Integrated power system capable of switching between power supply mode and electronic load mode and switching method thereof

An integrated power system capable of switching between a power supply mode and an electronic load mode, comprising:

• an AC/DC conversion module, electrically coupled to an external power source;
• a DC/DC conversion module, electrically coupled to the AC/DC conversion module;
• and
• a DC/AC conversion module, electrically coupled to the DC/DC conversion module and a device under test;
• wherein the DC/AC conversion module includes a microprocessor, a power element, a power element-driving circuit, a voltage-detecting circuit and a current-detecting circuit;
• the power element-driving circuit is electrically coupled to the microprocessor and the power element and the power element-driving circuit is controlled to drive the power element;
• the power element is electrically coupled to the device under test;
• the voltage-detecting circuit and the current-detecting circuit are electrically coupled between the power element and the device under test;
• wherein in the power supply mode, the microprocessor controls the power element-driving circuit according to a voltage setting value so that the power element inputs a corresponding voltage to the device under test, and the voltage-detecting circuit and the current-detecting circuit monitor an output voltage value and an output current value output to the device under test respectively and feed the output voltage value and the output current value to the microprocessor;
• wherein in the electronic load mode, the microprocessor controls the voltage-detecting circuit to detect an input voltage value input by the device under test, the microprocessor obtains a voltage phase according to the input voltage value, the microprocessor controls the power element-driving circuit according to a current setting value and the voltage phase so that the power element generates a load current for the device under test.