By Ned Mohan
Complicated electrical Drives makes use of a physics-based method of clarify the elemental techniques of contemporary electrical force keep an eye on and its operation lower than dynamic conditions.
• Gives readers a “physical” photograph of electrical machines and drives with out resorting to mathematical variations for simple visualization
• Confirms the physics-based research of electrical drives mathematically
• Provides readers with an research of electrical machines in a fashion that may be simply interfaced to universal energy digital converters and regulated utilizing any keep an eye on scheme
• Makes the MATLAB/Simulink documents utilized in examples to be had to somebody in an accompanying website
• Reinforces basics with numerous dialogue questions, proposal quizzes, and homework difficulties
Read Online or Download Advanced Electric Drives: Analysis, Control, and Modeling Using MATLAB / Simulink PDF
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Классическая, по праву считающаяся одной из лучших, книга по разработке импульсных источников питания.
Смело может быть рекомендована на роль настольной книги инженера.
Содержит массу примеров расчётов, без излишнего теоретизирования.
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Additional resources for Advanced Electric Drives: Analysis, Control, and Modeling Using MATLAB / Simulink
3-1 depends on the instantaneous values of phase currents and is independent of the choice of the reference axis to draw it. In the previous course for analyzing ac machines under balanced sinusoidal steady-state conditions, we replaced the three windings by a single hypothetical equivalent winding that produced the same mmf distribution in the air gap. This single winding was sinusoidally distributed with the same number of turns Ns (as any phase winding), with its magnetic axis along the stator current space vector and a current Ȋs (peak value of is ) flowing through it.
3-10) Substituting for isa from Eq. (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 cosθda − 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.
2-36) and The flux linkage equations in the above form clearly show their dependence on the rotor position θm for given values of the stator and the rotor currents at any instant of time. For this reason, the voltage equations in phase quantities, expressed in a space vector form by Eq. (2-31) and Eq. (2-32), which include the time derivatives of flux linkages, are complicated to solve. It is possible to make these equations simpler by using a transformation called dq transformation, which is the topic of the next chapter.