JPS5829363A - stepping motor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stepping motor, and relates to a structure in which coils are wound around a bobbin around four poles formed on a stator 1a of a square-shaped Heblitz IIIy# stepping motor.

Conventional permanent magnet hybrid type angle stepping motors often have a step angle of t8 or &6, but as shown in Figure 1, the core (
Six poles (2) are protruded from the inner peripheral edge of the core (1) at symmetrical positions, and a coil is wound around each pole (2). If it is made into a square shape, there will be a non-functional part (3) at each corner sK cocoa, and in order to make the pole (2) on the a side protrude, there will be a slit on the inner periphery of the core for winding the coil between the poles (2). The area is smaller, and since the pole (2) faces the center of the core (1), the slit part (4
11 (
5) It is difficult to attach the coil to the pot pole (2), and the workability is poor.

This would only increase costs (I was reluctant to increase the production quantity).

Therefore, as shown in Figure 2, each side (7) of the square core (6)
) from the inner edge (8) of each pole (9).

A configuration can be considered to widen the gap between each pole (9) to make it easier to wind the coil, but each pole (91 is for each side)
If the inner side (8) of the rotor is not formed symmetrically, and a coil (1 o'clock) is wound around each pole, a wasted space will be formed, and the rotor's lll1 corresponding to the step angle will be
When l is an odd number, 411K, this tendency is more severe, and the disadvantage is that the amount of one coil per core is small, the electrical load is small, and the torque is also small.

In addition, the conventional method was to wind a coil conductor coated with a 57 (o pole (Q) K) into a ring and fit it into the pole (9). It has a structure in which the coil conductor is wound, and has the drawback that the workability of installing the coil is poor.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a stepping motor that maximizes the coils and provides the most efficient mechanical output of a stepping motor of the same size.

The structure of the present invention includes a substantially square rod-shaped rectangular stator core with poles protruding from the center of the inner edge of each side, each having a plurality of convex portions at the tips corresponding to the step angle; Four coils are wound around bobbins arranged along the inner edge, and a JII pattern is arranged in a space surrounded by each fill according to the step angle corresponding to the convex part of the pole. The rotor is provided with a rotor having a convex shape, and the height of the pole is set to 0.24 to 0.5 degrees of the outer diameter of the rotor.

Next, an embodiment of the present invention will be described with reference to a four-phase stepping motor having a step angle θ of 3″ 3π and having convex portions formed around the rotor at 28 side spacing.

- is a laminated or integrated stator core, which is formed into a substantially square bar shape, each side r2noυ3D (approximately central part Kkt of the inner edge (2) of 2υ, water (2)Q).
4 (To) (To) is placed in the center. Each of these poles @Q4
@Horizontal height Sμ) is Q, 2 of the outer diameter of the rotor (goods) 0, which will be described later.
4 to 0.5 times, and four tooth-shaped protrusions are formed on the tip edge of this pole.

It is evenly formed so that it looks like this. Also, the two trees on the left and right.
The ru (2) and the pole (to) of 1 ink are each ’5 a (turn).
Vertical center line of <4. -i, ), four convex portions @@OI (goods) are formed symmetrically, and these convex portions @@OI are formed by steps from the horizontal center line (j, -j, ) of the core (7). The one closest to the pole (to) side of spear 1 by an angle θ′″ is #k11th place.

It is formed as follows. Also, the pole (to) of Sai 4, which is opposite to the pole (to) of Sai 1, has four convex parts @ @ C3l
31 is the step angle #002 times the angle 2θ0 from the center line (), -j, ) in the direction perpendicular to -60 balls (to)
A sea bream is placed on the side. And each of these poles (to) (to)
(C) On the convex part of (4)) @ (to) 0ρ is formed toward the center of core 4, and is the pole of Sai2 which is ranked 4111th? 4 and jP60 pole (c), and the +i pole (to) side of the 20" equipped 4 pole (to), cut the part shown by the chain line in the off-line diagram. The concave part (to) forming this convex part (B1) is parallel to the center line (j, -1,) (j, -1,) from the chain line position to the pole Q
It is offset toward the center in the width direction of 4@ (to).

The next k (to) G41 @ (to) is a bobbin wound with a fill (b), and each of the poles (to) (to) (goods) 2 of A4 above.
! 9@ is fitted and installed, so it is 5. This spear 1 and the pole G3 (to) of K are attached to the bobbin (to)
(to) K is the pie 7 airer winding k, the m phase, i phase coil (2) is wound, and the 2nd and 1 black pole @ (c) K
The bobbin (to) to be attached is wound with pie filer winding K and B-phase and i-phase fills (b).

