Patent ID: 9438126
Filing Date: 2016-09-06
CPC Classification: H02M,Y02B

Claim Text:
1. A power conversion method of a power conversion device including a plurality of primary side ports disposed in a primary side circuit and a plurality of secondary side ports disposed in a secondary side circuit magnetically coupled to the primary side circuit with a transformer, the power conversion device adjusting transmission power transmitted between the primary side circuit and the secondary side circuit by changing a phase difference between switching of the primary side circuit and switching of the secondary side circuit, the power conversion method comprising: setting the phase difference to a calculated value; determining whether power is transmitted from the secondary side circuit to the primary side circuit; calculating a transmission efficiency based on a primary side power calculated value of the primary side circuit and a secondary side power calculated value of the secondary side circuit; setting an adjustment value of the phase difference to a value that is obtained by dividing the transmission efficiency by a specified efficiency; determining whether the adjustment value is less than a specified value; and setting the phase difference to a value that is obtained by dividing the calculated value by the adjustment value when the adjustment value is less than the specified value.