This Third Edition brings Lander's successful text completely up to date, retaining the original material but adding important new information. In particular, a whole new section on EMC (electromagnetic compatibility) is incorporated into the chapter on harmonics. Recently emerged semiconductor devices, such as IGBTs and MCTs are covered, as are other new topics, including active filters for harmonic elimination. The control sections are considerably expanded to take into account pulse-width modulated converters for power factor control, vector control of cage induction motor drives and resonant converters. The balanced and broad structure of coverage from the previous editions remain and is augmented by many new worked examples and an updated bibliography.