JPS5839261A - Combine motor prepared by connecting pulse motor with brushless motor - Google Patents

Abstract

PURPOSE:To make a motor own the advantages of both of a pulse motor and a brushless motor and further to obtain a synergistic effect by connecting these two motors. CONSTITUTION:Oilless metal bearings 1 and 2 of a combine motor CM have through holes piecing a shaft 3 and are pressed in brackets 4 and 5 respectively. A stator member 7 has an armature winding 8. A magnetic plate 9 has an armature winding 10. A cylindrical rotor core 11 is made of soft iron. A printed- circuit plate 15 is fixed to the bracket 4. A hole element 19 is arranged on the side of the armature winding 10, and the output of the element is sent to a circuit member 13.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a motor that aims to obtain a synergistic effect by combining only the advantages of a pulse motor and a brushless motor.

The pulse motor is inexpensive as an open loop tlj control method and has excellent stopping characteristics. On the other hand, brushless motors have a large starting torque, high efficiency, little mechanical vibration, and the ability to minimize torque ripple.

On the other hand, pulse motors have many drawbacks other than their stopping characteristics, such as low starting torque, low efficiency, large mechanical vibrations, and large torque ripples. In addition, the brushless motor requires nine additional components such as a fairly expensive tachogenerator or encoder to control it, resulting in an expensive system, and the accuracy of the stopping position is not good.

In order to solve the above-mentioned drawbacks, the present invention provides a combine motor in which a pulse motor and a brushless motor are fully combined to combine only the advantages of both to obtain a synergistic effect. The entire purpose was to An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical diagram of a combine motor in which a pulse motor and a brushless motor are fully connected according to the present invention. Combine motor CM (D Oil-less metal bearing 1.2 located approximately in the center of shaft 3)
1111, and is press-fitted into the bracket 4.5. Cylinder h] S material 6id is a fixed KIX material for fixing the stator part 1 of a conventional pulse motor, and is made of a magnetic material such as iron.

The details of the entire stator part 1 will be described later using FIG.
It has an armature winding 8. A magnetic plate 9 provided on the inner surface of the bracket 5 has an armature winding 10 fixed thereon, and a winding plate 10 that closes the magnetic path of the field magnet 14 described later is constructed as shown in FIG. I will write about it later. The cylindrical rotor core 11 is currently made of soft iron. Rotor core 1
Small holes 18 are provided at appropriate regular intervals on the outer periphery of the 4th hole 12, and the electric circuit section 13 is entirely housed in one of the holes 12 formed by the 4th hole. Further, a flat field magnet 14 is fixed to the other side of the partition portion 11a.

The circuit board 15 is attached to the bracket 4 by means of bosses 16.17.
A Hall element 19 is disposed as a position detection element above the armature winding 10 fixed to the armature winding 10, and an electrical signal from the Hall element 19 is sent to the circuit section 13.
``It is connected to air bacteria.

A description of the element 19 will be given later. The holes 12 of the rotor core 11 not only reduce the moment of inertia of the rotor core 11, but also accommodate the circuit ff1s 13 in the hole 12. Therefore, the volume of the combine motor CM of the present invention? It also has the effect of making it smaller.

FIG. 2 shows a flat annular field magnet 14 which is important to the present invention, and is used, for example, in an anisotropic samarium magnet in the mh direction. The 'ffl' has four magnetic poles so that S poles and N poles are alternately arranged in the axial direction, and is configured symmetrically with respect to a point. Therefore, each magnetic pole is magnetized with an opening angle of 90 degrees. In addition, the field magnet 14
i=:rN(iM, S; 1 term's complete intersection 2n between equal intervals
(n is a positive integer of 1 or more) other numbers of poles may be used.

