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Read e-book online Advanced Electric Drives: Analysis, Control, and Modeling PDF

By Ned Mohan

ISBN-10: 1118485483

ISBN-13: 9781118485484

Complicated electrical Drives makes use of a physics-based method of clarify the elemental innovations of contemporary electrical force regulate and its operation less than dynamic conditions.
• Gives readers a “physical” photo of electrical machines and drives with out resorting to mathematical differences for simple visualization
• Confirms the physics-based research of electrical drives mathematically
• Provides readers with an research of electrical machines in a manner that may be simply interfaced to universal energy digital converters and regulated utilizing any keep an eye on scheme
• Makes the MATLAB/Simulink records utilized in examples on hand to somebody in an accompanying website
• Reinforces basics with a number of dialogue questions, notion quizzes, and homework difficulties

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Additional info for Advanced Electric Drives: Analysis, Control, and Modeling Using MATLAB / Simulink

Sample text

Assuming that there is no magnetic saturation, the resultant mmf distribution in the air gap due to all three phases at that instant can simply be represented, using vector addition, by the resultant space vector shown in Fig. 2-6b, where the subscript “s” represents the combined stator quantities: Fsa (t ) = Faa (t ) + Fba (t ) + Fca (t ). (2-20) The earlier explanation provides a physical basis for understanding space vectors. We should note that unlike phasors, space vectors are also applicable under dynamic conditions.

EXAMPLE 2-3 Verify the results in Example 2-2 by simulations in Simulink. Solution See the complete results, including the simulation files, in Appendix 2-B in the accompanying website. 2-10 SUMMARY In this chapter, we have briefly reviewed the sinusoidally distributed windings and then calculated their inductances for developing equations for induction machines in phase (a-b-c) quantities. The development of these equations is assisted by space vectors, which are briefly reviewed. The analysis in this chapter establishes the framework and the rationale for the dq windings-based analysis of induction machines under dynamic conditions carried out in the next chapter.

3-1), is (t ) = ia e− jθda + ib e− j (θda −2 π / 3) + ic e− j (θda −4 π / 3). (3-11) Equating the real and imaginary components on the right side of Eq. (3-11) to isd and isq in Eq. (3-4)  2π    4π   cosθda −  cos θda −    ia (t )  cos(θda )   isd (t )   2 3 3    =    ib (t ) ,   isq (t )   2π  4π   3 − sin(θda ) − sin θda −  − sin θda −   ic (t )      3 3  [Ts ]abc → dq (3-12) where [Ts]abc→dq is the transformation matrix to transform stator a-b-c phase winding currents to the corresponding dq winding currents.

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Advanced Electric Drives: Analysis, Control, and Modeling Using MATLAB / Simulink by Ned Mohan


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