JPH02299448A - Induction motor equipped with a plurality of stators - Google Patents

Abstract

PURPOSE:To obtain large heat dissipating effect by a method wherein resistance materials, connecting and short-circuiting rotor conductors, are arranged in zigzag and the cross-sectional area of the same is formed so as to be reduced sequentially as a distance from the center of the resistant material is increased. CONSTITUTION:A rotor 8 is formed of rotor parts 2, 3, a conductor 55 and resistance materials (r). The resistance materials (r) are arranged in zigzag along the rotor conductor 5 and the inside of the same are secured to the conductor 55 while the other side is projected outwardly from the rotor conductor 5. The cross-sectional area of the resistance material (r) at a part 80 secured to the conductor 55 and the vicinity of the same part is formed larger than the part 81 projected outwardly from the rotor conductor 5. In this case, the zigzag configuration of the resistance materials (r) promotes the stirring of atmosphere by the rotation of a rotor 8 and effects as the effecting body 13 of cooling. The electroconductive passage of the resistance material (r) is provided with a higher resistance as a distance from the center of the resistance material (r) is increased and, therefore, the heat generation of the resistance material is concentrated to the outer parts 81 of the same. A large heat dissipating effect may be generated by synergistic effect in such a manner.

Description

[Detailed Description of the Invention] [Prior Art] Conventionally, when starting a squirrel cage induction motor that is commonly used, star-delta starting, reactor starting, starting compensator starting, etc. are used as means to control the starting current. However, although these methods can control the starting current, they cannot improve the starting torque.

Furthermore, in wire-wound electric motors, although it is possible to improve the starting torque by changing the resistance value of the secondary resistor, it is necessary to use brushes and stop rings, making maintainability difficult.

To address the above problems, for example,
There is a technique disclosed in Japanese Patent No.-29005. This device consists of two sets of rotor cores installed coaxially, two sets of stators each having independent stator windings facing the rotor cores, and two sets of stators that straddle each of the rotor cores. A squirrel cage conductor that is installed in common and short-circuited at both ends via short-circuit rings, and a high-wire cage conductor that is short-circuited between the squirrel-cage conductors at the center of the squirrel-cage conductors between two sets of rotor cores. This is a twin core squirrel-cage type motor, which is equipped with a resistor, shifts the phase of each set of stator windings by 180 degrees during startup, and supplies power while matching the phases during operation after startup. By shifting the phase of the stator windings by 180 degrees during startup, the starting torque is increased and the starting characteristics are improved. During operation, the phases of the stator windings are matched, allowing operation with normal torque characteristics. It is characterized by points. Therefore, although the effect of improving startability is recognized, it is necessary to ensure sufficient torque and automatically change the phase difference with less shock when increasing or decreasing the rotational speed under load. The purpose was only to reduce the starting current and increase the starting torque. Also,
The phase difference could only be set and maintained at 180° and 0°, and it did not have a wide range of compatibility with loads. Therefore, the starting torque is limited to a torque characteristic with a phase difference of 180°, and it is not possible to respond to a wide range of changes in load.

Here, the applicant disclosed in Japanese Patent Application Laid-open No. 62-260590 that the speed control range is wide and the speed control is stepless so that it can be set to any desired speed and can be started with any torque. It also discloses an induction motor with a multi-stator configuration that has excellent torque characteristics and efficiency over the entire speed range from the starting point to the maximum rotational speed (2).

Furthermore, regarding the resistive material short-circuited to the rotor conductor between the rotor cores of the present invention, the present applicant has disclosed the prior application in Japanese Patent Application Laid-Open No. 62-2967.
No. 91 discloses that each of the plurality of conductors is short-circuited via a connecting member in the space between the plurality of rotor cores or in the non-magnetic core portion, and the windings wound around the stator are short-circuited. A configuration in which the connecting member protrudes outward is disclosed.

