Power converter

A power converter comprising:

• a module to house a plurality of switching elements therein;
• and
• a gate driving circuit to drive the switching elements, wherein
• the module includes:
• an upper-side switching element to which a high-potential-side voltage is applied and a lower-side switching element to which a low-potential-side voltage is applied;
• a first signal input terminal connected to a collector potential or a drain potential of the upper-side switching element;
• a third signal input terminal and a fourth signal input terminal connected both to an emitter potential or a source potential of the upper-side switching element and to a collector potential or a drain potential of the lower-side switching element;
• and
• a sixth signal input terminal connected to an emitter potential or a source potential of the lower-side switching element,
• the gate driving circuit includes:
• a first gate driving circuit to drive the upper-side switching element;
• and
• a second gate driving circuit to drive the lower-side switching element,
• the power converter includes a voltage dividing circuit
• to generate a divided voltage obtained by detecting a voltage between the first signal input terminal and the third signal input terminal and to transmit the divided voltage to the first gate driving circuit, and
• to generate a divided voltage obtained by detecting a voltage between the fourth signal input terminal and the sixth signal input terminal and to transmit the divided voltage to the second gate driving circuit,
• the voltage dividing circuit includes:
• a voltage dividing circuit board;
• a first impedance element group disposed on the voltage dividing circuit board;
• a first connection terminal connected to one end of the first impedance element group;
• and
• a second connection terminal connected to the other end of the first impedance element group;
• a second impedance element group disposed on the voltage dividing circuit board;
• a third connection terminal connected to one end of the second impedance element group;
• and
• a fourth connection terminal connected to the other end of the second impedance element group,
• the voltage dividing circuit board is mounted on the module such that the first connection terminal is connected to the first signal input terminal, the second connection terminal is connected to the third signal input terminal, the third connection terminal is connected to the fourth signal input terminal, and the fourth connection terminal is connected to the sixth signal input terminal,
• the first gate driving circuit
• is mounted on a first gate driving circuit board different from the voltage dividing circuit board,
• is connected to the voltage dividing circuit via a line for transmitting a divided voltage between the first signal input terminal and the third signal input terminal from the voltage dividing circuit to the first gate driving circuit, and
• changes a driving speed of the upper-side switching element in accordance with the divided voltage output from the voltage dividing circuit, and
• the second gate driving circuit
• is mounted on a second gate driving circuit board different from the voltage dividing circuit board,
• is connected to the voltage dividing circuit via a line for transmitting a divided voltage between the fourth signal input terminal and the sixth signal input terminal from the voltage dividing circuit to the second gate driving circuit, and
• changes a driving speed of the lower-side switching element in accordance with the divided voltage output from the voltage dividing circuit board.