JP6023938B2 - Resolver structure - Google Patents

Description

  The present invention relates to a resolver structure, and in particular, a plurality of arc-shaped openings are provided in a ring-shaped rotor body that is rotatably disposed outside each protruding magnetic pole of a ring-shaped stator body, and leakage magnetic flux from the outside of the ring-shaped rotor body is caused by the ring-shaped rotor. The present invention relates to a new improvement for preventing intrusion into the body.

As a conventional resolver 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 1a 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 annular stator body 1 that does not have the bolt fixing hole is also used.

Moreover, although all the above-mentioned conventional structures are an inner rotor type | mold, the outer rotor type conventional structure of FIG.8 and FIG.9 which does not disclose the literature name is also employ | adopted.
That is, in FIG. 8, a plurality of protruding magnetic poles 3 are provided outward at predetermined angular intervals on the outer periphery of the annular stator body 1, and a stator winding 4 is wound around each protruding magnetic pole 3.
An annular rotor body 20 is connected to a rotating body (not shown) and is rotatably disposed at the outer position of each protruding magnetic pole 3.
The inner peripheral wall 20B of the ring-shaped rotor body 20 is not a perfect circle, but is formed in a circular shape having a plurality of bent recesses 21.

Therefore, in the outer rotor type resolver structure 10A of FIG. 8 described above, since the plurality of recesses 21 are formed in the inner peripheral wall 20B of the annular rotor body 20, when the annular rotor body 20 rotates, each of the protruding magnetic poles 3 and the inner peripheral wall 20B of the annular rotor body 20 are configured such that the gap G is maximized at a position corresponding to the recess 21 and is minimized at a position where the recess 21 is not formed.
Accordingly, in the case of the configuration shown in FIG. 8, the known 4X (X is a shaft angle multiplier) due to the four recesses 21 due to a known change in gap permeance caused by the change in the gap G in accordance with the rotation of the annular rotor body 20. This resolver output signal can be obtained.

US Pat. No. 6,838,804 B2

Since the conventional resolver structure is configured as described above, the following problems exist.
That is, FIG. 5 shows an inner rotor type resolver structure. When this resolver structure is disposed in the vicinity of the motor 11 as shown in FIG. 6, the leakage magnetic flux 13 from the motor coil 12 of the motor 11 is caused by the ring-shaped stator body 1. Intrusion into the projecting magnetic pole 3 from the outer edge of the magnetic field becomes a cause of disturbance when the resolver output signal is taken out, resulting in a decrease in detection accuracy.
Also, in the case of the resolver structure shown in FIGS. 8 and 9, since no hole or the like is formed in the annular rotor body 20, the motor 11 is disposed in the vicinity of the annular rotor body 20 as shown in FIG. 9. In this case, the leakage magnetic flux 13 of the motor coil 12 penetrates inward from the outer edge of the ring-shaped rotor body 20 and acts as a disturbance on the stator winding 4 of each protruding magnetic pole 3, resulting in a decrease in detection accuracy.
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.

The resolver structure according to the present invention includes a ring-shaped stator body having a plurality of projecting magnetic poles projecting outward at predetermined angular intervals, a stator winding wound around each projecting magnetic pole, and an outer side of each projecting magnetic pole. And a rotatable ring-shaped rotor body, a plurality of arc-shaped openings provided in the ring-shaped rotor body and bent in an arc shape, and one or a plurality of recesses formed in an inner peripheral wall of the ring-shaped rotor body. In the configuration in which the magnetic flux from the motor outside the ring-shaped stator body is prevented from entering the ring-shaped rotor body by the arc-shaped opening, the width along the short direction with respect to the longitudinal direction of the arc-shaped opening is the width of the arc-shaped opening. first ends, to the vicinity of the second end portion does not change is a configuration wherein the motor of the motor coil in the vicinity of the annular rotor body is to be positioned, also said arcuate opening, First to fourth formed by 4 dividing the circumference of the serial ring rotor body every 90 degrees Only one each is provided in the 90-degree region, and the arc-shaped opening is formed by dividing the circumference of the ring-shaped rotor body into three parts every 120 degrees. Only one each is provided in the 120 degree region, and the arcuate opening is formed by dividing the circumference of the ring-shaped rotor body into two parts every 180 degrees. Only one of each is provided in the 180 degree region.

