JP2014150703A - Resolver stator structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent penetration of leakage magnetic flux into an annular stator body from a motor, or the like, located on the outside of the annular stator body.SOLUTION: A resolver stator structure is configured to prevent penetration of external magnetic flux into an annular stator body (1), by a plurality of arcuate openings (1A) provided on the outside of each protruding magnetic pole (3) of the annular stator body (1).

Description

  The present invention relates to a resolver stator structure, and more particularly to a novel improvement for preventing magnetic fluxes from entering the ring-shaped stator from the outside by a plurality of arc-shaped openings provided outside the protruding magnetic poles of the ring-shaped stator body.

As a conventional resolver stator structure, for example, the configuration disclosed in Patent Document 1 can be cited as FIGS. 5 and 6.
That is, what is denoted by reference numeral 1 in FIG. 5 is a ring-shaped stator body, and a plurality of projecting magnetic poles 3 projecting inward are formed at predetermined angular intervals on the inner peripheral portion 2 of the ring-shaped stator body 1. A stator winding 4 is wound around each protruding magnetic pole 3.

Bolt fixing holes 5 formed of a plurality of elongated holes are provided at positions outside the projecting magnetic pole 3 of the annular stator body 1, and the annular stator body 1 is connected to one end of a motor (not shown) and a rotating body of an engine. When the annular stator body 1 is positioned in the circumferential direction, the bolt-shaped stator body 1 is rotated within the rotation range of the bolt fixing hole 5 when the annular stator body 1 is positioned in the circumferential direction. Was configured to perform positioning.
Moreover, although the literature name is not disclosed, as shown in FIG. 7, the ring-shaped stator body 1 that does not have the bottle fixing hole is also used.

US Pat. No. 6,838,804 B2

Since the conventional resolver stator structure is configured as described above, the following problems exist.
That is, when a resolver using the resolver stator structure 10 having the ring-shaped stator body 1 of FIG. 5 is mounted in the vicinity of the motor 11 of the vehicle as shown in FIG. 6, for example, the magnetic flux 13 from the motor coil 12 of the motor 11 Enters the protruding magnetic pole 3 from the outer edge of the ring-shaped stator body 1 and causes disturbance when a change in magnetic flux based on gap permeance between a rotor (not shown) and each protruding magnetic pole 3 is extracted as a two-phase resolver output signal. In some cases, the detection accuracy is lowered.
For this reason, the relationship between the resolver mounting position and the motor mounting position must be taken into account from the vehicle design stage, which greatly hinders the degree of freedom in vehicle design.
Further, in the resolver stator structure shown in FIG. 7, the outer edge of the ring-shaped stator body is in the state of a disc not provided with the bolt fixing hole 5 or the like, and is therefore equal to or more than the configuration of FIG. In addition, the structure is easily affected by the leakage magnetic flux 13 from the external motor 11 or the like.

  A resolver stator structure according to the present invention includes a ring-shaped stator body having a plurality of projecting magnetic poles projecting inward at predetermined angular intervals, and a plurality of curved stator-shaped bodies provided on the ring-shaped stator body and positioned outside the projecting magnetic poles. The arc-shaped opening is configured to prevent the magnetic flux from the outside of the ring-shaped stator body from entering the ring-shaped stator body by the arc-shaped opening, and the arc-shaped opening is a circle of the ring-shaped stator body. Only one piece is provided in each of the first to 490 degree regions obtained by dividing the circumference into four parts every 90 degrees, and the arc-shaped opening has a circumference of the annular stator body every 120 degrees. The arc-shaped opening is divided into two parts every 180 degrees around the circumference of the ring-shaped stator body. 1st to 2nd A configuration is provided only one each in 80 degrees in the region.

Since the resolver stator structure according to the present invention is configured as described above, the following effects can be obtained.
That is, a ring-shaped stator body having a plurality of projecting magnetic poles projecting inward at predetermined angular intervals, and a plurality of arc-shaped openings provided on the ring-shaped stator body and positioned outside the projecting magnetic poles and bent in an arc shape Since the arc-shaped opening prevents the magnetic flux from outside the ring-shaped stator body from entering the ring-shaped stator body, even if a resolver is placed near the leakage flux of the motor or the like, it receives from the motor or the like. Magnetic flux can be reduced, and the degree of freedom in layout design for vehicles and the like can be expanded.
Further, only one arcuate opening is provided in each of the first to 490 degree regions obtained by dividing the circumference of the ring-shaped stator body into four parts every 90 degrees, thereby providing four arcuate openings. The arrangement position of the motor and the like can be freely determined according to the position.
Further, only one arc opening is provided in each of the first to third 120 degrees regions obtained by dividing the circumference of the ring-shaped stator body into three portions every 120 degrees, so that three arc openings are provided. The arrangement position of the motor and the like can be freely determined according to the position.
Further, only one arc opening is provided in each of the first to second 180 degree regions obtained by dividing the circumference of the annular stator body into two parts every 180 degrees, so that the circumference of the annular stator body is obtained. Since arc-shaped openings are formed in almost all of them, the layout design of the resolver and the motor or the like becomes extremely easy.

It is a top view which shows the resolver stator structure by this invention. It is explanatory drawing which shows the relationship between the resolver stator structure of FIG. 1, and the leakage magnetic flux of a motor. It is a top view which shows the other form of FIG. It is a top view which shows the other form of FIG. It is a top view which shows the conventional resolver stator structure. It is explanatory drawing which shows the state which has arrange | positioned the motor close to the resolver stator structure of FIG. It is a top view which shows another conventional structure.

  An object of the present invention is to provide a resolver stator structure in which a plurality of arc-shaped openings provided outside each projecting magnetic pole of a ring-shaped stator body prevent entry of magnetic flux from the outside into the ring-shaped stator. .

