KR790001848B1 - Electric induction drive assemblies - Google Patents

Abstract

A rotor was consisted of many rotor rods installed radially between the internal and external short-rings and located on the same azis of loads. A stator having the windings to generate the magnetic field towards the direction of axis was able to adjust the position of stator according to high and low loads and then able to maintain a constant distance between a stator and a rotor.

Description

Electric induction drive

1 is a side view of the rotor used in the drive device of the present invention as seen from the stator side;

FIG. 2 is a cross sectional view of the rotor as seen from FIG.

3 is a side view of the stator and support structure for use in the rotor of FIGS.

4 is a cross-sectional view of the stator with the windings removed from the third line IV-IV.

FIG. 5 is a front view of the parts shown in the above drawings assembled in a state in which they can operate, but omitting the cooling fan blade.

6 is a side view of the stator and the support frame in a state in which the stator is disposed in a support frame differently;

FIG. 7 is a front view showing a method of fixing a support frame such as the sixth diagram in a proper position. FIG.

8 shows a front view of an improved form of the drive adapted to drive a pair of stators and a single rotor.

9 is a front view showing an improved type of drive in which a single stator drives a pair of rotors.

The present invention relates to an electric induction lamp, in particular a lateral air gap induction motor.

The axial void induction motor eliminates the drawbacks found in conventional cylindrical induction motors. For example, the rotor of an axial air-gap motor is entirely supported by a load driven by the motor so that the motor itself does not need the rotor bearings and the parts that are required in a conventional cylindrical motor. However, axial air-gap motors have been largely unsuccessful because they are designed to relate to many of the shortcomings and limited shapes of conventional cylindrical vibrators. For example, some known designs relate to special purpose electric motors and pumps or compressors. The stator part and the rotor and pump or compressor parts are placed in separate assembly housings which are joined via a seal between them. The motor part is integral with the load device as a whole and the two housing parts are designed and manufactured to be joined together to form a single housing assembly, so the motor is not suitable for general purpose applications as in conventional motors. In addition, there is a problem in the cooling of the motor because the entire motor is surrounded by the housing parts.

For example, if the stator windings are missing, there is a problem that electrical technicians must disassemble the known combinations to repair and repair them. This may not be a very controversial issue for a large number of skilled workers. Unexpectedly, repairing or maintenance work is not only a difficult problem, but especially if the electric motor is used continuously for a long time, such as a product having a seasonal characteristic, for example, processing of agricultural products. Cause difficult problems.

Another drawback of known induction motors, whether known or axial air gaps, is their inability to change their speeds or to change them without complicated and expensive accessories. For example, depending on the nature of the product to be processed, it is necessary to change the speed of the vibrator from time to time to change the operating speed of the plant or to operate the plant at high speed. In the former case, it is necessary to use a variable transmission, which is expensive but less efficient and less reliable. In the latter case, the vibrator must be completely replaced.

An object of the present invention is to provide an electric induction drive device that does not require maintenance, the electric induction drive device of the present invention can be inspected and maintained by an inexperienced technician and shifted or assembled.

According to one embodiment of the present invention, the electric induction drive device of the present invention is such that the cylindrical core of the magnetic body is installed inside, and a plurality of rotor rods are radially installed between the inner and outer short-circuit rings and can be coaxially attached to the side of the load. A stator comprising a cylindrical rotor, a cylindrical body made of a magnetic body having a winding arranged to generate a magnetic field axially on one side of the core, the position of the stator facing one side of the rotor by adjusting its position with respect to the load axis And a support frame for supporting the stator in a state in which it is separated from the stator so that a constant distance is maintained between the stator and the rotor core, and the stator and windings are supported without moving the support frame even when the driving device is operated. Consisting of a device for removably fixing the stator core to a suitable position within the support frame for removal and replacement in the .