Since the resolver 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 outward at a predetermined angular interval, a stator winding wound around each projecting magnetic pole, and disposed outside each projecting magnetic pole and rotating The ring-shaped rotor body includes a free ring-shaped rotor body, a plurality of arc-shaped openings provided in the ring-shaped rotor body and bent in an arc shape, and one or a plurality of recesses formed in an inner peripheral wall of the ring-shaped rotor body. The magnetic flux received from the motor or the like can be reduced even if the resolver is disposed at a position close to the leakage flux of the motor or the like by preventing the magnetic flux from the motor from entering the annular rotor body by the arc-shaped opening. It is possible to increase the degree of freedom in designing the layout of vehicles and the like.
The arc-shaped openings are first to fourth parts formed by dividing the circumference of the ring-shaped rotor body into four parts every 90 degrees. By providing only one each in the 90-degree region, the arrangement position of the motor and the like can be freely determined in accordance with the positions of the four arc-shaped openings.
The arc-shaped openings are first to third parts formed by dividing the circumference of the annular rotor body into three parts every 120 degrees. By providing only one each in the 120-degree region, the arrangement position of the motor and the like can be freely determined in accordance with the positions of the three arc-shaped openings.
Further, the arc-shaped opening is formed by dividing the circumference of the ring-shaped rotor body into two portions every 180 degrees. By providing only one each in the 180-degree region, arc-shaped openings are formed in almost the entire circumference of the stator body, so that the degree of freedom in layout design of the resolver and the motor can be increased. .

It is a top view which shows the resolver structure by this invention. It is explanatory drawing which shows the relationship between the resolver 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 inner rotor type ring-shaped stator body. It is explanatory drawing which shows the relationship between the ring-shaped stator body of FIG. 5, and the leakage magnetic flux of a motor. It is a top view of the ring-shaped stator body which shows the other prior art example of FIG. It is a top view which shows the conventional outer rotor type resolver structure. It is explanatory drawing which shows the relationship between the resolver structure of FIG. 8, and the leakage magnetic flux of a motor.

  According to the present invention, a plurality of arc-shaped openings are provided in a ring-shaped rotor body rotatably disposed outside each projecting magnetic pole of the ring-shaped stator body, and leakage magnetic flux from the outside of the ring-shaped rotor body enters the inside of the ring-shaped rotor body. It is an object of the present invention to provide a resolver structure that prevents this.

Hereinafter, preferred embodiments of a resolver structure according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part.
In FIG. 1, what is indicated by reference numeral 1 is a ring-shaped stator body having a circular shape as a whole, and a plurality of protrusions protruding radially outward are formed on the outer peripheral portion 1b of the ring-shaped stator body 1. The magnetic poles 3 are formed at a predetermined angular interval.
Each protruding magnetic pole 3 is wound with a stator winding 4 composed of a well-known excitation winding and output winding.

A plate-shaped ring-shaped rotor body 20 is provided on the outside of each protruding magnetic pole 3 and is rotatable, and the ring-shaped rotor body 20 is formed with four arc-shaped openings 20A having an arc shape. ing.
Each arcuate opening 20A is a first to a fourth that is formed by dividing the circumference of the annular rotor body 20 into four portions every 90 degrees. Only one each is provided in each of the 90 degree regions 14, 15, 16, and 17.

  Four concave portions 21 are formed in the inner peripheral wall 20B of the annular rotor body 20 at a predetermined angular interval, that is, at an interval of 90 degrees, and the concave portions 21 are formed with openings between the arc-shaped openings 20A. It is formed corresponding to the non-arc-shaped opening 22 which is a non-region.

Each recess 21 has a first gap G ₁ between the outer end 3 a of each protruding magnetic pole 3 and a second gap G ₁ between the inner peripheral wall 2 other than the recess 21 and the outer end 3 a of each protruding magnetic pole 3. than ₂ are large, the magnetic due to an annular rotor body 20 in the first gap G ₁ and magnetic coupling degree of the protruding poles 3, the first gap G ₁ other than the inner peripheral wall 20B and the projecting magnetic pole 3 It is smaller than the degree of mechanical coupling.
Therefore, in the resolver structure 10A of FIG. 1 described above, when the ring-shaped rotor body 20 is connected to a rotating member of a device (not shown) and rotates, 4X (X is a shaft double angle) using the above-described four recesses 21 is used. A known resolver output signal can be obtained via an output winding (not shown) of each stator winding 4 of each protruding magnetic pole 3.

