Abstract: A control moment gyroscope includes: an inner gimbal; a rotor that is held by the inner gimbal to be rotatable around a spin axis; a spin motor that is disposed on the inner gimbal, and that rotates the rotor around the spin axis; a stator that holds the inner gimbal to be rotatable around a gimbal axis that is perpendicular to the spin axis; gimbal bearings that are disposed between the inner gimbal and the stator to face each other from opposite sides of a plane that is perpendicular to the gimbal axis and that includes the spin axis, to be in contact with the plane in question, or to include the plane in question; and a torque module that is disposed on the stator, and that rotates the inner gimbal around the gimbal axis.

Abstract: A control moment gyroscope includes: an inner gimbal; a rotor that is held by the inner gimbal to be rotatable around a spin axis; a spin motor that is disposed on the inner gimbal, and that rotates the rotor around the spin axis; a stator that holds the inner gimbal to be rotatable around a gimbal axis that is perpendicular to the spin axis; gimbal bearings that are disposed between the inner gimbal and the stator to face each other from opposite sides of a plane that is perpendicular to the gimbal axis and that includes the spin axis, to be in contact with the plane in question, or to include the plane in question; and a torque module that is disposed on the stator, and that rotates the inner gimbal around the gimbal axis.

Abstract: A switchgear includes a stationary contact, a movable contact able to be shifted between a closed position and an opened position, an electromagnetic actuator able to generate power for shifting the movable contact, the electromagnetic actuator including a stator and a movable element, and a power transmission unit able to shift the movable contact, and to press the movable contact against the stationary contact. The power transmission unit includes a drive unit-side spring bearing portion able to be shifted together with the movable element, a contact-side spring bearing portion to be opposed to the drive unit-side spring bearing portion, and able to be shifted together with the movable contact, and a spring member provided between the drive unit-side spring bearing portion and the contact-side spring bearing portion.

Abstract: A switchgear includes a stationary contact, a movable contact able to be shifted between a closed position and an opened position, an electromagnetic actuator able to generate power for shifting the movable contact, the electromagnetic actuator including a stator and a movable element, and a power transmission unit able to shift the movable contact, and to press the movable contact against the stationary contact. The power transmission unit includes a drive unit-side spring bearing portion able to be shifted together with the movable element, a contact-side spring bearing portion to be opposed to the drive unit-side spring bearing portion, and able to be shifted together with the movable contact, and a spring member provided between the drive unit-side spring bearing portion and the contact-side spring bearing portion.

Abstract: Provided are: a vacuum interrupter having a fixed contact and a movable contact; a fixed side mounting plate which supports a fixed side conductor; and an operating mechanism which is coupled to a movable side conductor and performs opening and closing operation of both the contacts. The fixed side mounting plate is configured such that a plurality of plate-like members are overlapped; an exposed portion of the fixed side conductor is attached with a divided terminal which has a fitting hole to be fitted to the exposed portion and is formed with a slit in a radial direction from the fitting hole; and the divided terminal is fixed to the fixed side mounting plate and the fixed side conductor is supported by the fixed side mounting plate via the divided terminal.

Abstract: Provided are: a vacuum valve having a fixed contact and a movable contact; a fixed side mounting plate which supports a fixed side conductor; and an operating mechanism which is coupled to a movable side conductor and performs opening and closing operation of both the contacts. The fixed side mounting plate is configured such that a plurality of plate-like members are overlapped; an exposed portion of the fixed side conductor is attached with a divided terminal which has a fitting hole to be fitted to the exposed portion and is formed with a slit in a radial direction from the fitting hole; and the divided terminal is fixed to the fixed side mounting plate and the fixed side conductor is supported by the fixed side mounting plate via the divided terminal.

Abstract: A micro-step driving control apparatus for a stepping motor in which torque fluctuations caused by influence of detent torque can be reduced without performing preliminary driving, including: a phase difference estimator calculating, based on detected motor current and a command value, an estimated phase difference between the command value and the current; low-speed and high-speed motor rotational angle estimators calculating an estimated motor rotational angle at a low speed rotation and an estimated motor rotational angle at a high speed rotation; an addition unit calculating, based on the command value, an estimated motor rotational angle by mixing the estimated motor rotational angles at an appropriate rate; a detent torque estimator calculating, based on the mixed estimated motor rotational angle, estimated detent torque; and a compensation signal generator generating a compensation signal based on the estimated detent torque and the mixed estimated motor rotational angle.

Abstract: A micro-step driving control apparatus for a stepping motor in which torque fluctuations caused by influence of detent torque can be reduced without performing preliminary driving, including: a phase difference estimator calculating, based on detected motor current and a command value, an estimated phase difference between the command value and the current; low-speed and high-speed motor rotational angle estimators calculating an estimated motor rotational angle at a low speed rotation and an estimated motor rotational angle at a high speed rotation; an addition unit calculating, based on the command value, an estimated motor rotational angle by mixing the estimated motor rotational angles at an appropriate rate; a detent torque estimator calculating, based on the mixed estimated motor rotational angle, estimated detent torque; and a compensation signal generator generating a compensation signal based on the estimated detent torque and the mixed estimated motor rotational angle.