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The smaller the internal resistance of the power supply module voltage source, the higher the requirements for the internal resistance of the power supply module flow source!

1. When analyzing and solving complex power module circuits, the power module circuit of the real power module power supply should be equivalent to an ideal power module source. The important parameters of the real power module power supply are the internal resistance and dynamic force of the module. There are two types Ideal module power supply:

(1) The voltage source of the power module, which has the same terminal power module voltage in the power module circuit, also called a constant voltage source;

(2) One is the power module flow source, in which there is a constant power module flow in the power module circuit, also called a constant current source; the real power module source is directly converted into an ideal module power supply, which can convert the real power module power supply, etc. It is effective as a power module voltage source with internal resistance in series, or equivalent to a power module current source connected in parallel with the power module resistance, and can convert the real power module power to a power module voltage source with internal resistance, or equivalent to Power module resistance parallel power module flow source; after equivalent transformation, the relationship between the components of the power module circuit becomes a single series parallel relationship, thereby converting the complex power module circuit into a simple power module circuit.

2. How to understand "ideal constant voltage source and constant current source"? We all know the source of the real power module:

(1) There is internal resistance;

(2) The power module has a constant electromotive force;

(3) In the middle of the power module circuit, the voltage of the power module and the flow of the power module change with the change of the load;

3. Under what circumstances can a real module power supply be equivalent to an "ideal constant voltage source and constant current source"?

(1) When the resistance of the load power module in the power module is much larger than the internal resistance, or when the internal resistance is small, it can be regarded as a power supply with a constant voltage at the end of the power module.

(2) When the load power module resistance of the power module circuit is much smaller than the internal resistance, or the internal resistance is as large as infinite, it can be regarded as the constant power module flow source of the terminal power module. For example, in the transistor amplifier power module circuit, heat is collected The power module flow of the power module of the converter has nothing to do with the load size, and can be regarded as the power module flow source;