Power conversion device

A power conversion device for converting first to third-phase AC voltages supplied from an AC power supply into fourth to sixth-phase AC voltages and supplying the fourth to sixth-phase AC voltages to a load, the power conversion device comprising:

• first to third-phase converters configured to convert the first to third-phase AC voltages into DC voltages, respectively;
• first to third DC positive buses electrically connected to the first to third-phase converters, respectively;
• first to third DC negative buses electrically connected to the first to third-phase converters, respectively;
• a fourth-phase inverter connected between the first DC positive bus and the first DC negative bus, and configured to convert the DC voltage into the fourth-phase AC voltage;
• a fifth-phase inverter connected between the second DC positive bus and the second DC negative bus, and configured to convert the DC voltage into the fifth-phase AC voltage;
• and
• a sixth-phase inverter connected between the third DC positive bus and the third DC negative bus, and configured to convert the DC voltage into the sixth-phase AC voltage,
• the first to third-phase converters including diode rectifiers,
• the power conversion device further comprising:
• a first fuse connected between the AC power supply and the first-phase converter;
• a second fuse connected between the AC power supply and the second-phase converter;
• a third fuse connected between the AC power supply and the third-phase converter;
• fourth to sixth fuses inserted into the first to third DC positive buses, respectively;
• and
• seventh to ninth fuses inserted into the first to third DC negative buses, respectively.