this range of topics.
Here, another aspect is the thermal evaluation of enclosures with built-in components such as control units used in potentially explosive atmospheres.
Another important focus is put on new research topics concerning all aspects of electrical drive technology performed in cooperation with universities and companies.
Furthermore, technical guidance for users of explosion protected drives is another element in the range of tasks of this working group. For detailled information concerning our range of tasks please refer to the respective websites.
Research/Development
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Aktuelle Forschungsvorhaben
- Ignitability of partial discharges on high voltage windings
F. Lienesch, U. Dreger, M. Hilbert - Efficiency determination on electrical machines
C. Lehrmann, U. Dreger, F. Lienesch - Frequency converter supplied drives designed to “Increased Safety“ type of protection
C. Lehrmann - Advance calculation of the heating of electrical machines in locked state using the
finite-element method
U. Dreger - Permanent-magnet synchronous machines with regard to explosion protection
C. Lehrmann, N, Yogal - Characterization of magnet materials for the application in permanent-magnet
synchronous machines
N. Yogal - Cooperation in the EMPIR-Projekt
19ENG08 WindEFCY "Traceable mechanical and electrical power measurement for efficiency determination of wind turbines"
C. Lehrmann, N. Yogal
Services
Service
- Examination of electrical drives according to ATEX-Directive 2014/34/EU or within the scope of the IECEx-scheme
- Examination of monitoring equipment according to Directive 2014/34/EU
- Manufacturer auditing (QM-audit) according to ATEX-Directive 2014/34/EU
- Technical guidance for manufacturers and users of explosion protected products
Information
Current publications
Publication single view
Unknown
| Title: | Die Messunsicherheit bei der Wirkungsgradmessung an permanentmagneterregten Synchronmaschinen - ein Vergleich des direkten und indirekten Messverfahrens |
|---|---|
| Author(s): | C. Lehrmann and N. Yogal |
| Journal: | PTB- Bericht |
| Year: | 2019 |
| Month: | September |
| Volume: | Ex-10 |
| Series: | PTB Bericht |
| Pages: | 9 - 21 |
| Fachverlag NW | |
| Publisher address: | Bremen |
| Event name: | 306. PTB-Seminar |
| Braunschweig | |
| Event date: | 18.01.2018 |
| File URL: | file:261458 |
| Abstract: | Im Rahmen dieses Beitrages werden die indirekte Bestimmung des Wirkungsgrades über das Einzelverlustverfahren und die direkte Wirkungsgradbestimmung an einer permanentmagneterregten Synchronmaschine der Bemessungsleistung 7,5 kW mit Oberflächenmagneten verglichen. Hierbei wurde gemäß des „Guide of the uncertainty of measurement” /1/ eine detaillierte Messunsicherheitsanalyse durchgeführt und die Ergebnisse gegenübergestellt und bewertet. |