As is well known in the art, when a load is applied by a lamp, the so-called half-coupling is fixed to the load input shaft and the motor output shaft, and the motor is placed after the input shaft and the output shaft are coaxial. The half-cowlings are seated together in a bowl. The rotor of the drive can be simply fixed to the shaft using a screwdriver, wrench, or Allen key, as it is simply configured to be fixed to the load shaft in the same way as a conventional half-cowling. Plate-like rotors, such as the cylindrical squirrel rotors used in conventional cylindrical induction motors, are safe for all purposes and need not be exercised once installed. The stator and the support frame are fixed at a proper position before and after fixing the rotor, which will be described later. If the rotor is fixed to the shaft and the speed of the drive is adjusted to the load, the drive can be used for various purposes and can be sold without assembly.

As mentioned above, the rotor is virtually not electrically destroyed and only the stator windings are electrically lost.

The stator and its associated windings can be removed without disassembling the support frame, and if the stator windings are lost, even inexperienced personnel can change cores, eliminating the need for a skilled electrician or engineer.

In addition, the stator core and the windings can be easily replaced, so that the speed of the motor can be simply changed by removing the stator to replace other stators of the same size with different number of poles and different synchronous speeds. The shape of the support frame according to the present invention is composed of a stator core fixing device composed of, for example, a cylindrical frame having an end coaxially arranged with a stator core and a plurality of bowls connected to an inner center through a hole formed in the frame. . Cores and windings can be removed by simply removing the cores and windings from the framework by dismantling the bolts, so that the core can be removed and replaced in minutes if the core to be replaced is close.

The device for fixing the stator core is composed of a plate body fitted into the frame to fit in the frame, the stator is fixed so that the outer peripheral surface is isolated from the plate body.

In this arrangement, the plate is fitted in the frame, so that when the core is replaced, the core can be easily fixed by inserting a number of bolts into the threaded holes in the core through the holes in the plate. In this way, the core and the windings can be easily and quickly dismantled from the plate body and simply exchanged by being attached to the frame and attached to the frame.

According to another example of the present invention, the bolt is directly inserted into a screw installed in the stator core without a plate, and such a device has the advantages of low cost and simple structure, and has an advantage of good air circulation between the core and the frame. It is suitable for installation of stator with winding wound on both sides of stator.

The support frame includes a substrate fixed to a cylindrical frame and lying on a plane parallel to the frame.

The support frame placed on the substrate moves the rotor and stator coaxially until the required voids are formed between their opposing surfaces. Since the rotational force transmission between the stator and the rotor supported only by the load shaft is electronic, not mechanical, the installation step does not require skilled work as is necessary to install a conventional cylindrical induction motor. In fact, in the well-known pore-type electric motor, it is difficult to accurately set the spacing between the rotor and the stator to fix them in the housing. However, in the driving apparatus of the present invention, the air gap is theoretical as well as the shaft is slightly distorted or a gap appears. It has been found that even in the case of a significant change in efficiency, it operates satisfactorily without significantly decreasing efficiency or vibrating violently. This fact indicates that the position of the stator support frame can be made by skilled workers. The supporting frame shall be moved until the rotor and stator are somewhat coaxial and the average width of the measured voids is within the theoretical range of 2.5mm to about 10% for a 1 hp motor. Of course, the substrate is drilled so that it can be fixed with a suitable fixture such as a bolt when the support frame is in the correct position.

Another method of securing the support frame is to attach the frame to the casing of the load or to the frame in which the load is installed by attaching a number of radial sockets that engage the fixture to the cylindrical frame, thereby fixing the support frame to a surface perpendicular to the frame. have. In this case, although the rotor may be fixed to the coaxial of the stator when the frame is installed indoors, it may be convenient for the rotor to be fixed to the outside of the stator by passing the load shaft through the center of the stator.

The phenomenon seen in known axial air-gap motors is seen in the axial thrust imposed on the rotor by the electromagnetic action between the rotor and the stator.