FIG. 3 is a partial view of the rotor core 11 and small teeth provided on its outer periphery. The convex portion 18A of small #118 attracts the N pole of the magnet 14 provided inside (B phenomenon, N
However, the four parts 18B of the small teeth 18 are the poles, so the total measurement of n1 bundles at the outer periphery of the rotor iron core 11 is weaker than the part marked N', so it is relatively Since it is essentially the same as the S pole, the symbol N' is added throughout. As can be seen from the convex portions 18A and 18B of the small teeth 1B, an appropriate number of convex portions are formed on the outer periphery of the rotor iron core IICMt at equal intervals. In addition, in the embodiment of the present invention, in order to make the combine motor CM' of the present invention even more accurate, the rotor 11 corresponding to the N pole of the field magnet 14 and the boundary part of 84j (magnetic pole boundary part and the arrangement) Convex portion 1 on the outer periphery of
The width of the 8A51 piece 18B is 1.5 times the total width of that portion (see FIG. 4). In the case of the one shown in FIG. 4, the entire recess is formed at the polar boundary, and the recess in this case is twice as wide as the convex part 18A1 and the concave part 1BB. 7318 A
Or a convex part or a concave part widened by the width of the concave part 1BB (the fourth
It is preferable that the recesses 18B and 111A are formed at appropriate intervals in adjacent positions. In addition, in FIG. 4, only a part of the outer circumferential part of the rotor iron core 11 is depicted, but the same is true for other parts, and if the above magnetic pole boundary part is the four parts, it is not necessarily the case that The magnetic pole boundary part does not have to be four parts, but may be a convex part. This kind of thing is caused by the rotor core 11 of the combine motor CM that is to be formed (determined by considering all aspects such as efficiency).
It is designed as appropriate based on the outer circumferential length, etc.

In addition, the widths of the convex portion 18A and the concave portion 18B are the same width in a general pulse motor, but they do not necessarily have to be the same width, and there may be some deterioration in efficiency. If it is permissible, the convex part 18A1 concave part 1BB (in this case, convex part 18A and concave part 1BB are considered to be two times wide, but it is generally done that way), and the convex part is twice as wide as above. The small teeth 18 may be formed such that the convex portions 18A and the concave portions 1BIn are alternately and evenly spaced by cutting off the purple membrane in the convex portions and concave portions. Furthermore, depending on the design, cost, etc., the convex portion 18A and the fourth portion 1 may be
The widths of 8B do not necessarily have to be the same, one is 1.5
The width may be double, double, or the like. This will become even clearer when compared with the matters explained below.

FIG. 5 shows a portion of the stator part 1. The stator 11S7 has an appropriate number of Suita pole teeth 21 (installation; differs depending on tK) formed at appropriate intervals on the surface facing the small teeth 18. On the surface of the pole tooth 21 facing the convex part 18A1 and the concave part 18B, there are formed small teeth 22 having convex parts 22A1 and concave parts 22B having the same width as the convex part 18A1 and the concave part 18B at an appropriate number and equal intervals in the circumferential direction. . The number of protrusions 22A and 22B plays a role by taking into account various conditions such as efficiency. Figure 6 is an example of the relationship with small teeth 18.22, and the protrusions 181 (
18A, 22A and the number of recesses 181 (2211) are reduced for convenience of drawing, and wide protrusions or recesses as shown in FIG. Not drawn.As is clear from this figure 6, K
Convex portion 112A and concave portion 22Ba of Tfi tooth 21, convex portion 18
A) It is in a stable state facing the recess 18B and tries to stay at that position, but it is unstable in other pole teeth 21'.
' is now about to reach a stable state, and the rotor core 11 rotates at a predetermined pitch in a predetermined direction. Therefore, the pole tooth 21°2
1' should preferably be formed so that one side is in a stable state and the other is in an unstable state. In this way, in the opposing part of the rotor core 11 and the stator part 7, there is a stable state part and an unstable state part. It is efficient if the convex portion 1 is formed so that the convex portion 1
The widths of the convex portions 18A and 22A and the concave portions 18B and 22B do not necessarily have to be the same.
The widths of B and 22B do not necessarily have to be the same. Further, the small teeth 18 and 22 are explained below to show the reverse arrangement method. Since the armature winding 10 uses a 4-pole type as the field magnet 14, it is wound in a large number of turns in a 4-way full fan frame shape so that the opening angle of the conductor portion 10a that contributes to the generated torque is 90 degrees. 3.
The armature winding 10 is fixed on the magnetic plate 9 at a pitch of 120 degrees so as not to overlap each other.
It is desirable that there be two or more.

FIG. 8 is a developed view as an example of the field magnet 14 and the armature winding 10, and the - terminal of each armature winding 10 is connected to a semiconductor arrangement r+tc device 1t23 consisting of each known transistor Q and HQt. The 0-Hall element 19, whose other terminals are connected by 7 m, may be placed on the conductor portion 10a that contributes to the generated torque, but in this case, the field magnet 14 and the armature winding 10 ( Or magnetic plate 9
), which increases the air gap between the two armature windings 10 to obtain strong torque. This is the same as placing the Hall element 19 on the conductor portion 10a that contributes to the upper generated torque. Assume that the Hall element 19 uses, for example, a four-terminal one.

