JP2004072827A - Field control motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a magnetic circuit in series or in parallel and enhance the degree of freedom of changing a material, etc. by constituting a field control motor such that a magnet is mounted or not mounted on a rotor on motor side or on a field control rotor. <P>SOLUTION: For this field control motor, the rotor (9) on the side of the motor (130) is provided with an annular magnet (100) for the field of a field control rotor (20), and the magnetic circuit is put in series commonly for use in the motor. The rotor (9) on the side of the motor (130) is provided with a rotor magnet (100A). In the case that the field control magnet (20) does not have the magnet, the magnetic circuit is made parallel, thus enhancing the field control motor in the degree of freedom of materials at the time of constituting the motor. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a field control motor, and in particular, when a field control rotor provided inside a ring-shaped stator is mounted or unmounted, a magnetic path of a control field is set in parallel or in series to configure a field control motor. The present invention relates to a novel improvement for increasing the degree of freedom with respect to restrictions on parts, materials, shapes, sizes, etc. of the rotor and the field control rotor.
[0002]
[Prior art]
Conventionally, this type of motor has a configuration shown in FIG.
That is, a front cover 4 and a rear cover 5 are attached to both ends of a motor case 3 provided with a ring-shaped stator 2 having a stator coil 1 by attachment screws 6.
A rotary shaft 10 having a rotor 9 is rotatably provided between bearings 7 and 8 provided on the front cover 4 and the rear cover 5.
On the rear side of the rear lid 5, an encoder 11 connected to the rotating shaft 10 for detecting a rotation position and the like of the rotating shaft 10 is connected and provided.
[0003]
[Problems to be solved by the invention]
Since the conventional motor is configured as described above, there are the following problems.
That is, it is possible to change the rotation speed of the motor by changing the drive current applied to the stator coil, but it is impossible to meet the demand for freely changing the rotation speed-torque curve characteristic.
[0004]
The present invention has been made in order to solve the above problems, and in particular, controls a magnetic flux between a rotor and a ring-shaped stator by a field control unit provided inside a ring-shaped stator, and controls a rotation speed versus torque curve. By obtaining a field control motor capable of performing the control, a magnet is mounted or not mounted on the field control rotor, so that the magnetic paths of the control field are arranged in parallel or in series, and the rotor and the field control rotor when configuring the field control motor are constructed. It is an object of the present invention to provide a field control motor capable of improving a degree of freedom with respect to parts, materials, shapes, sizes, and the like.
[0005]
[Means for Solving the Problems]
The field control motor according to the present invention is configured such that a front cover and a rear cover provided at both ends of a motor case having a ring-shaped stator having a stator coil or both ends of the ring-shaped stator, and bearings provided on the front cover and the rear cover are rotated. A rotating shaft provided freely, a field control rotor having a plurality of magnets provided on the rotating shaft, and a field control coil provided on the rear lid and located inside the field control rotor and overlapping with the field control rotor. A fixed / variable magnetic field circuit having both a fixed magnetic field and a variable magnetic field by passing through the field control rotor, the ring-shaped stator and the field control yoke by controlling a current applied to the field control coil. Wherein the magnet is located at an outer peripheral position of the field control rotor and corresponds to the annular stator. A front cover and a rear cover provided at both ends of a motor case having a ring-shaped stator having a stator coil or both ends of the ring-shaped stator; and provided at the front cover and the rear cover. A rotating shaft including a field fixed rotor rotatably provided on a bearing provided and having a plurality of magnets; a field control rotor having no magnet provided on the rotating shaft adjacent to the field fixed rotor; A field control yoke having a field control coil provided on the rear lid and located inside the field control rotor and overlapping the field control rotor, and controlling a current applied to the field control coil to control the field fixed rotor and The fixed magnetic field magnetic circuit formed between the annular stators includes a variable magnetic field formed via the annular stator, the field control rotor, and the field control yoke. The field control rotor is independent of a magnetic circuit, and the field control rotor includes a first claw pole rotor having a non-magnetic ring plate shape provided on the rotation shaft, and a plurality of magnetic field control rotors provided on the first claw pole rotor. A second claw pole rotor having a second claw pole; and a third claw pole rotor provided adjacent to the second claw pole rotor and having a plurality of third claw poles. The field fixed rotor is configured to be in contact with an end face of the rotor.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a field control motor according to the present invention will be described with reference to the drawings. The same or equivalent parts as those in the conventional example will be described with the same reference numerals.
