JP2991748B2 - Motor stator core - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stator core of an electric motor used for driving a fan of home electric appliances.

2. Description of the Related Art In recent years, automation of a motor manufacturing process has been rapidly advancing due to a rise in labor costs, and a structure that facilitates automation of a motor has been demanded.

Conventionally, the stator core of this type of motor has generally been configured as shown in FIGS. That is, as a method for facilitating winding winding, the tooth core 110 has a plurality of teeth 112 radially arranged outside a rotor hole 111 in which a rotor (not shown) enters. It is connected to the outer periphery of the rotating hole 111 by a bridging portion 113, and a winding 114
Is formed as a slot 115 serving as a space in which is wound and stored. The outer periphery of the tooth 112 has a protrusion 116 projecting sideways.
An opening 117 for winding the winding 114 around the slot 115 is formed between the adjacent projection 116 and the adjacent projection 116. Then, a convex portion 119 is provided on the inner peripheral side of the annular yoke core 118, the winding 114 is wound around the slot 115 from the opening 117, and the convex 119 is press-fitted into the opening 117. And was configured as a stator.

In such a conventional configuration, when the A-phase winding 114A and the B-phase winding 114B of the poles are sequentially wound in order from the opening 117 outside the tooth core 110, respectively, Slot 11 wound first
The coil end portion of the A-phase winding 114A housed in 5A closes a part of the inner peripheral side of the slot 115B in which the B-phase winding 114B is housed, thereby reducing the effective slot space and winding the B-phase winding. line
There was a problem that the winding amount of 114B was reduced.

The present invention solves the above-mentioned problems, and the first winding A
The coil end of the phase winding reduces the blockage of the slot space for storing the B-phase winding, greatly expanding the space where the winding can be stored, and equalizing the magnetic path length of each pole for each phase. It is a first object of the present invention to provide a stator core of a motor in which the magnetomotive force of each pole of each phase is made uniform by setting. The second purpose is to increase the slot space in which the B-phase winding can be stored and minimize the increase in the length of the magnetic path through which the magnetic force is generated by exciting the A-phase winding and the B-phase winding. It is an object of the present invention to provide a stator core of a motor in which a reduction in motor efficiency is reduced.

Means for Solving the Problems According to the present invention, in order to achieve the first object, a first means is to provide a stator core having a number of slots of 2 for each pole and each phase substantially radially around the outer periphery of a rotor hole. Tooth core having a plurality of teeth and winding a winding, and a yoke core forming a magnetic path, and the yoke core is partially formed around a periphery of a slot of the tooth core. The toothed iron core is fitted to the outer periphery of the toothed core while being fitted into the opening. A short-phase winding A-phase winding is directly wound inside the slot of the toothed iron core. In an adduction type electric motor having a stator in which a short-phase winding B-phase winding is wound directly outside the slot at a position separated by 90 degrees in electrical angle from the wire, the A-phase winding of each pole is surrounded. Of the three teeth, the two teeth at both ends are provided in an S-shape or inverted S-shape, and the S-shaped or inverted S-shaped teeth are oriented in a direction substantially perpendicular to the central tooth. A winding extending around the entire A-phase winding winding slot, since an extension of the perpendicular direction intersects the central tooth inside the radial center point of the central tooth. However, the stator core of the motor is set so that only a small part of the slot for winding the B-phase winding is closed and most of the slot is left as a windable space.

Further, a second means for achieving the second object is to wind a stator core having a number of slots of two for each pole and each phase, and having a plurality of teeth provided substantially radially on the outer periphery of the rotor hole. The core is divided into a tooth core for winding a wire, and a yoke core forming a magnetic path. A short phase winding A-phase winding is wound directly inside the slot of the tooth core, and the A-phase winding is electrically connected to the outer circumference of the iron core by 90 degrees.
An adduction type motor having a stator in which a short-phase winding B-phase winding is directly wound around the outside of the slot at a position separated by degrees.
Of the three teeth surrounded by the A-phase winding of each pole, two teeth at both ends are provided in an S-shape or an inverted S-shape, and the S-shaped or the inverted S-shaped tooth is a central tooth. A straight line portion that intersects at an acute angle with respect to an extension line in the inner circumferential direction, and a direction in which a point where the extension line of the center line intersects the straight line portion is closer to the center than the center of the rotor hole circle. The configuration is such that even if the winding is wound around the A-phase winding winding slot, only a part of the B-phase winding winding slot is closed and a winding-possible space can be left. Of the stator core of the electric motor described above.