The rotor and stator will react against each other at full speed while the axial air-gap induction motor is stationary, and the repulsive force that appears at this time will decelerate as the speed increases and fall from about 45% of the synchronous speed to zero. The repulsive force becomes one of the suction forces above the full speed operation speed and the operation speed during the normal operation of the driving body, and the repulsive force changes according to the stator current due to the electronic characteristics of the stator.

Axial trust is rarely a problem when the load shaft is supported by a good thrust bearing, but if the load shaft is not equipped with a thrust bearing or the thrust bearing is worn, the axial thrust reduces the width of the air gap below the allowable limit or extremes. This may cause friction between the stator and the rotor.

The drive device according to the present invention has a plurality of electromagnets magnetized by electric current flowing through the stator windings to minimize the electromagnetic attraction force between the rotor and the stator during normal operation.

The rotor has an electrically conductive nonmagnetic portion positioned opposite to the electromagnet that is electromagnetized under operating conditions such that the repulsive force between the rotor and the driver generates an electromagnetic repulsive force that cancels the magnetic attraction between the stator of the rotor.

In some cases it may be sufficient to partially cancel the magnetic attraction force, but it is better to allow the two forces to completely cancel each other out.

The two forces are dependent on the current flowing through the stator windings, so they cancel each other if the current is changed by a change in load rotational force. Moreover, the two forces depend on speed, so if the speed of the motor changes with the load, they actually cancel each other out.

The electromagnet consists of a magnetic yoke with pole changing portions of the stator winding wound around them. This approach allows the use of windings that do not have an effective effect, thus at least preventing copper losses. Electrically conductive nonmagnetic parts and electromagnets are mounted on the outer or inner circumferential surface of the rotor as required.

As described above, when the stator core is mounted on a plate fixed in the cylindrical frame, the yokes are axially laid on a plate between the outer circumferential surface of the stator core and the frame. This spacing accepts the translating parts of the stator windings, so there is no need to increase the size of the stator support frame to accept the yoke.

If the electrically conductive non-magnetic part of the rotor is on the outer circumference of the rotor (with the rotor rod and inner short ring), they are integrally cast to the outer short ring in a single operation.

According to a suitable design, the electrically conductive non-magnetic portion of the rotor is in the form of a continuous ring that is projected over the entire outer circumferential surface of the rotor and lies on a plane perpendicular to the rotor axis.

If the drive is multiphase, the continuous ring can be protected by a simple method of distributing the electromagnets in a suitable manner by distributing them in phase, even if the non-conductive portions of the electrically conductive non-continuous portion are maintained.

Although the driving device of the present invention is not installed in the casing, it is cooled better than the known devices, but in some cases it is necessary to cool it. In this case, the cooling fan blades are attached to the electrically conductive nonmagnetic portion of the rotor and the outer short ring.

According to a special example of effectively implementing the present invention, the windings are disposed in the grooves on both sides of the stator core so that the magnetic field diverges axially from both sides of the core, and the second rotor is opposed to one side of the stator core. The two rotors are installed to rotate in the same direction of rotation. This arrangement yields twice the rotational force from the stator of the specified size.

In the stator of a conventional cylindrical induction device, copper (or other conductive material) forming the pole change portion of the winding has no useful effect. The ratio of insoluble copper and availability copper, ie, the core in the core groove, is usually 1.25: 1. Use of insoluble consent only results in loss of expenses. In axial air-gap motors with cylindrical stator cores the electrical ratio is reduced and can be reduced to 1: 1. However, there is still a lot of loss of motion. However, in the apparatus using the two rotors described above, the amount of unnecessary motion can be significantly reduced. The windings on both sides of the stator core are formed together and the conductors are inserted from the outer outlet of each groove so that they are axially directed on the outer peripheral surface of the stator up to the adjacent groove on the opposite side of the core.

