Patent ID: 9107280
Filing Date: 2015-08-11
Classification: G08C,H01H,H01J,H02K,H02P,H05G

Abstract:
1. 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 first and second inverting circuits and a delay circuit, 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.