JP2000184684A - Linear motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently produce coil winding in a linear motor, to prevent the reduction in the space factor due to winding irregularity of the coil winding, and to improve the quality of the coil winding. SOLUTION: A plurality of bobbin-type coil winding 17 where the coil winding of each phase in three-phase coil winding is wound to a bobbin is fitted among a plurality of slots 16 of a primary-side core 11 where a plurality of comb-like teeth 15 and the slots 16 are alternately formed. As a means for adjusting the bobbin-type coil winding 17 of each phase so that electromagnetic balancing is made in each slot, the bobbin-type coil winding 17 of each phase in three- phase winding is divided into two groups for storing so that a first group with a deep part to the depth wise direction of the slot 16 becomes symmetrical to a second group with a shallow one. The bobbin-type coil winding 17 of the first group and that of the second one are connected in series for forming a circuit. The bobbin-type coil winding 17 of the same phase in the same group is flatly stored into the slot 16 at the same height without mutually overlapping.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motor using a bobbin.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional flat linear motor, in which three-phase windings 4U, 4V, 4W are provided between a plurality of slots 3 formed between a plurality of teeth 2 of a primary iron core 1. Are mounted directly, and the secondary-side conductor 5 is opposed to the teeth 2 of the primary-side iron core 1. The moving magnetic field generated by energizing the three-phase windings 4U, 4V, and 4W causes the primary iron core 1 or the secondary conductor 5 to move relatively.

In this conventional plate-shaped linear motor, the three-phase windings 4U, 4V, and 4W are directly accommodated in the slot 3 of the primary iron core 1 obliquely.

[0004]

The flat linear motor in which the windings 4U, 4V and 4W are directly accommodated in the slots 3 of the primary side iron core 1 cannot be wound by using an automatic winding machine because the windings cannot be aligned and wound. Poor work efficiency in line work.

[0005] Furthermore, since the windings cannot be aligned and wound, the windings 4U, 4
Uneven winding is created in the arrangement of the conductors at V and 4W, and this uneven winding causes a decrease in the space factor of the windings 4U, 4V and 4W, and as a result, the thrust decreases. Current must be passed through windings 4U, 4V, 4W.

In addition, since the windings 4U, 4V, 4W are in direct contact with the primary iron core 1, there is a concern that the quality of the windings 4U, 4V, 4W may be degraded, such as damage to the conductor coating.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and aims at improving the efficiency of winding production in a linear motor, preventing a decrease in space factor due to uneven winding of a winding, and improving the quality of a winding. It is intended for.

[0008]

According to the first aspect of the present invention, there is provided an iron core having a plurality of teeth and a slot formed between the teeth, and a plurality of cores fitted between the plurality of slots of the iron core. This is a linear motor including a bobbin type winding in which a winding is wound around a bobbin.

[0009] With this arrangement, the bobbin type winding in which the conductor is wound around the bobbin by an automatic winding machine or the like is placed in the slot of the iron core, thereby improving the efficiency of winding production and the space factor due to the uneven winding of the winding. To prevent the deterioration of the winding and improve the quality of the winding.

According to a second aspect of the present invention, in the linear motor according to the first aspect, the bobbin winding is a three-phase winding, and the bobbin winding of each phase in the three-phase winding is connected to each slot. And an adjusting means adjusted so as to obtain an electromagnetic balance.

With this arrangement, even when the bobbin windings of each phase of the three-phase winding are stored in the shallow portion and the deep portion of the slot of the iron core, respectively, the electromagnetic means of the bobbin windings of each phase are adjusted by the adjusting means. A balance is maintained so that there is no difference in the current value or voltage value flowing through the bobbin windings of each phase, and power is supplied to the bobbin windings of each phase under the same conditions.

According to a third aspect of the present invention, in the linear motor according to the second aspect, the adjusting means is such that the bobbin type winding of each phase in the three-phase winding is deeper and shallower in the depth direction of the slot. The first group of bobbin type windings and the second group are stored separately in two groups so that
The bobbin windings of the group are connected in series to form a circuit.