In this way, insoluble copper is not recommended on the inner and outer circumferential surfaces of the core, but only passes through the axial width of the stator core, thereby reducing the amount of insoluble copper used. Larger stator cores reduce the ratio of the axial width to the outer circumferential diameter of the core, further saving copper in large drives. In other words, as the size of the stator core increases, the ratio of insoluble motion to usability dynamics approaches.

Hereinafter, various examples of the present invention will be described in detail with reference to the accompanying drawings.

The rotor used in the electric drive apparatus according to the present invention is shown at 10 in FIGS. 1 and 2. The rotor 10 has a core 12 of a laminated magnetic body in the form of a spiral wound around a magnetic steel wire, and the core 12 is provided with a groove 14 radially concave from the inner circumferential surface to the outer circumferential surface side. . The groove 14 is oriented slightly inclined by one circumference, rather than an exact radial in order to drive the drive smoothly. Although the groove 14 is shown only in a portion of the core 12 in FIG. 1, it is formed at regular intervals throughout the core.

In each groove 14, an aluminum alloy rotor rod 16 is inserted so that their inner and outer ends are fitted into the inner and outer short rings 18 and 20, respectively. The rotor thus formed is a design variant of the cylindrical squirrel rotor used in conventional cylindrical induction motors. The power balance ring 22 integrated with the ash short circuit ring 20 slightly protrudes to be plunged on the outer circumferential side of the front face 24 of the core 12 and has a plurality of cooling fan blades 26 for cooling.

The hollow cylindrical steel boss 28 is fixed to the inner side of the inner short ring 18 and the groove 30 is formed on the inner circumferential surface of the boss 28 to fix the rotor 10 to the axis of the machine to be driven. To be able. In order to fix the rotor 10 in a proper position, the rear end of the boss 28 is projected from the rear surface 32 of the core 12, and a hole 36 is laid at the rear end of the boss 28 so that the bolt ( 34 can be threaded into the boss 28. In addition, the tip of the boss 28 may be provided with a request 38, and a hole 42 may be formed in the request 28 so that the bolt 40 can be fixed to the tip of the boss 28.

Referring to the manufacturing method of the rotor 10 shown in FIGS. 1 and 2, the core 12 having the grooves 14 is formed, and then the rotor rod 16 and the inner and outer short circuit device 18 are formed. 20, the power balance ring 22 and the fan blade 26 are formed in the core 10 in a single centrifugal casting process. That is, the molten alloy is injected into the center while rotating the core 10 so that the molten alloy flows through the recess 14 in the mold. The boss 28 is attached to the inner short ring 18 during the casting operation. This centrifugal casting method is well known in the method of forming a known cylindrical cage rotor, and thus will not be described in detail.

3 and 4 illustrate a stator and a support frame which are assembled with the rotor shown in FIGS. 1 and 2 to form an electric induction drive device. The basic component of the stator is the annular laminated core 50. Like the rotor core 12, the stator core 50 is formed by continuously winding a magnetic steel wire spirally. The bar slot 52, which forms a plurality of slots 52 on the front surface 54 of the core 50, is formed by mechanical methods such as milling and cutting. The slot 52 may be in any suitable form known in the art, but FIG. 4 illustrates that the opening side of the slot is narrower than the inner side.

3 shows a state in which the winding 56 is fixed in the stator core slot 52, showing four windings 52, and the driving device also has four poles. Moreover, in this case only the windings 56 for the single phase are shown.

Since the stator can be wound in a manner similar to the winding method of a conventional cylindrical stator and the core is wound to obtain a single phase or a polyphase, it is known in the art to further explain the installation of the windings.

After fixing the winding 56 to the core 50, it is dried by impregnation with the varnish by a known method in order to improve the resistance to moisture. If necessary, the core and the windings may be coated with an epoxy resin.

The core 50 forms four threaded holes 58 on the back side, and inserts the bolt 62 inserted into the hole formed in the annular backboard 60 into the threaded hole 58 to displace the core 50. Fix to (60).

At the outer periphery of the back plate 60, a circular flange 64 is formed to facilitate fixing the stator to the stator support frame.

