publication . Doctoral thesis . 2009

Strategies to improve the performance of three-phase induction motor driven systems

Ferreira, Fernando José Teixeira Estêvão;
Open Access English
  • Published: 21 Jan 2009
  • Country: Portugal
Tese de doutoramento em Engenharia Electrotécnica (Sistemas de Energia) apresentada à Fac. de Ciências e Tecnologia da Universidade de Coimbra Electric motor driven systems (EMODS) account for over 40% of global electrical energy demand, i.e., 7400 TWh per year, and for about 70% of the demand for industrial electrical energy, being by far the most important electrical load. Furthermore, EMODS offer today large efficiency improvement potential, on average within 20% to 30%. If the energy saving potential associated with EMODS becomes effective, the consumption of a huge amount of fossil fuels can be avoided. The greenhouse gas emissions can significantly be redu...
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Doctoral thesis . 2009
132 references, page 1 of 9

2.3 Mt/yr, assuming that 2 3 of the motors in operation are repaired [24], [25], [26], [33], [50].

In 2000, the EU-15 electricity use in Industry was about 80, 100, 212 and 222 TWh/yr for B. Deduction of Equations (A4.8), (A4.9), and (A4.10) Equation (A4.8) is obtained as follows. Assuming (1), (2) and (3), one can write (4).

Fig. 20. Common-mode voltage (summation of phase-to-ground voltages divided by 3), (CDC = 25000 μF; f1 = 40 Hz; ma = 0.95).

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[12] IEC 61800-2, 1998: “Adjustable speed electrical power drive systems - Part 2: General requirements - Rating specifications for low voltage adjustable frequency a.c. power drive systems”.

[13] Chapman, S.: “Electric Machinery Fundamentals”, 4th Edition, McGraw-Hill, New York, 2004.

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132 references, page 1 of 9
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