Abstract: A resolver includes a sine coil and a cosine coil that transmit AC signals having phases of the electrical angle different from each other by 90 degrees in one of a sheet-like excitation coil and a sheet-like detection coil disposed at a rotor or a stator, and a counter coil or a conductor disposed to face the sine coil and the cosine coil in the other of the excitation coil and the detection coil. In addition, an area (S) of a portion where each of the sine coil and the cosine coil and the counter coil or the conductor overlap each other when viewed in the axial direction of the resolver changes into a sinusoidal shape as the rotor rotates.

Abstract: A control device of a rotation detector inputs an AC signal to an excitation coil and detects a rotation angle on the basis of a signal obtained by a detection coil. The control device includes: a controller that can output a plurality of excitation signals having a predetermined voltage; and a signal generation unit that generates the AC signal on the basis of the plurality of excitation signals output from the controller. In addition, the control device includes a voltage dividing circuit that is interposed between the controller and the signal generation unit and decreases the predetermined voltage of the plurality of excitation signals by a resistor to transmit the voltage to the signal generation unit.

Abstract: A control device that is a control device for a three-phase brushless motor includes: an externally applied voltage acquisition unit that acquires externally applied voltage applied to the three-phase brushless motor; a rotation speed calculation unit that calculates rotation speed of the three-phase brushless motor; a storage unit that stores a voltage advance angle map in which the externally applied voltage and the rotation speed and a voltage advance angle are associated with each other under a condition that a magnetic flux component Id of the magnetic flux component and a torque component of phase current is constant; and a voltage advance angle calculation unit that calculates the voltage advance angle based on the externally applied voltage acquired by the externally applied voltage acquisition unit, the rotation speed calculated by the rotation speed calculation unit, and the voltage advance angle map stored in the storage unit.

Abstract: The present invention relates to a high concentration aqueous starch slurry adhesive comprising 20 to 60% of starch and the following components in the specified amount based on the weight of starch:(1) 0.01 to 1.0% of rhamsan gum or xanthan gum,(2) 1.0 to 3.0% of sodium hydroxide, and(3) if necessary, up to 3% of sodium tetraborate.According to the present invention, a high concentration aqueous starch slurry adhesive can be easily obtained at a single step by merely dispersing starch into cold water while stirring.