In FIG. 1, a reference numeral 1 denotes a stator coil. A front cover 4 and a rear cover 5 are attached to both ends of a motor case 3 having a ring-shaped stator 2 having the stator coil 1 by mounting screws 6. I have.
Although not shown, the front cover 4 and the rear cover 5 expose the ring-shaped stator 2 to the outside like the motor case 3 instead of the motor case 3, and attach the front cover 4 and the rear cover 5 can be directly attached.
[0007]
A rotary shaft 10 is rotatably provided between the bearings 7 and 8 provided on the front lid 4 and the rear lid 5.
A field control rotor 20 shown in FIGS. 4 and 5 is provided at an outer peripheral position of the rotating shaft 10. The field control rotor 20 includes a second claw pole rotor 30 having a second claw pole 31 and a third claw pole rotor 40 having a third claw pole 41, and an extension of the third claw pole rotor 40 in the axial direction. A plurality of magnets 100 formed also as rotor magnets for the motor are provided at the outer peripheral position of 40A, and the magnets 100 are arranged corresponding to the annular stator 2 and the stator coil 1.
[0008]
Behind the field control rotor 20, a field control yoke 22, which is provided inside the rear lid 5 and has a field control coil 21 in its cylindrical portion 22a, is inserted and disposed inside the third claw pole rotor 40. I have.
[0009]
Next, the operation will be described. Each magnet 100 acts as a motor for rotating the field control rotor 20 and the rotating shaft 10 by the magnetic action of the stator coil 1 and the ring-shaped stator 2, while the magnet 100 acts on the field control coil 21 of the field control unit 120 using the field control rotor 20. When a magnetic current is applied, as a magnetic circuit by the field control of the same action as the electromagnet by the field control coil 21 and the field control rotor 20, the magnetic path of the fixed magnetic field on the ring-shaped stator 2 and the magnetic path of the variable magnetic field on the field control unit 120 become serial. A fixed / variable magnetic field magnetic circuit 23A is formed on a path returning from the rotating shaft 10 to the rotating shaft 10 again via the field control rotor 20 and the magnet 100 via the stator coil 1 (ring-shaped stator 2) and the field controlling rotor 20.
[0010]
The fixed / variable magnetic field magnetic circuit 23A is formed in the direction of the magnetic flux indicated by the arrow as shown in FIG. The direction of the magnetic flux is a direction perpendicular to the direction of FIG. 3, the second mark 61 is a direction perpendicular to the plane of FIG. 3, and the direction of the magnetic flux is a depth direction.
Therefore, the direction of the magnetic flux can be controlled by the direction of the current applied to the field control coil 21 in the same manner as the control used for the well-known Randle-type power generation field control. The rotation state of the motor can be freely controlled by the control of canceling and reducing.
That is, by the above-described field control, the magnetic flux of the motor can be controlled, the voltage constant and the torque constant can be controlled at the same time, and the rotation speed versus torque curve of the motor can be controlled.
[0011]
Next, in another embodiment shown in FIG. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described. First, the magnetic field paths of the magnetic flux on the side of the field control unit 120 and the ring-shaped stator 2 are not in series with each other as shown in FIG. The structure of the rotor is composed of three first to third claw pole rotors 25, 30 and 40, as shown in FIGS. 6 to 13, and a plurality of rotors are provided on the outer periphery of the field fixed rotor 9A on the side of the annular stator 2. The magnet 100 is provided, and the field control rotor 20 is not provided with any magnet.
