Circuit for detecting failure of zero voltage switching

A resonant power conversion apparatus comprising:

• a gate control circuit configured to control a first switch and a second switch such that:
• during a first stage, the first switch is in an On state and the second switch is in an Off state, and
• during a second stage, the first switch is in the Off state and the second switch is in the On state;
• a first current transformer configured to receive a current from the first switch during the first stage and receive a current from the second switch during the second stage;
• a load connected to the first current transformer;
• a second current transformer electrically connected to the second switch;
• and
• a microcontroller unit (MCU) configured to determine, based on a first current of the first current transformer and a second current of the second current transformer, whether zero voltage switching or non-zero voltage switching is occurring when transitioning between the first stage and the second stage.