WO2002017462A1

WO2002017462A1 - Motor and rotor therefor

Info

Publication number: WO2002017462A1
Application number: PCT/JP2001/001824
Authority: WO
Inventors: Hideki Nakashima; Kousuke Haraga; Akinobu Mori; Takanori Komatsu
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2000-08-24
Filing date: 2001-03-08
Publication date: 2002-02-28
Also published as: CN1214506C; CN1394376A; TWI227587B; JP2002078257A

Abstract

A motor having a rotor comprising a plurality of poles with a clearance defined between adjacent permanent magnets of the poles. Thus, even if temperature changes occur owing to motor installation environments or to the starting frequency of the motor, thermal stress occurring in the bonded region between the rotor yoke and the permanent magnets is suppressed, thereby preventing the rotor yoke and the permanent magnets from separating from each other or the permanent magnets from cracking.

Description

Book Morning and its rotor

Technical field

TECHNICAL FIELD The present invention relates to a motor using a permanent magnet for a rotor,

Japanese Patent Application Laid-Open No. Hei 5-191938 discloses an example of a low-speed switch provided in a conventional mobile phone, which is shown in FIG. FIG. 15 is a configuration diagram showing a configuration of a mouth and a mouth of a conventional motor and a car.

In FIG. 15, 1 is a permanent magnet. Reference numeral 2 denotes a mouth-to-mouth yoke (15 denotes a thermosetting prepreg tape, and permanent magnets 1 are arranged on the thermosetting prepreg tape 15. On this thermosetting prepreg tape 15 The permanent magnets 1 arranged in a row are placed so that the permanent magnets 1 can be arranged without gaps around the outer periphery of the mouth yoke 2 when the mouth yoke 2 is wound with the heat-curable pre-prepared tape 15. Is placed.

In addition, another example of a low-speed power source provided by a conventional motor-power-source device will be described with reference to FIG. FIG. 16 is a perspective view of a rotor of a conventional motor.

The rotor-yoke 2 shown in FIG. 16 has a segmented neodymium sintered magnet (Nd-Fe-B) bonded in series with 10 pieces per pole. The diameter of the mouth yoke 2 is 200 to 500 mm, and the length is 200 to 50 O mm. The temperature of the bonded portion between the yoke 2 and the magnet changes from 140 ° C to + 100 ° C depending on the installation environment and the heat generated during operation. The different direction of the magnet is the direction perpendicular to the bonding surface, The direction perpendicular to the opposite direction (the direction along the bonding surface) has a negative coefficient of linear expansion <Such a large mouth-to-night-to-yoke 2 provided in the motor for the hoisting machine for the elevator. If there is no gap between the adjacent magnets, a large thermal stress is generated due to the temperature change due to the difference in the expansion coefficient of the yoke (steel), the magnet, and the adhesive. Peeling occurs with the magnet or the magnet breaks.

In FIG. 16, the same or corresponding parts as those in the conventional example shown in FIG. 15 are denoted by the same reference numerals, and the description thereof will be omitted, and the parts different from FIG. 15 will be described.

As described above, in the conventional mode, the permanent magnets 1 are arranged without gaps on the outer periphery of the yoke 2 and the temperature change due to the installation environment of the mode. The temperature change due to the frequency of startup of the magnet causes large thermal stress at the joint between the mouth and the permanent yoke and the permanent magnet, causing the permanent magnet to peel off the permanent magnet and breaking the permanent magnet There was a problem.

Disclosure of the invention

The present invention has been made in order to solve such a problem, and suppresses thermal stress generated between the mouth and the yoke and the permanent magnet, and separates the low and the yoke from the permanent magnet. The purpose of the present invention is to obtain a mouth and a mouth using the mouth and the mouth that can prevent the occurrence of cracks in the permanent magnet.

In order to achieve this object, a motor according to the present invention includes a mouth having a plurality of poles and a gap provided between permanent magnets adjacent to the poles.

