CN106972729A - Circular Winding magnetic field modulation linear electric motors - Google Patents

Abstract

The utility model relates to a ring winding magnetic field modulation linear motor, which belongs to the field of motors. It solves the problems of waste of materials caused by the length of the end of the winding of the traditional linear permanent magnet motor and the winding method of the winding, the complicated insulation process between the windings, the large fluctuation of the thrust of the motor, and the low efficiency. The invention includes primary and secondary, there is a gap between the primary and secondary, the primary and secondary pole slots are matched and the ring winding is used, and the non-uniform air gap magnetic conductance is used to play the role of "changing poles", and the magnetomotive force of the primary winding and the The air gap permeance interacts to generate a magnetic field with the same number of poles as the secondary permanent magnet, and then the two magnetic fields interact to generate a constant thrust, which breaks through the limitation that the primary and secondary poles of the traditional linear permanent magnet synchronous motor must be the same. The number of pole pairs P of the secondary permanent magnet, the number of slots on each side of the primary side Q, and the number of pole pairs S of the fundamental magnetomotive force of the primary winding need to satisfy the following relationship: P=Q±S. The invention is suitable for occasions such as low speed, high acceleration, and large output thrust.

Description

Toroidal Winding Field Modulated Linear Motor

technical field

The invention belongs to the field of motors.

Background technique

The relationship 3τ _t = τ _p is satisfied between the armature core tooth pitch τ _t of the traditional unilateral flat three-phase linear permanent magnet synchronous motor and the permanent magnet pole pitch τ _p , and a coil side is embedded in each slot, and the coil The pitch is equal to the pole pitch, and this winding structure is called integer slot single-layer winding. The winding of the motor is shown in Figure 1. The coil of the A-phase winding is wound in the first slot and the fourth slot, while crossing the second and third slots. The coil of the C-phase winding is in the first slot. The second slot and the fifth slot are wound, while the third slot and the fourth slot are straddled, and so on. The main problem of this type of winding is that the ends of the winding coils of each phase exposed outside the core teeth are relatively long, and the winding coils of each phase cross each other, which not only wastes the coils, increases copper loss, but also makes the insulation between the windings of each phase The process becomes complicated, increasing the manufacturing cost. At the same time, because the winding is a single-layer full-pitch winding, the magnetomotive force and electromotive force harmonic components of the winding are large, the thrust fluctuation of the motor is large, and the efficiency is low. Moreover, because the end of the winding is long, the secondary lateral support span is large, which increases the Support difficulty.

Contents of the invention

The present invention aims to solve the problems of the end length of the winding of the traditional linear permanent magnet motor and the waste of materials caused by the winding mode of the winding, the complicated insulation process between the windings, the large fluctuation of the thrust of the motor and the low efficiency. The present invention provides a ring winding magnetic field Modulate the linear motor, the implementation form of the motor is as follows:

Option One:

Toroidal winding field modulated linear motor, which consists of a primary and a secondary with an air gap between them,

The secondary is a double-sided structure, and the primary is set between the two sides. A secondary permanent magnet is arranged on the air gap side of the double-sided structure. The magnetization direction of the secondary permanent magnet is perpendicular to the direction of motion, and the two adjacent The magnetization directions of the secondary permanent magnets are opposite, and the magnetization directions of the secondary permanent magnets at the corresponding positions on both sides are the same.

The primary includes a primary iron core and a primary winding. Primary slots are longitudinally opened on the left and right air gap sides of the primary iron core, and a primary winding is arranged in the slot. The primary winding is realized by a ring winding and is in the form of a three-phase symmetrical winding;

The number of pole pairs of the secondary permanent magnets on the unilateral secondary is P, and the number of slots on each air gap side is Q in the left and right air gap sides of the primary core.

The number of pole pairs of the fundamental magnetomotive force of the primary winding is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτ _t ,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

Option II:

Toroidal-winding field-modulated linear motors, which consist of a primary and a secondary with an air gap between them;

The secondary is a "concave" three-sided structure, and the primary is set in the groove of the "concave" three-sided structure. A secondary permanent magnet is arranged on the air gap side of the "concave" three-sided structure. The secondary permanent magnet The magnetization direction is perpendicular to the direction of motion, and the magnetization directions of the two adjacent secondary permanent magnets on one side are opposite, and the magnetization directions of the corresponding positions of the secondary permanent magnets on the three sides are the same;

The primary includes the primary iron core and the primary winding. The primary slots are longitudinally opened on the left and right air gap sides of the primary iron core, and the primary slots are opened transversely on the lower air gap side of the primary iron core. The slots on the three air gap sides are connected to a common A primary winding is provided, and the primary winding is realized by a ring winding, and is in the form of a three-phase symmetrical winding;

