Anode rotational drive device and X-ray imaging apparatus

An anode rotational drive device of an X-ray tube including a two-phase anode rotation mechanism including a main stator coil and an auxiliary stator coil, the anode rotational drive device comprising:

• an inverter circuit section formed by connecting three arm circuits, each of which is formed by connecting two semiconductor switches in series, in parallel to each other;
• and
• a switching pattern signal generation section that generates a switching pattern signal to turn on and off each of the six semiconductor switches of the inverter circuit section at predetermined timing,
• wherein, among the three arm circuits, one end of the main stator coil is connected to a midpoint between two semiconductor switches of a first arm, one end of the auxiliary stator coil is connected to a midpoint between two semiconductor switches of a second arm, and the other ends of the main stator coil and the auxiliary stator coil are connected to a midpoint between two semiconductor switches of a third arm, and
• the switching pattern signal generation section includes an inverting circuit and first to fourth ON signal output circuits, which output the ON signal only in a predetermined period from predetermined timing, and generates the switching pattern signal for supplying a first AC voltage to the one end of the main stator coil and a second AC voltage, which is shifted in phase by 90° from the first AC voltage, to the one end of the auxiliary stator coil.