Each bobbin (to) (b) cl! 19 (to) thickness (-
) is the distance between the vertical line perpendicular to the central pole of the pole from the tip of the pole and the adjacent side edge of the pole adjacent to this pole. For example, the vertical line from the tip of the wooden pole of spear 2. The distance from the side line (to) of the pole (goods) of the second pole (to) of the pole (to) of the second pole (to) of the pole (to) of the first pole (to) of the second pole (to) which is adjacent to the pole (to) of the bobbin (to) (to) is approximately the same. The width (0) is calculated from the distance (j) between the inner edges of each side of the core wire (QI) to the bobbin c3.
304) (to) (to) The value obtained by subtracting twice the thickness (a) of (to) should be equal to fi [.

Also, the width (o) of each bobbin (to) is the distance between the tip edges of the opposing wood rods, for example, the pole (c) of 1-2 and the pole (to) of 6 Make it approximately equal to the distance (-) between the leading edges.

In other words, the distance between the opposing inner edges (2) of the core (to) is calculated by subtracting the sum of the heights (h) of the opposing poles from the distance 111 (j) between the opposing inner edges (2), for example, from the distance between the edges (2). The distance between the pole 1 (to) and the pole 1-4 is approximately equal to the distance (-) minus the height 2A), and each bobbin (to) (b) 0! The thickness (α) of ecIl is thinner than the rotor (outside 11Q) of the rotor (b), which will be described later, and the thickness of the pole (to) c! It may be formed thinner than the height of 4@H.

Next, the rotor (goods) is connected to each of the poles 23(2)c! 9
(to) K-wound coil (to) Ki! The rotor is disposed in a space (to) surrounded by a magnet, and the rotor is formed of a disc-shaped magnetic body @1) placed between a disc-shaped permanent magnet (A), and this magnetic 28 protrusions are formed at equal intervals between the outer periphery of the body (b), and the upper and lower magnetic bodies (4 buls)
The convex part - is one half of the convex IIn, that is, the step angle #0
It is made of steel with a 1/2 circumference square ceramic.

A bearing (c) is provided on the rotating shaft which is fixed through the center of the rotor.

Also, each bobbin (to) (to) (to) @ (to) upper side 11 has a bobbin (to) c! 4 (To) (To) The terminal pin to which the lead wire of the coil (B) is connected is inserted into the connection hole of the printed wiring board [@] to connect it.

Also, connect the terminal pin of the connector to this wiring board.

Also, each pole of the core (1) (to) (goods) (2!9(
To) K fitted bobbin (To) (B) cl! At least the diagonal position of 9 (to), for example, between the pole of 1st ink (to) and the pole of 2nd ink (c), and between the pole of 1st ink (to) and the pole of 4th ink, respectively, in a film-like manner. Removal prevention piece 6υ
Both ends are locked to prevent each bobbin 03(2) (to) from being pulled out.

Further, -0 is a motor frame, and this frame - (to) is adapted to be fitted to the upper and lower surfaces of the core (2).

Moreover, the bobbin a1 is attached to the inner surface of the lower motor 7 frame Q.
O4cmcm has a protruding retaining center that engages with the inner side of the tatami mat. Frame - In is also bobbin 03 (B) (To) (To) 11
A retainer is provided that protrudes to engage with and hold the bobbin gs@4@(to) in motion. These upper and lower 7 frames are tightened and fixed using bolts K that pass through the core.

The meeting is a shield plate formed on a magnetic material such as an iron plate,
It is formed into a substantially T-shape, and the output shaft portion (
The base ll1II@ which formed the insertion hole for inserting the base 1ull (to), the mourning piece S which was bent with ivy from the center of the vase of this base 1ull (to), and one center piece from each of these center pieces. The shield 11 (41) is made of an engaging piece 1Il-, which has been folded and folded apart from the other parts, and the base plate part (towards) of this shield 11 (41) is brought into contact with the outer surface of the lower frame (towards), and each protruding piece part is pressed up and down. Each outer circumference W of the frame
Each of the above poles @ (2) is attached to each outer peripheral surface of I and core (1).
(e) Engage with the engagement lll- formed corresponding to the position of (2), and insert the engagement piece into the engagement groove 1 formed on the outer surface of the upper surface of the upper frame acid, depending on the position of the connector. This is to prevent magnetic leakage due to magnetic flux 10, especially towards the output shaft group side, at the pole g3(to) and (a) portions.

Next, the operation of this embodiment will be explained.