Thus, the electromagnetic imbalance of the bobbin type windings between the respective phases of the first group is corrected by the bobbin type windings of the respective phases of the second group, and electromagnetically balanced from the winding arrangement. To eliminate the difference in the current value or voltage value flowing through the bobbin windings of each phase, and supply power to all the bobbin windings of each slot under the same conditions.

According to a fourth aspect of the present invention, in the linear motor according to the third aspect, the bobbin type windings of the same phase in the same group are stored in the slots at the same height and without overlapping each other. It was done.

[0015] Thereby, the bobbin type windings of the same phase in the same group of three-phase windings are easily fitted in the slot without being inclined.

According to a fifth aspect of the present invention, in the linear motor according to the second aspect, the adjustment means electromagnetically balances the impedance difference due to the difference in the inductance of the bobbin winding between the three-phase windings. This is an impedance adjusting means adjusted so as to obtain the following.

By adjusting the impedance of the bobbin winding between the phases in advance, the electromagnetic imbalance of the bobbin winding between the phases is corrected.

According to a sixth aspect of the present invention, in the linear motor according to the fifth aspect, a bobbin type winding having the same phase comprises:
They are stored in the slot at the same height without being overlapped with each other.

Thus, the bobbin winding is easily fitted in the slot.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the embodiments shown in FIGS.

FIGS. 1 and 2 show an embodiment of a flat plate linear motor using three-phase windings, in which a secondary conductor 12 is relatively movable with respect to a primary iron core 11 as an iron core. It is provided in. The secondary conductor 12 has a nonmagnetic conductor plate 13 facing the primary iron core 11 and a magnetic conductor plate 14 on the opposite side.

The primary iron core 11 has a plurality of comb-shaped teeth 15 and a plurality of slots 16 formed between the teeth 15, and a three-phase three-phase between the plurality of slots 16 of the primary iron core 11. A bobbin type winding 17 is fitted.

The three-phase bobbin type winding 17 has a first group of U-phase windings 17U1 from the bottom in the slot 16 toward the opening,
A first group V-phase winding 17V1, a first group W-phase winding 17W1, a second group W-phase winding 17W2, a second group V-phase winding 17V2,
The group U-phase windings 17U2 are sequentially stored in multiple stages.

As shown in FIG. 2, these bobbin-type windings 17 are each provided with a conductive wire 23 wound in a concave groove 22 of each bobbin 21, and an insulating material such as an insulating tape is provided on the outer peripheral surface of the conductive wire 23.
Is an exterior.

The bobbin 21 is made of an insulating material such as a synthetic resin, and mechanically increases the strength of the conductive wire 23.

The operation procedure is as follows.
Is wound around the bobbin 21 in an aligned winding by an automatic winding machine or the like to form a bobbin type winding 17, and the bobbin type winding 17 is fitted between the slots 16 of the primary iron core 11. In this way, by placing the bobbin-type winding 17 in which the conductor 23 is aligned and wound on the bobbin 21 by an automatic winding machine or the like in the slot 16 of the primary-side iron core 11,
To improve the efficiency of winding production, prevent the space factor from decreasing due to uneven winding of the conductive wire 23, and improve the quality of the winding.

The mounting structure of the bobbin type winding 17 to the primary side iron core 11 is the same as the bobbin type winding of the first group or the second group.
17 are stored in the slot 16 flat at the same height without overlapping each other.

That is, the bobbin type windings of the same phase in the same group are, for example, three U-phase windings 17U1 of the first group,
These windings do not share a part of the straddling teeth 15 with each other, and one side of these windings is not stored together in the same slot 16. Thereby, the bobbin type windings 17 of the same phase in the same group of three-phase windings can be easily fitted in the slot 16 without being inclined.

On the other hand, in the same-phase winding of the three-phase winding,
If a part of the straddling teeth 15 is shared with each other, or one side of each winding side shares the same slot, the slot
Since the windings must be accommodated diagonally in 16, it is impossible to accommodate the bobbin type winding 17 reinforced with the bobbin 21 in the slot 16, but as in this embodiment, the three-phase winding Bobbin type windings of the same phase in the same group are always stored at the same position with respect to the height direction of the iron core teeth, and are stored flat at the same height position without overlapping each other, The bobbin type winding 17 can be easily housed in the slot 16 without the above-mentioned inconvenience.