The resolver structure 10A configured as shown in FIG. 1 is mounted in, for example, an engine room of an automobile or the like, and the motor coil 12 of the motor 11 is positioned in the vicinity of the annular rotor body 20 of the resolver structure 10A. In this case, since the motor coil 12 is disposed on the outer side corresponding to the arcuate opening 20A, the leakage magnetic flux 13 from the motor coil 12 is caused by the presence of the arcuate opening 20A, as shown in FIG. Intrusion into the body 20 is prevented, and fluctuation of the resolver output signal due to disturbance can be prevented.
The width W along the short direction B with respect to the longitudinal direction of the arc-shaped opening 20A is formed so as not to change up to the positions near the first and second end portions 20Aa and 20Ab at both ends of the arc-shaped opening 20A. .

The resolver structure 10A of FIG. 3 shows another form of the resolver structure 10A of FIG. 1. In FIG. 1, the arc-shaped openings 20A are formed every 90 degrees, but in FIG. 3, the arc-shaped openings 20A are formed. 1st to 3rd Since only one is formed in each of the 120-degree regions 30, 31, 32, the angular width of the arc-shaped opening 20A is greatly expanded from 90 degrees to 120 degrees, so that the motor 11 is mounted on the resolver structure 10A. Can greatly improve the degree of freedom.

The resolver structure 10A shown in FIG. 4 shows another form of the resolver structure 10A shown in FIG. 1. In FIGS. 1 and 3, the arc-shaped openings 20A are formed every 90 degrees and 120 degrees. 4, the arc-shaped opening 20 </ b> A is first and second By forming only one for each of the 180 degree regions 40 and 41, the angular width of the arc-shaped opening 20A can be greatly expanded, and the degree of freedom of mounting the motor 11 to the resolver structure 10A can be greatly improved. .

In the resolver structure according to the present invention, the arc-shaped opening formed in the ring-shaped rotor body can prevent the leakage magnetic flux from the outside from entering the ring-shaped rotor body, and the degree of freedom in the arrangement configuration of the motor with respect to the resolver structure. It can be greatly improved.

DESCRIPTION OF SYMBOLS 1 Ring-shaped stator body 1b Outer peripheral part 2 Inner peripheral wall 3 Protruding magnetic pole 4 Stator winding 10A Resolver structure 14-17 1st-490 degree area | region 20 Ring-shaped rotor body 20A Arc-shaped opening 21 Recessed part 22 Non-arc-shaped opening 30-32 First-first the 3120 ° region 40 and 41 first, second 2180 degrees region G _{1, G 2} first, second gap

Claims (4)

An annular stator body (1) having a plurality of projecting magnetic poles (3) projecting outward at a predetermined angular interval, a stator winding (4) wound around each projecting magnetic pole (3), and each projecting magnetic pole A ring-shaped rotor body (20) which is disposed outside (3) and is rotatable, a plurality of arc-shaped openings (20A) which are provided in the ring-shaped rotor body (20) and bend in an arc shape, and the ring-shaped rotor body One or a plurality of recesses (21) formed in the inner peripheral wall (20B) of the ring-shaped stator body (20 ), and the ring-shaped rotor body (20 of magnetic flux from the motor (11) outside the ring-shaped stator body (1). the) in entry into the the resolver structure to prevent by the arcuate opening (20A),
The width (W) along the short direction (B) with respect to the longitudinal direction (A) of the arc opening (20A) is in the vicinity of the first and second ends (20Aa, 20Ab) at both ends of the arc opening (20A). A resolver structure characterized in that the motor coil (12) of the motor (11) is positioned in the vicinity of the annular rotor body (20) without changing the position. The arcuate opening (20A) is a first to a fourth that is formed by dividing the circumference of the annular rotor body (20) into four parts every 90 degrees. The resolver structure according to claim 1, wherein only one of each is provided in the 90 degree region (14 to 17). The arcuate opening (20A) is a first to a third part formed by dividing the circumference of the annular rotor body (20) into three parts every 120 degrees. 2. The resolver structure according to claim 1, wherein only one of each is provided in a 120 degree region (30 to 32). The arc-shaped opening (20A) is formed by dividing the circumference of the annular rotor body (20) into two parts every 180 degrees. 2. The resolver structure according to claim 1, wherein only one of each is provided in the 180 degree region (40 to 41).

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