Abstract: A terminal for a resolver that operates in a high temperature environment is presented. The terminal includes a terminal block having a through groove. The through groove provides a resistive welder with access to flat terminals mounted on the terminal block. Resistive welding the stator coil wire of the resolver to the flat terminals is less complicated than soldering the stator coil wire to the flat terminals and provides a connection more able to withstand high temperatures.

Abstract: A VR resolver includes a rotor having a rotary shaft portion and a salient pole portion formed integrally. The salient pole portion assumes an arbitrary salient pole profile. Two or more salient pole portions may be formed on the rotary shaft portion along the length of the rotary shaft portion. The salient pole portion may be a bulged portion of the rotary shaft portion. The bulge portion may assume a rounded shape or a plate-like shape.

Abstract: A multiplex resolver includes m resolver units disposed in tandem each comprising a rotor and a stator, where m is an integer not less than 2. The stator has a stator yoke, a plurality of stator magnetic poles projecting from the yoke, and excitation and output windings applied to the stator magnetic poles. The number of the stator magnetic poles corresponds to a shaft angle multiplier n× (n is an integer not less than 1) of the resolver. The rotor has n salient poles in accordance with the shaft angle multiplier n×. The respective stators of the resolver units are connected together such that the stator magnetic poles of the stator of one resolver unit do not overlap the stator magnetic poles of the stator of another resolver unit, as viewed in the axial direction.

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: A rotation angle sensor that outputs different axis combination angles as absolute position information by forming a range of salient poles that have different axis combination angles from each other on the rotor and the stator.

Abstract: A stator device which prevents the formation of varnish accumulations on jumper wires, thereby preventing jumper wire breakage due to temperature variations. A gap is created between the jumper wire and the stud located on the stator body. When varnish is applied to the stud and the jumper wires, excess varnish flows through the gap and pools underneath. Moreover, when there is a significant accumulation of varnish in the gap, the varnish will flow off from the edge of the stator body.

Abstract: A variable reluctance resolver has a rotor with magnetic poles with 2× or greater axis combination angles, and is structured so that reliable and accurate zero point detection can be carried out. Concave and convex portions are provided on at least two, but fewer than all, of the magnetic poles of the rotor, and the zero point detection winding is provided on a plurality of electrical poles of the stator. Two or more zero point detection signals are generated simultaneously by a plurality of zero point detection windings. Therefore, even if a portion of the zero point detection signals is lost, the zero point can still be identified based on the correlation between the two or more zero point detection signals.

Abstract: A double variable reluctance resolver in which a redundancy is given to a variable reluctance resolver to improve reliability. The double variable reluctance resolver also functions as a multiple speed resolver system.

Abstract: A deviation angle detector enlarges the application range by enlarging the detectable deviation angle range. The deviation angle detector has two resolvers, which have rotors, stators, and single excitation windings and multiple output windings that are coiled around the stators. The difference in rotation angles of the resolvers is detected as a deviation angle &Dgr;&THgr; by calculating the output signal that corresponds to the rotation angles of the resolvers digitally or in analog. The corresponding output windings of the resolvers are connected in series and the output signals are extracted from the serially connected output windings and calculated digitally or in analog.

Abstract: A stator device which prevents the formation of varnish accumulations on jumper wires, thereby preventing jumper wire breakage due to temperature variations. A gap is created between the jumper wire and the stud located on the stator body. When varnish is applied to the stud and the jumper wires, excess varnish flows through the gap and pools underneath. Moreover, when there is a significant accumulation of varnish in the gap, the varnish will flow off from the edge of the stator body.

Abstract: An output terminal is provided at the middle point of each of output windings 112X and 112Y of a resolver 10. A difference between a voltage V2X (V2Y), between one of the end terminals and the middle point of the output winding, and a voltage V1X (V1Y), between the other end terminal and the middle point of the output winding, is detected by a difference voltage detection circuit 101, and supplied to a logical summing circuit 126 via a rectifier circuit 124 and a comparator circuit 125. In accordance with an output from the logical summing circuit 126, a fault of the windings, such as short-circuiting or the like, can be detected even at a specific rotation angle of the rotor. Thus, a resolver in which a fault thereof can be easily detected, as well as a resolver fault detection circuit, can be provided.

Abstract: A spacer 2 is provided between an inner core 62 and a resolver rotor 63, which are respectively attached to a rotary shaft 68. A cutout groove 42 is formed at a flange 41 of the inner core 62. A fixing groove 3 and the cutout groove 42 are aligned in the rotary shaft 68 direction. The rotary transformer output winding 65 and resolver excitation windings 64 are soldered and electrically connected by a crossover 60. The crossover 60 is covered with an insulating tube 6. The crossover 60 is fitted into the fixing groove 3. The fixing groove 3 and an inter-magnet space 631 are misaligned in the circumferential direction of the rotor 63. Thus, a frictional force is applied between the insulating tube 6 and the fixing groove 3, which secures the crossover 60 and prevents the crossover 60 from escaping from the fixing groove 3.

