Download AC Motor Control and Electrical Vehicle Applications by Kwang Hee Nam PDF

By Kwang Hee Nam

Motor keep an eye on know-how keeps to play an important position within the initiative to cast off or at the very least lessen petroleum dependency and greenhouse fuel emissions all over the world. elevated motor potency is a vital point of this technology within the worldwide transition to scrub strength use in components equivalent to business purposes and residential appliances―but fairly within the layout of vehicles.

Summarizes the evolution of motor using devices towards excessive potency, good value, excessive energy density, and versatile interface with different components

AC Motor regulate and electrical automobile Applications addresses the themes pointed out in its identify but additionally elaborates on motor layout point of view, akin to again EMF harmonics, loss, flux saturation, and reluctance torque, and so forth. holding theoretical integrity in AC motor modeling and regulate all through, the writer makes a speciality of the advantages and straightforwardness of the rotor field-oriented keep watch over, describing the fundamentals of PWM, inverter, and sensors. He additionally clarifies the basics of electrical autos and their linked dynamics, motor concerns, and battery limits. a robust compendium of functional info, this e-book serves as an total useful gizmo for the layout and keep an eye on of high-efficiency motors.

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37) that  Lf +ug h Lf +ug Lf h ..   Lf h L2f h ..          = z˙ =  . 38) Now, we choose u= 1 (v − Lnf h). 38) that    0 z2  z3  0       z˙ =  ...  =     zn  0 0 v 1 0 ··· 0 1 ··· .. 0 0 ··· 0 0 ···    0 0 0 0     ..  v . 39), a linear system is obtained[9]. Let adf g = [f, g] and adkf g = [f, adk−1 f g], where [f, g] is the Lie bracket of vector fields f and g. 37) is {g, adf g, · · · , adn−1 g} f are linearly independent; {g, adf g, · · · , adfn−2 g} are involutive, where involutive means a distribution is closed under Lie bracket operation[9].

B) Calculate current, torque, and efficiency at 950rpm. 4Vsec/rad. Assume that the maximum armature voltage is vamax = 120V . a) Determine the motor speed when the load torque is TL = 8Nm. 3Vsec/rad under the same load. Recalculate the speed. 1kg · m2 . Then the current loop transfer function with a PI controller, Kp + Ki /s is K Ki p 1 (Kp + Ksi ) La s+r Ia (s) La s + La a = = r +K 1 Ia∗ (s) 1 + (Kp + Ksi ) La s+r s2 + aLa p s + a Ki La = Kp La s + ωn2 s2 + 2ζωn s + ωn2 a) Determine the proportional gain, Kp such that ζωn = 1000.

9 shows a schematic representation of the mapping into the stationary frame. However, it is worthwhile to note that the direction of the current sum vector is identical to the direction of fs in the complex plane. That is, the direction of fs is the same as that of the flux (current) vector in the cross-sectional plane of a motor. Furthermore, the peak value of the abc variable is the same as that of the dq variable. To denote the mapping into the stationary frame, the transformed variable is marked with superscript ‘s’.

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