Winding 56 is connected to the terminal box 65 fixed to the back plate 60 is connected to the external power supply cable.

Four yoke 66 made of a magnetic material is integrally formed on the back plate 60 as shown, but does not have to be integrally formed and may be attached to the back plate 60. A loop 70 is formed in the outer pole converting portion 68 of the stator winding so that when the stator winding is fixed to the backplate, the loop 70 surrounds the yoke 66 as shown in FIG.

The stator support frame consists of a cylindrical frame 72 welded to the plate base 74, the frame 72 being supported by the plate base 74 and the support 76 welded to the sides of the frame 72. A large number of holes 78 are laid in the base 74 so that the stator support frame and the stator can be fixed in a proper position by subtracting the fixing device to the hole 78.

The stator core and back plate 60 are fixed at the proper position of the frame 72 by screwing four bolts 80 into the threaded holes of the flange 64 through holes bored in the frame 72.

FIG. 5 shows a state in which the parts shown in FIGS. 1 to 4 are placed under load to form an electric induction driving device. More specifically, the load 90 having the input shaft 92 is fixed to the base 94 of the floor or part of the building in which the factory is installed. The rotor 10 is fixed to the bolt 34 or the bolt 40 by subtracting the shaft 92. The stator support frame is moved so that the front face 54 of the stator core 50 faces the front face of the rotor core 12 such that the voids between the two opposing surfaces 24 and 54 are substantially coaxial. Adjust the position until the width substantially matches the theoretical void for the particular drive. As an example, a type of drive that generates two horsepower outputs has an outer circumference of the stator core of 7 inches and a gap of 2.5 mm.

As can be seen from the above-mentioned detailed description, the above-described installation process does not require much precision, and therefore can be installed even without skilled workers. When the stator and the stator support frame are correctly positioned, the support frame can be fixed by subtracting the bolt into the hole 78 of the base 74 and attaching it to the base plate 94. The load 90 and the stator support frame should be installed at the same height, so the load shaft 92 is difficult to adjust the height thereof, thereby cutting or raising the base plate on which the stator support frame is attached to adjust the height of the stator support frame.

When power is supplied to the stator windings to operate the motor, the rotor field generated in the stator windings diverges from the front face 54 of the stator core into the rotor core 12 and is interrupted while passing through the rotor rod 16. Rotor 10 is rotated at a speed slightly less than the rotational speed of the magnetic field as in a conventional cylindrical induction motor.

As described above, magnetic attraction is generated between the rotor core and the stator core while the drive is operated at its normal operating speed. To at least partially offset this force, an electrodynamic repulsive force is present such that no axial excess thrust is transmitted to the shaft 92.

As can be seen in FIG. 5, the yoke 66 attached to the back plate 60 of the stator is positioned opposite the power balance ring 22 of the rotor 10, so that the magnetic field generated by the yoke is ring ( By inducing the current in 22, it creates a counter-magnetic force that leads to the repulsive force between the yoke and the ring. Since the magnetic field generated by the yoke 66 depends on the current of the stator windings, the repulsive force varies with the current drawn by the stator. Therefore, the electromagnetic force and the electric power are proportional to the electric current, so they cancel each other regardless of the electric current drawn by the electric motor.

Removing the stator core from the drive to replace, service, or repair the stator core when the drive is placed under operating conditions as shown in FIG. 5 is not only a very simple task, it can also be done by a skilled worker. . In this case, the necessary work is simply dismantled by dismantling the bolt 80, removing the back plate 60 and the stator core together from the frame 72 backwards, and inserting the serviced or tested cores or replaced cores in the reverse order. Can be assembled. If the stator core is missing or replaced, or if you want to insert a new core with a different number of poles to change the speed of the drive, keep the new core close and the drive will have a total downtime of only 2 or 3 minutes. It only takes about.

In the case of replacing the core, the core may be attached to a new board in advance to insert a new core and a new board, or to reduce the cost of spare parts, the bolt 62 may be dismantled to remove the old core and simply replace it with a new one. have.

