KR20050075461A - Method of winding of armature for an axial flux permanent magnet coreless machines - Google Patents

Abstract

The present invention relates to a method for manufacturing an armature winding of an axial magnetic flux permanent magnet coreless device,

An armature winding assembly of a permanent magnet coreless device with axial magnetic flux;

The armature winding is a stator, and is formed by winding a coil in a jig for stator windings that can be accommodated and wound in accordance with the width and length corresponding to the constant of the armature, which is the stator,

The jig for winding the corresponding armature coil of the inner diameter Ri and the outer diameter Ro of the axial electric machine is hexagonal,

In the jig for winding the electric coil coil, the length and angle of contact with each side of the hexagon are variably selected and assembled according to the size and number of poles and the armature constant of the permanent magnet M combined. By having

It can be applied to the axial magnetic flux permanent magnet type device, and by applying the shape of the jig to improve the density per unit volume of the coil as a method to improve the stator coil winding volume density compared to the conventional coil winding method,

By eliminating electromagnetic losses caused by iron loss and cogging torque generated by using the armature core of the existing electric equipment, the ratio of the output per unit weight of the axial equipment is improved.

Since the stator core of the armature is not used, the length in the axial direction can be made very compact mechanically, which is a useful invention having various applications.

Description

Method for manufacturing armature windings of axial flux permanent magnet coreless machines {Method of winding of armature for an axial flux permanent magnet coreless machines}

The present invention relates to a method of manufacturing an armature winding (Armature Winding) of the axial magnetic flux permanent magnet type coreless device, and more particularly, an electric magnet winding suitable for application to an electric motor, a generator and the like whose magnetic flux component of the permanent magnet is in the axial direction. It relates to the provision of a manufacturing method of.

The general 'electrical device' in the present invention refers to a rotating device such as an electric motor and a generator. In general electrical equipment, slots are formed at regular intervals in a core of a stator. The role of slots in electrical equipment is to accommodate the windings of the armature and the field.

The presence of slots has the disadvantage that the resulting electromagnetic losses and the volume density of the armature and field windings relative to the slot size and the volume of the electrical equipment are low.

In view of this problem, a slotless type is used to receive armature and field windings directly on the core, and to reduce electromagnetic losses by winding directly on the core, but this also increases the volume density of the armature and field windings. The disadvantage of being low still exists.

In general, the characteristics of the stator core of the electric equipment used are used or laminated electrical steel sheet to secure sufficient magnetic path without disturbing the flow of magnetic flux.

Electric devices using permanent magnets are mainly used for electric motors and generators.The role of permanent magnets is to replace magnetic fields that generate magnetic flux of general electric devices, and the energy of the magnetic field remains constant according to the type of permanent magnets. In this case, the circumferential magnetic flux type (RFPM) and the axial magnetic flux type (AFPM) can be classified according to the magnetic flux direction of the permanent magnet.

In the present invention, in the axial permanent magnet electric machine (see Fig. 1), it is possible to replace the role of the field winding with a permanent magnet and to receive the magnetic field energy generated in the permanent magnet electromagnetically in the armature winding without using a core, An object of the present invention is to provide an axial permanent magnet coreless electric device that improves the winding volume density of general electric devices.

More specifically, it is a coreless stator winding that improves the configuration of electric devices such as electric motors and generators, which are generally used in the related art, and has a casting epoxy resin system + coil type for casting. The armature coil is constructed in one piece.

Conventionally, various types of permanent magnet electric devices have been conceived by accommodating armature windings using a core.

In the conventional permanent magnet type electric machine, the stator is mainly composed of a core and an armature winding, and a magnet is disposed in the rotor yoke and using the mutual electromagnetic force of magnetic flux and current generated by the magnet. As a result, the weight and length of the permanent magnet type electric equipment were longer, and the width of the permanent magnet was limited.

Therefore, due to the above-described problems, the output ratio per unit weight is low, and there is a problem in that the applicability of various practical applications is lowered because it is not easy to mount in a narrow space.

In addition, since the circumferential magnetic flux permanent magnet type electric machine should be connected to the drive shaft in parallel or at right angles and provided with a connection mechanism, the use of unnecessary members should increase the cost and secure the mounting space, thereby limiting the compactness. Had

In addition, the commonly used electric equipment affects not only electrical losses but also vibration and noise of the rotating equipment due to pulsation by using a core in the stator. In addition, it is mechanically complex, and the low density of the coil winding lowers the output ratio per unit weight of the electric device, thereby lowering the overall efficiency of the electric device.