The number of pole pairs of the unilateral secondary permanent magnet is P,

The number of slots on each air gap side of the primary core is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτt,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

third solution:

Toroidal-winding field-modulated linear motors, which consist of a primary and a secondary with an air gap between them;

The primary includes the main primary core, primary winding and two auxiliary primary cores; the two auxiliary primary cores are located on both sides of the main primary core, and the primary slots are longitudinally opened on the left and right air gap sides of the main primary core. A primary winding is provided, and the primary winding is realized by a ring winding, and is in the form of a three-phase symmetrical winding;

The secondary is a double-sided structure, and the two sides are respectively located between the main primary core and the two auxiliary primary cores. A secondary permanent magnet is embedded on each side of the secondary, and the secondary permanent magnet faces the main primary core and the auxiliary primary core at the same time. Iron core, the magnetization direction of the secondary permanent magnet is perpendicular to the direction of motion, and the magnetization direction of the two adjacent secondary permanent magnets on each side is opposite, and the magnetization direction of the secondary permanent magnets at the corresponding positions on both sides is the same;

The auxiliary primary core is a square block, and the air gap side of the auxiliary primary core is longitudinally opened with primary slots, and the primary slots are consistent with the primary slots opened on the air gap side of the main primary core;

The pole pairs of the secondary permanent magnets on the unilateral secondary are all P,

The number of side slots for each air gap of the main primary core is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτt,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

A primary winding is embedded in the primary slot opened on the air gap side of the auxiliary primary core, and the primary winding is realized by ring winding in a three-phase symmetrical winding form.

Option four:

Ring winding magnetic field modulation linear motor, which includes a primary and a secondary, the secondary is located inside the primary, and the two are coaxial and have an air gap;

The primary includes a primary iron core and a primary winding. The primary iron core is a cylindrical structure. Primary slots are opened along the circumferential direction on the inner surface of the primary iron core. The primary slots are evenly arranged along the direction of motion, and the primary winding is embedded in the primary slot. The primary winding is realized by ring winding, and it is a three-phase symmetrical winding form;

The secondary is a cylindrical or cylindrical structure, and its outer surface is pasted with a ring-shaped secondary permanent magnet. The magnetization direction of the ring-shaped secondary permanent magnet is perpendicular to the direction of motion, and the adjacent two ring-shaped secondary The magnetization direction of the permanent magnet is opposite,

The number of pole pairs of the annular secondary permanent magnet is P,

The number of slots on the air gap side of the primary core is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτt,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

Option five:

Ring winding magnetic field modulation linear motor, which includes primary and secondary, the primary is located inside the secondary, the two are coaxial, and there is an air gap;

The primary includes a primary iron core and a primary winding. The primary iron core is a cylindrical or cylindrical structure. The outer surface of the primary iron core is provided with primary slots along the circumferential direction. The primary slots are evenly arranged along the direction of motion, and the primary windings are embedded in the primary slots. The primary winding is realized by ring winding, and it is a three-phase symmetrical winding form;

The secondary is a cylindrical structure, and the inner surface of the secondary is pasted with a ring-shaped secondary permanent magnet. The magnetization direction of the ring-shaped secondary permanent magnet is perpendicular to the direction of motion, and the adjacent two ring-shaped secondary The magnetization direction of the permanent magnet is opposite;

The number of pole pairs of the annular secondary permanent magnet is P,

The number of slots on the outer surface of the primary core is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτ _t ,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

Option six:

Toroidal winding magnetic field modulated linear motor, which includes a primary and a secondary, with the primary positioned above the secondary with an air gap between them;

The primary includes a primary iron core and a primary winding. Primary slots are opened transversely on the air gap side of the primary iron core, and primary windings are arranged in the slots. The primary windings are realized by ring windings and are in the form of three-phase symmetrical windings;

The secondary is a unilateral structure, and the air gap side of the secondary is provided with a secondary permanent magnet, the magnetization direction of the secondary permanent magnet is perpendicular to the direction of motion, and the magnetization direction of the two adjacent secondary permanent magnets is opposite;

The number of pole pairs of the secondary permanent magnet is P,

The number of slots on the air gap side of the primary core is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτ _t ,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

Option seven:

Toroidal winding magnetic field modulated linear motor, which includes a primary and a secondary, with the primary positioned above the secondary with an air gap between them;

The primary includes a primary iron core and a primary winding. Primary slots are opened transversely on the upper and lower surfaces of the primary iron core, and a primary winding is embedded in each primary slot. The primary winding is realized by a ring winding and is a three-phase symmetrical winding form. ;

The secondary is a unilateral structure, and the air gap side of the secondary is provided with a secondary permanent magnet, the magnetization direction of the secondary permanent magnet is perpendicular to the direction of motion, and the magnetization direction of the two adjacent secondary permanent magnets is opposite;

