Method for calculating loss of high-frequency transformer in dual-active bridge DC-DC converter

• Main Authors: CHEN BIN, WAN NINA, HUANG ZIWEI
• Format: Patent
• Language: Chinese; English
• Published: 24.05.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses a method for calculating loss of a high-frequency transformer in a dual-active bridge DC-DC converter. The method comprises the following steps: deducing an equivalent circuit model and a phasor relationship between excitation voltage and current; deriving a harmonic current expression related to the control degree of freedom by adopting a fundamental wave analysis method; calculating alternating current resistance coefficients under different orders of harmonic waves by adopting a Dowell equation; summing the loss generated by the harmonic current of each order to obtain the winding loss Pcu; deducing magnetic flux density waveforms of excitation voltages on two sides of the high-frequency transformer, and superposing the two magnetic flux density waveforms to obtain a total magnetic flux density waveform in an iron core; and calculating the iron core loss of the high-frequency transformer, and according to the characteristic that the total magnetic flux density waveform of the iron c