阅读说明：本技术 一种双定子扁平型单相交流永磁直线电机 (Flat type single phase alternating current permanent magnet linear motor of two stators ) 是由 徐照平 孙晔 刘梁 于 2019-11-13 设计创作，主要内容包括：本发明公开了一种双定子扁平型单相交流永磁直线电机,包括支撑组件、设置在支撑组件内的动子组件,对称设置在支撑组件两侧的定子组件；所述动子组件包括动子支架和固定在动子支架上的两个永磁体；所述两个永磁体的充磁方向相反,分别朝向两个定子组件；所述动子组件可在支撑组件内水平滑动；滑动方向垂直于永磁体的充磁方向；所述定子组件包括电枢绕组,线圈骨架和定子铁芯；所述定子铁芯的两端设有线圈骨架；所述枢绕组缠绕在线圈骨架和定子铁芯的内侧；所述定子铁芯与永磁体之间设有间隙；本发明的直线电机可用于自由活塞发电、振荡发电等高速往复直线发电场合,具有磁阻力低,功率密度大,损耗低,效率高的优点。(The invention discloses a double-stator flat type single-phase alternating current permanent magnet linear motor which comprises a supporting component, a rotor component and stator components, wherein the rotor component is arranged in the supporting component; the rotor assembly comprises a rotor support and two permanent magnets fixed on the rotor support; the magnetizing directions of the two permanent magnets are opposite and respectively face the two stator assemblies; the rotor assembly can horizontally slide in the support assembly; the sliding direction is vertical to the magnetizing direction of the permanent magnet; the stator assembly comprises an armature winding, a coil framework and a stator iron core; coil frameworks are arranged at two ends of the stator core; the pivot winding is wound on the inner sides of the coil framework and the stator iron core; a gap is formed between the stator iron core and the permanent magnet; the linear motor can be used for high-speed reciprocating linear power generation occasions such as free piston power generation, oscillation power generation and the like, and has the advantages of low magnetic resistance, high power density, low loss and high efficiency.)

1. A double-stator flat single-phase alternating current permanent magnet linear motor is characterized by comprising a supporting component, a rotor component arranged in the supporting component and stator components symmetrically arranged on two sides of the supporting component;

the rotor assembly comprises a rotor support (9) and two permanent magnets (6) fixed on the rotor support (9); the magnetizing directions of the two permanent magnets (6) are opposite and respectively face the two stator assemblies; the rotor assembly can horizontally slide in the support assembly; the sliding direction is vertical to the magnetizing direction of the permanent magnet (6);

the stator assembly comprises an armature winding (1), a coil framework (2) and a stator iron core (3); coil frameworks (2) are arranged at two ends of the stator iron core (3); the armature winding (1) is wound on the inner sides of the coil framework (2) and the stator iron core (3);

and a gap is arranged between the stator core (3) and the permanent magnet (6).

2. The double-stator flat type single-phase alternating current permanent magnet linear motor according to claim 1, wherein two slide rails (8) are symmetrically arranged in the support assembly; sliding bearings (7) are respectively fixed on two sides of the rotor support (9); the sliding bearing (7) is matched with the sliding rail (8) on the corresponding side and can slide along the sliding rail (8).

3. The double-stator flat type single-phase alternating current permanent magnet linear motor according to claim 1, wherein the stator core (3) is a one-piece solid core.

4. The double-stator flat type single-phase alternating current permanent magnet linear motor according to claim 1, wherein the stator core (3) is formed by radially laminating a plurality of silicon steel sheets along the slide rail (8), and the laminating direction is perpendicular to the sliding direction of the rotor assembly.

5. The double-stator flat type single-phase alternating current permanent magnet linear motor according to claim 1, wherein the coil bobbin (2) and the stator core (3) are in a chevron structure, two half-closed slots (10) are formed in the chevron structure, and the armature winding (1) is wound in the coil bobbin (2) and the stator core (3) through the half-closed slots.