The number of pole pairs of the secondary permanent magnet is P,

The number of slots on the air gap side of the primary core is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτ _t ,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

Principle analysis: By adopting specific primary and secondary pole-slot coordination and ring windings, the uneven air gap permeance is used to play the role of "changing poles". The magnetomotive force of the primary winding interacts with the air gap permeance to generate a The magnetic field with the same number of poles of the primary permanent magnet, and then the two magnetic fields interact to generate a constant thrust, thus breaking through the limitation that the number of primary and secondary poles of the traditional linear permanent magnet synchronous motor must be the same. It not only reduces the length and loss of the winding end, improves the efficiency of the motor, but also reduces the thrust fluctuation, reduces the vibration and noise of the motor, and at the same time, the motor has a simple structure, easy insulation, low manufacturing cost, and high reliability. It is suitable for use in Low speed, high acceleration, large output thrust and other occasions.

The invention can increase the thrust density of the linear motor, reduce thrust fluctuation, reduce motor vibration and noise, and meanwhile the motor has simple structure, low manufacturing cost and high reliability, and is suitable for occasions such as low speed, high acceleration and large output thrust.

Description of drawings

Fig. 1 is the schematic diagram of the winding principle of the flat-plate permanent magnet linear synchronous motor described in the background technology; Wherein, X represents the reverse of A-phase winding, Y represents the reverse of B-phase winding, Z represents the reverse of C-phase winding;

Fig. 2 is a three-dimensional structural schematic diagram of the annular winding magnetic field modulation linear motor described in Embodiment 1;

Fig. 3 is the front view of the motor shown in Fig. 2;

Fig. 4 is the sectional view of Fig. 3 in B-B direction;

Fig. 5 is a cross-sectional view of Fig. 3 along the direction A-A.

6 is a three-dimensional structural schematic diagram of the annular winding magnetic field modulation linear motor described in the second embodiment;

Figure 7 is a top view of Figure 6;

Figure 8 is a side view of Figure 6;

Fig. 9 is a three-dimensional structural schematic diagram of the annular winding magnetic field modulation linear motor described in the third embodiment;

Figure 10 is a top view of Figure 9;

Figure 11 is a side view of Figure 9;

Fig. 12 is a three-dimensional structural schematic diagram of the annular winding magnetic field modulation linear motor described in Embodiment 4;

Figure 13 is a top view of Figure 12;

Figure 14 is a side view of Figure 12;

Fig. 15 is a three-dimensional structural schematic diagram of the annular winding magnetic field modulation linear motor described in Embodiment 5;

Figure 16 is a side view of Figure 15;

Fig. 17 is a main sectional view of Fig. 15;

Fig. 18 is a schematic structural diagram of the secondary of the annular winding magnetic field modulation linear motor described in Embodiment 6;

Fig. 19 is a diagram of the relative position relationship between the primary and the secondary of the annular winding magnetic field modulation linear motor described in Embodiment 6;

Figure 20 is a cross-sectional view of Figure 19 in the A-A direction;

Fig. 21 is a three-dimensional structural schematic diagram of the annular winding magnetic field modulation linear motor described in the seventh embodiment;

Fig. 22 is the front view of Fig. 21;

Figure 23 is a side view of Figure 21;

Fig. 24 is a three-dimensional structural schematic diagram of the annular winding magnetic field modulation linear motor described in Embodiment 8;

Fig. 25 is the front view of Fig. 24;

Figure 26 is a bottom view of Figure 24;

FIG. 27 is a side view of FIG. 24 .

detailed description

Specific embodiment 1: Refer to Fig. 2 to Fig. 5 to illustrate this embodiment, the annular winding magnetic field modulation linear motor described in this embodiment includes a primary 1 and a secondary 2, and there is an air gap between them,

The secondary 2 is a double-sided structure, and the primary 1 is arranged between the two sides, and a secondary permanent magnet 2-1 is arranged on the air gap side of the bilateral structure, and the magnetization direction of the secondary permanent magnet 2-1 is perpendicular to the direction of motion, and The magnetization directions of the two adjacent secondary permanent magnets 2-1 on one side are opposite, and the magnetization directions of the secondary permanent magnets 2-1 corresponding to the two sides are the same,

The primary 1 includes a primary iron core 1-1 and a primary winding 1-2. Primary slots are longitudinally opened on the left and right air gap sides of the primary iron core 1-1, and the primary winding 1-2 is arranged in the slot. The primary winding 1-2 is realized by ring winding, and is a three-phase symmetrical winding form;

The number of pole pairs of the secondary permanent magnet 2-1 on the unilateral secondary 2 is P, and in the left and right air gap sides of the primary core 1-1, the number of slots on each air gap side is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding 1-2 is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτ _t ,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

