Electrical, Electronic, and Electromechanical Systems
Many engineering systems have electrical, electronic, or electromechanical subsystems as important components, such as power supplies, motors, sensors, and controllers. In this chapter, we discuss the modeling techniques for these systems. We first introduce the fundamentals of electrical elements, which include resistors, inductors, and capacitors. The two main physical laws, Kirchhoff’s voltage law and Kirchhoff’s current law, are then reviewed and applied to develop mathematical models of electrical circuits. For electronic systems, we study simple operational amplifiers (op-amps), and present the op-amp equation, which is useful for obtaining models of amplifiers. This is followed by the modeling of electromechanical systems. The coupling between electrical and mechanical subsystems is established and applied to motor modeling. To simplify the modeling of electrical systems, the concept of impedance is introduced, which provides an alternative way of obtaining mathematical models of systems. The chapter concludes with simulation of electrical, electronic, and electromechanical systems by using MATLAB®, Simulink®, and SimscapeTM computer tools.