Basic electronic instruments - practical exercises with LTSpice
Laboratory DC power supply
Goal:
The laboratory power supply works in the set voltage stabilization mode if the output current (flowing through the load) is lower than the set output current on the power supply. If the output current flowing through the load reaches the value of the set current on the power supply, then the power supply switches to the current stabilization mode and maintains a constant current at the power supply output. The purpose of this exercise is to demonstrate the behavior of the power supply in voltage stabilization mode and in current stabilization mode.
Exercise 1:
Investigate the behavior of a real voltage source representing a laboratory DC power supply in the voltage stabilization mode using different load resistors. To do this, recreate the layout shown below in LTSpice:
Measure the voltages and currents flowing through the load resistor. Make a graph showing the current-voltage characteristics of the power supply ( \(U_{out}(I_{out})\) ).
Compare your solution with the video below:
Exercise 2:
Investigate the behavior of a real current source representing a laboratory DC power supply operating in the current stabilization mode using different load resistors. To do this, recreate the layout shown below in LTSpice:
Measure the voltages and currents flowing through the load resistor. Make a graph showing the current-voltage characteristics of the power supply ( \(U_{out}(I_{out})\) ).
Compare your solution with the video below.