Abstract: Disclosed are assemblies, systems, devices and methods, including an assembly to determine an angular position of a rotatable structure external to the assembly. The assembly includes a sensor including a rotatable member, a main winding set and at least one auxiliary winding, and also a coupling element to couple the sensor to the external rotatable structure to cause rotation of the rotatable member of the sensor in response to rotation of the external rotatable structure. Resultant voltages at the main winding set and at the at least one auxiliary winding are produced based, at least in part, on an angular position of the rotatable member of the sensor. The angular position of the external rotatable structure is determined based on the resultant voltages at the main winding set and at the at least one auxiliary winding.

Abstract: An inner core 62 and a resolver rotor 63 are secured to a rotary shaft 68 so that they are coaxial. A spacer 2, is provided between the inner core 62 and the resolver rotor 63. The spacer 2 and the inner core 62 are formed as a unit with separation, or space, between the spacer 2 and flange 41 of the inner core 62. The thickness of flange 41 is greater than the corresponding width of the corresponding part of the outer core, on which a rotary transformer input winding is wound. The resolver rotor 63 is a separate unit from the spacer 2 and the inner core 62, which facilitates automatic winding of the rotor. Grooves 3, 42 are formed in the spacer 2 and the flange 41 to accommodate a crossover wire 60.

Abstract: An electrical interconnection system (100) comprises a variable frequency rotary transformer (102) and a control system (104). The control system (104) adjusts an angular position of the rotary transformer (102) so that measured power (P1) transferred from a first electrical system (22) to a second electrical system (24) matches an inputted order power (P0). The rotary transformer (102) comprises a rotor assembly (110) and a stator (112), with the control system (104) adjusting a time integral of rotor speed over time. The control system (104) includes a first control unit (107) and a second control unit (108). The first control unit (107) compares the input order power P0 to the measured power P1 to generate a requested angular velocity signal &ohgr;0.

Abstract: The electrical machine, especially a three-phase generator, has a stationary stator (21); a rotatable rotor having an excitation coil (28), a rotary transformer (29) having a primary winding (30) and a secondary winding (31) on respective soft ferrite cores and magnetically coupled with each other via an air gap (38) and a control circuit (40) for loading the primary winding (30) of the rotary transformer (29) with an alternating current. The control circuit (40) includes an input-side current limiting circuit (46), whereby an integrated temperature control is obtained in cooperation with the soft ferrite cores of the primary and secondary windings according to the Curie effect.

Abstract: An electrical interconnection system (100) comprises a variable frequency rotary transformer (201) and a control system (104). The control system (104) adjusts an angular position of the rotary transformer (102) so that measured power (P1) transferred from a first electrical system (22) to a second electrical system (24) matches an inputted order power signal (P0). The controller limits the power requested by the power order signal based on measured voltages, e.g., the controller has a power-limit function which overrides the order power signal when a measured power exceeds a limit computed from the measured voltages. The limit function is a fraction of maximum theoretical power.

Abstract: A brushless resolver comprising a housing, a rotor rotatably mounted in the housing, a rotary transformer comprising a primary winding carried by the housing and secondary winding on the rotor and operatively associated with the primary winding, a resolver comprising a stator winding carried by the housing and a rotor winding on the rotor and operatively associated with the stator winding, characterized by an electromagnetic flux absorber in the housing between the rotary transformer and the resolver for absorbing leakage electromagnetic flux from the rotary transformer so as to reduce any deviation between the indicated electrical position of the rotor and the actual mechanical position of the rotor during each revolution of the rotor. The flux absorber comprises a copper ring between the rotary transformer primary winding and the resolver stator winding so that the leakage flux creates eddy currents in the ring thereby absorbing or reducing the leakage flux.

Abstract: A rotary converter machine which includes a stator with three-phase primary, and secondary windings, and a rotor mounted within the stator which includes a damping winding. The primary and secondary stator windings are arranged on a common stator pack and located in continuous stator slots, both windings extending over the whole axial length of the common stator pack. The converter machine provides a direct transfer of the electrical energy by flux linkage between the two windings. The rotor is driven by the rotating magnetic field either asynchronously, if a drum rotor is provided, or synchronously, if a salient-pole rotor is provided.

Abstract: An electromechanical conversion machine includes a 1-turn transformer primary winding comprising a rotating conductive member electrically connected to a stator conducting member. The rotating member moves within an alternating magnetic field. A nonrotating electromagnetic core is positioned in operative relationship with the primary winding. The core is surrounded by a multiturn secondary winding circuit to which output terminals are connected.

Abstract: A rotary differential transformer is provided which has a constant amplitude output the phase angle of which varies with the angular displacement of a rotor. The rotor contains a pair of core segments of magnetic material which serve to couple portions of first and second primary coils to a secondary coil. The primary coils are connected to AC sources 90.degree. out of phase with each other.

Abstract: A multipolar resolver is so constructed that the need of the conventionally indispensable coil on the resolver rotor is eliminated by providing a center coil on a stator, and 5n or 3n rotor poles and 4n stator poles are provided where n is a positive integer. Sine and consine coils are wound on the stator poles alternately, thus simplifying the construction of the multipolar resolver.