[Problem to be solved by the invention]

As is clear from the publication, the above-mentioned operation and effect of the multi-stator induction motor of the present applicant can be achieved by using arbitrary means 2) to cause a phase shift in the magnetic flux of the rotating magnetic field generated between the respective stators. The voltage induced in the rotor conductor changes according to the phase shift of the magnetic flux, and the rotational speed of the rotor can be arbitrarily changed by increasing or decreasing the voltage induced in the rotor conductor.

Also, if a voltage phase difference occurs between multiple stators,
The currents induced by multiple stators and flowing individually to the rotor conductors are short-circuited between the multiple conductors and a combined current flows, resulting in a large torque in each speed range that changes according to the phase shift. efficiency can be improved at the same time.

By the way, in a low-speed rotation region where the voltage phase shift is large, the ventilation cooling effect is attenuated due to the decrease in the rotation speed of the impeller, and the current flowing between the plurality of conductors via the resistive material becomes large2). This is a phenomenon in which the heat generation of the resistive material becomes extremely high.

This prevents heat propagation to other parts due to heat generated by the resistor material.
It is necessary to improve the cooling effect of the resistance material itself. However, when trying to improve the heat dissipation effect, it is good to increase the surface area of the resistor material, but if the surface area is increased unnecessarily, the resistance value cannot be secured, and the range of heat generation is also from the entire resistor material, so the range of heat propagation is also becomes larger.

For this reason, it is necessary to have as large a surface area as possible, to ensure an arbitrary resistance value, and to generate heat in a place that does not affect other components.

Furthermore, the resistive material that serves as the conductive path can cause dust and moisture to stick around the resistive material due to heat generation, and when used for a long time, the resistance value changes due to short circuits in the resistive material, which can affect the characteristics of the motor. 2) It is necessary to maintain a stable resistance value over a long period of time.

2) A resistor for short-circuiting the rotor conductor between the rotor cores, and the cross-sectional area of the conductive path decreases as it goes away from the rotor conductor to the outside of the rotor. The material is formed into a plate-shaped resistance material, and in order to secure an arbitrary resistance value between adjacent rotor conductors, the plate-shaped resistance material is provided with a radial gap and a gap branching from the radial gap, or by a partner. a radial gap and the radial gap so that the cross-sectional area of the conductive path formed by the gap in the plate-shaped resistive material becomes smaller as it moves outward from the center of the plate-shaped resistive material; 2), and the resistance material for short-circuiting the rotor conductor between the rotor cores is formed in a disc-shaped resistance material, and the disc-shaped resistance material is The plate-shaped resistance material is formed so that its thickness gradually decreases as it moves outward from the center, and furthermore, in order to secure a desired resistance value between adjacent rotor conductors, the plate-shaped resistance material is formed with a radial gap and a radial gap. A multi-stator induction motor with excellent performance is achieved by improving heat dissipation and cooling of the resistor material, preventing heat propagation to other parts due to heat generated by the resistor material, and stabilizing the resistance value through gaps branching from the gap. The technical challenge is to provide the following.

[Means to solve the problem]

A plurality of rotating conductors are installed in a continuous manner on a plurality of rotor cores that are mounted on the same rotating shaft at regular intervals, and the rotor conductors have resistance between the plurality of rotor cores. an integral rotor short-circuited by a material;
A plurality of stators are formed coaxially with the rotor and have stator cores facing each rotor core, and one of the stators is attached to at least one of the plurality of stators. In a multi-stator induction motor, the rotor is The resistance material that short-circuits the conductors between the rotor cores forms a conductive path from the rotor conductor to one or the other of the rotors2), and further connects the rotor conductor between the rotor cores. The resistance material to be short-circuited and connected is formed into a plate-shaped resistance material whose thickness gradually decreases as it goes away from the center. A conductive path formed by one or the other of a radial gap and a gap branching from the radial gap is formed in the resistive material, and the cross-sectional area of the conductive path formed by the gap in the plate-shaped resistive material is The above-mentioned problem is solved by providing one or the other of the radial gap and the gap branching from the radial gap so that the gap becomes smaller as it goes outward from the center of the disc-shaped resistance material.

