Vector Control of AC Drives
Alternating current (AC) induction and synchronous machines are frequently used in variable speed drives with applications ranging from computer peripherals, robotics, and machine tools to railway traction, ship propulsion, and rolling mills. The notable impact of vector control of AC drives on most traditional and new technologies, the multitude of practical configurations proposed, and the absence of books treating this subject as a whole with a unified approach were the driving forces behind the creation of this book.
Vector Control of AC Drives examines the remarkable progress achieved worldwide in vector control from its introduction in 1969 to the current technology. The book unifies the treatment of vector control of induction and synchronous motor drives using the concepts of general flux orientation and the feed-forward (indirect) and feedback (direct) voltage and current vector control. The concept of torque vector control is also introduced and applied to all AC motors. AC models for drive applications developed in complex variables (space phasors), both for induction and synchronous motors, are used throughout the book. Numerous practical implementations of vector control are described in considerable detail, followed by representative digital simulations and test results taken from the recent literature.
Vector Control of AC Drives will be a welcome addition to the reference collections of electrical and mechanical engineers involved with machine and system design.
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FUNDAMENTALS OF INDUCTION MOTOR VECTOR
Vector Voltage Control
VECTOR CONTROL OF PERMANENT MAGNET SYNCHRONOUS
ac drives ac motors applied axis base speed Chapter components constant stator flux converter current decoupling network current vector current-source cycloconverter d-axis digital signal processors electric drive equations feed forward field current flux and torque flux controller flux estimation flux linkage flux orientation control flux vector flux weakening harmonics high speeds hysteresis ibid IEEE-IAS indirect vector induced voltage induction machine Induction Motor Drives leakage inductances low speeds magnetizing maximum torque obtained parameter detuning phase power factor q-axis reference current regenerative braking robust rotor flux orientation rotor position rotor resistance saturation shown in Fig sinusoidal sliding mode Sliding Mode Control slip frequency source inverter space phasor speed control speed response stator coordinates stator current stator flux orientation steady-state step response synchronous coordinates synchronous machine synchronous motor thyristors torque control torque response torque vector control unity power factor variable vector current control voltage source voltage vector zero