Catalog Description: Components of a controlled variable-speed drive: mechanical load, electrical machine, power converter, control equipment; speed and torque control via field orientation for induction, synchronous, and permanent-magnet drives. Use of simulation programs (e.g., SPICE, finite element, Runge-Kutta integration).

Prerequisite: ECEN 4167, Energy Conversion 2, or consent of instructor.

Textbook:
Power Semiconductor Controlled Drives, G.K. Dubey, Prentice-Hall, 1989 (Ch. 8, 10, 11); Control of Electrical Drives, W. Leonhard, Springer Verlag, 1985 (Ch. 10, 11, 12, 14, 15).

Goals: To teach the student components of variable-speed drives, designgating circuits, analyze drives in motor and regeneration modes, control speed and torque independently via field oriented control, determine parameters of adjustable-speed drives, efficiency considerations.

Topics:

Frequency-controlled induction motor drives without field orientation.
Synchronous and permanent-magnet motors.
Self-controlled synchronous motor drives.
Symmetrical three-phase ac induction machine.
Power supplies for variable-speed ac drives.
Control of induction motor drives via field orientation.
Variable frequency synchronous motor drives employing field orientation.
Some applications of controlled electric drives.

Computer Usage:

Solution of nonlinear differential equations of a controlled drive via SPICE or Runge-Kutta integration (rectifier/inverter/machine/control circuit).
Determination of nonlinear field parameters via finite element method.

Laboratory Projects:

None.

ABET Category Content:

Engineering Science: 1.5 credits or 50%

Engineering Design: 1.5 credits or 50%