According to another aspect of the present invention, there is provided a motor having a plurality of poles and a gap provided for a predetermined number of permanent magnets. Further, in the motor according to the present invention, a gap between adjacent permanent magnets is filled with an adhesive containing beads.

Further, according to the present invention, the space between adjacent poles is filled with an adhesive containing beads.

Further, according to the present invention, the adhesive is a nitrile rubber-modified acryl-based or epoxy-based two-part room-temperature-curable adhesive. The beads have a diameter of 0.1 to 0.3 mm.

Further, according to the present invention, the beads are made of polyethylene or silicone rubber.

In addition, according to the present invention, the amount of beads added is 1 to 10%.

Furthermore, the present invention relates to a silicon steel plate having laminated ceramics, and a permanent magnet bonded with a nitrile rubber modified acryl-based adhesive.

Further, according to the present invention, the low-performance resin is made of iron, and the permanent magnet is bonded with a nitrile rubber-modified acryl-based adhesive. Attachment of permanent magnets to the row is performed by a jig that can simultaneously attach multiple permanent magnets.

Further, according to the present invention, a prepreg tape obtained by impregnating a glass fiber with an ultraviolet curable resin is wound around an outer periphery of a mouth to which a permanent magnet is attached.

In a motor according to the present invention, in a motor having a plurality of poles, a gap is provided between permanent magnets adjacent to the poles. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view of a rotor included in a motor according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the row and column of the module of Embodiment 1 of the present invention.

FIG. 3 is a cross-sectional view of the mouth of the module of Example 2 of the present invention.

FIG. 4 is a cross-sectional view of the mouth of the motor according to the third embodiment of the present invention.

FIG. 5 is a sectional view of the motor of Embodiment 4 of the present invention, taken through the mouth.

FIG. 6 is a sectional view of a rotor included in a motor of Embodiment 5 of the present invention.

FIG. 7 is a cross-sectional view of the mouth of the module of Embodiment 6 of the present invention.

FIG. 8 is a sectional view of a rotor included in a motor of Embodiment 7 of the present invention.

FIG. 9 is a first conceptual diagram illustrating a method of manufacturing a rotor included in a motor according to a seventh embodiment of the present invention.

FIG. 10 is a second conceptual diagram illustrating a method for manufacturing a motor according to Example 7 of the present invention.

FIG. 11 is a third conceptual diagram for explaining the manufacturing method of the present invention according to Embodiment 7 of the present invention.

FIG. 12 is a cross-sectional view of the motor of Embodiment 8 of the present invention, taken through the mouth.

FIG. 13 is a cross-sectional view of a row and column of a motor and a column of a ninth embodiment of the present invention. It is.

FIG. 14 is a cross-sectional view of the row and column of the module of Embodiment 10 of the present invention.

FIG. 15 is a configuration diagram showing a configuration of a mouth and a mouth provided in a conventional motor and a car.

FIG. 16 is a perspective view of the mouth of a conventional motor. BEST MODE FOR CARRYING OUT THE INVENTION

Next, examples of the present invention will be described as follows.

Example 1

One embodiment of the mouth and mouth of the motor according to the present invention will be described with reference to FIG. FIG. 1 is a perspective view of the mouth of the module of Embodiment 1 of the present invention.

In FIG. 1, 1 is a permanent magnet. Numeral 2 is a rotor-to-mouth yoke. The permanent magnet 1 is provided on the outer peripheral surface of the raw yoke 2. The permanent magnet 1 is bonded to the raw yoke 2 using, for example, an adhesive.

3 is a gap between adjacent permanent magnets 1. In the first embodiment, for example, the gap 3 is provided between the permanent magnets 1 adjacent to each other in the axial direction of the rotation shaft of the low yoke 2.

The width of the gap 3 is, for example, 140 from the curing temperature of the adhesive. It is larger than the dimensional difference between the heat shrinkage of the steel yoke 2 and the permanent magnet 1 when it goes down to C. The thermal expansion coefficient of the permanent magnet 1 is smaller than the thermal expansion coefficient of the rotor yoke 2, and the heat shrinkage of the permanent magnet 1 is smaller than the heat shrinkage of the rotor yoke 2. Thus, by providing a gap between the adjacent permanent magnets 1, the temperature can be reduced. , The compressive force acting on the permanent magnet 1 can be suppressed. If the permanent magnet 1 is provided without a gap, a large compressive force acts on the permanent magnet 1 due to a decrease in temperature.

