A circuit comprising: a switched reluctance motor configured to be driven when excitation currents flow through three-phase coils; a switching circuit connected to the switched reluctance motor, the switching circuit configured to switch the switched reluctance motor between a first winding pattern and a second winding pattern, the first winding pattern being a winding pattern in which the three-phase coils are wound in the same direction, the second winding pattern being a winding pattern in which the two-phase coils of the three-phase coils are wound in the same direction, the remaining one-phase coil is wound in an opposite direction, and the two-phase coils with the same winding direction and the one-phase coil with the opposite winding direction are alternately arranged; and an electronic control unit configured to switch the switching circuit such that the switched reluctance motor has the first winding pattern, when the electronic control unit determines that a torque and a rotational speed of the switched reluctance motor are located in a first range on a lower load side than a boundary, the boundary dividing a driving range of the switched reluctance motor into the first range and a second range, the electronic control unit configured to switch the switching circuit such that the switched reluctance motor has the second winding pattern, when the electronic control unit determines that the torque and the rotational speed of the switched reluctance motor are located in the second range different from the first range, the driving range of the switched reluctance motor being a range that is determined by the torque and the rotational speed of the switched reluctance motor, and the torque and the rotational speed of the switched reluctance motor being determined according to an applied voltage. a switched reluctance motor configured to be driven when excitation currents flow through three-phase coils; a switching circuit connected to the switched reluctance motor, the switching circuit configured to switch the switched reluctance motor between a first winding pattern and a second winding pattern, the first winding pattern being a winding pattern in which the three-phase coils are wound in the same direction, the second winding pattern being a winding pattern in which the two-phase coils of the three-phase coils are wound in the same direction, the remaining one-phase coil is wound in an opposite direction, and the two-phase coils with the same winding direction and the one-phase coil with the opposite winding direction are alternately arranged; and the first winding pattern being a winding pattern in which the three-phase coils are wound in the same direction, the second winding pattern being a winding pattern in which the two-phase coils of the three-phase coils are wound in the same direction, the remaining one-phase coil is wound in an opposite direction, and the two-phase coils with the same winding direction and the one-phase coil with the opposite winding direction are alternately arranged; and an electronic control unit configured to switch the switching circuit such that the switched reluctance motor has the first winding pattern, when the electronic control unit determines that a torque and a rotational speed of the switched reluctance motor are located in a first range on a lower load side than a boundary, the boundary dividing a driving range of the switched reluctance motor into the first range and a second range, the electronic control unit configured to switch the switching circuit such that the switched reluctance motor has the second winding pattern, when the electronic control unit determines that the torque and the rotational speed of the switched reluctance motor are located in the second range different from the first range, the driving range of the switched reluctance motor being a range that is determined by the torque and the rotational speed of the switched reluctance motor, and the torque and the rotational speed of the switched reluctance motor being determined according to an applied voltage.