JPH0526425B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a linear armature coil as a traveling magnetic field medium of a linear motor.

[Background Art] In recent years, a wide variety of linear motors have been put into practical use in fields ranging from the electronics field to the railway field. This linear motor intermittently generates a traveling magnetic field of a predetermined frequency in a linear armature coil as a traveling magnetic field medium, and creates a prescribed thrust or reaction force between magnetic field generators (magnets) interlinked with this traveling magnetic field. Needless to say, it is based on Fleming's law.

The prior art of the present invention is the previously proposed Japanese Patent Application No. 116945/1983 (Japanese Patent Application Laid-open No. 291655/1999).
There is. The content of this prior invention is roughly as follows.

In other words, a pair of spectacle-shaped composite armature coils made by spirally winding an insulated conductor are wired and connected for each pair to form a composite armature coil array for one phase. A traveling magnetic field medium is created by integrating the overlapping armature coil arrays, which are stacked and arranged in a stacked manner shifted in the row direction by the corresponding number of rows so as to have a predetermined electrical phase difference, through an interphase insulating layer, etc. , which constitutes the linear motor armature coil.

[Problems to be Solved by the Invention] In the prior invention of Japanese Patent Application No. 116945/1983 (Japanese Unexamined Patent Publication No. 291655/1999), there were the following problems that still need to be solved.

(1) The eyeglass-shaped coil, which is the constituent unit of the linear motor armature coil, is made by bending a predetermined number of insulated conductors into a predetermined shape and winding them, but the forming process of bending and winding them into the predetermined shape is difficult. It is.

(2) Depending on the structure of the linear motor armature coil, it may be difficult to arrange the spectacle-shaped armature coil units correctly one coil pitch apart, and in particular, it may not be possible to bend the longitudinal sides of the coils at right angles. The forming process of connecting the eyeglass-shaped armature coil units to form an armature coil array of a predetermined shape is also difficult.

(3) The linear motor electric motor is manufactured by accurately shifting the multiple rows of armature coil rows shown in (1) and (2) above in the row direction so as to have an electrical phase difference corresponding to the number of rows over the entire length. It is extremely difficult to mold one piece as a child coil.

(4) Since each coil unit is spirally bent and wound in the same plane, curved parts that are not perpendicular to the four corners are inevitably created, and when viewed as a traveling magnetic field medium, the effective length of the coil side where the traveling magnetic field is generated is It is smaller compared to the coil dimensions, and in order to generate a traveling magnetic field equivalent to a right-angled coil, larger coil dimensions, or in other words, more conductor usage, are required.

(5) Due to the structural and manufacturing constraints that a pair of spectacle-shaped armature coils serve as a structural unit, and each coil unit is wired and connected to form one composite armature coil array phase, A linear motor armature coil is configured by a band-shaped linear coil unit that does not substantially include a curved part in the coil element and does not require intermediate wire connection.
cannot be manufactured.

The present invention attempts to solve the above problems.

[Means for solving the problem] In the linear motor armature coil according to the present invention,
In order to achieve the above-mentioned problem, an odd number of at least three or more band-shaped linear coil units of a required length consisting of a rectangular wave-wound coil array of a predetermined pitch are alternately superimposed with the phases of the rectangular waves reversed. , by connecting the ends of two adjacent linear coil units alternately at both ends of this stack, one phase of each linear coil unit is electrically connected in series in the entire stack. A laminated linear coil array is constructed by stacking a plurality of phases of the laminated linear coil array with the pitch in the length direction shifted so as to have an electrical phase difference corresponding to the number of phases.

[Function] In the linear motor armature coil of the present invention, since the band-shaped linear coil unit consists of a rectangular wave-shaped wave-wound coil array, there is no need to wind the conductor, and therefore the linear motor armature coil of the present invention does not require winding of the conductor. Coil rows can be formed, and long strip-shaped linear coil units with the same size and shape and fixed pitch can be easily created. If an odd number of three or more coils are stacked and the end connections of adjacent coil units of the stack are performed alternately at both ends, the wave-wound coils corresponding to the number of stacked coils are electrically connected in series, A laminated linear coil array for one phase with uniform pitch over the entire length can be obtained. By creating a plurality of laminated linear coil arrays with the same overall length pitch in this way, and layering them with a predetermined phase difference, a linear motor armature coil of the following length can be obtained, and this can be further extended to a longer length. They can also be connected horizontally to make them longer.

