Abstract: A resolver for detecting the displacement amount of a passive body is provided with an excitation winding or a detection winding. The detection is based on a detection signal outputted from the detection winding as a result of an excitation signal inputted to the excitation winding. The excitation winding and/or the detection winding are composed of a combination of one or more sheet coils having one or more bore portions. The sheet coils are arranged at prescribed intervals in the lengthwise direction of a magnetic core to which the sheet coils are attached. A plurality of coil-storing grooves formed in a direction perpendicular to the lengthwise direction are provided in the core surface of the magnetic core. The coil portions of at least two portions of the respective sheet coils are accommodated in the coil-storing grooves.

Abstract: Sheet coils formed in a ring shape to constitute excitation windings and detection winding, and magnetic cores attached to the sheet coils are provided with coil portions of the same coil pattern constituted by a multipole type on the front and back surfaces of sheet coils constituting at least one winding of the excitation windings and detection winding, and the electrical phase of one coil portion in each coil portion is made 180° different from the electrical phase of the other coil portion.

Abstract: Excitation windings 2X, 2Y and a detection winding configured in a multipolar mode are disposed coaxially with a fixed body, a plurality of sets (M1, M2) of intermediate rotating windings M1 . . . configured by a pair of winding portions Mx1, My1 . . . configured by the multipolar mode and with predetermined electrical phases D made different are disposed coaxially with a rotating body, and the winding portions in the same phase (Mx1 and Mx2, My1 and My2) of the plural sets of the intermediate rotating windings M1, M2 are connected so as to form closed circuits H . . . , respectively.

Abstract: Sheet coils formed in a ring shape to constitute excitation windings and detection winding, and magnetic cores attached to the sheet coils are provided with coil portions of the same coil pattern constituted by a multipole type on the front and back surfaces of sheet coils constituting at least one winding of the excitation windings and detection winding, and the electrical phase of one coil portion in each coil portion is made 180° different from the electrical phase of the other coil portion.

Abstract: A resolver for detecting the displacement amount of a passive body is provided with an excitation winding or a detection winding. The detection is based on a detection signal outputted from the detection winding as a result of an excitation signal inputted to the excitation winding. The excitation winding and/or the detection winding are composed of a combination of one or more sheet coils having one or more bore portions. The sheet coils are arranged at prescribed intervals in the lengthwise direction of a magnetic core to which the sheet coils are attached. A plurality of coil-storing grooves formed in a direction perpendicular to the lengthwise direction are provided in the core surface of the magnetic core. The coil portions of at least two portions of the respective sheet coils are accommodated in the coil-storing grooves.

Abstract: A resolver comprises excitation windings for receiving excitation signals and a detection winding for outputting a detection signal. Displacement of a passive member provided with the excitation windings or the detection winding is detected on the basis of the detection signal which varies with the displacement of the passive member. A modulated signal obtained through modulation of a high-frequency signal by an excitation signal is input to each of the excitation windings, and a detection signal is obtained through demodulation of a modulated signal output from the detection winding. Since the modulated signal obtained through modulation (amplitude modulation) of the high-frequency signal by means of the excitation signal is applied to the excitation windings, the number of turns in the excitation and the detection windings can be reduced.

Abstract: A method for manufacturing a coil is composed of the step of rolling a conductor of trapezoidal cross section or a conductor of rectangular cross section in the longitudinal direction thereof. An amount of deformation is gradually increased from a side of the conductor corresponding to the inner side of the coil toward a side of the conductor corresponding to the outer side of the coil. As a result, the conductor of trapezoidal cross section is formed into a coiled conductor of rectangular cross section, or the conductor of rectangular cross section is formed into a coiled conductor of trapezoidal cross section. In this way, rolling and coiling of the conductor are performed simultaneously to produce a coil.