Semiconductor circuit

A semiconductor circuit comprising:

• a plurality of semiconductor switches arranged in parallel to one another and configuring arms connected between positive and negative poles of a DC power supply;
• and
• a drive circuit configured to cause the plurality of semiconductor switches of the arms to switch to an on state or an off state at the same time, wherein,
• the drive circuit includes means to detect a short circuit of a semiconductor switch and cause the short-circuited semiconductor switch to switch to the off state,
• an inter-switch current suppression portion is electrically connected to signal lines between the drive circuit, and control signal input terminals and current output terminals of the semiconductor switches,
• the inter-switch current suppression portion is a semiconductor circuit including oppositely wound coils facing each other, and configuring a semiconductor power conversion device that facilitates the semiconductor switches to switch to the off state with the drive circuit, using the inter-switch current flowing between the current output terminals of the plurality of semiconductor switches,
• a current lead wire connected from the positive pole to collector terminals of the semiconductor switches is configured from a collector-side bus bar branched in an equal manner from the collector terminals of the adjacent semiconductor switches,
• a current lead wire connected from emitter-side terminals of the semiconductor switches to the negative pole is configured from an emitter-side bus bar branched in an equal manner to the emitter terminals of the adjacent semiconductor switches,
• the collector-side bus bar and the emitter-side bus bar are arranged in parallel in a state of being isolated from each other and are fitted in a fixed manner to each other, and
• an inductance generation portion is provided in one or both of the collector-side bus bar and the emitter-side bus bar, the inductance generation portion generating a difference in inductance between the collector-side bus bar and the emitter-side bus bar.