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Lecturer(s)
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Peřina Ivan, Ing. Ph.D.
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Nemová 16 Jiří, doc. Ing. Ph.D.
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Novák Miloš, Ing.
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Course content
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1) Operating modes of electrical machines 2) Losses and efficiency of electric machines, generation of heat loss and its location. 3) Parasitic phenomena - skin effect, additional losses, machine asymmetry. 4) Fundamentals of ventilation calculation of electric machines 5) Electrical machines ventilation, hydraulic circuits, pressure sources, pressure drops 6) Hydraulic circuits, methods of solution of ventilation of electric machines - analogy of electrical circuits 7) CFD - modern calculation methods 8) Basics of thermal calculations of electric machines 9) Thermal circuit, heat sources, thermal resistances, interface conditions 10) Replacement heat circuit, assembly of networks, - analogy of electrical circuits 11) Alternative warm electric circuit in transient state 12) Specifics of thermal calculations of various types of electrical machines, interconnection with ventilation calculation 13) Modern calculation methods
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Learning activities and teaching methods
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Laboratory work, Lecture
- Graduate study programme term essay (40-50)
- 40 hours per semester
- Contact hours
- 65 hours per semester
- Preparation for an examination (30-60)
- 30 hours per semester
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| prerequisite |
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| Knowledge |
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| knowledge of the electrical machine |
| design of electrical machines |
| describe the design of the electrical machine |
| Skills |
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| apply fundamental mathematical operations |
| solve sets of equations with multiple variables |
| solve electrical circuits |
| learning outcomes |
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| Knowledge |
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| describe heat sources in thermal circuits |
| explain the mechanism of heat transfer inside of the machine |
| control the relations necessary for calculation of thermal circuit |
| describe ventilation circuits of electric machines |
| explain the mechanism of fluid flow inside of the machine |
| control the relations necessary for calculations of ventilation circuit |
| Skills |
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| determine the heat generated inside of given part of the machine |
| calculate the thermal conductivity of each part of the machine |
| calculate the temperature rise of the machine |
| determine the presure loss of the ventilation circuit of the machine |
| calculate the pressure situation in the ventilation circuit of the machine |
| teaching methods |
|---|
| Knowledge |
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| Lecture |
| Practicum |
| Individual study |
| Skills |
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| Lecture |
| Practicum |
| Individual study |
| assessment methods |
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| Knowledge |
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| Combined exam |
| Skills |
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| Seminar work |
| Project |
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Recommended literature
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Hak, Josef; Ošlejšek, Oldřich. Výpočet chlazení elektrických strojů. 1. díl : fyzikální podklady výpočtu chlazení a ventilační výpočet. Vyd. 1. Výzkumný a vývojový ústav elektrických strojů točivýchBrno, 1973.
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Juha Pyrhönen, Tapani Jokinen, Valéria Hrabovcová. Design of rotating electrical machines. Chichester, 2014. ISBN 978-1-118-58157-5.
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List, Vladimír; Hak, Josef. Elektrotechnika II : elektrické stroje. Část 1. 3. přeprac. vyd. Praha : SNTL, 1969.
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Marius Rosu, et. al. Multiphysics Simulation by Design for Electrical Machines, Power Electronics and Drives. Piscataway, USA, 2018. ISBN 978-1-119-10344-8.
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Ondruška, Emil; Maloušek, Antonín. Ventilace a chlazení elektrických strojů točivých. Vyd. 1. Praha : SNTL, 1985.
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Upadhyay, K. G. Design of electrical machines. New Delhi : New Age International Limited Publishers, 2008. ISBN 978-81-224-2282-5.
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