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, in the manufacturing process, an A-phase winding which is firstly wound in a manufacturing process is wound around an inner peripheral side of a tooth core, and is later wound straight. The B-phase winding to be wound is biased and wound around the outer periphery of the tooth core, and bent portions provided at two ends of the S-shaped and inverted S-shaped teeth at both ends surrounded by the B-phase winding. The position of is that the straight line connecting the bent parts of the teeth at both ends surrounding the A-phase winding is inside the center point of the straight line connecting the outer circumference and the inner circumference of the tooth core in the center tooth in the radial direction. , So that even if the A-phase winding is fully wound up to the storage limit,
The amount of closing the phase winding slot is negligible. Since the depths of all the slots are set to be equal, the lengths of the magnetic paths of each phase and each pole are all equal.

According to the configuration of the second means, two teeth at both ends of the plurality of teeth surrounding the A-phase winding and the B-phase winding are linear,
Since the intersection of the center lines of the two teeth is provided so as to be inclined in a direction closer to the center of the circle of the rotor hole, the A-phase winding receiving slot is enlarged on the inner peripheral side of the tooth core and B The outer peripheral side of the phase winding storage slot is enlarged, so that the slot area that can actually store the winding, especially the effective area of the slot that stores the B-phase winding wound later is reduced. In addition, since the inclined teeth are linear, an increase in the magnetic path length through which a current flows through the winding and through which the generated magnetic flux passes can be minimized.

Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

As shown in the figure, a plurality of teeth 3 are arranged almost radially, and a rotor hole 2 is formed by a bridging part 4 connecting the inner peripheral edges of these teeth 3 in a circular shape. A slot 7 serving as a space for accommodating a winding is provided between the three,
An opening 8 for directly winding a winding around the slot 7 at the outer peripheral edge
The toothed core 1 is formed by laminating a plurality of core plates 5 provided with. The tooth core 1 is insert-molded with an insulating material 6 having a ring-shaped rising portion on the inner peripheral surface, is insulated, and is firmly held integrally. Of the three teeth surrounded by the A-phase winding 9A wound directly from the opening 8 and wound on the inner peripheral side of the slot 7, two teeth 3, 3 at both ends are located near the outer peripheral edge. The bent portion 3a is bent in a direction in which the teeth 3, 3 are brought closer to each other on the inner peripheral side, and the position of the bent portion 3a is
A straight line connecting a and 3a is set so as to be orthogonal to the tooth 3 'located at the center between the two teeth 3 and 3 below the radial center point O of the 3'. I have. After the A-phase winding 9A winding phase, the A-phase winding and the electrical angle 90
A B-phase winding 9B is wound around the outer periphery of the slot 7 at a distance from the slot 7, and thereafter, an annular yoke core 10 is wound around the outer periphery of the tooth core 1.
To form a stator core.

In the manufacturing process, the stator core having the above configuration
The phase winding 9A is first wound straight from the opening 8 and is housed in the A-phase winding housing slot 7A surrounding the teeth 3, 3 and 3 '. Are bent in the direction approaching each other, so that the A-phase winding 9A is housed biasedly on the inner peripheral surface. Next, the B-phase winding 9B is wound around the B-phase winding accommodating slot 7B, and the teeth 3, 3 are formed so as to be away from each other on the outer peripheral side, that is, the teeth 3, which are surrounded by the B-phase winding 9B, As for 3, the shape becomes closer to each other at the outer periphery,
The B-phase winding 9B is accommodated in the outer periphery side.

