Inverter control board that is configured so that a detection circuit is appropriately arranged

An inverter control board that is configured to be connected to an inverter for performing conversion between direct current power and multiple-phase alternating current power, wherein the inverter has arms, each arm provided for one alternating current phase and comprising a series circuit of a high-side switching element to be connected to a direct-current positive electrode and a low-side switching element to be connected to a direct-current negative electrode, the inverter control board comprising:

• a drive control circuit for driving and controlling the inverter;
• a low-voltage region and a high-voltage region as regions where a plurality of circuits are arranged, wherein:
• a circuit of the plurality of circuits arranged in the high-voltage region has a higher operating voltage than a circuit of the plurality of circuits arranged in the low-voltage region,
• the high-voltage region includes a plurality of high-side high-voltage regions, each configured to be connected to the high-side switching element of a corresponding phase, and
• the high-voltage region includes a plurality of low-side high-voltage regions, each configured to be connected to the low-side switching element of a corresponding phase;
• an insulation region that electrically insulates the low-voltage region, each of the high-side high-voltage regions, and each of the low-side high-voltage regions from one another, wherein:
• the circuit in the low-voltage region and the circuit in each of the high-side high-voltage regions are connected via respective high-side connection circuits included in a connection circuit across the insulation region and that transmits a signal in an electrically insulated state, and
• the circuit in the low-voltage region and the circuit in each of the low-side high-voltage regions are connected via respective low-side connection circuits included in the connection circuit and that transmits a signal in an electrically insulated state;
• and
• a voltage detection circuit for detecting a direct-current-side voltage of the inverter is arranged between the high-side connection circuit and the low-side connection circuit that are adjacent to each other.