ABSTRACT
Scalar control of induction motors and generators means control of the magnitude of their voltage and frequency to achieve suitable torque and speed with an impressed slip. Scalar control can be easily understood based on the fundamental principles of induction-machine steady-state modeling. A power electronic system is used either for a series connection of inverters and converters between the induction generator and the grid or as a parallel path system capable of providing reactive power for isolated operation. This chapter describes such principles, laying out foundations for understanding the more complex vector-controlled systems.