Further, according to the present invention, a protrusion having a heat dissipation and stirring action is provided on the plate surface or the circumference of the plate-shaped resistance material 2)
, the resistance material or the plate-like resistance material is made of aluminum or an aluminum alloy made of aluminum2), and the resistance material or the plate-like resistance material is entirely made of aluminum, except for the remaining area of the resistance material or the plate-like resistance material. 2) was taken as a means to solve the above problem.

[For production]

According to the present invention, the resistance material that short-circuits and connects adjacent rotor conductors between the rotor cores is formed of a plate-shaped resistance material, and is composed of one or both of a radial gap and a gap branching from the radial gap. This results in a short-circuit connection due to the conductive path.

At this time, the cross-sectional area of the conductive path of the resistance material that short-circuits the rotor conductors between the rotor cores gradually becomes smaller as it moves outward from the rotor or from the center of the plate-shaped resistance material. The resistance value of the resistive material increases as it goes outward2).
The heat generated by the resistive material also increases as it goes outward.

Aluminum can be used for the plate-shaped resistance material to enhance the heat dissipation effect, and the plate surface or circumference of the plate-shaped resistance material,
Providing a protrusion, such as a blade-shaped one with a stirring effect or a fin-shaped one for a heat sink, will increase the heat dissipation effect due to the good thermal conductivity of aluminum and the increased surface area.

In addition, insulation is applied to the gap provided in the resistor material or the surface of the plate-shaped resistor material to prevent short circuits between conductive paths of the resistor material during long-term use.

Furthermore, by making the resistance material into a plate shape, it is possible to improve the heat dissipation effect, and by providing multiple plate-shaped resistance materials, it is possible to further improve the heat dissipation effect and the strength between the rotor cores. .

Note that the multiple stator induction motor of the present invention is a single-phase or three-phase induction motor.
It can be formed in any phase, and the rotor can be formed in any of the following shapes: normal cage shape, double cage shape, deep groove cage shape, special cage shape, wound shape, etc. 2) The conductor used in the description of the present invention is a general term for the conductor installed in the squirrel cage rotor core and the winding wire wound around the wound rotor core.

〔Example〕

The configuration of the variable speed induction motor according to the present invention will be explained below with reference to FIGS. 1 to 4.

Rotor parts 2 and 3 made of iron cores are mounted on a rotor shaft 4 with arbitrary spacing, and the rotor part is formed by stacking steel plates with a plurality of conductor holes to form a rotor core. Applying an insulating material to the rotor core and casting aluminum to form a plurality of conductors 5 in the conductor holes, short circuit rings 6 and 7 at one end thereof, and an end portion 51 for the plurality of conductors at the other side. did.

Furthermore, between the rotor portions 2.3, a conductor 55 is connected in a continuous manner to integrally form the rotor portions 2.3. Rotor part 2
, 3, the conductor 55 connected in a continuous manner between the resistive material r...
・For example, short-circuit connections are made through aluminum, copper-nickel alloy, nickel-chromium alloy, iron-chromium alloy, stainless steel, etc. A conductor 55 between the rotor parts 2 and 3
The space formed by the resistive material and its surroundings may be left as is or may be formed from a non-magnetic material.

Moreover, the resistance material r can be formed in the cooling effecting body 13 as a cooling agitator having an arbitrary shape. In this way, the rotor parts 2, 3, the conductor 55 and the resistive material r form the integral rotor 8.
form.

Also, in the rotor part 2.3, both sides 10.11 of the rotor 8 are provided.
A plurality of ventilation cylinders 12... are provided which communicate with each other.

A stator 25.31 respectively faces the rotor part 2.3.
is provided concentrically with the rotor portion 2.3, and the stator 25.
31, a plurality of ventilation cylinders 60 connected to both sides of the stator;
will be established.

Bearing discs 15 and 16 provided on both sides of the cylindrical machine frame 14 are integrally assembled to both sides with bolts 17, cooling impellers 19 and 20 are attached to both sides of the rotor 8, and the rotor Both ends of the shaft 4 are supported by bearings 21.21 fitted in bearing discs 15.16, and the rotor 4 is rotatable.

