JPS5840795Y2 - Linear induction motor with polyphase annular winding - Google Patents

Description

[Detailed description of the invention] The invention consists of a polyphase stator with an annular winding that enters the groove on three sides, and a reaction section that is generated from a ferromagnetic material rail with a U-shaped cross section that surrounds the stator on three sides. The present invention relates to a linear induction motor having a ferromagnetic material whose inner surface is coated with a conductive layer as a reaction rail.

This kind of linear induction motor acting on three sides is superior with a small leakage at υ in a simple construction, because the working surface of the stator is proportional to the induction motor acting only on both sides for the generation of propulsion force. This is because it has expanded significantly.

The stator of this type of linear induction motor, detailed in U.S. Pat. There is.

The stator poles are fixed to a common mounting plate.

This kind of motor structure has a power of several megawatts and about 5
This is inconvenient for speeds of 00 Km/h.

The object of the invention is to provide a linear induction motor which, as mentioned at the outset, requires only a small construction outlay and losses, and which, when used for the drive of high-speed vehicles, meets the high mechanical and electrical demands. .

According to the present invention, the stator has a longitudinally divided stator core with two core laminations having mutually perpendicular lamination directions, and the core laminations are constructed without grooves. , a U-shaped tooth root plate body is provided as a stator tooth, which is placed on the stator core on three sides, and the lamination direction of the U-shaped tooth lamination body is the same as the lamination direction of the two core lamination bodies, respectively. is solved in such a way that it is perpendicular to .

According to the above-mentioned structure of the present invention, the lamination direction of the two core laminated bodies is perpendicular to the respective adjacent portions of the U-shaped ferromagnetic material rail, so that the two core laminated bodies are The effect is that the respective emerging partial magnetic flux enters and exits vertically into the respective part (casing or yoke part) of the U-shaped rail used as a magnetic short-circuit, whereby eddy currents can be minimized. achieved.

A significant advantage of this kind of configuration is that the end face side inside the motor can be stratified in a manner adapted to the magnetic flux outflow, and two separate core strata with different stratification directions can be formed on the stator core. This gives high rigidity to the

It is advantageous to construct the core laminate without grooves and to provide U-shaped tooth laminates, which are preferably placed as stator teeth on three sides of the stator core.

This eliminates the need for drilling complex groove profiles and also allows the prefabrication of complete coils, which can be placed on the stator core prior to the installation of the tooth laminates.

According to an advantageous embodiment of the invention, the layering direction of the two core layers corresponds to the course of the active conductor section belonging to each annular winding.

In this way, in addition to low eddy current losses, the fixing bolts and connecting rods are short relative to the core laminate.

This is because the height and width of a high-speed linear induction motor are very small compared to its length.

A simple fixation of the U-shaped tooth stack is ensured in the following way: Advantageously, the three working outer surfaces of the stator core are provided with shallow grooves.

Advantageously, the free ends of the lateral legs of the U-shaped tooth stack project from the stator core in order to secure the tooth stack to the fixing element of the stator core.

By doing so, at the same time the operating area of the motor can be further expanded.

Another embodiment of the invention consists in the following points: the corners of the working external surface of the U-shaped tooth laminate are rounded in order to avoid non-uniformities that increase losses in the effective magnetic field.

Advantageously, the fixation of the winding coils entering the stator core is achieved in the following way, i.e. by bending the outer laminate of each tooth lamination into a groove as a support for the clearance chain at the tooth head. I have to.

According to a special embodiment of the invention, the core laminations are fixed to each other through the stator fixing perforations and fixed to the self-supporting unit by means of the toothed laminations, so that the weight of the stator No special core support is required to increase the core support.

In an advantageous further embodiment of the invention, an induction motor is used as a drive for an electromagnetically suspended and guided floating vehicle with ferromagnetic rails in the reaction section, and at the same time guide rotor rails in the support and guidance system of the floating vehicle. Use as.