Changing the stator core is quick and easy and does not require disassembly or disassembly of the entire device.

Apparatuses for separating the core, such as the bolt 80 and how to use them, are also known to unskilled workers.

The rotor 10 is exposed to the air without a housing, and the air can be freely circulated around the stator windings so that the rotor 10 can be operated at a significantly lower temperature, so that the driving body can be operated without cold cooling. There will be no.

FIG. 6 shows an improved stator and support frame, which is constructed as shown in FIG. 5, consisting of a circular frame 72 'fixed to a base 74'. However, the improved support frame has an assembly device consisting of four sockets 100 of short length steel pipe protruding in the axial direction of the stator core and the frame and welded to the outer circumferential surface of the frame. With this variant assembly, the frame 72 'can be fixed to a surface that is oriented parallel to the axis of the frame towards the casing of the load, as shown in FIG. 7, e.g. screw or bolt 102 ) Can be fixed by screwing into the threaded hole 104 on the surface through the socket 100. In the case of using such a modified assembly method, it is easy and necessary to install the rotor outside the support frame as shown in FIG.

In this case, the inner diameter of the cylindrical stator core must be large enough so that the internal pole change of the stator winding does not interfere with the load axis. Although the rotor 10 is installed on the outer shaft of the stator support frame, the secondary operation is a simple operation of removing and replacing the rotor 10, so the replacement of the stator core is extremely simple.

However, it is also possible to install the rotor inside the stator support frame, as shown in FIG. 5, in order to allow the rotor 10 to be subtracted from the surface to which the frame 72 'is attached.

The improved form of FIG. 6 can be replaced with the modification facility formed by the socket 100, as shown in FIG. 7, without the need for the substrate 74 '.

6 illustrates a method of installing the stator core in the stator support frame. For the convenience of the method, the method may be coupled to the support frame of FIG. 3 or 4 for convenience.

In the improved installation method, there is no back plate 60 but instead a radial spiral hole 106 is formed in the stator core, so that the bolt 80 'is screwed into the screw hole 106 through a hole in the circular frame 72'. The stator is placed in the interior space of the frame 72 '. In this case, sufficient space is formed between the outer circumference of the core and the inner surface of the frame 72 'for the outer pole change of the stator core winding.

FIG. 8 shows an improved arrangement in which a pair of stators 110 and 112 are adapted to drive the rotor 114 fixed to the shaft 116, the two stators being associated with the rotor in the manner described above. It can be fixed in a proper position. In the arrangement according to Fig. 8, the installation and replacement of the stator core winding is as simple as in the other arrangements described above. To remove the stator windings, the core of the stator 112 is first removed as described above, then the rotor is pulled out of the support frame of the stator 112 and then the core of the stator 110 is removed in the same way.

FIG. 9 shows an improved form in which the pair of rotors 120 and 122 fixed to the shaft 124 is driven opposite to that of FIG. 8 by a single double-sided fault 126. Has coil slots and windings. This arrangement doubles the current load of the unit and is therefore more effective than the one side stator described above. As described above, in the arrangement of FIG. 9, the two windings are merged, thereby saving the core winding and the like. That is, as shown in FIG. 3, the winding does not cover the entire outer circumferential surface of the core but is introduced to the slot on the opposite side of the core through the circumferential direction of the slot outside the core, thus saving a large amount of copper. The production cost of the stator core can be greatly saved.

According to the arrangement of FIGS. 8 and 9, the windings of the stator must be arranged so that the generated rotational forces do not merge or direct directly to the shaft. For example, in the form of the winding as shown in FIG. 9, each conductor extending radially outward from the slot on one side is directed inward along the slot on the other side so that the current in the portions of the windings in the slot Radially in opposite directions on both sides of the stator. As a result, the magnetic field comes out in the opposite direction of rotation from each side of the stator, so that they come out in the same direction from one side of the stator, giving the rotor a single rotational force.

