Power conversion device

A power conversion device comprising:

• a boost converter which includes a magnetically-coupled reactor and a plurality of semiconductor switching elements connected to the magnetically-coupled reactor, and boosts DC voltage supplied from an external power supply;
• an inverter which converts DC power outputted from the boost converter, to AC power, and supplies the AC power to an external load;
• a cooler for cooling the magnetically-coupled reactor;
• a bus bar which is a conductive wiring member;
• and
• a current sensor for detecting a magnetic flux generated around the bus bar, wherein
• the plurality of semiconductor switching elements include a first semiconductor switching element and a second semiconductor switching element connected in series between positive-side and negative-side output terminals of the boost converter, and a third semiconductor switching element and a fourth semiconductor switching element connected in series between the positive-side and negative-side output terminals,
• the magnetically-coupled reactor includes
• a first winding having one end connected to a positive side of the external power supply and another end connected between the first semiconductor switching element and the second semiconductor switching element,
• a second winding having one end connected to the positive side of the external power supply and another end connected between the third semiconductor switching element and the fourth semiconductor switching element, the second winding being wound with the same number of turns as the first winding so as to be magnetically coupled with the first winding in a direction opposite thereto, and
• a core for magnetically coupling the first winding and the second winding,
• the core has a composite magnetic body containing soft magnetic powder and a binder, and at least parts of the first winding and the second winding are embedded in the composite magnetic body,
• the cooler is provided in contact with the magnetically-coupled reactor, and
• the current sensor is provided on a side opposite to the magnetically-coupled reactor with the cooler therebetween.