Patent ID: 11916434
Assignee: TOSHIBA MITSUBISHI—ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. The power conversion device according to claim 3, wherein
the bidirectional chopper includes:
first and second switching elements connected in series between a positive electrode and a negative electrode of the capacitor;
first and second diodes connected in antiparallel to the first and second switching elements, respectively; and
a reactor connected between a positive electrode of the power storage device and a node between the first and second switching elements,

the control circuit
turns on and off the first switching element when the AC power supply is normal,
turns on and off the second switching element when a power failure of the AC power supply occurs, and
turns off the first and second switching elements when an operation of the bidirectional chopper is stopped.