As shown in FIGS. 1 and 2, windings 22, 23 are disposed concentrically on the outer side of the rotor parts 2, 3 as described above.
The rotating stator 31 and the second stator 25 are arranged side by side, facing each other. Also, at this time, as is clear from Fig. 1, the stator 2
The coil ends of the windings 22 and 23 protruding in the four directions of the rotation axis of 5.31 are provided so as to spread outward from the center of the stator 25 and 31 to the outside of the stator circumference, creating resistance between the plurality of rotor cores. Rotating shaft 4 of the variable speed induction motor according to the present invention provided with a material
To make it possible to configure the length of a direction to be short.

A sliding bearing 26 is installed between the machine frame 14 and the rotary stator 31, and the sliding bearing 26 is fixed in horizontal movement by a stop ring 28 fitted to the machine frame 14. The second stator 25 is a fixed stator fixed to the inner wall surface of the machine frame 14. A gear 33 is fitted on the outer circumferential surface of one side of the rotary stator 31 (2), and a drive device 2 is fixed to the outer circumference of the machine frame 14.
A small motor 35 for forward and reverse rotation consisting of 9 is provided with an outer frame 32, a drive gear 36 is pivotally attached to the small motor 35, and the drive gear 36 is engaged with the outer frame 32 to rotate the reduction gear 34. Installed so that it can move freely.

The reduction gear 34, which is partially inserted into the machine frame 14 through the opening 37, is engaged with the gear 33 fitted to the rotary stator 31, and is equipped with a switch that forms the drive device 29. - Rotating stator 31 via a rotating mechanism 30 consisting of a motor 35, a gear 33, a driving gear 36, and a deceleration gear 34.
A rotary stator 31 is connected to the voltage phase shifter, and the rotary stator 31 is rotatable, and the rotary stator 31 is rotatable in relation to the second stator 25 fixed to the machine frame 14. It is. code 38
is a solenoid that controls the entry and exit movement of the protrusion, and solenoid 38
is attached to the machine frame 14 and its protruding piece is freely engaged with the gear 33 fitted to the rotary fixed stator 31 (2). Includes a stopper to prevent it from turning easily unless necessary.

A small motor 72 with a fan 71 attached to the shaft is connected to the suction section 74.
A cooling device 73 is fixedly installed in a fan case 70 having an air exhaust portion 74B, and a cooling device 73 is fixedly installed in a fan case 70 having an air exhaust portion 74B.
I will contact you within 4 days.

A plurality of openings 39 are opened, and the plurality of openings 39 are formed into an arbitrary number of ventilation ports 65 and ventilation ports 66.
6 communicates with the suction lower 4A.

A plurality of ventilation holes 40... are bored in the bearing discs 15, 16.

Next, FIG. 3 shows a rotor portion 2 including a resistive material r and a conductor 55.
．． It is a side sectional view between 3 and 3. Ends 51 of rotor parts 2, 3
A plurality of conductors 55 formed by a conductor 56 and a conductor 57 having a curved portion are fixed in a continuous manner.

A resistive material r is placed around the conductor 55 fixed in a continuous manner.
Connect and weld. At this time, the resistance material r may be formed integrally with the conductor 55 by die-casting. The conductors 56 and 57 having curved portions were shown above, but in some cases the curved portion may be omitted.2) In that case, the conductor 56 and the conductor 57 may be aligned with each other by providing an arbitrary interval. be.

Incidentally, although the example in which the conductor 55 is formed by the conductor 56 and the conductor 57 has been shown, the conductor 55 is formed by the conductor 56 and the conductor 5 having a curved part.
7 are provided symmetrically and the combined portions are fixed by welding means such as spot welding (2), or may be integrally formed by die casting as described above. At this time, the conductor 56.
The cross-sectional shape of 57 can be arbitrarily selected.

