The basic components of the circuit are the power supply, the load and the connecting conductor.To study the basic rules of the circuit, when you begin to study the course, you must first clarify what the object is.
The circuit research is not the actual circuit, but the circuit model.The idealized circuit element is the scientific abstraction of the actual element.Each ideal element includes two factors:
I. having certain electromagnetic properties
Three basic circuit elements: the resistance element is an idealized model of the actual resistor, which only has the property of converting electrical energy into thermal energy.The inductance element is an idealized model of the actual inductor, which has only the properties of storing magnetic field energy.The capacitance element is an idealized model of the actual capacitor, which has only the property of storing electric field energy.
If there are two kinds of idealized power components: the voltage source is an idealized model of the actual power supply, which only has the property of providing a constant voltage or a given function voltage;The current source is another idealized model of the actual power supply, which only has the property of the output constant current or the given function current.
2. Precise mathematical definitions and mathematical expressions
This lays the foundation for the analysis and calculation of the circuit.Any actual circuit element (part) can be simulated with one or more basic circuit elements to characterize its main electromagnetic properties.The purpose of idealization of the element is to highlight its main electromagnetic characteristics, which is beneficial to the analysis and calculation of the circuit.
The circuit (electromotive force and internal resistance) of the power source is generally referred to as an internal circuit, and the rest (intermediate links and loads) are called external circuits.
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