Next, a cross section of the rotor included in the motor shown in FIG. 1 will be described with reference to FIG. FIG. 2 is a cross-sectional view of the motor of the present embodiment taken along a row.

In FIG. 2, reference numeral 4 denotes a one-component heat-curable adhesive.

In FIG. 2, the same or corresponding parts as in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted, and the parts different from FIG. 1 are described. For example, using a one-component heat-curing adhesive 4 as the adhesive for bonding the permanent magnet 1 and the raw yoke 2, the permanent magnets 1 are arranged side by side with the opening yoke 2 without any gap, and are obtained. In a heat cycle test at 140 ° C. to + 100 ° C., a thermal stress was generated between the permanent magnet 1 and the mouth yoke 2 and the peeling occurred.

However, if a gap 3 of 0.1 mm is provided between the adjacent permanent magnets 1 and the permanent magnets 1 are arranged side by side on the yoke 2 and bonded together, the obtained magnets are tested by the heat cycle test described above. However, the thermal stress between the permanent magnet 1 and the rotor 2 was reduced, and no delamination occurred.

It is assumed that the bonding between the permanent magnet 1 and the opening yoke 2 using the one-component heat-curable adhesive 4 was performed at 120 ° C., which is the curing temperature of the adhesive. In this way, by providing a gap 3 of 0.1 mm between the adjacent permanent magnets 1 and bonding the permanent magnets 1 and the mouth yoke 2 to each other, the temperature is reduced from 140 ° C to + 100 ° C. Even if a temperature change of ° C occurs, thermal stress is reduced, and a highly reliable mouth without peeling or cracking can be obtained.

The bonding with the one-component heat-curable adhesive 4 ′ is performed at 120 ° C., which is the curing temperature of the adhesive. At that time, a compression force acts on the permanent magnet 1 already.

The motor of this embodiment is used, for example, for a hoisting machine for an elevator.

Example 2.

Another embodiment of the present invention will be described with reference to FIG. FIG. 3 is a sectional view of a rotor included in the motor of the present embodiment.

In FIG. 3, reference numeral 5 denotes a two-liquid room temperature-curable adhesive. The two-liquid room temperature curing adhesive 5 includes an acryl-based or epoxy-based adhesive.

When the permanent magnet 1 and the rotor yoke 2 are adhered to each other using the two-part room temperature curing adhesive 5, if the permanent magnet 1 is arranged side by side with the mouth yoke 2 without any gap, — 40 ° C From the heat cycle test at +100 ° C, thermal stress was generated between the permanent magnet 1 and the yoke 2, and peeling occurred. However, by providing a gap 3 of 0.05 mm between adjacent permanent magnets 1 and arranging the permanent magnets 1 in the mouth yoke 2 one by one, the heat cycle test described above Even so, the thermal stress between the permanent magnet 1 and the opening-and-closing yoke 2 was reduced, and no peeling occurred. Here, it is assumed that the bonding between the permanent magnet 1 and the opening yoke 2 using the two-liquid room temperature curing adhesive 5 was performed at room temperature. In this way, by providing a gap 3 of 0.05 mm between the adjacent permanent magnets 1 and bonding the permanent magnet 1 and the yoke 2 with the mouth, the temperature is reduced from 140 ° C to + 10 ° C. Even if a temperature change of 0 ° C occurs, the thermal stress is reduced, and a highly reliable mouth without peeling or cracking can be obtained.

In addition, the use of the two-component room-temperature-curable adhesive 5 can reduce the gap 3 between the permanent magnets 4 as compared with the case where the one-component heat-curable adhesive 4 is used.

Furthermore, the use of the two-part room temperature curing adhesive 5 makes the heating process In other words, energy can be saved during manufacturing, the manufacturing process can be streamlined and simplified, and costs can be reduced.