By the way, in this embodiment, the voltage phase shifting device is shown to be based on the rotation of the stator, but the method of creating a phase difference between one stator and the other stator, such as a method of changing the wiring of the stator, is not limited to this embodiment. .

The configuration of the variable speed induction motor according to the present invention has been described above.

Next, a first embodiment of the present invention is shown in FIG.

The resistance material r has a zigzag shape along the rotor conductor 55 between the rotor cores 2.3, and the inside thereof is fixed to the conductor 55,
The other protrudes outward from the rotor conductor. In addition to the zigzag shape, the portion 80 fixed to the conductor 55 and its vicinity have a larger cross-sectional area of the resistive material r than the portion 81 protruding outward from the rotor conductor; The cross-sectional area of the resistive material r in the protruding portion 81 is smaller than the cross-sectional area of the resistive material r in the portion 80 fixed to the conductor 55.

Here, an example has been shown in which the resistance material r and the conductor 55 are fixed together, but the zigzag shape of the resistance material r may be formed by die-casting. In this case, it is preferable that the material of the resistive material r be aluminum or an aluminum alloy, and that the resistive material r and the conductor 55 be integrally formed by an aluminum die-casting method.

The zigzag shape of the resistance material r is such that the resistance material r is connected to the rotor 8.
By the rotation of 2), it promotes agitation of the atmosphere and acts as a cooling body 13, and those made of aluminum have fast heat conduction and enhance the heat dissipation effect.

In addition, since the cross-sectional area of the portion 81 of the resistive material r protruding outward from the rotor is smaller than the cross-sectional area of the portion 80 fixed to the conductor 55 and the resistive material r in the vicinity thereof, the resistance value is large and The heat generated by the resistive material r in the portion 81 that protrudes toward the outside is large, and the heat is concentrated in the resistive material r in the portion 81 that protrudes outward from the rotor.
Furthermore, in combination with the cooling effect due to the rotation of the rotor 8 described above, a large heat dissipation effect is produced.

Furthermore, as heat is concentrated on the outside of the rotor, where a large amount of heat is generated, moisture in the outside air and dust are baked into the surface of the resistive material, which deteriorates the insulation properties of the surface of the resistive material. Since impurities that are baked into the surface may cause a short circuit phenomenon, if at least the resistive material r is provided with an insulating material, the multi-stator induction motor of the present invention can achieve a stable resistance value of the resistive material r and a highly effective cooling effect. 2) It can operate stably and efficiently as an induction motor for a long period of time.

Next, a second embodiment of the present invention is shown in FIGS. 5 and 6.

The resistive material r consists of a disk 82 (2), and a conductive path 87 is formed in the disk 82 by a radial gap 83 and a gap 85 branching from the radial gap 83, and the conductive path 87 is formed between adjacent conductors 55. It is like connecting resistive materials r having arbitrary resistance values.

In this embodiment, the conductive path 87 formed by the gaps 83 and 85 is formed as follows.

The conductive path 87a formed outside the disk 82 has a certain cross-sectional area with the gap 85a, the gap 85b, and 83. This cross-sectional area is smaller than the cross-sectional area of the conductive path 87b formed by the disc inner gap 85C and the gaps 85d and 83. In other words, the pitch of the gaps 83 and 85 is set so that the cross-sectional area of the conductive path 87a on the outside of the disk becomes small.

Here, the resistive material r is made of aluminum, and is further coated with an insulating material except for the inner trowel region of the resistive material r.

The operation of this embodiment is almost the same as that of the first embodiment, so
Here, we will mainly explain the different parts.

Forming the resistive material r by a disk 82 differs from the first embodiment 2) in that the surface area of the resistive material r, that is, the heat dissipation surface can be increased regardless of the length of the conductive path 87. A surface area for heat dissipation can be ensured regardless of the length and resistance value of the resistive material r, and even if the disk 82 is the same, the conductive path 87, that is, the resistance value can be freely set.