In this way, the cross-section of the ferromagnetic rail is also commonly used for the linear induction motor and for the support and guidance system of the floating vehicle, which is advantageous in terms of material and cost savings for the trajectory of the floating vehicle.

The ferromagnetic rail has a large supporting moment due to its U-shaped cross-section and thus results in relatively few fixing points.

Also, the probability of mechanical damage is small.

Furthermore, this kind of simple support guide and drive system is particularly advantageous for track branching, since the system mounted on the vehicle,
This is because an unrestricted horizontal movement occurs in the transverse direction of the track for the stator and the supporting and guiding magnets of the linear induction motor on one side only.

It is advantageous to achieve narrow pole faces corresponding to the pole faces of the electromagnets of the support and guidance system of the ferromagnetic rails acting as rotor rails, i.e. the lower lateral legs of the ferromagnetic rails have a U-shaped cross-section. Two webs protrude downward at opposite intervals, and below these webs there are provided support and guide magnets for the support and guide system of the floating vehicle.

Next, the present invention will be explained in detail using the illustrated embodiment.

The linear induction motor shown in FIG. 1 has a stator 1. The linear induction motor shown in FIG.

One of the narrow longitudinal edges is configured to be suitable for fixing to a vehicle, and the other three longitudinal edges are provided with a fixed mounting rail 3 having a U-shaped cross section and a reaction rail 4 whose internal surface is electrically coated. It is surrounded by a reaction part 2 of an induction motor with a gap 5 interposed therebetween.

The stator 1 has a stator core 6, which consists of a main core lamination 7 and an end core lamination 8.

A large number of rectangular winding coils 9 are mounted on the stator core 6, and these coils are interconnected in a polyphase annular winding.

A defined laminated plate 10 having a U-shaped cross section is provided between adjacent winding coils 9, and this laminated plate (see FIG. 2) is fitted into a shallow groove 11 on the surface of the stator core. 1
It is.

Frequently, the groove 11 can also be omitted.

The main core lamination 7 consists of laminated plates having the length of the entire working part of the stator 1, these laminae being laminated successively in the running direction of the adjacent coil conductors.

The lamination direction of the thin plates of the end face core laminated body 8 runs in the vertical direction.

In this way, the total magnetic flux of the motor exiting from the stator core 6 to the rail 3 used as a magnetic return path as well as the magnetic flux entering the stator core 6 are stratified to reduce eddy currents.

The end core laminated body 8 has end plates 12 and 13, and these plates are welded to each other using fixing bolts 14 through the leg portion 15 of one end plate. .

The leg portion 15 has a large number of notches 16 shown in FIGS.
7 is fixed.

The notch 16 is shaped so that the head 18 of the connecting rod 17 can enter at a predetermined angular position and then be rotated through 9000 degrees and held fixed.

90° angle - limit of rotation by two pins 19 or leg 1
guaranteed by two stages of 5.

The legs 15 are therefore used as pressure plates for the main core laminate 7.

On the reaction side of the main core stack 7 a connecting rod 17 acts on a further clamping plate 20 .

After the stator core 6 is manufactured, the winding coils are inserted, and one U-shaped tooth laminate 10 is attached to the stator core 6 between each of these coils. .

Subsequently, the U-shaped tooth plate 10 is fastened to the stator core 6.

Furthermore, the free leg ends of each two-tooth lamination plate 10 are screwed to a fixed eyelet plate 21, which has a lockable central crimp screw 22.

The crimping screw 22 crimps a base 24 with a U-shaped cross section,
Its lateral legs form a tooth row 23, which teeth are supported on another crimp plate 20, through which the annular winding coil 9 passes through a groove 25. There is.

The stator 1 is fixed to the vehicle by a fixed liquid eye plate 21 (not shown in FIG. 1).

The outer lamina 26 of each tooth laminate 10 is constructed thicker than the other lamellas and is bent towards the adjacent groove at the tooth head, so that the clearance chain 27 inserted into the groove
is maintained, and the protrusion of the winding coil to the outside can be reliably avoided (see FIG. 2).