Coreless electrical equipment is evenly distributed due to the high density of coil windings, so the vibration and noise of electrical equipment due to pulsation are less affected than the rotating equipment using the core.

On the other hand, the disadvantage of the coreless electric device is that the mechanical strength is not strong and the air gap is relatively large, the magnetic flux density in the air gap is lowered, affecting the output. In order to reduce this effect, the recent development of rare earth magnets (Nd-Fe-B) having a high energy density has been a lot of these disadvantages.

Conventionally, a method of constructing a stator without using a core in an armature winding in various kinds of axial permanent magnet type electric devices has been advanced.

The coreless method used in the related art is used as a printed winding and a film coil pattern by etching the copper plate without using a general coil.

The axial permanent magnet coreless electric machine of the present invention employs an armature winding method, a coil shape, and an electromagnetically different method as compared with the film coil method.

First, the shape of the film coil is a rectangle by etching, and the general coil is a round type. The film coil method consists of an armature winding through primary processing, that is, etching and addition of insulation, to form a coil.

In addition, the shape of the film coil has a disadvantage that the volume density of the armature winding is low because it accommodates a certain gap between the coil and the coil.

Permanent magnet-type rotating machine is composed of armature winding, that is, stator and rotor with permanent magnet, with certain air gap, and magnetic flux distribution is not constant according to air gap length. In the case of the film coil, the magnetic flux accommodated in each coil layer of the armature winding and the current density of the armature winding may be low.

The manufacturing method of the armature winding of the permanent magnetic coreless device of the axial magnetic flux of the present invention does not require the primary processing by using a general coil, and the hexagonal shape that can accommodate both the shape of the permanent magnet and the magnetic energy generated from the magnet An armature winding having a constant turn number, coil pitch, and pole pitch is formed in a jig of. The gap between the coil and the coil is relatively smaller than that of the film coil, and the armature winding density per unit area is higher.

In the axial permanent magnet coreless armature winding method of the present invention, the jig shape is made of a hexagonal shape, and the stator of the axial coreless electric machine is formed of an armature winding shape of an annular shape, and thus a hexagonal coil By using the armature winding in an annular manner, the volume density of the winding can be increased. The length and angle of incidence of each side of the hexagon may vary depending on the size of the permanent magnet, the number of poles and the electromagnetic properties.

In the manufacturing method of the armature winding of the permanent magnet coreless device of the axial magnetic flux of the present invention, it is possible to continuously and integrally winding in a continuous manner manually or automatically according to the armature constant (Phase).

When assembling the armature winding manually, winding armature windings of one phase in one piece continuously with a distance between the first and second phases corresponding to the coil pitch and the pole pitch. The other phase is accommodated and assembled in an annular manner.

When assembling the armature winding automatically, the other phase accepts a certain width length of the first phase corresponding to the coil pitch and the pole pitch, and the other phase is repeatedly accommodated, and the armature winding is continuously integrally wound according to the constant, Assemble the armature winding in an annular manner.

The manufacturing method of the armature winding of the permanent magnet coreless device of the axial magnetic flux of the present invention relates to the improvement of the coreless type armature winding in the conventional electric equipment,

Compared to the conventional axial permanent magnet type electric machine, the present invention reduces the loss of electromagnetic loss and cogging torque of the stator coil by using the armature winding without using a core in the stator, and reduces the density of the armature coil winding. Has usability that can be improved

In addition, by adopting the coreless in the axial permanent magnet type electrical equipment, the output ratio per unit weight of the electrical equipment is greatly improved.

In addition, since the length is structurally shortened by improving the shortcomings of the axial permanent magnet type electric machine, the inertia is small, and the light weight is possible to have various uses such as various rotary machines.

The production method and effect of the armature winding of the axial magnetic flux permanent magnet coreless machine (Axial-Flux-Permanent Magnet Coreless-machines) of the present invention together with the accompanying drawings will be described in more detail.

1 is a longitudinal sectional view along an axis showing an exemplary configuration of a coreless device to which a method of manufacturing an armature winding of a permanent magnet coreless device of axial flux of the present invention is applied. FIG. 1A is a rotor of an axial device. Sectional view in which the structure is applied to the inner rotor method, FIG. 1B is a cross-sectional view illustrating the principle and configuration of the axial flux type device in which the rotor structure is applied to the outer rotor method.