Furthermore, even if the length of the conductive path 87 is the same in the same disk 82, if the arbitrary point 84 is short-circuited by some method, the resistance value can be lowered, that is, the length of the conductive path 87 can be shortened. By using the same parts, rotors 8 with different resistance values between adjacent conductors 55 can be formed, and a multi-stator induction motor with different characteristics can be easily formed.

Further, as in the first embodiment, the cross-sectional area of the conductive path 87 becomes smaller as it goes outward from the disk 82, so that the heat generated by the resistive material r is concentrated outside the disk 82.

The conductive path 87 shown here is an example 2), and it is possible to form the simplest conductive path or a more complicated conductive path 2), and is not limited to this embodiment.

For example, a radial gap extending from the circumference of the disk 82 and the center of the disk 82, for example, according to this embodiment, a conductive path is formed only by the radial gap 83, and the conductive path is connected between adjacent conductors 55 with a resistance value. It may also be connected so that it has.

(Not shown) The difference between this example and the second embodiment is that since the gaps forming the conductive path are only radial, the conductive path is formed linearly, so the resistance value of the conductive path is It is calculated more simply than in the second embodiment, and even when changing the resistance value, it is possible to easily determine an arbitrary point at which the gap is short-circuited.

Note that these resistive materials r can be formed by various methods such as, for example, laser cutting an aluminum material, press working, or as described above (forming integrally with the conductor 55).

By the way, as a third example, in the second example,
In order to make the cross-sectional area of the conductive path 87 smaller as it moves further outward from the disk 82, a measure was taken to change the gap pitch of the gaps 83 and 85. However, as another method, the gap pitch of the gaps 83 and 85 may be set to the same degree as the disk 82. A conductive path 87 is formed in the same manner as above, and the cross-sectional area at the center of the disk 82, in other words, the thickness of the disk 82, gradually increases as the distance from the center of the disk 82 outwards, the cross-sectional area of the inward conductive path 87b becomes smaller. Yo2),
By making the cross-sectional area of the outer conductive path 87a of the disk 82 small 2), the same effect as in the second embodiment can be obtained.

(FIG. 6) Next, a fourth embodiment will be shown. This embodiment is the same as the second or third embodiment except that a protrusion is provided to promote the heat dissipation stirring action.

In FIG. 7, the conductive path 87 provided on the disk 82 of the second embodiment is bent at an arbitrary angle with respect to the surface of the disk 82 to form a protrusion 88.
It was formed in This protrusion 88 allows the disc 82
The atmosphere is stirred, and by forming the protrusion 88, a ventilation hole 89 is provided in the disk 82. 2)
By stirring the protrusion 88 and passing the atmosphere through the vent 89, the heat generated by the resistive material r can be rapidly dissipated and cooled.

Incidentally, the protruding portion 88 and the vent hole 89 can be formed at the same time when the disk 82 or the disk 82 and the conductor 55 are integrally formed by die-casting.

Furthermore, although the protrusion 88 and the vent 89 may be provided only in the outer portion of the disc 82 which generates a large amount of heat, it is more effective if they are provided in the entire disc 82.

Next, what is shown in FIG. 8 is an example in which a plurality of resistive materials r are provided. By providing a plurality of resistive materials r in this way, it is possible to prevent the conductor 55 from deflecting outward due to high-speed rotation of the rotor 8, and to further enhance the cooling effect of the resistive materials r that generate heat during low-speed rotation.

As described above, compared to the resistance material r near the conductor 55 or the conductive path 87b inside the disk 82, the further away from the conductor 55 to the outside of the rotor 8 or from the center of the disk 82 The further away from the resistance material r or conductive path 87a
2) The resistance material r was formed so that the cross-sectional area of
By changing the gap pitch of the disc gaps 83 and 85 (2) and changing the thickness of the disc 82, it is possible to generate heat in the resistance material r (disc 82) outside the rotor 8, thereby reducing the amount of heat to other parts. Heat propagation can be suppressed. In addition, the disk 8
By forming the protruding portion 88 and the vent hole 89 in 2, and by forming the resistive material r or the disk 82 from aluminum, heat radiation cooling can be performed rapidly and effectively due to the rapidity of heat conduction.