The first group U-phase winding 17U1, the V-phase winding 17V1, and the W-phase winding 17W1 and the second group W-phase winding 17W2,
The two-group structure of the V-phase winding 17V2 and the U-phase winding 17U2 includes adjusting means for adjusting the bobbin type windings 17 of each phase in the three-phase winding so as to be electromagnetically balanced in each slot 16. Has become.

That is, this adjusting means is that the bobbin type winding 17 of each phase in the three-phase winding is
Symmetrically between the deep part and the shallow part with respect to the depth direction of 16,
That is, they are arranged and stored in two groups, each being vertically symmetrical with respect to the height direction of the teeth of the primary side iron core 11, and further, the U-phase winding 17U1, the V-phase winding 17V1, and the W-phase winding of the first group. 17W1
And the second group W-phase winding 17W2, V-phase winding 17V2 and U-phase winding 17U2 are connected in series with each other to form a circuit.

As a result, the electromagnetic imbalance between the first group of the U-phase winding 17U1, the V-phase winding 17V1, and the W-phase winding 17W1, the second group of the W-phase winding 17W2, and the V-phase winding 17V2, U-phase winding 17
By mutually compensating the electromagnetic imbalance between U2 and each other, electromagnetically balancing from the winding arrangement, eliminating the difference in the current value or voltage value flowing through the bobbin type winding 17 of each phase, Power is supplied to all the bobbin type windings 17 of the slot 16 under the same conditions.

That is, the inductance of the bobbin type winding 17 decreases as the slot 16 of the primary iron core 11 is shallower, and the inductance increases as the slot 16 is deeper. The windings 17 are arranged to balance the electromagnetic of the bobbin windings 17 of each phase as a whole of the first and second groups, and to supply power to the bobbin windings 17 of each phase under the same conditions. I do.

On the other hand, in the same phase winding of the three-phase winding,
In the case of a linear motor that avoids sharing the teeth and slots of the iron core, and only one group of windings under exactly the same conditions is stored in the slot 16, the windings of each phase are formed according to the tips or roots, respectively. Will be stored in the slot
Since the permeability of the iron core and the resistance value of the winding current change depending on the depth of 16, the phases of each phase cannot be electromagnetically balanced, so that a difference occurs in the current value or voltage value flowing in the winding of each phase, Although sufficient power cannot be supplied to all windings under the same conditions, as in this embodiment, the bobbin type winding 17 of each phase in the three-phase winding is deeper in the depth direction of the slot 16. The first group of bobbin type windings 17 and the second group of bobbin type windings 17 which are divided into two groups are stored in the slots 16 in reverse so as to be symmetrically arranged in the portion and the shallow portion. 1
Since the bobbin windings 17 of the group and the bobbin windings 17 of the second group are connected in series to form a circuit, a uniform electric resistance value is obtained with the bobbin windings 17 in all the slots, and the same Sufficient power can be supplied under the conditions.

FIG. 3 shows another embodiment of the flat plate linear motor using three-phase windings. The three-phase bobbin type windings 17 are stored in slots 16 in two groups and are symmetrically stored. The three-phase windings 17U, V-phase winding 17V, and W-phase winding 17W of the three-phase winding are adjusted by three-phase windings so as to be electromagnetically balanced in each slot 16. It is provided with impedance adjusting means for adjusting the difference in impedance between the phases of the windings due to the difference in the inductance of the bobbin type winding 17 so as to be electromagnetically balanced in each slot 16.

The impedance adjusting means includes, for example,
As the slot 16 becomes shallower, the number of windings of the bobbin type winding 17 is increased, or a coil or a resistor as an impedance element is added to the bobbin type winding 17, so that the bobbin between each phase is electromagnetically balanced. The impedance of the winding 17 is adjusted in advance to correct the electromagnetic imbalance of the bobbin winding 17 between the phases.