Figure 2 is a plan view of an embodiment showing the shape of the jig and coil winding frame for the armature winding applied to the manufacturing method of the present invention, Figure 3 is an electromagnetic position of the armature winding according to the constant and the coil arrangement according to the coil applied to the constant Figure 4 is a cross-sectional view showing a part of one embodiment of the present invention, Figure 4 is a perspective view of one embodiment described in a state shown in a straight line to show the configuration of the winding body in the case of armature windings per phase to which the present invention is applied, Figure 5 Fig. 6 is a sectional view in which the electromagnetic position and coil arrangement of the armature winding of the phase are applied, and Fig. 6 is a perspective view of an embodiment described in a state shown in a straight line to show the configuration of the winding body in the case of the multiphase armature winding of the present invention, Fig. 7 Is a configuration example of the coreless winding of the present invention as a coil plan view of the electromagnetic position according to the constant of the multi-phase armature winding, 8 is a view of the final embodiment of the configuration of the axial magnetic flux coreless armature winding of the annular manner in which the armature winding according to the constant is automatically assembled.

In the manufacturing method of the armature winding of the permanent magnetic coreless device of the axial magnetic flux of the present invention,

In providing a method of manufacturing an armature winding assembly of a permanent magnet coreless device of the axial magnetic flux of the basic configuration shown by way of example in the cross-sectional view in FIG.

In the construction of the axial flux permanent magnet coreless device, the so-called 'outer rotor' type and the 'inner rotor' type will be described.

As in the cross-sectional view obtained up and down along the axis center of FIG. 1 (A),

In the axial magnetic flux permanent magnet coreless device, the outer rotor type;

The armature winding W is fixed to the shaft shaft S to be fixed as a stator. The armature winding W is fixed to an outer chassis or a bracket (not shown) and the permanent magnet M is usually radially yoke Y. The rotor R comprised as the housing | casing H which is excreted and fixed to the image is provided. Therefore, in such a configuration, the shaft shaft S is fixed and the housing H is driven to rotate.

In addition, the inner rotor method, as shown in Figure 1B, is fixed to the outer chassis or bracket not shown in the housing (H) not attached to the armature winding (W) on the yoke (Y) as the stator is prohibited from rotation As a stator,

The rotor R, in which the permanent magnet M is disposed on the shaft shaft S, is rotated to be used as the external power.

In the configuration of the axial magnetic flux permanent magnet coreless electric machine having various configurations as described above, the electromagnetic position of the permanent magnet depends on the number of permanent magnets of the rotor and the constant of the magnetic winding according to the output of the electric machine and the characteristics of the device structure. In order to accommodate the electromagnetic position of the armature winding, the width length between the coil and the coil of each phase may be changed, and the jig shape having the constant shape of the armature winding may be changed.

In addition, by being disposed in parallel on the plurality of rotors (R), the plurality of stators (S) and the shaft shaft (S) is applied to a configuration that can accommodate the drive torque and output can be arbitrarily adjusted together.

In constructing the armature winding assembly of the permanent magnet coreless device of the axial magnetic flux as described above, the optimum ratio of the inner diameter (Ri) and the outer diameter (Ro) of the axial electrical device is selected and suitable jig of the coil (Jig) ) The shape is made into a hexagon, and the hexagonal shape may be changed according to the volume of the device and the number of pole pairs.

In the coil winding method of the stator, a coil is wound automatically and manually by applying to a stator jig that can accommodate a length of a predetermined width corresponding to a constant number of the armature.

To equip the electromagnetic elements of the armature winding of an axial permanent magnet coreless device, the coil width and length of each phase may vary according to the coil pitch and the magnetic pole pitch.

A stator of an axial permanent magnet coreless device; The armature coil winding corresponds to a constant, and the coil is arranged by assembling an integral winding of the annular coil system.

The armature winding of the axial permanent magnet coreless device of the present invention manufactured as such a configuration is configured by placing the shape of the molded resin compound and the coil winding body in an integrated stator winding frame and injecting and fixing the resin compound. The stator is characterized in that an annular integral winding body is fixed to a shaped body of a standardized resin compound.

By applying the jig shape that can improve the density per unit volume of the coil of the stator armature winding of the axial permanent magnet type coreless device, the conventional copper plate is etched without using a general coil to print and wind Compared to coreless electrical equipment used as film coil pattern,

(1) Film coil method consists of armature winding through primary processing, that is, etching and addition of cutting material, to make coil form.

In addition, the shape of the film coil has a disadvantage that the volume density of the armature winding is low because it accommodates a certain gap between the coil and the coil.