Furthermore, the disc-shaped resistive material r is coated with an insulating material to prevent short circuits in the gap due to long-term use2).This prevents the burning of surrounding dust, moisture, etc. due to the heat generated by the resistive material r. This prevents short circuits between gaps and enables long-term use.

〔Effect of the invention〕

With the above configuration, it is possible to reduce costs by using common resistive materials, improve the heat dissipation effect by using the shape of the resistive material, the means for forming conductive paths, the material of the resistive material, etc., and suppress heat propagation. The insulating material improves the durability of the rotor and has a great effect.

Based on the above, by creating a phase shift in the rotating magnetic field between the two stators and diversifying the torque in total 2), we have expanded the use of induction motors of the type that improve variable speed or startability. It can greatly contribute to any field that requires high-torque variable-speed electric motors.

[Brief explanation of the drawing]

Fig. 1 shows a variable speed induction motor according to the present invention, and Fig. 2 shows a variable speed induction motor according to the present invention.
3 is a detailed view between the rotor cores of the variable speed induction motor according to the present invention, FIG. 4 is a front sectional view of the resistance material portion of the first embodiment, and FIG. FIG. 6 is a front sectional view of the resistive material portion according to the second embodiment, and FIG.
BB sectional view in the figure, FIG. 7 is a side sectional view (a) of the resistance material part according to the embodiment of FIG. 4, and a partial view of the C-C sectional view (b),
FIG. 8 is a front sectional view of a resistive material portion that effectively uses the second to fourth embodiments. 1... variable speed induction motor, 2, 3... rotor part,
4... Rotor shaft, 5... Rotor conductor, 6, 7...
Short-circuit ring, 8...Rotor, 10.11...Both sides, 1
2... Passage body, 13... Cooling body, 14... Machine frame, 15° 16... Bearing board, 17... Bolt, 19
．． 20... Cooling impeller, 21... Bearing, 22.23
... Winding wire, 25 ... Second stator, 26 ... Sliding bearing, 28 ... Stop ring, 29 ... Drive device, 30 ... Rotation mechanism, 31 ... Rotation Stator, 32・
...outer frame, 33...gear, 34...reduction gear,
35... Small motor, 36... Drive gear, 37...
... Opening, 38... Solenoid, 40... Ventilation port, 51... End, 55... Conductor having curved part, 5
6... Conductor, 57... Conductor, 60... Ventilation barrel, 6
5... Ventilation port, 66... Ventilation vent, 70... Fan case, 71... Centrifugal fan, 72... Motor,
73...Cooling device, 74A...Suction port, 74B...
- Exhaust port, 75... Support, 80... Part fixed to conductor, 81... Portion protruding outward, 82... Disc, 83... Radial gap, 84... Arbitrary position, 85
... Branched gap, 87... Conductive path, 88... Protrusion, 89... Ventilation opening, r... Resistance material (plate-shaped resistance material).

Claims (7)