Embodiments of the present invention will be described below with reference to the drawings.

[Example] FIG. 1 shows how strip-shaped linear coil units are stacked as basic constituent elements of a linear motor armature coil according to the present invention.

In FIG. 1, three band-shaped linear coil units t1, t2, and t3 are alternately stacked in opposite phases.
Each band-shaped linear coil unit consists of a series of continuous rectangular wave-shaped wave-wound coils with no wire connections or connections in the middle. The insulated conductor has a flat cross-sectional shape formed to have alternating openings, and although theoretically it can have an infinite length, it is shown as having a finite length for convenience of explanation. Band-shaped linear coil units t1, t2, t with no wire connections in the middle
3 is an odd number of 3 or more wires stacked so that their rectangular waveforms are alternately in opposite phases as shown in FIG.
At the right end of the figure, t1 and t2 that are adjacent to each other are connected end to end, and at the left end, t2 and t3 that are adjacent to each other are connected end to end, and the three-layer coil units are electrically connected in series, so that they are in phase with each other as shown in FIG. A laminated linear coil array A is formed. FIG. 2 is a top view of the laminated linear coil array A, and FIG. 3 is a side view. Each coil unit t1, t2,
Both ends of the series connection body of t3 are laminated linear coil array A
Connecting terminals A1 and A2 appear at both ends of the terminal. The flow of current when a direct current is passed through the laminated linear coil array for one phase is as shown in FIG. It can be seen that a magnetic field whose polarity alternates alternately along the flow direction is generated on the vertical side of the coil. In FIG. 4, a is the return wire, and a1 and a2 are its both terminals.

A laminated linear coil array B (for one phase) having exactly the same structure as the aforementioned laminated linear coil array A is formed,
Similarly, it is combined with the retrace line b.

In order to make a linear motor armature coil which is a traveling magnetic field medium, at least two coils A and B are required as shown in Fig.
Needless to say, a multilayer linear core coil array is required. FIG. 5 shows a linear motor armature coil in which these two-phase laminated linear coil arrays A and B are stacked with a half-pitch shift, as seen from the top. In this case, the following laminated linear coil arrays A and B
The retrace lines a and b attached to are also combined together, and the sixth
It is configured as a unit as shown in the figure. Each individual unit has a length l, and therefore, when a plurality of units are connected longitudinally and electrically wired, a long linear motor armature coil is formed.

In order to configure a linear motor armature coil with a desired number of phases, the laminated linear coil arrays are arranged so as to be shifted from each other in the column direction by the number of phases so as to have an electrical phase difference corresponding to the desired number of phases. good.

In addition, the band-shaped linear coil unit itself may be a single conductor or a double conductor, and in the case of a double conductor, multiple conductors are connected within the plane of the wave-wound coil in order to facilitate joining with adjacent coils at the ends of the coil. It is best to use them in parallel to form a coil.

The present invention involves cutting a theoretically infinite length flat insulator wave-wound coil into predetermined lengths, stacking an odd number of three or more coils, and alternating the ends of the two coils that are in contact with each other with electricity at either the right end or the left end. By connecting the coils in series to form a series coil, it is possible to manufacture coils of any desired length.

In addition, in the above, the first
For example, if one side of the right end of the coil unit in the next layer is connected to the right end side of the second layer coil unit that is in contact with it in an electrical circuit, the coil unit in the next layer connects the left end side with it. It will be electrically connected to one side of the left end of the coil unit of the facing fourth layer.In short, in the end connection process of each band-shaped linear coil unit, the ends to be connected at the odd-numbered and even-numbered layers of the stack are the left and right sides. Take turns.