[0012]
The field control rotor 20 in FIG. 2 is configured as an individual exploded view shown in FIGS. 6 to 11. That is, the field control rotor 20 includes a first claw pole rotor 25 which is fitted to the rotating shaft 10 and has a non-magnetic ring plate shape, and a plurality of second claw poles which are disposed on the step 25a of the first claw pole rotor 25. A second claw pole rotor 30 having poles 31 at predetermined angles, a third claw pole rotor 40 disposed adjacent to the second claw pole rotor 30 and having a plurality of third claw poles 41 at predetermined angles. It is composed of The first claw pole rotor 25 made of a non-magnetic material abuts on the end face of the field fixed rotor 9A, whereby the field fixed rotor 9A and the field control rotor 20 are magnetically separated.
[0013]
As shown in FIG. 13, the second claw poles 31 and the third claw poles 41 of the field control rotor 20 are arranged alternately along the circumferential direction.
At the rear end side of the third claw pole rotor 40, a tapered opening 50 formed in a tapered shape is formed as shown by a dotted line in FIG.
[0014]
A field control yoke 22 is attached to the rear lid 5 on the rear side of the field control rotor 20, and the field control coil 21 is provided on the outer periphery of the projecting cylindrical portion 22a of the field control yoke 22, as described above.
The field control coil 21 is located in the tapered opening 50 and is disposed so as to overlap the third claw pole rotor 40, the stator coil 1 and the annular stator 2 in the radial direction.
[0015]
Next, the operation will be described. When a field current is applied to the field control coil 21 in the state of FIG. 2, the variably changing variable magnetic field magnetic circuit 23, which is a field control magnetic circuit by the field control of the same action as the electromagnet formed by the coil 21 and the rotor 20, is shown in FIG. As shown by the dotted line, a magnetic path is formed in a path that returns from the rotating shaft 10 to the rotating shaft 10 via the field control rotor 20, from the stator coil 1 (that is, the annular stator 2), via the field control rotor 20, and back again. The magnetic path of the magnetic circuit between the rotor 9 and the ring-shaped stator 2 has a fixed magnetic field magnetic circuit 23B as shown by a dotted line in FIG. 2, and the circuits 23 and 23B are formed in parallel and independently of each other.
[0016]
When viewed from the axial direction of the rotating shaft 10, the above-described variable magnetic field magnetic circuit 23 is formed in the direction of the magnetic flux indicated by the arrow as shown in FIG. 3, and the first mark 60 is perpendicular to the plane of FIG. The direction of the magnetic flux is the front direction, the direction of the second mark 61 is a direction perpendicular to the paper surface of FIG. 3, and the direction of the magnetic flux is the back direction.
Therefore, the direction of the magnetic flux can be controlled by the direction of the current applied to the field control coil 21 in the same manner as the control used for the well-known Randle-type power generation field control, and the direction of the current increases or decreases the magnetic flux to the stator coil 1 depending on the direction of the current. The rotation state of the rotor 9 as a motor can be freely controlled by the control for canceling and reducing the rotation.
That is, by the above-described field control of the field control unit 120, the increase and decrease of the magnetic flux of the fixed magnetic field magnetic circuit 23B between the rotor 9 and the annular stator 2 can be controlled, and at the same time, the voltage constant and the torque constant can be controlled. Can be controlled.
[0017]
【The invention's effect】
Since the field control motor according to the present invention is configured as described above, the following effects can be obtained.
That is, since the field control rotor and the field control coil are arranged next to the rotor constituting the motor, it is possible to control the magnetic flux between the rotor and the ring-shaped stator by the field control and to control the rotational speed versus torque curve of the motor. In addition, as shown in FIG. 1, a magnetic circuit is connected in series by using a ring magnet for a field provided in a field control unit also for a motor, and a field control unit using a rotor magnet only on the motor side as shown in FIG. 2. The configuration in which magnetic circuits are arranged in parallel by not using magnets on the side, and the degree of freedom to freely select the parts, materials, shapes, sizes, etc. of the rotor and field control rotor according to the intended use of the motor, are greater than before. This greatly improves the degree of freedom in design.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a field control motor according to the present invention.