[Claims] (1) A plurality of rotor conductors are installed in a continuous manner on a plurality of rotor cores that are mounted on the same rotating shaft at regular intervals, and the rotor conductors are connected to the plurality of rotor cores. A plurality of stators are formed, each having an integral rotor short-circuited between child cores by a resistive material, and stator cores facing each rotor core coaxially with the rotor,
At least one stator among the plurality of stators,
The voltage induced in the rotor conductor facing one stator,
In a multi-stator induction motor equipped with a voltage phase shift device that creates a phase difference between the voltage induced in a rotor conductor facing the other stator, a resistor that short-circuits and connects adjacent rotor conductors between rotor cores. The material is characterized in that the conductive path is provided so as to protrude from the rotor conductor to the outside of the rotor, and the cross-sectional area of the conductive path becomes smaller as the distance from the rotor conductor to the outside of the rotor increases. A multiple stator induction motor. (2) A plurality of rotor conductors are installed in a continuous manner on a plurality of rotor cores that are mounted on the same rotating shaft at regular intervals, and the rotor conductors are connected to the plurality of rotor cores. A plurality of stators are formed, each having an integral rotor short-circuited between child cores by a resistive material, and stator cores facing each rotor core coaxially with the rotor,
At least one stator among the plurality of stators,
The voltage induced in the rotor conductor facing one stator,
In a multi-stator induction motor equipped with a voltage phase shift device that creates a phase difference between the voltage induced in the rotor conductor facing the other stator, the resistive material that short-circuits the rotor conductor between the rotor cores is , is formed in a plate-shaped resistance material, and in order to secure an arbitrary resistance value between adjacent rotor conductors, the plate-shaped resistance material is formed by one or the other of a radial gap and a gap branching from the radial gap. forming a conductive path between the radial gap and the radial gap so that the cross-sectional area of the conductive path formed by the gap becomes smaller as the distance from the center of the plate-like resistor material increases. 1. A multi-stator induction motor, characterized in that one or the other side thereof is provided with a branching gap. (3) A plurality of rotating conductors are installed in a continuous manner on a plurality of rotor cores that are mounted on the same rotating shaft at regular intervals, and the rotor conductor is connected to the plurality of rotor cores. A plurality of stators are formed, each having an integral rotor short-circuited between the cores by a resistive material, and stator cores facing each rotor core coaxially with the rotor, and A phase difference is generated in at least one stator of the plurality of stators between a voltage induced in a rotor conductor facing one stator and a voltage induced in a rotor conductor facing the other stator. In a multi-stator induction motor equipped with a voltage phase shifting device, the resistive material that short-circuits the rotor conductors between the rotor cores is formed in a plate-shaped resistive material, and the plate-shaped resistive material is The plate-shaped resistance material is formed so that its thickness gradually decreases as it moves away from the rotor conductors.In order to ensure an arbitrary resistance value between adjacent rotor conductors, a radial gap is formed in the plate-shaped resistance material and from the radial gap. 1. A multi-stator induction motor characterized in that a conductive path is formed by one or the other side of a branching gap. (4) A plurality of rotor conductors are installed in a continuous manner on a plurality of rotor cores that are mounted on the same rotating shaft at regular intervals, and the rotor conductors are connected to the plurality of rotor cores. A plurality of stators are formed, each having an integral rotor short-circuited between child cores by a resistive material, and stator cores facing each rotor core coaxially with the rotor,
At least one stator among the plurality of stators,
The voltage induced in the rotor conductor facing one stator,
In a multi-stator induction motor equipped with a voltage phase shift device that creates a phase difference between the voltage induced in the rotor conductor facing the other stator, the resistive material that short-circuits the rotor conductor between the rotor cores is , is formed into a disc-shaped resistance material whose thickness gradually decreases as it moves away from the center, and
In order to secure an arbitrary resistance value between adjacent rotor conductors, a conductive path consisting of one or the other of a radial gap and a gap branching from the radial gap is formed in the plate-shaped resistance material, and One or the other of the radial gap and the gap branching from the radial gap is arranged so that the cross-sectional area of the conductive path formed by the gap in the plate-shaped resistor material decreases as it moves outward from the center of the plate-shaped resistor material. A multiple stator induction motor, characterized in that: (5) From claim (2), the rotor conductor between the rotor cores is provided with protrusions having heat dissipation and stirring functions on the surface or the circumference of the plate-like resistance material that short-circuits the rotor conductors between the rotor cores. 4)
The multiple stator induction motor according to any one of the above. (6) Any one of claims (1) to (5), wherein the resistance material or plate-shaped resistance material for short-circuiting the rotor conductors between the rotor cores is formed of aluminum or an aluminum alloy made of aluminum. A multiple stator induction motor according to claim 1. (7) From claim (1), the resistance material or resistance material that short-circuits the rotor conductors between the rotor cores is one in which the entire resistance material is insulated except for a certain area inside the panel. (6
) A multiple stator induction motor according to any one of the above.