Since the band-shaped linear coil unit constituting the linear motor armature coil of the present invention can have a theoretically infinite length, it is manufactured from a flat band-shaped long insulated conductor strip by die-cutting rather than by bending or the like. It has the advantage of being able to be efficiently constructed from materials with no internal distortion produced by continuous casting/rolling, continuous fusing, cutting/continuous electrolysis, punching, or other methods.

FIG. 7 shows a simplified example of the connection between phases of a plurality of phases of linear motor armature coils cut into desired lengths as described above.

In Fig. 7, on the A phase side, the output terminal _A2 of the first linear motor armature coil is connected to the input terminal A3 of the linear motor armature coil on the right side in the figure, and the output terminal _A4 is further connected to the input terminal _A3 of the linear motor armature coil on the right side in the figure. Connect to the input end of the linear motor armature coil on the right side, connect a predetermined number of wires one after another in this way, and connect the A-phase return wire a to the output end A _o (right end) of the last linear motor armature coil.
Connect.

For the B phase, connect the input and output terminals B ₂ , B ₃ , B ₄ , B ₅ ... between adjacent coils in the same way as for the A phase, and connect the last output terminal B _o (right end) of the B phase coil. Connect the B-phase return wire b. Furthermore, the input terminals of the A and B phases and the terminals of the retrace lines a and b are connected to each input/output terminal of the DC power inverter (phase current switching device) INV, and the conducting phases of the inverter are controlled according to a predetermined control procedure. The coil is commutated to generate a traveling magnetic field intermittently at a predetermined frequency in the length direction of the coil. This armature coil has an 8th
As schematically shown in the figure, by making the magnetic flux correspond to a magnet M and interlinking the magnetic flux with the traveling magnetic field of a traveling magnetic field medium, that is, a linear motor armature coil, thrust or reaction force can be generated intermittently.

[Effects of the Invention] As described above, according to the present invention, the band-shaped linear coil unit as a component of the linear motor armature coil is composed of a rectangular wave-shaped wave-wound coil array, so winding of the conductor is unnecessary. Therefore, it is possible to form a right-angled rectangular wave-like coil array in the same plane without including a curved bending component, and it is possible to easily create a long band-shaped linear coil unit of a constant pitch and having the same size and shape. By simply stacking an odd number of 3 or more coils and alternately connecting the ends of adjacent coil units of the stack at both ends, the rectangular wave coils corresponding to the number of stacked coils can be electrically connected in series. , it is possible to obtain a laminated linear coil array for one phase with uniform pitch over the entire length. In this way, a linear motor armature coil of the required length can be obtained by simply creating a plurality of stacked linear coil arrays with the same overall length pitch and layering them with a predetermined phase difference. They can also be connected horizontally to make them longer.

Therefore, effective use of the coil dimensions can be achieved in terms of dimensional stability, ease of manufacture, and magnetic field generation efficiency, and a long coil with fewer intermediate connecting parts can be realized.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing how strip linear coils are stacked as constituent elements of a linear motor armature coil according to an embodiment of the present invention, and FIG. 2 is a top view showing an example of a stacked linear coil array. , Fig. 3 is a side view, Fig. 4 is a schematic diagram showing the direction of current flow in a coil array for one phase, Fig. 5 is a top view of a two-phase linear motor armature coil, and Fig. 6 is a side view. FIG. 7 is a simplified circuit diagram showing an example of electrical connection, and FIG. 8 is a schematic front view showing the general configuration of the linear motor. (Explanation of symbols of main parts), t1, t2, t
3: Band-shaped linear coil unit, A, B: Laminated linear coil array, a, b: Return line, INV: DC power inverter.

Claims (1)

[Claims] 1. At least three or more odd number strip linear coil units of a required length consisting of rectangular wave-wound coil arrays of a predetermined pitch are alternately superimposed with the phases of the rectangular waves reversed, and at both ends of this superposition. An example of a laminated linear coil for one phase is constructed by alternately connecting the ends of two adjacent linear coil units to each other and electrically connecting each linear coil unit in series in the entire stack. A linear motor armature coil in which multiple phases of a stacked linear coil array are stacked with mutually shifted pitches in the length direction so as to have an electrical phase difference corresponding to the number of phases.