Full bridge configuration power conversion apparatus for power conversion among at least three devices

A power conversion apparatus for power conversion among at least a first device, a second device, and a third device, a first terminal voltage across the first device being set to be higher than a second terminal voltage across the second device and lower than a third terminal voltage across the third device, the power converter comprising:

• a primary converter configured to perform power conversion between the first device and second device, the primary converter comprising a first switch, a second switch, a third switch, a fourth switch, and a capacitor,
• the second switch, the third switch, the fourth switch, and the capacitor being connected in full bridge configuration to constitute a full bridge converter having a first connection point between the third and fourth switches and a second connection point between the capacitor and the second switch,
• the first switch being connected in series between the full bridge converter and the first device;
• a secondary converter including at least one conversion switch connected to the third device;
• a magnetic circuit configured to magnetically connect between the primary converter and the secondary converter while electrically isolating between the primary converter and the secondary converter,
• the secondary converter being configured to perform power conversion of power transmitted between the transformer and the third device;
• a first inductor connected between the first connection point of the full bridge converter and the second device;
• a second inductor connected between the second connection point of the full bridge converter and the second device;
• and
• a controller configured to:
• control on-off switching operations of the at least one conversion switch;
• alternately turn on the first and second switches;
• and
• alternately turn on the third and fourth switches.