Patent ID: 11876441
Assignee: FUJI ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 9:
10. The switching control circuit according to claim 9, wherein
the resonant converter includes a resonant circuit; and
the determination circuit includes:
a direction detection circuit configured to detect whether the resonance current is in
a positive direction, in which the resonance current flows from a connecting point between the first switching device and the second switching device to the resonant circuit of the resonant converter, or
a negative direction, in which the resonance current flows from the resonant circuit to the connecting point; and

a mode determination circuit configured to
at the third timing, determine that the operation mode is the first mode if the resonance current is in the negative direction, and determine that the operation mode is the second mode if the resonance current is in the positive direction, and
at the fourth timing, determine that the operation mode is the first mode if the resonance current is in the positive direction, and determine that the operation mode is the second mode if the resonance current is in the negative direction.