6. The double-stator flat type single-phase alternating current permanent magnet linear motor according to claim 1, wherein the support assembly comprises a motor bracket (5), a stator bracket (4); two stator supports (4) are fixed on two sides of the motor support (5); the stator support (4) is provided with a mounting groove (41) for clamping the stator core (3).

7. The double-stator flat type single-phase alternating current permanent magnet linear motor according to claim 1, wherein the mover holder (9) is made of a non-magnetic material.

8. The twin stator flat single phase ac permanent magnet linear motor of claim 1 in open configuration without a housing.

Technical Field

The invention belongs to the field of linear motors, and particularly relates to a double-stator flat type single-phase alternating current permanent magnet linear motor.

Background

The linear motor can be considered to be formed by conveniently converting and developing the structure of the rotary motor, and can be considered as that one rotary motor is cut along the radial direction, and then the circumference of the motor is stretched into a straight line. This results in the original linear motor evolved from a rotary motor. The side from which the stator of the rotating machine evolves is called the primary side and the side from which the rotor of the rotating machine evolves is called the secondary side. The radial direction, the circumferential direction and the axial direction of the rotating motor respectively correspond to the normal direction, the longitudinal direction and the transverse direction of the linear motor. A moving part of the linear motor may be referred to as a mover, and a stationary part may be referred to as a stator.

The linear motor can be used as a motor to realize conversion of electric energy into mechanical energy, and can also be used as a generator to realize conversion of mechanical energy into electric energy. A linear motor is an electromechanical device that directly converts electric energy into linear kinetic energy, and is also generally called a direct drive device. The linear generator is a device for directly converting kinetic energy of linear motion into electric energy, the form of the linear motion is visible everywhere in the world, and the linear generator has the most prominent advantage of being capable of directly utilizing the linear kinetic energy without an intermediate conversion link, so that the linear generator can promote a revolution in the aspects of energy conversion and utilization.

Chinese patent CN109617361A discloses a single-phase ac permanent-magnet synchronous linear generator, because when the mover assembly moves to one side, one of the three coils is in a waste working state, and unnecessary copper loss is generated at the same time, resulting in low power generation efficiency. The pole shoe of the generator is small in size, so that the magnetic resistance of the generator is large, the installation is difficult, and the operation vibration is large. Meanwhile, the generator only depends on the radiating holes at the end cover for radiating, and radiating conditions are poor.

Disclosure of Invention

The invention aims to provide a double-stator flat type single-phase alternating current permanent magnet linear motor which has the advantages of low loss, high power density, low magnetic resistance, good heat dissipation condition and the like on the premise of meeting the power generation efficiency and power generation power.

The technical solution for realizing the purpose of the invention is as follows:

a double-stator flat type single-phase alternating current permanent magnet linear motor comprises a supporting component, a rotor component arranged in the supporting component and stator components symmetrically arranged on two sides of the supporting component;

the rotor assembly comprises a rotor support and two permanent magnets fixed on the rotor support; the magnetizing directions of the two permanent magnets are opposite and respectively face the two stator assemblies; the rotor assembly can horizontally slide in the support assembly; the sliding direction is vertical to the magnetizing direction of the permanent magnet;

the stator assembly comprises an armature winding, a coil framework and a stator iron core; coil frameworks are arranged at two ends of the stator core; the armature winding is wound on the inner sides of the coil framework and the stator iron core;

and a gap is arranged between the stator iron core and the permanent magnet.

Compared with the prior art, the invention has the following remarkable advantages:

(1) the technical scheme is combined: the stator core is formed by laminating a plurality of silicon steel sheets, and the laminating direction is perpendicular to the sliding direction of the rotor assembly. The eddy current loss of the stator core can be reduced.

(2) The stator cores on the two sides form a common magnetic circuit, the permanent magnets are fully utilized, and when the rotor assembly moves, the magnetic circuit of the whole motor is in a communicated state, so that the magnetic resistance of the motor is reduced.

(3) By using an open structure without a housing, the motor can be realized under good heat dissipation conditions.