1, since the armature winding disclosed in the present invention uses a general round coil, no primary processing is required to accommodate the axial armature winding, and a gap between the coil and the coil is relatively higher than that of the film coil. It is small and has a high armature winding density per unit area.

5 and 7, the permanent magnet type rotary machine is composed of an armature winding, that is, a rotor in which stators and permanent magnets are disposed with a certain gap, and magnetic flux distribution is not constant according to the air gap length. .

5 shows the electromagnetic coil position in the air gap when the one-phase armature winding is applied to an axial magnetic flux permanent magnet coreless device.

7 shows the electromagnetic coil position in the air gap when the three-phase armature winding is applied to an axial magnetic flux permanent magnet coreless device.

In the case of the film coil, the magnetic flux received in each coil layer of the armature winding and the current density of the armature winding may not be uniform. In the axial permanent magnet coreless armature winding system of the present invention, the coil winding arrangement of each phase in the air gap is symmetrically received, so that the current density of the magnetic flux and armature windings accommodated in each coil layer is uniform.

(3) In the method of manufacturing the armature winding of the permanent magnet coreless device of the axial magnetic flux of the present invention in Figures 2 and 3, the jig shape is made of a hexagon, and the shape of the permanent magnet and the magnet Hexagonal jig that can accommodate all of the magnetic energy has been shown to consist of a series of armature windings with a constant number of turns, coil pitch and pole pitch. Means the end of the winding.

In FIG. 7, since the stator of the axial coreless electric machine is configured in the form of an annular armature winding, the volume density of the winding can be increased by using the armature winding in the annular manner. The length and angle of incidence of each side of the hexagon may vary depending on the size and number of poles and the electromagnetic properties of the permanent magnet.

4, 6, and 8 in the axial permanent magnet coreless armature winding method of the present invention can be wound integrally or continuously continuously or manually according to the armature constant (Phase).

As shown in Figure 4, when assembling the armature winding manually, winding the armature winding of one phase in one piece continuously with a certain distance between the first phase and the second phase corresponding to the coil pitch and the pole pitch, in the next process Between phases of one phase the other phases are accommodated and assembled in an annular fashion.

As shown in FIG. 6, when assembling the armature windings automatically, the other phases are accommodated with a certain width length of the first phase corresponding to the coil pitch and the pole pitch, and the other phases are repeatedly received, and the armature windings are continuously integrated according to a constant. Winding, and assembling an integrated armature winding in an annular manner as shown in FIG.

The manufacturing method of the armature winding of the permanent magnetic coreless device of the axial magnetic flux of the present invention as described above, the stator jig that can accommodate a length of a predetermined width corresponding to the constant of the armature in the coil winding method of the stator ( It is applied to Jig) and winding coil by automatic and manual.

The coil width and length of each phase may vary according to the coil pitch and the magnetic pole pitch in order to provide an electromagnetic element of the armature winding of the axial permanent magnet coreless device.

The armature coil winding corresponds to a constant, and the coil is accommodated by assembling an integral winding of an annular coil type, and the winding body is fixed to the shaped body of the resin compound in which the annular integral armature winding is formed. The coil stator is configured as an axial magnetic flux device, and is fixed to the shaft shaft S according to the purpose of use, and the permanent magnet rotor is mounted so that the housing H rotates, or the integral mold coil stator is fixed to the enclosure and the permanent magnet It is an additional feature that it is applied to the configuration to rotate the rotor mounted on the shaft.

The production method of the present invention having such a feature;

It can be applied to the axial magnetic flux permanent magnet type device, and by applying the shape of the jig that can improve the density per unit volume of the coil as a method of improving the stator coil winding volume density compared to the conventional coil winding method, By eliminating electromagnetic losses caused by iron loss and cogging torque generated by using the armature core of the existing electric equipment, the ratio of the output per unit weight of the axial device is improved.

Since the stator core of the armature is not used, the length in the axial direction can be made very compact mechanically, which is a useful invention having various applications.

1 is a longitudinal sectional view along an axis showing an exemplary configuration of a coreless device to which a method of manufacturing an armature winding of a permanent magnet coreless device of axial flux of the present invention is applied. FIG. 1A is a rotor of an axial device. Sectional view in which the structure is applied to the inner rotor method, FIG. 1B is a cross-sectional view illustrating the principle and configuration of the axial flux type device in which the rotor structure is applied to the outer rotor method.

