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After studying this course, you are required to have a basic understanding of the basic laws of magnetic circuits, the characteristics of commonly used ferromagnetic materials and the calculation of alternating current and tributary magnetic circuits; and have a basic understanding of transformers and three types of motors (DC motors, induction motors and synchronous motors). You must have a certain understanding of the basic structure; you must have an in-depth understanding of the main magnetic field and leakage magnetic field in the transformer, the properties and spatio-temporal relationship of the air gap magnetic field in the three types of motors; you must have an in-depth understanding of the operating principles of the transformer and the three types of motors during normal steady-state operation. , analysis methods and operating performance must be firmly mastered, be able to correctly establish voltage equations and torque equations, clarify energy conversion relationships, have a clear physical concept of steady-state parameters, and be able to skillfully use equivalent circuits and complex numbers to calculate symmetry Performance and operating data during steady-state operation; master the basic experimental methods and operating skills of the motor, such as the starting of the motor, the voltage build-up of the generator, the measurement methods of the main operating characteristics and steady-state parameters, etc., and be able to analyze the experimental results. analyze