As described above, when the A-phase winding 9A and the B-phase winding 9B are wound in series, a force acts in a direction in which they are separated from each other.
The coil end of the A-phase winding 9A does not hinder the winding of the B-phase winding 9B, and the workability of the winding is improved.

Further, the positions of the bent portions 3a, 3a formed on the surrounding teeth 3, 3 of the A-phase winding 9A are indicated by a straight line connecting the bent portions 3a, 3a with each other at the center between the teeth 3, 3. Is set so as to be orthogonal to the tooth 3 'located at the inner side from the radial center point of the tooth 3', so that the A-phase winding 9A can be stored in the A-phase winding storing slot 7A. Even if the A-phase winding 9A is fully wound, that is, wound to the position of the bent portion 3a,
Slot B for storing the B-phase winding, where the coil end of the coil is closed
3 is very small as shown in FIG. 3, and the space in which the winding of the B-phase winding 9B can be stored is greatly increased.

As shown in FIG. 1, the teeth 3, 3 are provided with 3a near the outer peripheral edge and a bent portion 3b near the inner peripheral side, and the depths of all the slots 7 are set to be equal. Thus, the length of the magnetic path through which the current flows through the winding of each phase and through which the generated magnetic flux passes is substantially equal.

The bent portions 3a provided on the teeth 3, 3 may be provided with bent portions 3b not only on the outer peripheral edge but also near the inner peripheral side as shown in the first part. This will further contribute to the separation and the expansion of the winding storage space.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are provided with the same symbols, and detailed description is omitted. As shown in the figure,
The tooth core 1 has the same configuration as that of the first embodiment, but two teeth 3 at both ends of the surrounding teeth 3 of the A-phase winding 9A (or the B-phase winding 9B) The only difference is that the intersection of the center lines of the two teeth 3 is inclined in such a direction that O ′ comes closer to the center O of the rotor hole 2.

In the above configuration, similarly to the embodiment of the first means, the previously wound A-phase winding 9A is biased toward the inner peripheral side of the A-phase winding storage slot 7A, and the coil end portion thereof is B
Part of the inner circumference of the phase winding storage slot 7B is closed, and the area of the B phase winding storage slot 7B is increased toward the outer circumference, so that the B phase winding 9B is biased toward the outer circumference. Is done. Also,
Since the two teeth 3 at both ends of the surrounding teeth 3 of the A-phase winding 9A or the B-phase winding 9B are linear, an increase in the length of the magnetic path through which a current flows and a magnetic flux generated by passing a current through the windings does not occur. Minimized.

In the embodiment, as shown in FIG. 1, the number of teeth around which the winding is wound is three. However, the number of teeth is not limited to three, and a larger number of teeth may be used. The effect is recognized.

Further, in the embodiment, the stator core of 4 poles and 16 slots is provided with a short section winding, and all the inner peripheral edges of each core plate have a bridging portion. The present invention is applicable to the number of slots and the number of bridging portions, and all of them have the effect.

According to the present invention, it is clear from the above embodiments that the A-phase winding to be wound first is wound on the inner peripheral side of the A-phase winding accommodating spar, and the A-phase winding is wound later. The B-phase winding to be wound is housed on the outer peripheral side of the slot for storing the B-phase winding, and the coil end portion of the A-phase winding does not obstruct the winding of the B-phase winding. The work efficiency in the winding step can be improved.

Furthermore, even if the A-phase winding is wound to the maximum extent that can be stored in the A-phase winding storage slot, the area of the B-phase winding storage slot in which the coil end of the A-phase winding is closed is very small. The B-phase winding can also be wound to the extent that it can be stored in the B-phase winding storage slot, and the performance of the electric motor can be greatly improved.

Furthermore, since the depths of all the slots for accommodating the A-phase winding and the B-phase winding are configured to be equal, the length of the magnetic path of each pole of each phase becomes substantially equal, and the magnetomotive force generated by each pole winding of each phase is reduced. It is possible to provide a stator core of a motor that is uniform and prevents occurrence of abnormal vibration and the like.