Hereinafter, preferred embodiments of a resolver stator structure according to the present invention will be described with reference to the drawings.
The same reference numerals are used for the same or equivalent parts as in the conventional example.
In FIG. 1, reference numeral 1 denotes a disc-shaped ring-shaped stator body, and a plurality of projections projecting inward at predetermined angular intervals on an inner peripheral portion 2 of the ring-shaped stator body 1. A magnetic pole 3 is provided.

A stator winding 4 composed of a well-known excitation winding and output winding is wound around each protruding magnetic pole 3 by a winding machine (not shown).
In the outer position of each projecting magnetic pole 3 of the ring-shaped stator body 1, that is, the same position as the position where each bolt fixing hole 5 in FIG. 5 is formed, it bends in an arc shape and penetrates in the thickness direction. Arc-shaped openings 11 are formed, and each of the arc-shaped openings 11 is divided into first to 490-degree regions 12, 13, 14, and 15 formed by dividing the circumference of the ring-shaped stator body 4 every 90 degrees. One is provided.
A well-known variable reluctance type rotor (not shown) is rotatably disposed in the rotor hole 16 inside each projecting magnetic pole 3 of the annular stator body 1.

When a rotor (not shown) is disposed in the rotor hole 16 of the resolver stator structure 10 having the configuration shown in FIG. 1 and used as an inner rotor type variable reluctance resolver, the ring-shaped stator body 1 of FIG. Even in a state in which the motor 11 is disposed in the vicinity, the leakage magnetic flux 13 leaking from the motor coil 12 of the motor 11 tends to enter from the outer peripheral portion 18 of the annular stator body 1 toward the inner peripheral portion 2. However, since the magnetic resistance of the outer edge of the annular stator body 1 is significantly higher than that of the prior art (configuration of FIGS. 5 and 7) due to the presence of the arc-shaped opening 11, the leakage magnetic flux 13 is contained in the annular stator body 1. In other words, it is difficult to reach the protruding magnetic pole 3 side, and the magnetic influence on the stator winding 4 in each protruding magnetic pole 3 can be prevented. It is configured to.
Therefore, when a variable reluctance type resolver is configured using the resolver stator structure 10, a highly accurate two-phase resolver output signal with little influence of disturbance can be obtained.

Next, the resolver stator structure 10 shown in FIG. 3 is a configuration showing another form of the resolver stator structure 10 shown in FIG. 1, and the same parts as those in FIG. Only the differences from FIG. 1 will be described.
That is, in FIG. 3, the circumference of the annular stator body 1 is divided into first to third 120 degree regions 20, 21, and 22 divided into three parts every 120 degrees, and the first to third 120 degree areas 20. , 21 and 22 are provided with only one arcuate opening 1A.
Therefore, since the arc-shaped length of each arc-shaped opening 1A is formed longer than the length of each arc-shaped opening 1A in FIG. 1, the motor 11 is placed near the ring-shaped stator body 1 as shown in FIG. The degree of freedom in disposing is further increased.

Next, the resolver stator structure 10 shown in FIG. 4 is a structure which shows the other form of the resolver stator structure 10 of FIG. 1, The same code | symbol is attached | subjected to the same part as FIG. 1, and the description is abbreviate | omitted. Only the differences from FIG. 1 will be described.
That is, in FIG. 4, the circumference of the ring-shaped stator body 1 is divided into first and second 180 degree regions 30 and 31 divided into three parts every 180 degrees, and the first and second 180 degree areas 30 and 31 are divided. Each is provided with only one arcuate opening 1A.
Therefore, since the arc-shaped length of each arc-shaped opening 1A is formed longer than the length of each arc-shaped opening 1A in FIG. 1, the motor 11 is placed near the ring-shaped stator body 1 as shown in FIG. The degree of freedom in disposing is further increased.

  In the resolver stator structure according to the present invention, since the arc-shaped opening is provided outside each projecting magnetic pole of the annular stator body, the leakage magnetic flux from the motor is prevented from entering the annular stator body, and the mounting position of the motor with respect to the resolver is prevented. The degree of freedom can be increased.

DESCRIPTION OF SYMBOLS 1 Ring-shaped stator body 1A Arc-shaped opening 2 Inner peripheral part 3 Protruding magnetic pole 4 Stator winding 10 Resolver stator structure 11 Motor 12 Motor coil 13 Leakage magnetic flux 14 190 degree area 15 290 degree area 16 390 degree area 17 490 degree area 18 Outer part 20 1120 degree area 21 2120 degree area 22 3120 degree area 30 1180 degree area 31 2180 degree area

Claims (4)

  An annular stator body (1) having a plurality of projecting magnetic poles (3) projecting inward at a predetermined angular interval, and an arcuate shape located on the outer side of each projecting magnetic pole (3) provided on the annular stator body (1) A plurality of arc-shaped openings (1A) that bend in a direction, and prevent the magnetic flux from outside the ring-shaped stator body (1) from entering the ring-shaped stator body (1) by the arc-shaped openings (1A). A resolver stator structure characterized by comprising.   Only one arc opening (1A) is provided in each of first to 490 degree regions (14 to 17) obtained by dividing the circumference of the annular stator body (1) into four parts every 90 degrees. The resolver stator structure according to claim 1.   Only one arcuate opening (1A) is provided in each of first to third 120 degree regions (20 to 21) obtained by dividing the circumference of the annular stator body (1) into three parts every 120 degrees. The resolver stator structure according to claim 1.   Only one arc opening (1A) is provided in each of first to second 180 degree regions (30 to 31) obtained by dividing the circumference of the annular stator body (1) into two parts every 180 degrees. The resolver stator structure according to claim 1.

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