POWER SUPPLY CIRCUIT AND SYSTEM

Provided are a power supply circuit and a power supply system. In the power supply circuit, a main circuit output module includes a first DC/DC converter and a first AC/DC inverter, and a conversion module is configured to output DC power to the first DC/DC converter according to input AC power. The first DC/DC converter is configured to convert the DC power into a constant DC voltage, and output the constant DC voltage to a first AC/DC inverter. The first AC/DC inverter is configured to acquire first supplied electrical energy by converting the constant DC voltage into AC power, and output the first supplied electrical energy.