The U-phase winding 17U, the V-phase winding 17V or the W-phase winding 17W is formed in the slot 16 at the same height without the bobbin windings of the same phase overlapping each other. This allows the bobbin type windings 17 of the same phase of the three-phase windings to be easily fitted in the slots 16 without making them oblique.

The primary iron core 11 is not limited to a comb tooth shape. For example, the primary iron core 11 may have teeth and slots formed obliquely with respect to the bottom plate of the primary iron core 11.

[0039]

According to the first aspect of the present invention, by using a bobbin type winding for the linear motor, the winding can be aligned and wound on the bobbin by the automatic winding machine even in the production of the linear motor. The efficiency of production and the space factor of windings can be improved, and the quality of windings and mechanical strength can be improved by bobbins.

According to the second aspect of the present invention, the electric power is supplied to the bobbin type windings of each phase under the same conditions by balancing the electromagnetic between the bobbin type windings of each phase by the adjusting means. As a result, a smooth operation of the bobbin type linear motor can be ensured.

According to the third aspect of the present invention, the electromagnetic imbalance of the bobbin type winding between the phases of the first group is adjusted to the second phase.
Correct by the bobbin windings of each phase of the group, balance electromagnetically from the winding arrangement, eliminate the difference in current value or voltage value flowing through the bobbin windings of each phase, remove all the Power can be supplied to the bobbin winding under the same conditions. In addition, the electromagnetic balance can be obtained by using only the bobbin type windings under exactly the same conditions.

According to the fourth aspect of the present invention, the bobbin windings of the same phase in the same group are stored flat in the slot at the same height without overlapping each other. It can be easily fitted inside.

According to the fifth aspect of the present invention, the impedance adjustment means adjusts in advance the difference in impedance due to the difference in the inductance of the bobbin winding between the three phases of the three-phase winding, thereby providing a two-group winding. Even if it is not a line, it is possible to correct the electromagnetic imbalance of the bobbin winding between the phases.

According to the sixth aspect of the present invention, the bobbin type windings of the same phase are stored flat in the slot at the same height without overlapping each other. Can be fitted to

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a linear motor according to the present invention.

FIG. 2 is a sectional view showing a bobbin type winding in the linear motor.

FIG. 3 is a perspective view showing another embodiment of the linear motor according to the present invention.

FIG. 4 is a perspective view showing a conventional linear motor.

[Explanation of symbols]

 11 Primary iron core 15 teeth 16 slots 17 bobbin winding 21 bobbin

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Koji Saito 1-19-143 Higashi-Oizumi, Nerima-ku, Tokyo Inside the Tamura Corporation (72) Inventor Kazuhiko Takahashi 1-19-143, Higashi-Oizumi, Nerima-ku, Tokyo F-term (reference) in Tamura Corporation 5H641 BB07 BB18 BB19 GG02 GG03 GG04 GG08 GG11 GG12 HH08 HH10 HH13 HH14

Claims (6)

[Claims] An iron core having a plurality of teeth and slots formed between the teeth, and a bobbin-type winding fitted between the plurality of slots of the iron core and wound on a plurality of bobbins, respectively. And a linear motor comprising: 2. The bobbin type winding is a three-phase winding, and is provided with adjusting means for adjusting the bobbin type winding of each phase in the three-phase winding so as to be electromagnetically balanced in each slot. The linear motor according to claim 1, wherein: 3. The adjusting means is divided into two groups so that the bobbin windings of each phase in the three-phase windings are arranged symmetrically at a deep portion and a shallow portion with respect to the depth direction of the slot. 3. The circuit of claim 2, wherein the first group of bobbin windings and the second group of bobbin windings are connected in series to form a circuit.
The linear motor as described. 4. The linear motor according to claim 3, wherein the bobbin-type windings of the same phase in the same group are stored in the slots at the same height without overlapping each other. 5. The adjusting means is an impedance adjusting means for adjusting a difference in impedance due to a difference in inductance of the bobbin winding between each phase of the three-phase winding so as to be electromagnetically balanced. The linear motor according to claim 2. 6. The linear motor according to claim 5, wherein the bobbin type windings of the same phase are stored in the slots at the same height without being overlapped with each other.