In this embodiment, the primary iron core can be made of laminated silicon steel sheets, and the ring winding has a shorter end, which saves copper and has a lower winding temperature rise. Since there is no overlap between the windings, the mutual inductance is negligible. Stage 2 is a bilateral structure. One side of the primary core and one effective side of the winding form a magnetic circuit with the air gap and the secondary on the same side. The magnetic circuit is primary-winding-air gap-permanent magnet-secondary-permanent Magnet-air gap-winding-primary, the motor has two magnetic circuits, and the two parts of the magnetic circuits are connected in parallel, which can realize the superposition of electromagnetic thrust and increase the thrust of the motor while saving space.

Specific Embodiment 2: Refer to Fig. 6 to Fig. 8 to illustrate this embodiment, the annular winding magnetic field modulation linear motor described in this embodiment includes a primary 1 and a secondary 2, and there is an air gap between them;

The secondary 2 is a "concave" three-sided structure, and the primary 1 is set in the groove of the "concave" three-sided structure, and the air gap side of the "concave" three-sided structure is provided with a secondary permanent magnet 2-1 , the magnetization direction of the secondary permanent magnet 2-1 is perpendicular to the direction of motion, and the magnetization direction of the two adjacent secondary permanent magnets 2-1 on one side is opposite, and the secondary permanent magnet 2 at the corresponding position on the three sides The magnetization direction of -1 is the same;

The primary 1 includes a primary iron core 1-1 and a primary winding 1-2. Primary slots are longitudinally opened on the left and right air gap sides of the primary iron core 1-1, and transversely opened on the lower air gap side of the primary iron core 1-1. The primary slots, the three slots on the air gap side are connected to jointly set the primary winding 1-2, the primary winding 1-2 is realized by ring winding, and is in the form of a three-phase symmetrical winding;

The number of pole pairs of the unilateral secondary permanent magnet 2-1 is P,

The number of side slots for each air gap of the primary core 1-1 is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding 1-2 is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτt,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

In this embodiment, the secondary 2 is a "concave"-shaped three-sided structure, and an effective side is added on the basis of the double-sided structure, so that the space utilization rate of the motor is higher and the thrust is greater.

One side of the primary core and one effective side of the winding form a magnetic circuit with the air gap and the secondary on the same side, which is primary-winding-air gap-permanent magnet-secondary-permanent magnet-air gap-winding-primary , the motor has three magnetic circuits connected in parallel, which can realize the superposition of electromagnetic thrust and increase the thrust of the motor while saving space.

Specific embodiment three: referring to Fig. 9 to Fig. 11 to illustrate this embodiment, the annular winding magnetic field modulation linear motor described in this embodiment includes a primary 1 and a secondary 2, and there is an air gap between them;

The primary 1 includes a main primary core 1-1, a primary winding 1-2 and two auxiliary primary cores 1-3; the two auxiliary primary cores 1-3 are located on both sides of the main primary core 1-1, and on the main primary core 1- The left and right air gap sides of 1 have primary slots along the longitudinal direction, and primary windings 1-2 are arranged in the slots, and the primary windings 1-2 are realized by ring windings, and are in the form of three-phase symmetrical windings;

The secondary 2 is a double-sided structure, and the two sides are respectively located between the main primary core 1-1 and the two auxiliary primary cores 1-3, and a secondary permanent magnet 2-1 is embedded on each side of the secondary 2. The primary permanent magnet 2-1 faces the main primary core 1-1 and the auxiliary primary core 1-3 at the same time, the magnetization direction of the secondary permanent magnet 2-1 is perpendicular to the direction of motion, and the two adjacent secondary permanent magnets on each side The magnetization directions of the permanent magnets 2-1 are opposite, and the magnetization directions of the secondary permanent magnets 2-1 at corresponding positions on both sides are the same;

The auxiliary primary core 1-3 is a square block, and the air gap side of the auxiliary primary core 1-3 is provided with primary slots along the longitudinal direction, and the primary slots are consistent with the primary slots opened on the air gap side of the main primary core 1-1;

The pole pairs of the secondary permanent magnets 2-1 on the unilateral secondary 2 are all P,

The number of side slots for each air gap of the main primary core 1-1 is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding 1-2 is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S _,

2Pτ _p = Qτt,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

In this embodiment, one side of the primary core and one effective side of the winding form a closed magnetic circuit with two layers of air gaps, secondary and auxiliary primary, and the magnetic circuit is primary-winding-air gap-secondary-auxiliary primary -Air gap-Permanent magnet-Secondary-Permanent magnet-Air gap-Winding-Primary, then the motor has two magnetic circuits and superimposed in parallel with each other, because the secondary has a smaller weight and smaller volume than the primary, for For specific use occasions, it is possible to use a dynamic secondary movement form.

