Patent ID: 11909307
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A power conversion device comprising:
a power converter including a plurality of arms, each arm including a plurality of sub modules connected in series; and
a control device to control voltages of the plurality of sub modules by PWM control using a carrier signal for each sub module,
the sub module including a plurality of switching elements, a power storage element, a pair of output terminals, and a bypass switch to bypass the sub module, wherein
when the control device detects failure of one or more sub modules among the sub modules included in the arm, the control device performs stop processing for turning off the sub modules included in the arm and has the sub module failure of which was detected bypassed, and
after the control device performs the stop processing, the control device equalizes uneven intervals among phases of carrier signals of a plurality of normal sub modules in the arm caused by failure of the one or more sub modules.