Reference numeral 25 is a positive power terminal, 26 is a negative power terminal, and 27.28U output terminal. 1. If the element 19 is detecting the S pole, an output is output from the terminal 27 and the transistor Qt is derived, and if the N pole is being detected, the transistor Q+ k > S. A current in the direction is passed through the armature winding 10, and the rotor is rotated in a predetermined direction according to Frehang's left-hand rule.

Since the combine motor CIVf try of the present invention has the above-described configuration and performs the above-mentioned rotational action, it is necessary to use electric motors when attempting to achieve rotational motion with instantaneous drive and strong starting torque, and with less mechanical vibration and droop ripple. A part of the brushless motor consisting of the child winding 10 and the field magnet 14 produces rotational output? In addition, when positioning or stopping rotation, the rotational output f4 can be achieved by a part of the pulse motor, which is made up of a rotor iron core and a part of the stator, which can easily control the stop P′lI. Is it possible to get rid of the hot flashes and only have the advantages of the Amphibious motor? Since it can be pulled @ suspended, it can be effectively used in small equipment such as labor saving and microcomputer control.In addition, all the components common to pulse motors and brushless motors can be used in the same way. Since the main components of both motors are all integrally formed and compact, the number of component parts is very small and the size of the product is small, so that it can be mass-produced at low cost.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a combine motor in which a pulse motor and a brushless motor according to the present invention are combined;
The figure is a plan view of the field magnet, Figure 3 is a partial view of the rotor core and small teeth provided on its outer periphery, Figure 4 is another partial view of the rotor core, and Figure 5 is a part of the stator. 1 is a partial view, FIG. 6 is an example explanatory diagram for explaining the relationship between the small teeth of the rotor iron core and the small teeth of a part of the stator, and FIG. 7 is an example of the arrangement method of the armature winding. Explanatory drawing for showing, 488
The figure is a developed view of the armature winding and the field magnet. 1.2...Oilless metal bearing, 3...Shirt), 4.5...Bracket, 6...Cylindrical member, 1...Part of stator, 8.10...'N
fN handset wire, 9... Magnetic plate, 11... Rotor iron core, 12... Hole, 13... Circuit section,
14... Field magnet, 15... Circuit board,
16.17...Boss, 1B...Small tooth, 18
A...Convex portion, 18B...Four parts, 19...Hall element, 20...Magnetic pole boundary line, 21...Protruding pole tooth, 22...Small teeth, 23...Semiconductor rectifier .弗 l Uta No. 4 Gu No. 5, 弗 7

Claims (3)

[Claims] (1) At approximately the center of the combine motor body,
A rotary shaft is fully rotatably supported by a qII receiver, a cylindrical rotor core made of a magnetic material is coaxially fixed to the rotor shaft, and a rotor core is fixed to the rotor core so as to be perpendicular to the rotation till.
'A side wall made of magnetic material is formed, and a flat field magnet having 2n (n is a positive integer of 1 or more) magnetic poles of N and S poles is fixed to the t111 wall alternately, and The opening angle of the conductor that contributes to the generated torque on the combine motor main body side facing the field magnet is approximately the same as the 6B pole of the field magnet.
A combiner in which two or more flat armature winding groups R each having a winding shape with an opening angle width and one or more position detecting elements such as Hall elements are provided and facing the outer peripheral part of the rotor core. A part of the stator is provided on the inner surface of the motor body, and convex portions and small teeth extending 1"'r each other are formed at appropriate intervals on one of the opposing peripheral surfaces of the stator part and the rotor core. On the other hand, a pulse motor is characterized by having small tooth groups consisting of convex portions and four portions alternately at appropriate intervals, and forming a group of protruding pole teeth with a complete armature winding. and a brushless motor (!: k combined combine motor. (2) The pulse motor and brushless motor described in Paragraph (1) of Section 1 of the patent dIJ, characterized in that the group of armature windings facing the boundary magnet are arranged so as not to overlap each other. Combine motor fully connected. (3) The rotational position of the internal cavity of the circular rotor iron core is divided by a partition part, and one cavity formed by the partition part is used for storing the entire field magnet, and the other cavity is used for storing the entire field magnet. A combine motor in which the pulse motor according to claim 1 or claim 2 is combined with a brushless motor, characterized in that it is used for housing an electric circuit.