In FIG. 3, the same or corresponding parts as those in the first embodiment shown in FIG. 2 are denoted by the same reference numerals, and the description thereof will be omitted, and the parts different from FIG. 2 will be described.

Example 3.

Another embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view of the rotor of the motor of this embodiment.

In the motor shown in FIG. 4, a predetermined number of permanent magnets 1 are brought into close contact with each other, and the closely spaced predetermined number of permanent magnets 1 are used as one block to provide a gap 3 between adjacent blocks. As a block in which the plurality of permanent magnets 1 are closely contacted, a block in which a plurality of permanent magnets 1 adjacent in the serial direction, that is, in the axial direction of the rotation axis of the yoke 2 is considered. As described above, since the plurality of permanent magnets 1 are closely contacted to form a block, a plurality of permanent magnets 1 can be simultaneously attached to the row and yoke 2 for each block, thereby simplifying the manufacturing process of the motor. The manufacturing time of the motor can be shortened, and the cost can be reduced. In FIG. 4, the same or corresponding parts as those in the first embodiment shown in FIG. The description is omitted by attaching, and portions different from FIG. 2 are described.

Example 4.

Another embodiment of the motor according to the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view of the mouth of the module of the present embodiment.

In FIG. 5, reference numeral 6 denotes a bead having a predetermined size. It is made of resin or rubber.

By bonding the permanent magnet 1 and the opening and closing yoke 2 using an adhesive in which beads 6 of a predetermined size are mixed in advance, the thickness of the bonding layer between the permanent magnet 1 and the rotor yoke 2 Can be kept constant, and dimension management becomes easy.

In FIG. 5, parts that are the same as or correspond to those in Example 1 shown in FIG. 2 are denoted by the same reference numerals, description thereof is omitted, and parts different from FIG. 2 are described.

Embodiment 5.

Another embodiment of the present invention will be described with reference to FIG. FIG. 6 is a cross-sectional view of the mouth of the module of the present embodiment.

In the motor shown in FIG. 6, the permanent magnet 1 and the raw material yoke 2 are bonded together with the adhesive to which beads 6 of a predetermined size are added, and the adjacent permanent magnets 1 are also bonded. .

In FIG. 6, parts that are the same as or correspond to those in Example 4 shown in FIG. 5 are given the same reference numerals, and description thereof is omitted. Parts that are different from FIG. 5 are described.

As described above, the permanent magnet 1 and the mouth-and-one-yoke 2 are bonded to each other by the adhesive to which the beads 6 of a predetermined size are added, so that the adhesive layer between the permanent magnet 1 and the mouth-and-one-yoke 2 is formed. The thickness can be kept constant, and dimensional control becomes easy.

Further, since the permanent magnets 1 adjacent to each other are adhered to each other by the adhesive to which the beads 6 of a predetermined size are added, the thickness of the adhesive layer between the permanent magnets 1 adjacent to each other is fixed to the diameter of the beads 6. Can be a value. In addition, the permanent magnets 1 adjacent to each other are bonded with an adhesive to which beads 6 having predetermined dimensions are added. This eliminates the need to intentionally provide the gap 3 between the permanent magnets 1, and facilitates the mounting and dimensional control of the permanent magnets 1.

The size of the beads 6 added to the adhesive is such that the bonding strength between the opening and closing yoke 2 and the permanent magnet 1 is maximized, and the gap 3 between the permanent magnets 1 as described in the first embodiment is provided. 0 enough to secure. 1 to 0. 3 mm are suitable _c of the bead 6 diameter is 0 if. less than 1 mm, peel strength and impact bonding strength decreases. If the diameter of the beads 6 is larger than 0.3 mm, problems such as a decrease in the shear adhesive strength, a decrease in the magnetic properties, and an inability to secure a clearance with the stay are caused.