First, when we excite the Mu phase of the coil 67) @ attached to the pole of spear 1 and the pole of spear 4, for example, the pole of spear 1 (c) becomes the south pole, and the pole of spear 4 becomes the south pole. becomes a pole, and the pole (c) K of the rotor (c) is attracted by the convex part of one of the magnetic bodies (41) of the rotor (c), and the pole CIII of the 4th
In K, the convex part (C) of the other magnetic body of the rotor (goods) is attracted, the step angle #"@1 turns, and then the pole of spear 2
and the coil attached to the Go pole @ (b) 3
When the phase is excited, the pole of spear 2 becomes the N pole, and 1
Sumi Po J Shikuto) becomes S pole and 1,1F2 Bo J &
The convex part of the other magnetic body (b) of the trochanter plow is attracted to (2), and the convex part of one magnetic body (convex 1g of 4a) of the rotor (goods) is attracted to the pole of 1 ink (to). The rotor (5) is attracted
11 rolls, then 1 spear (to) and 4-year-old Paul (
When one phase of coil 2) is excited, the pole (2) of pole 1 becomes the N pole, the pole (2) of pole 4 becomes the S pole, and the pole of pole 1 (to) becomes the rotor. The convex part (to) of the other magnetic body (01) of the rotor (goods) is attracted, and the convex part 11U of one magnetic body (01) of the rotor (goods) is attracted to the pole (to) of the spear 4, and the step angle is 06 Rotating, followed by two poles and one
When the i-phase of the coil @ (ro) of the black pole (to) is excited, the pole of spear 2 becomes the south pole, the wood of spear 6 becomes the north pole, and the pole of the spear 2 becomes the north pole ( The rotor (goods) is
The convex s- of one magnetic body (goods) is attracted, and the convex part of the other magnetic body (6) of the rotor (5) is attracted to the pole @ of the fang 6, and the rotor (5) is '', this operation is repeated, and the rotor (b) is rotated in steps.

The leakage magnetic flux concentrated at the output shaft part 67) of the rotating shaft due to the magnetic saturation occurring at each pole Q3I24) (to) is reduced by 1 leak due to the substrate group of the shield plate (to) and each protrusion 1161. Prevented.

Also, when assembling, attach the terminal pin protruding from each bobbin (to) 04CI@ to the printed wiring board M'II1. By inserting it into the connection hole - and making a soldering connection, the bobbin (To) (2) (To) (To) is held in position, and the wiring is easy, there is no risk of incorrect wiring, and the connection is Stop being unfaithful. Furthermore, by connecting this wiring board 47) K=g connector, the external conductor can be connected more reliably.

In addition, between adjacent poles located on the diagonal, for example, the side edges of pole 1 (to) and pole 2, and Il'/Ik between pole 6 (to) and pole 4, 4, are selected. By simply locking both ends of the sap stopper piece, each bobbin can be reliably fixed.

Furthermore, the retaining center of the flap fitted to the core is engaged with the inner surface of the bobbin @ (to), and the bobbin @
(To) (To) (To) is held in position.

In addition, among the poles (to) sewn of the core (2), the center is -0 or 2#0 sea bream-level @ (goods) @ (to) is a notch on the side edge of the convex IIaIm on the dominant side of the tip edge. From K, each pole r23 (good) (c)
Due to the asymmetrical arrangement of the coils, the space created when winding the coil can be reduced.

Next, the thickness (α) of each bobbin (to) (to) (to) (to) (to) - is determined by the vertical line from the tip of the opposing pole (c) Q4 @ (to) and the adjacent side edge of the pole adjacent to this pole. and the width of bobbin C33 (B) (To) (To).
The height Al of the pole when C) is made approximately equal to the value obtained by subtracting twice the thickness of the bobbin from the distance between the inner side green wire of each side Qυ of the core wire. The relationship with the outer diameter (■) of the rotor will be explained.

The distance (-) between the four inner sides of each opposing side Qυ of the core (sha) is 64 proverbs, and Paul (21 (goods) (c) (to)
Assuming that the ratio between the width of the rotor and the outer diameter of the rotor (0) is 0.45, the storage area of 1/2 of the coil stored between adjacent poles is as shown in the table below and Figure 8 (1). ) to aSVc.

In addition, the height of each pole @ @ (To) (E) is the core (To).
The distance (−
) to 1/2 of the difference between the outer diameter ◎ of the rotor (5), that is, mu-(34-D)÷2.

As a result, the bobbin storage area (#) is the height of the pole A)
It is clear that the maximum value is reached when the value is 0.5 times the outer diameter of the rotor. At this time, the motor has the largest electrical load among motors using cores (A) of the same size.

On the other hand, in order to maximize the torque obtained with a core of the same size, the bobbin storage area is proportional to the electrical load.
The outer diameter of the rotor (goods) should be determined so that the product of 1) and the rotor outer diameter 0, which is proportional to the magnetic loading, is maximized. 2) Outer diameter 0
Q, the sharpening torque of 24 times is the maximum.

In addition, in the above table, the ratio between the width of the pole (to) (goods) @- and the outer 11cm of the rotor (2) is Q, 4s, but this ratio is 0.
．． 5, (LaI3.(L4, Q, 6) as shown in the following table.

