: Exploration of modern drive systems, including the "exact" and "simplified" performance analysis of AC drives. Inclusion of Magnetic Saturation
Direct Torque Control abandons the traditional decoupling inner-current loops. Instead, it uses hysteresis controllers to regulate torque and stator flux magnitude directly. A lookup table selects the optimal voltage space vectors for the inverter based on errors in torque and flux, bypassing the need for complex coordinate transformations. Space Vector Pulse Width Modulation (SVPWM)
: Describing machine behavior during rapid changes, where traditional single-phase equivalent circuits fail. Intuitive Visualization : Offering a clearer understanding of the rotating magnetic field within a machine. ETH Zürich Key Features of the Book
, we define a new orthogonal coordinate system designated as the direct ( ) and quadrature ( ) axes. If θgtheta sub g is the instantaneous angular position of the -axis relative to the
Electrical machines are no longer viewed merely as coils and magnets. In the modern era, they are high-performance actuators requiring complex mathematical modeling to achieve maximum efficiency and dynamic response. The Foundation of Space Vector Theory : Exploration of modern drive systems, including the
Space vector theory is the mathematical foundation of modern industrial automation. It transforms complex, time-dependent three-phase AC variables into a single rotating vector. This approach simplifies the analysis, design, and control of electrical machines and drives. 1. Foundations of Space Vector Theory
to a specific machine, like the Permanent Magnet Synchronous Motor (PMSM). Let me know which area you'd like to explore further! Share public link
To feed an AC machine with the precise voltage vectors required by space vector control strategies, a three-phase Voltage Source Inverter (VSI) must be actively modulated. Space Vector Pulse Width Modulation (SVPWM) has emerged as the industry standard due to its superior DC-bus voltage utilization and lower harmonic distortion compared to traditional sinusoidal PWM. Inverter Switching States
Field-Oriented Control, or Vector Control, mimics the decoupled torque and flux control of a separately excited DC machine. By aligning the A lookup table selects the optimal voltage space
The true power of the monograph's approach is its ability to treat induction machines, permanent magnet synchronous machines (PMSMs), and synchronous reluctance machines under a unified mathematical umbrella. Induction Motor (IM) Space Vector Equations
: The approach inherently accounts for non-sinusoidal distributions and harmonics.
Te=32P(ψ⃗sg×i⃗sg)=32P(ψsdisq−ψsqisd)cap T sub e equals three-halves cap P open paren modified psi with right arrow above sub s g end-sub cross modified i with right arrow above sub s g end-sub close paren equals three-halves cap P open paren psi sub s d end-sub i sub s q end-sub minus psi sub s q end-sub i sub s d end-sub close paren
It reduces a system of three coupled differential equations (phases ) into two orthogonal equations ( ETH Zürich Key Features of the Book ,
If you are serious about electrical drives—whether for Formula E racing, offshore wind, or industrial robotics—securing the access to this volume is not an option; it is a necessity.
: Detailed analysis of induction machines (including double-cage), salient-pole synchronous machines, and permanent-magnet machines. Variable-Speed Drives
Speed Ref ---> [PI] ---> Isq Ref ---\ +---> [Inverse Park] ---> SVPWM ---> Inverter Flux Ref ---> [PI] ---> Isd Ref ---/ ^ | Rotor Position (θ) -----------------------------/ Direct Torque Control (DTC)