System Theory

AC Electric Motors Control: Advanced Design Techniques and by Fouad Giri

By Fouad Giri

The complexity of AC motor regulate lies within the multivariable and nonlinear nature of AC computer dynamics. fresh developments on top of things idea now give the chance to accommodate long-standing difficulties in AC cars keep watch over. this article expertly attracts on those advancements to use quite a lot of model-based keep watch over designmethods to a number of AC motors.

Contributions from over thirty most sensible researchers clarify how glossy keep watch over layout tools can be utilized to accomplish tight pace rules, optimum lively potency, and operation reliability and safeguard, through contemplating on-line kingdom variable estimation within the absence of mechanical sensors, energy issue correction, desktop flux optimization, fault detection and isolation, and fault tolerant control.

Describing the entire regulate technique, either controller and observer designs are validated utilizing complicated nonlinear equipment, balance and function are analysed utilizing robust suggestions, together with implementation concerns utilizing electronic computing means.

different key features:

• Covers the most sorts of AC vehicles together with triphase, multiphase, and doubly fed induction cars, wound rotor, everlasting magnet, and inside PM synchronous motors

• Illustrates the usefulness of the complicated regulate tools through business functions together with electrical automobiles, excessive pace trains, metal generators, and more

• contains certain specialise in sensorless nonlinear observers, adaptive and powerful nonlinear controllers, output-feedback controllers, fault detection and isolation algorithms, and fault tolerant controllers

This accomplished quantity offers researchers and architects and R&D engineers with a single-source reference on AC motor procedure drives within the automobile and transportation undefined. it's going to additionally attract complex scholars in automated keep watch over, electric, strength platforms, mechanical engineering and robotics, in addition to  mechatronic, method, and utilized keep an eye on approach engineers.

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Extra resources for AC Electric Motors Control: Advanced Design Techniques and Applications

Sample text

Chapter 21 is on AC motor control applications in vehicle traction. It describes the requirements of vehicle traction applications that AC drive systems must meet. The chapter reviews recent trends of vehicle traction drive architectures in the marketplace and in the available literature. It discusses suitable motor types, control requirements, energy storage and management issues between drive and regenerative braking modes of operation, and battery sizing. The battery management system with temperature compensation for charging and discharging current limits and for monitoring the state of charge (SOC) are discussed.

Techniques of sensorless control are proposed via direct torque control (DTC) in the stator dq flux estimation and in the rotor frame via stator flux and rotor position observers. Both open- and closed-loop operations are described. Techniques of sensorless control combining signal injection and observer methods at very low speed and covering a wide speed range are also included. Chapter 20 is about nonlinear state-feedback controllers for three-phase wound-rotor synchronous motors. Considering the “converter-motor” set, the method makes it possible to provide motor speed regulation, in addition to other important control objectives such as PFC with respect to the grid supply and DC Link voltage regulation.

5 Conclusions In this chapter, the problem of modeling induction motors has been concisely addressed. First, the triphase model is established applying electromagnetic and mechanical laws. This model is certainly the most physical as all variables it involves can be made accessible to measurements. However, it is hardly applicable in control design due to its high complexity. Then, simpler two-phase variants of that model are obtained by using the Park transformation. The simpler (two-phase) models are still nonlinear but will prove to be tractable in control design.

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