The material of the beads 6 is suitably soft, and polyethylene beads and silicone rubber beads are suitable. On the other hand, if a hard material such as ceramic, glass, or metal is used as the material of the beads 6, the difference in the amount of shrinkage between the mouth 2 and the permanent magnet 1 when the temperature drops is reduced. The adhesive cannot be absorbed by the adhesive layer between the permanent magnets 1, and the heat cycle test causes the yoke 2 and the permanent magnet 1 to be peeled off or the permanent magnet 1 to be broken. In other words, by making the material of the beads 6 softer, the difference in the amount of shrinkage between the yoke 2 and the permanent magnet 1 can be absorbed by the adhesive layer between the permanent magnets 1 when the temperature drops. It is possible to prevent the mouthpiece 2 from being separated from the permanent magnet 1 and to prevent the permanent magnet 1 from cracking.

Further, when the adhesive is a room temperature-curable adhesive, any one of polyethylene beads and silicone rubber beads may be used. However, when the adhesive is a heat-curable adhesive, it is better to use silicone rubber beads. This is because when polyethylene beads are used, the beads 6 are melted by heat generated during heating.

The amount of beads 6 to be added is between permanent magnet 1 and low It is necessary to use an amount such that the thickness of the adhesive layer between the magnet 1 and the magnet 1 is stable. If the bead 6 is excessively added to the adhesive, there is a problem that the adhesive strength is reduced. For example, if a certain adhesive is used to bond between the adjacent permanent magnets 1 and between the permanent magnets 1 and the mouth yoke 2, the mouth yoke 2 to which the permanent magnets 1 are bonded becomes Even in the cycle test, there is no peeling between the adjacent permanent magnets 1 and between the permanent magnet 1 and the opening and closing yoke 2, and no cracking occurs in the permanent magnets 1. I was able to get a high mouth-to-mouth ratio. The adhesive at this time was a nitrile rubber-modified acryl-based adhesive that was a two-liquid, room-temperature, short-curing adhesive containing 5% of polyethylene beads with an average particle diameter of 0.1 mm. Adhesion between the adjacent permanent magnets 1 and between the permanent magnets 1 and the opening and closing yoke 2 could be performed without any particular consciousness without providing the gap 3. In this test, ten permanent magnets 1 were bonded in series to one pole in the axial direction of the rotating shaft of the yoke 2 over the mouth.

Embodiment 6.

Another embodiment of the present invention will be described with reference to FIG. FIG. 7 is a cross-sectional view of the motor of the present embodiment taken along a row.

The motor shown in FIG. 7 is an adhesive to which beads 6 having a predetermined size are added, and is bonded between adjacent permanent magnets 1 and between the permanent magnets 1 and the rotor yoke 2.

In addition, in the model shown in FIG. 7, using the same adhesive,

—The gap 3 between the poles adjacent in the radial direction perpendicular to the axial direction of the rotation axis of the yoke 2 and the outer periphery of the yoke 2 is filled. Filling the gap 3 between adjacent poles in the radial direction is called so-called gap filling. In FIG. 7, parts that are the same as or correspond to those in Example 5 shown in FIG. 6 are denoted by the same reference numerals, description thereof is omitted, and parts different from FIG. 6 are described.

In this way, the permanent magnet 1 can be more firmly fixed to the mouth yoke 2 by bonding between the adjacent poles in the radial direction with an adhesive to which beads 6 of a predetermined size are added. it can.

Embodiment 7.

Another embodiment of the present invention will be described with reference to FIG. FIG. 8 is a cross-sectional view of the mouth of the motor of the present embodiment.

In FIG. 8, reference numeral 7 denotes a pre-preda tape, which is made by impregnating glass fiber with an ultraviolet-curable resin, semi-cured to have an adhesive property, and cured when irradiated with ultraviolet light. is there.

Such a prepreg tape 7 is bonded to the permanent magnets 1 adjacent to each other and the permanent magnets 1 and the yoke 2 and then wrapped around the outer periphery of the permanent magnets 1 and cured by irradiating ultraviolet rays. It is to let.

As described above, the use of the UV-curable prepreg tape eliminates the need for a conventional heat-curable prepreg tape, eliminates the need for a heating step for curing, simplifies the process, and reduces costs. Down is possible.