Since the secondary has a smaller weight than the primary, the smaller volume is specifically reflected in: since the primary is composed of the primary core and windings, the overall weight is much higher than the weight of the secondary fixed aluminum plate and permanent magnet, and the secondary overall The volume is smaller, therefore, in specific operating occasions, the operation mode of the dynamic secondary is more advantageous.

Specific Embodiment 4: Refer to FIG. 9 to FIG. 14 to illustrate this embodiment. The difference between this embodiment and the annular winding magnetic field modulation linear motor described in Embodiment 3 is that the air gap side of the auxiliary primary core 1-3 is The primary winding 1-2 is embedded in the opened primary slot, and the primary winding 1-2 is realized by ring winding, and is in the form of three-phase symmetrical winding.

In this embodiment, one side of the primary core and one effective side of the winding form a closed magnetic circuit with two layers of air gaps, the secondary and the auxiliary primary, and the magnetic circuit is primary-winding-air gap-secondary-winding- Auxiliary primary-winding-air gap-permanent magnet-secondary-permanent magnet-air gap-winding-primary, then the motor has two magnetic circuits and superimposed in parallel with each other, since the secondary has a smaller weight than the primary, smaller The volume, for specific use occasions, can be in the form of a dynamic secondary.

In this embodiment, the auxiliary primary excitation winding is added to increase the air gap magnetic density as a part of the magnetic circuit, which can further increase the thrust density of the motor, thereby increasing the thrust of the motor.

Since the secondary has a smaller weight than the primary, the smaller volume is specifically reflected in: since the primary is composed of the primary core and windings, the overall weight is much higher than the weight of the secondary fixed aluminum plate and permanent magnet, and the secondary overall Smaller size. Therefore, in specific operating occasions, the dynamic secondary operation mode has more advantages.

Specific Embodiment 5: Referring to Fig. 15 to Fig. 17 to illustrate this embodiment, the annular winding magnetic field modulation linear motor described in this embodiment includes a primary 1 and a secondary 2, the secondary 2 is located inside the primary 1, and the two Coaxial with an air gap;

The primary 1 includes a primary iron core 1-1 and a primary winding 1-2. The primary iron core 1-1 has a cylindrical structure, and primary slots are opened on the inner surface of the primary iron core 1-1 along the circumferential direction, and the primary slots are evenly arranged along the moving direction. , and the primary winding 1-2 is embedded in the primary slot, and the primary winding 1-2 is implemented by a ring winding, and is in the form of a three-phase symmetrical winding;

The secondary 2 is a cylindrical or cylindrical structure, and an annular secondary permanent magnet 2-1 is pasted on its outer surface. The magnetization direction of the annular secondary permanent magnet 2-1 is perpendicular to the direction of motion, and the adjacent The magnetization directions of the two annular secondary permanent magnets 2-1 are opposite,

The number of pole pairs of the annular secondary permanent magnet 2-1 is P,

The number of slots on the air gap side of the primary core 1-1 is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding 1-2 is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτ _t ,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

In this embodiment, the structure of the cylindrical linear motor is adopted, and a magnetic circuit is formed by the primary core-winding-air gap-permanent magnet-secondary-permanent magnet-air gap-winding-primary, which is equivalent to the unilateral structure of the motor , and the structure of the outer mover, because the cylindrical linear motor has a uniform air gap, so that the motor has no longitudinal end effect, reducing the thrust fluctuation of the motor.

Specific Embodiment 6: Referring to Fig. 18 to Fig. 20 to illustrate this embodiment, the annular winding magnetic field modulation linear motor described in this embodiment includes a primary 1 and a secondary 2, the primary 1 is located inside the secondary 2, and both shaft with an air gap;

The primary 1 includes a primary iron core 1-1 and a primary winding 1-2. The primary iron core 1-1 is a cylindrical or cylindrical structure. The outer surface of the primary iron core 1-1 is provided with primary slots along the circumferential direction, and each primary slot is uniform along the direction of motion. Arranged, and the primary winding 1-2 is embedded in the primary slot, and the primary winding 1-2 is realized by annular winding, and is in the form of three-phase symmetrical winding;

The secondary 2 is a cylindrical structure, and the inner surface of the secondary 2 is pasted with a ring-shaped secondary permanent magnet 2-1. The magnetization direction of the ring-shaped secondary permanent magnet 2-1 is perpendicular to the direction of motion, and is adjacent to The magnetization directions of the two annular secondary permanent magnets 2-1 are opposite;

The number of pole pairs of the annular secondary permanent magnet 2-1 is P,

The number of slots on the outer surface of the primary core 1-1 is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding 1-2 is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτt,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

In this embodiment, the structure of the cylindrical linear motor is adopted, and a magnetic circuit is formed by the primary core-winding-air gap-permanent magnet-secondary-permanent magnet-air gap-winding-primary, which is equivalent to the unilateral structure of the motor , and the structure of the inner mover, because the cylindrical linear motor has a uniform air gap, so that the motor has no longitudinal end effect, reducing the thrust fluctuation of the motor.