FIG. 2 is a sectional view showing another embodiment of FIG. 1;
FIG. 3 is an explanatory diagram of field control as viewed from the axial direction in FIGS. 1 and 2;
FIG. 4 is an enlarged view showing the field control rotor of FIG. 1;
FIG. 5 is a sectional view taken along line AA of FIG. 4;
FIG. 6 is a sectional view showing a main part of FIG. 4;
FIG. 7 is a sectional view taken along line AA of FIG. 6;
FIG. 8 is a configuration diagram of a main part of FIG. 4;
FIG. 9 is a longitudinal sectional view of FIG.
FIG. 10 is a configuration diagram of a main part of FIG. 4;
11 is a longitudinal sectional view of FIG.
FIG. 12 is a sectional view of a conventional motor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stator coil 2 Ring-shaped stator 4 Front lid 5 Rear lid 7, 8 Bearing 9 Rotor 10 Rotating shaft 20 Field control rotor 21 Field control coil 22 Field control yoke 23 Variable magnetic field magnetic circuit 23A Fixed / variable magnetic field magnetic circuit 23B Fixed magnetic field magnetic circuit 25 First Claw pole rotor 30 Second claw pole rotor 31 First claw pole 40 Third claw pole rotor 41 Third claw pole 100 Ring magnet for field 100A Rotor magnet

Claims (4)

A front lid (4) and a rear lid (5) provided at both ends of a motor case (3) provided with a ring-shaped stator (2) having a stator coil (1) or both ends of the ring-shaped stator (2); A rotating shaft (10) rotatably provided on bearings (7, 8) provided on the lid (4) and the back cover (5); and a plurality of magnets (100) provided on the rotating shaft (10). And a field control yoke (22) provided on the rear lid (5) and having a field control coil (21) located inside the field control rotor (20) and overlapping the field control rotor (20). ), By controlling the current applied to the field control coil (21), to pass through the field control rotor (20), the ring-shaped stator (2) and the field control yoke (22) to form a fixed magnetic field and a variable magnetic field. Field control motor and forming a doubles fixed / variable magnetic field magnetic circuit (23A). The field control motor according to claim 1, wherein the magnet (100) is disposed at an outer peripheral position of the field control rotor (20) and corresponding to the ring-shaped stator (2). A front lid (4) and a rear lid (5) provided at both ends of a motor case (3) provided with a ring-shaped stator (2) having a stator coil (1) or both ends of the ring-shaped stator (2); A rotating shaft (10) provided with a field fixed rotor (9A) rotatably mounted on bearings (7, 8) provided on the lid (4) and the rear lid (5) and having a plurality of magnets (100). A field control rotor (20) provided on the rotating shaft (10) adjacent to the field fixed rotor (9) and having no magnet; and a field control rotor (20) provided on the rear lid (5). A field control yoke (22) having a field control coil (21) superposed on the field control rotor (20) positioned inside, and controlling a current applied to the field control coil (21) to control the field. Fixed rotor (9) The fixed magnetic field magnetic circuit (23B) formed between the annular stator (2) is a variable magnetic field magnetic circuit (23) formed via the annular stator (2), the field control rotor (20) and the field control yoke (22). A field control motor characterized by being independent of the motor. The field control rotor (20) includes a first claw pole rotor (25) provided on the rotation shaft (10) and having a non-magnetic ring shape, and a plurality of second claw members provided on the first claw pole rotor (25). A second claw pole rotor (30) having a pole (31), and a third claw pole rotor (40) provided adjacent to the second claw pole rotor (30) and having a plurality of third claw poles (41). The field control motor according to claim 3, wherein the first claw pole rotor (25) is in contact with an end surface of the field fixed rotor (9A).

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