In addition, a two-liquid room-temperature-curable nitrile rubber-modified acryl-based adhesive and an ultraviolet-curable prepreg tape are used to fix the permanent magnets 1 adjacent to each other and to fix the permanent magnets 1 to the rotor yoke 2. This eliminates the need for conventional heat-curable adhesives, heat-curable inter-filling resin, and heat-curable prepreg tape, and eliminates the need for heating for fixing, thereby reducing energy consumption. . Also need to heat The work time can be reduced by several hours.

Further, in order to fix the permanent magnets 1 adjacent to each other and to fix the permanent magnets 1 to the mouth yoke 2, a two-liquid room temperature-curable nitrile rubber-modified acryl-based adhesive, and an ultraviolet-curable prepreg tape are used. The use of heat-curable adhesive, heat-curable inter-filling resin, and heat-curable prepreg tape eliminates the need for heat-curing. The problem that thermal stress is generated in the cooling process before returning can be solved.

In FIG. 8, the same or corresponding parts as those in Example 6 shown in FIG. 7 are denoted by the same reference numerals, and the description thereof will be omitted, and the parts different from FIG. 7 will be described.

Next, a method of manufacturing the rotor included in the motor shown in FIG. 8 will be described with reference to FIGS. FIG. 9 is a first conceptual diagram for explaining a method of manufacturing the mouth and mouth of the motor of the present embodiment.

In FIG. 9, reference numeral 8 denotes a nozzle A. 9 is nozzle B. Reference numeral 10 denotes an adhesive A, which is emitted from the nozzle A 8. 11 is an adhesive B agent, which is emitted from the nozzle B 9.

In FIG. 9, the same or corresponding parts as those in FIG. 8 are denoted by the same reference numerals, and the description thereof will be omitted. The parts different from FIG. 8 will be described. FIG. 10 is a second conceptual diagram illustrating the method of manufacturing a motor according to the present embodiment. In FIG. 10, the same or corresponding parts as those in FIG. S are denoted by the same reference numerals and description thereof is omitted.

Further, FIG. 11 is a third conceptual diagram for explaining the method of manufacturing a motor according to the present embodiment. In FIG. 11, the same or corresponding parts as in FIG. 8 are denoted by the same reference numerals, and the description thereof is omitted.

Next, a method of manufacturing the motor shown in FIGS. 9 to 11 will be described. First, set the rower yoke 2 horizontally and attach it to the turntable.

Then, the adhesive A agent 10 and the adhesive B agent 11 are mixed and applied to the bonding portion of the permanent magnet 1 on the yoke 2. The two-liquid, room-temperature, short-time curing type nitrile rubber-modified acryl-based adhesive has excellent oil-surface adhesiveness, and does not require any special treatment of the adhesive surface of the ROYU Yoke 2. As a method of the mixed coating, there is a spray coating method, and these nozzles A 8 and A 9 are used by using a nozzle A 8 for the adhesive A agent 10 and a nozzle B 9 for the adhesive B agent 11. Adhesive A 10 and Spray B 1 11 sprayed from nozzle B 9 are mixed in a mist, and the resulting adhesive is applied to the bonded part on low pressure 2 Things.

Next, the permanent magnets 1 are adhered to the yoke 2 one by one from the end one by one. At this time, the next permanent magnet 1 is first placed at a position slightly away from the permanent magnet 1 already stuck on the mouth 2. Then, while being pressed lightly, the adhesive is moved so as to press against the already attached permanent magnet 1, and the adhesive enters between the permanent magnets 1 and the beads 6 mixed in the adhesive cause The gap 3 corresponding to the diameter of the bead 6 is naturally formed.

This process is repeated, and after pasting the permanent magnet 1 for one pole connected in the axial direction of the rotation axis of the mouth 2, the rotor 1 is rotated, and the same procedure is performed for the next pole. Repeating the above process, the permanent magnet 1 is bonded to the mouth 2.