Therefore, in both cases, the bobbin storage area (I) is the maximum value of 11 (0.5 times D) outside the rotor (to) when the pole height is high, and the maximum value is when the pole height is at the rotor (b). 4th floor outside
! The torque is maximum when the bond is 124 (■).

Also, if the width of the bobbin (#) is approximately equal to the distance between the tip edges of opposing poles, and the thickness of the bobbin is made thinner than the outer diameter of the rotor and thinner than the height of the pole, the height of the pole is A. ) and the outer diameter of the rotor (0) are shown in the following table and Figure 9.

In this way, when the bobbin storage area (JPl is the pole height A) is 0.5 times the rotor outer diameter 0, the maximum value E
, the height of the wooden wheel hl is the outer diameter of the rotor ■
, the torque is maximum when it is 24 times.

Also, as shown in Fig. The distance between the pole in contact with the Kll and the adjacent II side is approximately equal, and the width of the bobbin @ (Ro) (To) (To) is determined from the distance of the inner edge opening of the Q powder on each side of the core (2). If the value is approximately equal to the value obtained by subtracting twice the thickness of bobbin-〇4@(to), two sets of bobbins on the second side are simultaneously assembled inside the core (2) and wound around each opposing pole. Can be equipped.

Incidentally, in the above embodiment, the step angle θ0 is 3i and the step angle θ0 is 3i, but the step angle is not limited to this (it may be set to an appropriate step angle such as t8.16°).

Further, in the above embodiments, a four-phase one-excitation method is described, but the present invention can also be applied to a four-phase two-excitation method or an l-phase one or two excitation method.

According to the present invention, the height of the poles gathered on the inner edge of each side of the rectangular stator core having a substantially square frame shape is set to 124 to Q, 5 times the outer diameter of the rotor. When Q is 5 times the outer diameter of the rotor, the space in which the bobbin can be stored is maximized, while setting it between 24 and 8.5 times the outer diameter of the rotor is the most efficient. You can get good mechanical output.

[Brief explanation of drawings]

Fig. 1 is a plan view of the stator core of a conventional stepping motor, Fig. 2 is a plan view of the stator core of another conventional stepping motor, Fig. 16 is a perspective view of a stepping motor showing an embodiment of the present invention, and Fig. 4 is a plan view of the stator core of a conventional stepping motor. is a partially cutaway front view of the same as above, figure 5 is an am figure with the lower frame removed,
Figure 16 is a plan view of the same core, the off view is an enlarged view of a part of the same, and Figures 18 and 9 are explanatory diagrams showing the contrast between the height of the pole and the outer diameter of the rotor. (B)...Core, cIo...Henbe, (2)・Kenai Jubentake, (To) 04) (C) (To)...Paul, (B)...
Rotor, (To) @ (To) 01)・Convex part of φ pole, 03
(2) (To) (To) - Working bobbin, (B) - Coil, wire - Convex part of the rotor. (5) C6) ('7) (θ
)(9n (lζ≧n
(fθ (be2)(
I()n O-dan
(15) (/
6 Procedural Amendment (Mutsu) 1. Display of the case 1982 Patent Application No. 104875
No. 2, Title of the invention Stepping motor 3, Relationship with the case of the person making the amendment Patent applicant: 3: Tokyo Electric Co., Ltd.: 4: Attorney: 56 Date of amendment order: None Subject of amendment: ``Detailed description of the invention'' in the specification ” Column γ correction details (1) 11! On page 8 of the detailed description, line 6 of O, correct the text ``Side edge @J'' to read ``R side edge (to)''. (Fang, page 9 of the specification says "thinner" on page 9.
"Almost equal to that," he corrected. (3) FIA detailed book, page 9, lines 14 to 10, page 1
Row Kj also has this rotor (goods) -1111. '', it is corrected as follows. "Also, the rotating shaft of this rotor (5) is rotatably supported by a bearing provided in the frame va, which will be described later." (4) From page 16 of the specification, line 12, 13 lines and 1
On page δ, there is "Distance (=) J" in the line "Distance (B)".
I am corrected. End (5) On page 21 of the specification, the line ``formed thinner'' should be corrected to ``formed approximately equal to.'' 9A22, 1987, drunken starvation Tokyo Electric Co., Ltd. Kinsha

Claims (1)

[Claims] (1) A substantially square rod-shaped rectangular stator core in which poles each having a plurality of protrusions corresponding to the step angle are assembled at the center of the inner edge of each side, each of which is fitted into each pole of this core. There are four coils wound around poles arranged around the inner edge KG of each side of this core, and a coil of four bonds arranged in the space enclosed by each coil corresponding to the convex part of the pole. 1. A stepping motor comprising: a rotor having convex portions formed on its circumferential surface according to a step angle, and the height of the pole is 124 to Q, and 5 times the outer diameter of the single trochanter.