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: A disconnect protection structure for a rotary transformer type resolver includes insulating tube units (611, 612, 613) that house a crossover (60) connecting a rotary transformer output winding (65) and resolver excitation windings (64). A left end (611a) of the protection tube (611) and a right end 613b of the protection tube (613) are secured to the crossover (60). Ends of the insulating tube units (611, 612, 613) other than the secured ends are not secured, and a gap is provided between adjacent insulating tube units. As a result, the unsecured ends are capable of absorbing a force that would otherwise cause the crossover (60) to disconnect from the rotary transformer output winding (65) and/or the resolver excitation windings (64) when the protection tube units (611, 612, 613) and the crossover (60) thermally expand or contract.

Abstract: A stator assembly is formed by sandwiching a circular stator core made of soft magnetic plates from the both sides with a first magnetic-pole assembly having a part mounting section and a second magnetic-pole assembly. The stator core, the first magnetic-pole assembly, and the second magnetic-pole assembly are surrounded by a synthetic resin in a manner such that a surface at which a magnetic-pole tooth of the stator core face a rotor is exposed. The part mounting section has a plurality of holes in each of which a pin (not shown) penetrates, and holes also penetrating in the stator core at positions corresponding to the outside of the circumference of the first magnetic-pole assembly. The first magnetic-pole assembly and the part mounting section, and the second magnetic-pole assembly are fitted with the synthetic resin surrounding through the plurality of through holes provided for the stator core.

Abstract: Provision of a stator core 2, one insulating member 5 and another insulating member 6, and a lead line terminal block 8 for connecting the lead line 9 of a stator coil wire, where said stator core 2 is fabricated with a protrusion part 11 that has, on its inside, an indentation part 12 into which said lead line terminal block 8 is fitted. The lead line terminal block 8 not only has a through groove, but also has a mating protrusion part 24 that mates with a through hole 26 that is fabricated in the other insulating member 6, and multiple lead line fastening grooves 32.

Abstract: This invention is to provide an improved device for measuring torque with high accuracy and a simple structure. The device is so constructed that one end of a torsion bar (which is twisted depending on an actual steering operation) is combined with one end of an input shaft, while the other end of the torsion bar is combined with one end of an output shaft. The other end of the input shaft is combined with a steering wheel, while the other end of the output shaft is connected to vehicle wheels. A rotor of a first resolver comprising the rotor having a resolver excitation winding and a stator having a resolver output winding is fixed to the input shaft (one end of which is combined with the steering wheel). A rotor of a second resolver comprising the rotor having a resolver excitation winding and a stator having a resolver output winding is fixed to the output shaft (the other end of which is connected to the vehicle wheels).

Abstract: A stator device which prevents the formation of varnish accumulations on jumper wires, thereby preventing jumper wire breakage due to temperature variations. A gap is created between the jumper wire and the stud located on the stator body. When varnish is applied to the stud and the jumper wires, excess varnish flows through the gap and pools underneath. Moreover, when there is a significant accumulation of varnish in the gap, the varnish will flow off from the edge of the stator body.

Abstract: A stator stack and stator jig assembly provide a consistent amount of slack in stator coil wires without increasing the complexity of coil-winding machines or adding production steps, and prevent crossing of the stator coil wires in the slack areas. A stator stack having magnetic pole teeth is mounted in a stator installation jig, and the ends of slack forming plates having grooves are made to project above the top surface of the stator stack to thrust stator coil wires upwardly. The coil-winding machine winds stator coil wires around the magnetic pole teeth, and after the stator coil wires are wound, the ends of the stator coil wires are passed through grooves in the ends of the plates to output pins. The coil-winding machine wraps the ends of the stator coil wires around the output pins. On removing the stator from the stator installation jig, the parts of the stator coil wires which where thrust upward become slack areas.

Abstract: A slack-forming mechanism for stator coils that is able to impart slack of appropriate size to the stator coil without imposing an excessively heavy burden on the coiling machine. The slack-forming mechanism includes a coiling machine attachment jig having a protruding member that passes through a clearance formed between a stator body and connector, and has a top edge positioned higher than a clearance pass-through part of a stator coil. As it is possible to form slack in the stator coil without changing the configuration of the coiling machine, deficiencies in prior art slack-forming mechanisms are overcome such as the difficulty of maintaining uniform slack amounts, and unreliability. Moreover, since design-related restrictions are few, an adequately large slack is imparted to the stator coil to adequately suppress breakage of the stator coil induced by temperature change.