After the permanent magnet 1 has been bonded to this pole, the same adhesive as described above is spray applied between the immediately preceding pole and the current pole to fill the gap.

Then, attach the permanent magnet 1 to all the poles and the entire circumference of the rotor yoke 2 and fill all the gaps with the adhesive. Wrap multiple layers of prepred tape 7 from above.

Finally, the pre-taper tape 7 is cured by irradiating ultraviolet rays while rotating the mouth yoke 2 wound by the pre-preparation tape 7.

Example 8

Another embodiment of the present invention will be described with reference to FIG. 12. FIG. 12 is a sectional view of the mouth and mouth of the motor of this embodiment.

In FIG. 12, reference numeral 12 denotes a jig. This jig 12 attaches to the jig 1 2 by suction, electromagnet, magnet tool, etc., the permanent magnet 1 placed beforehand, and glues the permanent magnet 1 on the yoke 2 Then, the jig 1 2 is removed from the permanent magnet 1. A plurality of permanent magnets 1 attached to the jig 12 may be arranged in advance in the axial direction (series) of the rotating shaft of the mouth 2 in advance.

In FIG. 12, the same or corresponding parts as those of the third embodiment shown in FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted, and the parts different from FIG. 4 will be described.

If the surface of the jig 12 is covered with a non-adhesive material such as Teflon, polyethylene, or polypropylene, it is easy to clean when the adhesive is attached.

Embodiment 9.

Another embodiment of the motor according to the present invention will be described with reference to FIG. FIG. 13 is a cross-sectional view of the mouth of the module of the present embodiment.

In Fig. 13, 13 is a low yoke made of a laminated product of silicon steel sheets.c In Fig. 13, the same or corresponding parts as those in Example 7 shown in Fig. 8 are denoted by the same reference numerals. The description is omitted and the parts different from FIG. I explained it.

In addition, when a laminated product of silicon steel sheets is used for the rotor yoke, when a chemical solution is used in degreasing before bonding, the chemical solution penetrates between the laminated silicon steel sheets, and the soaked chemical solution can be completely removed. It will be difficult. However, the use of a two-liquid, room-temperature, short-curing nitrile rubber-modified acrylic adhesive with excellent oil-surface adhesion eliminates the need for pre-adhesion treatment of the yoke and the degreasing work. The process can be streamlined, solvent removal can be achieved, and bonding reliability is improved.

Such a mouth-to-mouth is used when a similar laminate of silicon steel sheets is used in the stay. The use of the same laminated product of silicon steel sheets in these days and days can reduce material costs. Example 10

Another embodiment of the motor of the present invention will be described with reference to FIG. FIG. 14 is a sectional view of the mouth and mouth of the motor of this embodiment.

In the first 4 diagrams, 1 4 _c still a鎵鉄made mouth Isseki one yoke is錶物, in the first FIG. 4, the same or corresponding parts as in Example 9 shown in the first FIG. 3, The same reference numerals are given and the description is omitted, and the parts different from FIG. 13 are described.

Also, if iron is used for the yoke, the red mackerel will be generated immediately when the permanent magnet 1 is degreased before bonding, thereby impairing the adhesiveness. However, the use of a two-liquid, room-temperature, short-curing nitrile rubber-modified acryl-based adhesive with excellent oil-surface adhesion eliminates the need for pre-adhesion treatment of the rotor yoke, making it possible to eliminate the need for degreasing. The rationalization can be achieved, the solvent can be eliminated, and the reliability of bonding can be improved. By using such iron for low-grade steel, etc., other materials In some cases, processing is possible even when the structure is complicated and processing is not possible. As described above, the motor according to the present invention has a plurality of poles, and has a low gap in which a gap is provided between the permanent magnets adjacent to the poles. However, thermal stress between the permanent magnet and the mouth is reduced, and the occurrence of peeling can be suppressed.

Further, the motor according to the present invention includes a plurality of poles, and a row of magnets provided with a gap for each of a predetermined number of permanent magnets of the poles. However, thermal stress between the permanent magnet and the mouth is reduced, and the occurrence of peeling can be suppressed.

