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

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

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