CONTROL METHOD, CONTROLLER, AND CONVERTER FOR RESONANT DUAL-ACTIVE BRIDGE CONVERSION CIRCUIT

Disclosed in the present application is a control method for a resonant dual-active bridge conversion circuit, comprising the following steps: sampling a voltage on a direct current side of a primary circuit, a voltage on a direct current side of a secondary circuit, and a secondary current; calculating a voltage gain by using an input voltage and an output voltage; calculating, by using the voltage gain, an intra-bridge phase shift angle of the primary circuit at a resonant frequency, and a phase angle difference between an inter-bridge phase shift angle at a switching frequency and the intra-bridge phase shift angle at the resonant frequency; calculating a switching frequency of the resonant dual-active bridge conversion circuit according to the secondary current; and according to the switching frequency, the intra-bridge phase shift angle at the resonant frequency, and the phase angle difference, generating a control signal, for controlling switch tubes in the primary circuit and the secondary circuit to b