Further, in the motor according to the present invention, the gap between the adjacent permanent magnets is filled with an adhesive containing beads, and the gap between the adjacent permanent magnets is filled with an adhesive containing beads of a predetermined size. As a result, the thickness of the adhesive layer between the adjacent permanent magnets can be made constant, and dimensional control becomes easy. Further, in the motor according to the present invention, the gap between adjacent poles is filled with an adhesive containing beads, so that the permanent magnet can be more firmly fixed to the rotor.

Further, according to the present invention, the adhesive is a nitrile rubber-modified acryl-based or epoxy-based two-part room temperature-curable adhesive, which is more effective than the one-part heat-curable adhesive. Also, the gap between the permanent magnets can be reduced.

Further, according to the present invention, the diameter of the beads is 0.1 to 0.3 mm, and the gap between the adjacent permanent magnets is filled by the adhesive containing the beads to form the adjacent permanent magnets. The thickness of the adhesive layer between the magnets can be made constant, and dimensional control becomes easy.

In the motor according to the present invention, the beads are made of polyethylene or silicon rubber. The difference in the amount of shrinkage of the permanent magnet can be absorbed by the adhesive layer between the permanent magnets, preventing peeling of the permanent magnet and the permanent magnet, and preventing cracking of the permanent magnet.

Furthermore, the molybdenum according to the present invention has an addition amount of beads of 1 to 10%, and stabilizes the thickness of the adhesive layer between the permanent magnets or between the mouth and the permanent magnet. Thus, the thickness of the adhesive layer can be made constant while maintaining the adhesive strength.

Further, according to the present invention, a prepreg tape obtained by impregnating a glass fiber with an ultraviolet curable resin is wound around an outer periphery of the mouth where a permanent magnet is attached, There is no need to provide a heating step for hardening the tape, which simplifies the process and reduces costs.

According to the present invention, there is provided a mouth-to-mouth arrangement in which a gap is provided between the adjacent permanent magnets of the poles in the mouth having a plurality of poles. The thermal stress between the first and the second is reduced, and the occurrence of peeling can be suppressed. Industrial applicability

As described above, the motor according to the present invention has a plurality of poles, and has a low gap in which a gap is provided between the permanent magnets adjacent to the poles. However, the thermal stress between the permanent magnet and the low magnet is reduced, and the occurrence of peeling can be suppressed.

Claims

The scope of the claims

1. A motor, comprising: a plurality of poles, a rotor having a gap between permanent magnets adjacent to the poles.

2. A motor having a plurality of poles and a mouth provided with a gap for each of a predetermined number of permanent magnets of the poles.

3. The module according to claim 1, wherein a gap between adjacent permanent magnets is filled with an adhesive containing beads.

4. The module according to claim 3, wherein a space between adjacent poles is filled with an adhesive containing beads.

5. The motor according to claim 3, wherein the adhesive is a nitrile rubber-modified acrylic or epoxy two-part, room temperature curing adhesive.

6. The beads according to claim 3, wherein the beads have a diameter of 0.1 to 0.3 mm.

7. The module according to claim 3, wherein the beads are made of polyethylene or silicone rubber.

8. The motor according to claim 3, wherein the addition amount of the beads is 1 to 10%.

9. The module according to claim 1, wherein the mouth is a laminated silicon steel sheet, and the permanent magnet is bonded with a nitrile rubber-modified acryl-based adhesive.

10. The motor according to claim 1, wherein the mouth is made of iron and the permanent magnet is bonded with nitrile rubber-modified acrylic adhesive.

1 1. Attach permanent magnets to the low permanent magnet. The method is performed by a jig that can be attached.

The model described in 1.

12. A prepreg tape obtained by impregnating glass fiber with an ultraviolet curable resin is wound around the outer periphery of the mouth to which the permanent magnet is attached, according to claim 1. Mo Yuichi.

13. A mouth and mouth of a motor, wherein a gap is provided between permanent magnets adjacent to the poles in a row having a plurality of poles.