Drawings

Fig. 1 is a schematic overall three-dimensional structure diagram of a double-stator flat single-phase alternating-current permanent magnet linear generator according to the invention.

Fig. 2 is a schematic diagram of a coil framework structure of a double-stator flat single-phase alternating-current permanent magnet linear generator.

Fig. 3 is a schematic structural diagram of a stator core of a double-stator flat single-phase alternating-current permanent magnet linear generator according to the invention.

Fig. 4 is a schematic diagram of the structure and magnetic circuit of the double-stator flat single-phase ac permanent magnet linear generator according to the present invention.

Fig. 5 is a thrust characteristic diagram of the double-stator flat type single-phase ac permanent magnet linear generator according to the present invention.

In the figure, 1, armature winding 2, coil skeleton 3, stator core 4, stator support 5, motor support 6, permanent magnet 7, sliding bearing 8, sliding rail 9, rotor support 10, semi-closed slot 41 and mounting slot.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

With reference to fig. 1, the double-stator flat single-phase ac permanent magnet linear motor of the present invention includes a supporting assembly, a mover assembly disposed in the supporting assembly, and stator assemblies symmetrically disposed at two sides of the supporting assembly;

the rotor assembly comprises a rotor support 9 and two permanent magnets 6 fixed on the rotor support 9; the magnetizing directions of the two permanent magnets 6 are opposite and face the two stator assemblies respectively; two sliding rails 8 are symmetrically arranged in the supporting component; sliding bearings 7 are respectively fixed on two sides of the rotor support 9; the sliding bearing 7 is matched with the sliding rail 8 at the corresponding side and can slide along the sliding rail 8; the sliding direction of the mover assembly is perpendicular to the magnetizing direction of the permanent magnet 6.

The stator assembly comprises an armature winding 1, a coil framework 2 and a stator iron core 3; coil frameworks 2 are arranged at two ends of the stator core 3; the armature winding 1 is wound on the inner sides of the coil frame 2 and the stator iron core 3;

and a gap is arranged between the stator core 3 and the permanent magnet 6.

As an embodiment, the stator core 3 is a one-piece solid core.

Preferably, the stator core 3 is formed by laminating a plurality of silicon steel sheets, and the laminating direction is perpendicular to the sliding direction of the mover assembly.

Further, the coil frame 2 and the stator core 3 are both in a chevron structure, two half-closed slots 10 are arranged on the chevron structure, and the armature winding 1 is wound in the coil frame 2 and the stator core 3 through the half-closed slots.

Further, the supporting assembly comprises a motor bracket 5 and a stator bracket 4; two stator brackets 4 are fixed on two sides of the motor bracket 5; the stator frame 4 is provided with mounting slots 41 for snap-fitting into the stator core 3. The permanent magnet 6 with because there is magnetic force absorption between the stator core 3, stator module direct absorption need not bolted connection in the mounting groove 41 of stator support 4. While the stator core 3 is separated from the permanent magnet 6 by a gap by the stator frame 4.

The mover support 9 is made of stainless steel or other non-magnetic materials. The rotor support 9 and the permanent magnet 6 are in interference fit, the linear generator is of an open structure, a shell does not need to be installed, and the heat dissipation condition is good.

As can be seen from fig. 4, the stator cores on both sides form a common magnetic circuit, the permanent magnets are fully utilized, and when the mover assembly moves, the magnetic circuit of the whole motor is in a communicated state, so that the magnetic resistance of the motor is reduced.

The two armature windings 1 are connected in parallel or in series, and are a single-phase generator. The generator can be used as a generator or a motor.

As can be seen from fig. 5, as the armature winding current increases, the thrust force applied to the mover also increases. When the current of the armature winding 1 is 0A, the reluctance force of the linear generator is close to 0 within the displacement range of +/-15 mm of the rotor assembly, and the reluctance force of not more than 100N is generated only within the displacement range of +/-15-20 mm of the rotor assembly, so that the rotor assembly can be prevented from impacting the motor support 5.