Both the arrangements of Figs. 8 and 9 are infinitely complex like sandwiches, which increase the output of the drive indefinitely but do not increase the transverse size of the entire unit or the centrifugal force that each of them receives.

Various forms of the drive device and their models can be improved within the scope of the present invention. For example, the shorting ring of the rotor and the rotor rod need not be integrally formed by the centrifugal casting method. The shorting rings can be fixed to the core by heat shrink or the like and the rotor rod can be inserted into the slots in front of the core and welded to the shorting ring at their ends.

The magnetic yoke 66 generating power to cancel the magnetic attraction force between the rotor and the stator and the power balance ring 22 co-operating therewith can be adjusted in various ways other than as illustrated in the specific examples described above. For example, the number of commonly used yoke is used. The yokes can also be distributed in phases, which arrangement can be particularly useful when the power balance ring is not continuous, for example configured by cooling fan blades.

The yoke 66 may be substituted for having suitable cross sections other than a circular cross section as shown. In unusual cases, such as when the power balance ring is discontinuous, a rectangle such as crescent moon may be advantageous. In this case, the cooling fan blade itself is formed. In addition, the yoke may be formed long enough to connect a plurality of fan blades, so that the current mechanical repulsive force may be continuously emitted.

In any case, the annular cores of the rotor and stator may not be nearly disc shaped as shown. In other words, it is possible to reduce the ratio of the thickness to the outer circumference so that the core becomes a thin ring shape. In this case, it is convenient to form the core in a manner different from continuous spiral winding.

In this improved driving body, the efficiency is high, the speed is low, and the torque is large. If the core surface area determines the power ratio of the drive body and the outer peripheral area increases in the outward direction, the loss of area caused by accepting this form is simply compensated by slightly increasing the outer diameter of the core.

In the foregoing feature, the rotor can be formed like a half-cowling used for the conventional connection of the motor and the shaft such that the rotor is easily connected to the shaft. However, in some special applications, the rotor may be integrally formed on the shaft, or otherwise fixed to the shaft and coupled to the load to be driven. For example, if the load has a flywheel, the rotor can be inserted into the flywheel; if the load is a compressor or a pump, the rotor can be placed in a rotary part (eg a rotor blade). The rotor can also be inserted into most liquids or gases.

The stator and the windings can be exchanged by means other than the one described above without moving the support frame. For example, the core and windings may be flat-etched and placed in a suitable position on the support frame or inserted and detachably attached by creep or kit in a suitable manner.

It can also be used directly as a mechanical output element in view of the fact that the rotor is a strong solid material and not electrically damaged. For example, gears may be formed on the rotor on the inside, outside or side of the core, in which case the rotor may directly drive a gear train, such as forming a front gear in the gearbox.

The drive device of the present invention can be easily and quickly replaced by a stator core having a different number of poles in order to adjust the operation speed, as well as to change the power ratio of the drive device by replacing the stator core with a small power ratio. have. In this way, the speed and output of the drive can be changed immediately.

The various types of drive devices described above have been described as being assembled horizontally, such as driving a load having a horizontal input shaft for ease of understanding, but may be arranged to drive a vertical or inclined shaft.

Claims (1)

The rotor and core are composed of a plurality of rotor rods radially laid between the inner and outer shorting rings on the inner and outer shafts of the annular core made of magnetic material and the inner and outer shorting rings, and are capable of being coaxially attached to the load. The stator having a cylindrical annular core made of magnetic material with windings arranged to generate an axially flowing magnetic field on one side is positioned so that the stator core face and the rotor core face face each other by adjusting the position with respect to the load shaft. The stator core and the windings on the support frame are moved without supporting the stator with the support frame and the stator and the rotor so that the stator core and the rotor are separated from the support frame without moving the support frame. Removably attach the stator core to the position required for the support frame for removal or replacement. The electrical induction driving device.

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