Specific Embodiment 7: Referring to Fig. 21 to Fig. 23 to illustrate this embodiment, the annular winding magnetic field modulation linear motor described in this embodiment includes a primary 1 and a secondary 2, the primary 1 is located above the secondary 2, and the two there is an air gap between

The primary 1 includes a primary iron core 1-1 and a primary winding 1-2. A primary slot is opened transversely on the air gap side of the primary iron core 1-1, and a primary winding 1-2 is arranged in the slot. The primary winding 1-2 adopts a ring The winding is realized, and it is a three-phase symmetrical winding form;

The secondary 2 is a unilateral structure, and the air gap side of the secondary 2 is provided with a secondary permanent magnet 2-1, the magnetization direction of the secondary permanent magnet 2-1 is perpendicular to the direction of motion, and the adjacent two secondary The magnetization direction of the permanent magnet 2-1 is opposite;

The number of pole pairs of the secondary permanent magnet 2-1 is P,

The number of air gap side slots of the primary core 1-1 is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding 1-2 is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτt,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

This embodiment is a unilateral structure, which forms a closed magnetic circuit with the primary-winding-air gap-permanent magnet-secondary-permanent magnet-air gap-primary. Since the first to sixth embodiments are natural cooling structures, the current density is limited. In this embodiment, another cooling device can be added to increase the current density to increase the thrust density of the motor, thereby obtaining greater thrust.

Embodiment 8: Referring to Fig. 24 to Fig. 27 to illustrate this embodiment, the annular winding magnetic field modulation linear motor described in this embodiment includes a primary 1 and a secondary 2, the primary 1 is located above the secondary 2, and the two there is an air gap between

The primary 1 includes a primary iron core 1-1 and a primary winding 1-2. Primary slots are opened transversely on the upper and lower surfaces of the primary iron core 1-1, and a primary winding 1-2 is embedded in each primary slot. Winding 1-2 is realized by ring winding, and is a three-phase symmetrical winding form;

The secondary 2 is a unilateral structure, and the air gap side of the secondary 2 is provided with a secondary permanent magnet 2-1, the magnetization direction of the secondary permanent magnet 2-1 is perpendicular to the direction of motion, and the adjacent two secondary The magnetization direction of the permanent magnet 2-1 is opposite;

The number of pole pairs of the secondary permanent magnet 2-1 is P,

The number of air gap side slots of the primary core 1-1 is Q,

The number of pole pairs of the fundamental magnetomotive force of the primary winding 1-2 is S, and the relationship between P, Q and S satisfies the following relationship:

P=Q±S,

2Pτ _p = Qτ _t ,

Q=2mkq,

Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding.

This embodiment is a unilateral structure, which forms a closed magnetic circuit with the primary-winding-air gap-permanent magnet-secondary-permanent magnet-air gap-primary. Since specific embodiments 1 to 6 are natural cooling structures, the current density is limited to a certain extent. , and this embodiment can add another cooling device to increase the current density to increase the thrust density of the motor, thereby obtaining greater thrust.

Specific Embodiment Ninth: Refer to Fig. 2 to Fig. 8 and Fig. 21 to Fig. 27 to illustrate this embodiment mode. The primary iron core 1-1 described above is a square block.

Embodiment 10: Refer to Fig. 9 to Fig. 14 to illustrate this embodiment. The difference between this embodiment and the annular winding magnetic field modulation linear motor described in Embodiment 3 or 4 is that the main primary core 1-1 is square blocks.

Claims (10)