The two teeth at both ends of the teeth surrounded by the winding are linear, and the intersection of the center lines of the two teeth is provided so as to be inclined in a direction closer to the center of the circle of the rotor hole. Therefore, the A-phase winding to be wound first is wound on the inner side of the slot for storing the A-phase winding, and the B-phase winding wound straight is wound on the outer side of the slot for storing the B-phase winding. The motor that is housed and the coil end of the A-phase winding does not easily hinder the winding of the B-phase winding, and at the same time, the increase in the passage of the magnetic flux is minimized and the decrease in the motor efficiency of the motor is minimized. Stator core can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a tooth core of a stator core according to a first embodiment of the present invention, FIG. 2 is a plan view showing a partial cross section of the stator core, and FIG. FIG. 4 is a half sectional side view of the stator core, and FIG.
FIG. 6 is a plan view of a tooth core of a stator core according to a second embodiment of the present invention, FIG. 6 is a plan view showing a state where a part of a winding is applied to the stator core, and FIG. FIG. 8 is a plan view showing a partial cross section of a stator core and a tooth core of a motor, and FIG. 8 is a plan view showing a partial cross section after winding (four coils) of the stator core. 1 ... tooth core 2 ... rotor hole 3, 3 '... teeth 3a
… Bending portion, 7… Slot, 7A… Slot for A-phase winding, 7B… Slot for B-phase winding, 8… Opening, 9A… A-phase winding, 9B… B-phase winding, 10 ... Yoke core, O ... Center point

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02K 1/00-1/34 H02K 29/00 H02K 3/00-3/28

Claims (2)

(57) [Claims] A stator core having a slot number of 2 for each pole and phase, a tooth core having a plurality of teeth provided substantially radially on an outer periphery of a rotor hole and winding a winding; The yoke core is divided into a yoke core forming a path, and a part of the yoke core is fitted into the outer peripheral portion of the tooth core while partially fitting into the opening of the outer periphery of the slot of the tooth core. A short-winding A-phase winding is wound directly inside the slot of the tooth core, and a short-winding is wound outside the slot at a position separated by 90 degrees in electrical angle from the A-phase winding. In an adduction motor having a stator wound in a series winding, two teeth at both ends of an A-phase winding of each pole are provided in an S-shape or an inverted S-shape. The inverted or S-shaped tooth has a portion oriented substantially at right angles to the central tooth, and an extension of the orthogonally directed portion is a radial center point of the central tooth. Because it intersects with this central tooth on the inner side of the bridge, even if the winding is wound around the entire A-phase winding winding slot, only a small part of the B-phase winding winding slot is closed, and most of the winding space is used. Motor stator stator core set as can be left as. 2. A stator core having a number of slots of two for each pole and phase, a tooth core having a plurality of teeth provided substantially radially on the outer periphery of a rotor hole and winding a winding; The yoke core is divided into a yoke core forming a magnetic path, and a part of the yoke core is fitted into an outer peripheral portion of the tooth core while partially fitting into a slot opening of the tooth core. A short-phase winding A-phase winding is wound around the inside of the slot of the core core, and a short-phase winding B-phase winding is placed at an electrical angle of 90 degrees from the A-phase winding outside the slot. In the adduction type motor having the stator wound in series, the two teeth at both ends of the three teeth surrounded by the A-phase winding of each pole are provided in an S shape or an inverted S shape, This S
The S-shaped or inverted S-shaped tooth has a straight portion that intersects at an acute angle with respect to the extension of the center tooth in the inner circumferential direction, and the point where the extension of the center line intersects the straight portion. By inclining the rotor hole in a direction larger than the center of the circle and approaching the rotor hole, even if the winding is wound around the A-phase winding winding slot, only a part of the B-phase winding winding slot is closed. The stator core of the motor is configured to leave space for winding.