As is clear from FIG. 1, sharp edges at the transition between the base leg and the side leg of each lamina 10 are avoided to come into contact with the components of the reaction section 2, and these corners A rounded edge R is provided to reduce the non-uniformity of the magnetic field in the area and thereby keep the losses low.

The coating of the reaction part 2 as a U-shaped rail 30 as reaction rail 4 takes place over the inner surface of this rail, ie in such a way that it reaches at the end face 1 of the free end of the side leg of the rail 3.

According to FIGS. 1 and 2, therefore, the horizontal forces between the stator 1 and the reaction part 2, which are caused by peripheral effects and can also lead to disturbance effects, are eliminated and at least The goal is to reduce it.

FIG. 4 shows a linear motor 28 according to the invention for driving a magnetically suspended and guided floating vehicle 29.

One stator 1 is attached to each of the longitudinal arms of the floating vehicle 290 using a fixed liquid eye plate 21, and the reaction part 2 is fixed to the track member 30.

The U-shaped cross-section rail 3' serves at the same time as a support and guide rotor rail for a support and guide magnet array 31 provided below the stator 1 in the hand direction of the floating vehicle.

For this purpose, the outer periphery of the lower lateral legs 32 of each rail 3' is constructed with downwardly projecting webs 33, whose end faces as downwardly directed pole faces support and guide magnets 3.
It opposes the magnetic pole face of No. 1 at an interval.

This distance is measured by a sensor (not shown) and is kept constant by controlling the excitation of the support and guide magnet 31, so that the working stator outer surface and the associated reaction layer 4
The air gap 5 between the two (see FIG. 1) is also constant.

In FIG. 4, each successive row of support and guide magnets 31 is arranged alternately offset to the right and to the left.

By separately controlling the excitation of the magnets displaced to the right and to the left, horizontal forces can be applied to the floating vehicle 29, so that lateral displacement of the vehicle is prevented even without special guidance systems. I can do it.

Opposite to the moving magnetic field generated by each stator 1, which passes through the associated rail 3' in the longitudinal direction of the rail, the supporting and guiding field of the supporting and guiding magnet 31 is located at the bottom of the respective rail 3'. It runs in the lateral direction of the rail on the side legs 32.

On the other hand, the additional webs 33 can increase the rigidity of the rail 3' and further increase the distance between the rail fixing part and the track member.

Thereby, the U-shaped cross-section rail 3' is optimally used not only magnetically but also mechanically.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of an induction motor according to the present invention, FIG. 2 is a longitudinal cross-sectional view of the induction motor taken along line ■-■ in FIG.
FIG. 3 shows a sectional view of the 5-inch stator core of FIG. 1, and FIG. 4 shows a schematic cross-sectional view of an induction motor according to the invention for driving an electromagnetically suspended and guided floating vehicle. . 1...Stator, 2...Reaction part, 3.
...Rail, 4...Reaction rail, 5.
...Gap, 6...Stator core, 7...
... Main core laminate, 8... End core laminate,
9...Winding coil, 10...Tooth bottom layer plate, 17...Connecting rod, 20...Crimp plate, 30... Track members.

Claims (1)

[Scope of utility model registration request] It has a multi-phase stator with an annular winding entering the groove on three sides and a reaction section consisting of a rail of ferromagnetic material of U-shaped cross section surrounding the stator on three sides, the interior of this ferromagnetic material being In a linear induction motor whose surface is covered with a conductive layer as a reaction rail, the stator 1 has a stator core 6 divided in the longitudinal direction and has two core laminations 7 and 8 with lamination directions perpendicular to each other. the core laminate 7.8 is configured without grooves and is provided with a U-shaped root lamina plate 10 which is placed on three sides on the stator core 6 as a stator tooth; The direction of lamination of the tooth root plate body 10 is the same as that of the two core laminated bodies 7,
A linear induction motor configured to be perpendicular to each of eight stratification directions.