1. A linear motor with ring winding magnetic field modulation, characterized in that it includes a primary (1) and a secondary (2), and there is an air gap between the two, The secondary (2) is a bilateral structure, and the primary (1) is arranged between the two sides, and the secondary permanent magnet (2-1) is arranged on the air gap side of the bilateral structure, and the charging of the secondary permanent magnet (2-1) The magnetic direction is perpendicular to the direction of motion, and the magnetization directions of the two adjacent secondary permanent magnets (2-1) on one side are opposite, and the magnetization directions of the secondary permanent magnets (2-1) at corresponding positions on both sides are the same, The primary (1) includes a primary core (1-1) and a primary winding (1-2), and the primary slots are longitudinally opened on the left and right air gap sides of the primary core (1-1), and the primary windings are arranged in the slots (1-2), the primary winding (1-2) is implemented by a ring winding, and is in the form of a three-phase symmetrical winding; The number of pole pairs of the secondary permanent magnet (2-1) on the unilateral secondary (2) is P, and in the left and right air gap sides of the primary core (1-1), each air gap side slot The number is Q, The number of pole pairs of the fundamental magnetomotive force of the primary winding (1-2) is S, and the relationship between P, Q and S satisfies the following relationship: P=Q±S, 2Pτ _p = Qτ _t , Q=2mkq, Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding. 2. The magnetic field modulation linear motor with ring winding is characterized in that it includes a primary (1) and a secondary (2), and there is an air gap between the two; The secondary (2) is a "concave" three-sided structure, and the primary (1) is set in the groove of the "concave" three-sided structure, and the air gap side of the "concave" three-sided structure is provided with a secondary permanent Magnet (2-1), the magnetization direction of the secondary permanent magnet (2-1) is perpendicular to the direction of motion, and the magnetization direction of two adjacent secondary permanent magnets (2-1) on one side is opposite, three The magnetization directions of the secondary permanent magnets (2-1) at corresponding positions on the side are the same; The primary (1) includes a primary core (1-1) and a primary winding (1-2). Primary slots are longitudinally opened on the left and right air gap sides of the primary core (1-1). 1) The lower air gap side has primary slots along the transverse direction, and the slots on the three air gap sides are connected to jointly set the primary winding (1-2). The primary winding (1-2) is realized by ring winding and is three-phase Symmetrical winding form; The number of pole pairs of the unilateral secondary permanent magnet (2-1) is P, The number of side slots for each air gap in the primary core (1-1) is Q, The number of pole pairs of the fundamental magnetomotive force of the primary winding (1-2) is S, and the relationship between P, Q and S satisfies the following relationship: P=Q±S, 2Pτ _p = Qτ _t , Q=2mkq, Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding. 3. The magnetic field modulation linear motor with ring winding is characterized in that it includes a primary (1) and a secondary (2), and there is an air gap between the two; The primary (1) consists of the main primary core (1-1), the primary winding (1-2) and two auxiliary primary cores (1-3); the two auxiliary primary cores (1-3) are located on the main primary core (1- 1) On both sides of the main primary core (1-1), primary slots are longitudinally opened on the left and right air gap sides, and primary windings (1-2) are arranged in the slots, and the primary windings (1-2 ) is realized by annular winding, and is a three-phase symmetrical winding form; The secondary (2) is a double-sided structure, and the two sides are respectively located between the main primary core (1-1) and the two auxiliary primary cores (1-3), each side of the secondary (2) is embedded with a secondary permanent The magnet (2-1), the secondary permanent magnet (2-1) faces the main primary core (1-1) and the auxiliary primary core (1-3) at the same time, the magnetization of the secondary permanent magnet (2-1) The direction is perpendicular to the direction of motion, and the magnetization directions of the two adjacent secondary permanent magnets (2-1) on each side are opposite, and the magnetization directions of the secondary permanent magnets (2-1) at the corresponding positions on both sides are the same; The auxiliary primary iron core (1-3) is a square block, and the air gap side of the auxiliary primary iron core (1-3) is provided with primary slots along the longitudinal direction, and the primary slots are connected with the air gap side of the main primary iron core (1-1). The primary slots are the same; The number of pole pairs of the secondary permanent magnet (2-1) on the unilateral secondary (2) is P, The number of side slots for each air gap of the main primary core (1-1) is Q, The number of pole pairs of the fundamental magnetomotive force of the primary winding (1-2) is S, and the relationship between P, Q and S satisfies the following relationship: P=Q±S, 2Pτ _p = Qτ _t , Q=2mkq, Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding. 4. The ring winding magnetic field modulation linear motor according to claim 3, characterized in that the primary winding (1-2) is embedded in the primary slot opened on the air gap side of the auxiliary primary core (1-3), The primary winding (1-2) is realized by a ring winding, and is in the form of a three-phase symmetrical winding. 