Unbalanced three-phase power supply device and power supply for evaluation

An unbalanced three-phase power supply device comprising:

• a control circuit including:
• a current command generation unit that receives unbalanced three-phase current information including phase command values and amplitude command values of a U-phase, a V-phase, and a W-phase of a predetermined zero-phase-containing unbalanced three-phase current which is an unbalanced three-phase current containing a zero-phase component, and generates a U-phase current command, a V-phase current command, and a W-phase current command having phases, frequencies, and active component and reactive component amplitudes respectively corresponding to the phase command values and the amplitude command values of the U-phase, the V-phase and the W-phase of the predetermined zero-phase-containing unbalanced three-phase current on the basis of the unbalanced three-phase current information;
• and a pulse modulation signal generation circuit that outputs a U-phase pulse modulation signal, a V-phase pulse modulation signal, and a W-phase pulse modulation signal corresponding to the U-phase current command, the V-phase current command, and the W-phase current command that are generated in the current command generation unit;
• and
• a main circuit including:
• a direct current (DC) power supply that outputs a predetermined DC voltage or DC current;
• a three-phase inverter device that includes a U-phase inverter unit, a V-phase inverter unit, and a W-phase inverter unit, and in which, in accordance with the U-phase pulse modulation signal, the V-phase pulse modulation signal, and the W-phase pulse modulation signal from the pulse modulation signal generation circuit and by using the predetermined DC voltage or DC current from the DC power supply, the U-phase inverter unit, the V-phase inverter unit, and the W-phase inverter unit generate a U-phase current, a V-phase current, and a W-phase current having phases, frequencies, and amplitudes respectively corresponding to the phase command values and the active component and reactive component amplitude command values of the U-phase, the V-phase and the W-phase of the predetermined zero-phase-containing unbalanced three-phase current, to output an internal zero-phase-containing unbalanced three-phase current including the U-phase current, the V-phase current, and the W-phase current;
• and a three-phase transformation device that includes a U-phase winding part, a V-phase winding part, a W-phase winding part, and a secondary winding neutral point, and in which a secondary winding of the U-phase winding part, a secondary winding of the V-phase winding part, and a secondary winding of the W-phase winding part are connected in Y-connection, the secondary winding neutral point is a neutral point of the Y-connection, and the U-phase current, the V-phase current and the W-phase current of the internal zero-phase-containing unbalanced three-phase current from the three-phase inverter device are input to a primary winding of the U-phase winding part, a primary winding of the V-phase winding part, and a primary winding of the W-phase winding part, respectively,
• wherein the DC power supply, the three-phase inverter device, and the three-phase transformation device of the main circuit have respective forms and a mutual connection relationship that enable output of a zero-phase component of an external zero-phase-containing unbalanced three-phase current obtained by converting the internal zero-phase-containing unbalanced three-phase current according to a winding number ratio in the three-phase transformation device, and the external zero-phase-containing unbalanced three-phase current is output by the secondary winding of the U-phase winding part, the secondary winding of the V-phase winding part, and the secondary winding of the W-phase winding part connected in Y-connection, and the secondary winding neutral point, of the three-phase transformation device.