2 is a plan view of an embodiment showing the form of a jig and coil winding frame for an armature winding to which a method of manufacturing an armature winding of a permanent magnet coreless device of axial flux according to the present invention is applied;

3 is an electromagnetic position of an armature winding according to a phase-number in a method of manufacturing an armature winding of a permanent magnetic coreless device of an axial magnetic flux of a permanent magnetic coreless device of an axial magnetic flux; A cross-sectional view showing a portion of one embodiment of an armature winding with coil arrangement according to a constant applied.

Figure 4 is a perspective view of one embodiment described in a straight line in order to show the configuration of the winding body in the case of an armature winding of one phase to which the present invention is applied.

5 is a cross-sectional view to which the electromagnetic position and coil arrangement of the armature winding of one phase are applied.

Fig. 6 is a perspective view of an embodiment described in a state shown in a straight line to show the configuration of the winding body in the case of the multiphase armature winding of the present invention.

7 is a plan view of the coil arrangement of the electromagnetic position according to the constant of the multiphase armature winding as an example of the axial magnetic flux permanent magnet coreless winding of the present invention.

FIG. 8 is a diagram of a final embodiment of the configuration of an axial magnetic flux coreless armature winding in an annular manner in which an armature winding according to a constant is automatically assembled in an axial magnetic flux permanent magnet coreless device.

Explanation of symbols on main parts of drawing

W: Armature Winding

E-W: Winding end

M: Permanent Magnet

R: Rotor

S: Stator

Ri: Inner radius

Ro: Outer radius

Y: York

Claims (5)

An armature winding assembly of a permanent magnet coreless device of axial flux; The armature winding is a stator, The coil is wound around a jig for stator windings that can be accommodated and wound in accordance with the width and length corresponding to the constant of the armature, which is the stator. The jig for winding the corresponding armature coil of the inner diameter Ri and the outer diameter Ro of the axial electric machine is hexagonal, The angular magnetic flux of the axial magnetic flux of the armature coil winding jig for the length and angle of the inscribed side of the hexagonal magnets are variably selected and assembled according to the size of the permanent magnet (M) combined and the number of poles and the constant of the armature. Method for manufacturing armature winding of permanent magnet coreless device. An armature winding assembly of a permanent magnet coreless device of axial magnetic flux; The armature winding is a stator, The armature winding is arranged to assemble the coil of the integral winding of the annular coil type corresponding to the constant, The coil width and length of each phase are varied according to the coil pitch and the magnetic pole pitch of the armature winding, The stator for the armature is a permanent magnet coreless device of the axial magnetic flux characterized in that it is formed by placing the shape of the resin compound and the armature coil winding body formed in the unitary stator winding frame and fixed after injecting the resin compound Method of manufacturing armature windings. In the armature winding assembly of a permanent magnet coreless device of axial magnetic flux, The armature winding is a stator, Winding in one piece continuously and manually / automatically according to the armature's constant, In the case of the passive armature winding, the armature winding is continuously wound integrally by the number of coils in one phase with a certain distance between the first phase and the second phase corresponding to the coil pitch and the pole pitch, and the constant phase of one phase in the following process. The different phase is accommodated between the gaps and assembled in an annular manner, In the case of the automatic armature winding, the other phase is accommodated in a predetermined widthwise length of the first phase corresponding to the coil pitch and the pole pitch, and the other phase is repeatedly accommodated, and the armature winding is continuously winding integrally and integrally according to a constant. A method of manufacturing an armature winding of a permanent magnet coreless device of axial magnetic flux, characterized in that the armature winding is assembled in an annular manner. The method according to any one of claims 1 to 3, The armature winding; The armature winding (W) is fixed to the shaft shaft (S) by mounting as a stator, and the rotor (R) configured as a housing (H) to excrete and secure the permanent magnet (M) on the yoke (Y) The shaft shaft (S) is fixed and the outer rotor method of rotating the housing (H), Inner rotor in which the rotor (H), which has the permanent magnet (M) disposed on the shaft shaft (S), is rotated by the housing (H) having the armature winding (W) attached to the yoke (Y) as a stator. A method of manufacturing an armature winding of a permanent magnetic coreless device of the axial magnetic flux, characterized in that it can be applied to both methods. The method according to claim 3 or 4, Depending on the output of the axial electric machine and the characteristics of the device structure, the rotor and the integrated armature windings of the annular coil and the permanent magnet are arranged in parallel in the axial direction with the shaft axis S as the axial center. A method of manufacturing an armature winding of a permanent magnet coreless device of axial flux, which can be mounted.