5. The ring-winding magnetic field modulation linear motor is characterized in that it includes a primary (1) and a secondary (2), the secondary (2) is located inside the primary (1), and the two are coaxial and have an air gap; The primary (1) includes a primary iron core (1-1) and a primary winding (1-2), the primary iron core (1-1) is a cylindrical structure, and the primary iron core (1-1) is opened along the circumferential direction on the inner surface of the primary iron core (1-1). Slots, each primary slot is evenly arranged along the direction of motion, and primary windings (1-2) are embedded in the primary slots, the primary windings (1-2) are realized by ring windings, and are in the form of three-phase symmetrical windings; The secondary (2) is a cylindrical or cylindrical structure, and its outer surface is pasted with a circular secondary permanent magnet (2-1), and the magnetization direction and movement direction of the circular secondary permanent magnet (2-1) vertical, and the magnetization directions of the adjacent two annular secondary permanent magnets (2-1) are opposite, The number of pole pairs of the annular secondary permanent magnet (2-1) is P, The number of slots on the air gap side of the primary core (1-1) is Q, The number of pole pairs of the fundamental magnetomotive force of the primary winding (1-2) is S, and the relationship between P, Q and S satisfies the following relationship: P=Q±S, 2Pτ _p = Qτ _t , Q=2mkq, Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding. 6. The ring-winding magnetic field modulation linear motor is characterized in that it includes a primary (1) and a secondary (2), the primary (1) is located inside the secondary (2), the two are coaxial, and there is an air gap; The primary (1) includes a primary iron core (1-1) and a primary winding (1-2), the primary iron core (1-1) is a cylindrical or cylindrical structure, and the outer surface of the primary iron core (1-1) is opened along the circumferential direction. primary slots, each primary slot is uniformly arranged along the movement direction, and primary windings (1-2) are embedded in the primary slots, and the primary windings (1-2) are realized by ring windings, and are in the form of three-phase symmetrical windings; The secondary (2) is a cylindrical structure, the inner surface of the secondary (2) is pasted with a circular secondary permanent magnet (2-1), and the magnetization direction of the circular secondary permanent magnet (2-1) perpendicular to the direction of motion, and the directions of magnetization of the two adjacent circular secondary permanent magnets (2-1) are opposite; The number of pole pairs of the annular secondary permanent magnet (2-1) is P, The number of slots on the outer surface of the primary core (1-1) is Q, The number of pole pairs of the fundamental magnetomotive force of the primary winding (1-2) is S, and the relationship between P, Q and S satisfies the following relationship: P=Q±S, 2Pτ _p = Qτ _t , Q=2mkq, Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding. 7. A linear motor with ring winding magnetic field modulation, characterized in that it includes a primary (1) and a secondary (2), the primary (1) is located above the secondary (2), and there is an air gap between them; The primary (1) includes a primary iron core (1-1) and a primary winding (1-2), and a primary slot is opened transversely on the air gap side of the primary iron core (1-1), and the primary winding (1-2) is arranged in the slot , the primary winding (1-2) is realized by a ring winding, and is in the form of a three-phase symmetrical winding; The secondary (2) is a unilateral structure, and the air gap side of the secondary (2) is provided with a secondary permanent magnet (2-1), and the magnetization direction of the secondary permanent magnet (2-1) is perpendicular to the moving direction, And the magnetization directions of the adjacent two secondary permanent magnets (2-1) are opposite; The number of pole pairs of the secondary permanent magnet (2-1) is P, The number of slots on the air gap side of the primary core (1-1) is Q, The number of pole pairs of the fundamental magnetomotive force of the primary winding (1-2) is S, and the relationship between P, Q and S satisfies the following relationship: P=Q±S, 2Pτ _p = Qτ _t , Q=2mkq, Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding. 8. A linear motor with ring winding magnetic field modulation, characterized in that it includes a primary (1) and a secondary (2), the primary (1) is located above the secondary (2), and there is an air gap between them; The primary (1) includes a primary core (1-1) and a primary winding (1-2), primary slots are opened transversely on the upper and lower surfaces of the primary core (1-1), and a primary slot is embedded in each primary slot Windings (1-2), the primary windings (1-2) are realized by annular windings, and are in the form of three-phase symmetrical windings; The secondary (2) is a unilateral structure, and the air gap side of the secondary (2) is provided with a secondary permanent magnet (2-1), and the magnetization direction of the secondary permanent magnet (2-1) is perpendicular to the moving direction, And the magnetization directions of the adjacent two secondary permanent magnets (2-1) are opposite; The number of pole pairs of the secondary permanent magnet (2-1) is P, The number of slots on the air gap side of the primary core (1-1) is Q, The number of pole pairs of the fundamental magnetomotive force of the primary winding (1-2) is S, and the relationship between P, Q and S satisfies the following relationship: P=Q±S, 2Pτ _p = Qτ _t , Q=2mkq, Among them, τ _p is the pole pitch of the secondary permanent magnet, τ _t is the tooth pitch of the primary iron core, m is the phase number of the primary winding, k is a positive integer, and q is the number of slots per pole and phase of the primary winding. 9. The linear motor with ring winding magnetic field modulation according to claim 1, 2, 7 or 8, characterized in that the primary iron core (1-1) is a square block. 10. The linear motor with ring winding magnetic field modulation according to claim 3 or 4, characterized in that the main primary core (1-1) is a square block.