CN106787547B - An Axial Flux Two-Phase Double Salient Permanent Magnet Motor - Google Patents

Abstract

The invention discloses an axial flux two-phase double-salient pole permanent magnet motor. The technical problem to be solved is: the existing motor system mentioned in the background technology has the disadvantages of too complicated structure and high energy consumption. The technical solution adopted is: an axial flux two-phase double salient pole permanent magnet motor, including a stator sleeve, a stator disc A, a stator salient pole A, an armature winding A, a permanent magnet ring, an armature winding B, Stator salient pole B, rotating shaft, rotor core and stator disk B. The axial magnetic flux two-phase double salient pole permanent magnet motor of the present invention has high efficiency, high power density, simple and novel structure.

Description

An Axial Flux Two-Phase Double Salient Permanent Magnet Motor

technical field

The invention relates to a motor, in particular to an axial magnetic flux two-phase double-salient pole permanent magnet motor, which belongs to the technical field of motors.

Background technique

The doubly salient motor is a new structure motor proposed in the 1950s. It has received widespread attention and in-depth research since the 1990s. It has the advantages of simple and firm structure, convenient manufacture, reliable operation, and easy maintenance. It has a good application prospect in wind power generation occasions.

The double salient pole motor belongs to the variable reluctance motor, and the variable reluctance motor includes two types of unilateral salient pole and double salient pole. Pole motors are more favored by researchers. A typical variable reluctance motor uses the unequal reluctance, and the magnetic flux always concentrates on the route with small reluctance. When working as a motor, the energized stator winding attracts the ferromagnetic rotor with magnetic force, so that the magnetic force generates a tangential component force, that is produces torque on the rotor. The energization sequence of the stator is energized according to the position of the rotor detected by the position sensor, which is most conducive to generating forward torque for the rotor. One phase is energized. The control system constantly changes the energized phase sequence of the stator winding, so that the rotor continues to rotate in one direction.

Variable reluctance motors include switched reluctance motors, stepper motors, and double salient pole motors, and double salient pole motors include permanent magnet double salient pole motors, electrically excited double salient pole motors, and flux reversal double salient pole motors. and flux switching doubly salient motors. A switched reluctance motor (SRM) is different from a stepper motor. It is a self-synchronous motor with position feedback, and its speed is determined by the drive torque of the motor and the resistance torque of the load. The stepper motor works in an open loop, and its speed is determined by the pulse frequency. The switched reluctance motor has a simple rotor structure. The rotor is made of laminated silicon steel sheets. There are no coils and magnetic steel on the rotor. It is suitable for working at high temperature and high speed. It has been researched in the field of aviation electrical, but the switched reluctance motor Always work with the power converter, making its power generation work complicated and unreliable.

In order to avoid potential failures caused by the disadvantages of switched reluctance motors during operation, researchers installed permanent magnets in the structure of switched reluctance motors to form a double salient permanent magnet motor (DSPM). When the pole arc length of the stator and rotor satisfies a certain relationship, the total air gap permeance of the doubly salient motor is a constant value. At this time, the working point of the permanent magnet will not change with the rotation of the rotor, so the doubly salient motor has no positioning torque at rest , the interlinkage flux on the doubly salient motor winding is only proportional to the permeance. Permanent magnets with high coercive force and low permeability are placed in the stator of the doubly salient motor, so the reluctance of the magnetic circuit of the doubly salient motor is large, and the winding inductance is small, so that the current commutation can be completed quickly. In addition, when the doubly salient motor works, the flux linkage and magnetomotive force generated by the armature reaction are much smaller than those generated by the permanent magnet, so the synthetic flux linkage is mainly determined by the permanent magnet. The armature reaction of the switched reluctance motor is completely determined by the armature current, and its winding current is much larger than that of the doubly salient permanent magnet motor, so the doubly salient permanent magnet motor generates less heat and noise when it works.

Contents of the invention

The technical problem to be solved by the present invention is: aiming at the shortcomings of the existing motor system mentioned in the background art that the structure is too complex and its own energy consumption is large.

The purpose of the present invention is to propose a novel axial flux two-phase double-salient pole permanent magnet motor with high efficiency, high power density, simple structure and novelty.

In order to solve the problems of the technologies described above, the technical scheme that the present invention takes is:

An axial flux two-phase double-salient permanent magnet motor, including a stator sleeve, a stator disc A, a stator salient pole A, an armature winding A, a permanent magnet ring, an armature winding B, a stator salient pole B, and a rotating shaft , rotor core and stator disc B;

The magnetization direction of the permanent magnet ring is axial magnetization. The permanent magnet ring is embedded in the stator sleeve. The permanent magnet ring is located in the middle of the axial length of the stator sleeve and divides the stator sleeve into upper stator sleeve and lower stator sleeve. sub-sleeve;

The stator disk A and the stator disk B are respectively arranged at the two ends of the stator sleeve and located inside the stator sleeve, and the stator disk A, the stator disk B and the stator sleeve form the rotor cavity;

On the plane of the stator disk A facing the rotor cavity, there are four sector-shaped stator salient poles A, and armature windings A are arranged on the four sector-shaped stator salient poles A;

On the plane of the stator disk B facing the rotor cavity, there are four sector-shaped stator salient poles B protruding, and armature windings B are arranged on the four sector-shaped stator salient poles B;

The upper and lower positions of the four sector-shaped stator salient poles A and the four sector-shaped stator salient poles B are set in one-to-one correspondence;

The rotor core is installed on the rotating shaft and located in the rotor cavity; the rotor core includes a ring sleeve that is set on the rotating shaft and rotates with the rotating shaft, and three fan-shaped rotor salient poles are uniformly protruded radially on the outer surface of the ring sleeve ; The three sector-shaped rotor salient poles are located between the four sector-shaped stator salient poles A and the four sector-shaped stator salient poles B, and there is a first air gap between the three sector-shaped rotor salient poles and the four sector-shaped stator salient poles A. There is a second air gap between the four fan-shaped rotor salient poles and the four fan-shaped stator salient poles B;

The sector angles, major diameters and minor diameters of the four sector-shaped stator salient poles A, the four sector-shaped stator salient poles B and the three sector-shaped rotor salient poles are the same.

The axial flux two-phase double salient pole permanent magnet motor of the present invention, the two opposite windings in the armature winding A constitute one phase, the two opposite windings in the armature winding B constitute one phase, the armature winding A and the armature The opposing windings of winding B form a phase.

The axial flux two-phase double-salient pole permanent magnet motor of the present invention has at least three salient poles of the rotor iron core, which is lower than the existing technical solution, and is beneficial to reduce iron loss and lighten the burden on the controller.

As an improvement to the technical solution of the present invention, the minor diameter of the sector-shaped stator salient pole A is the same as the radius of the inner hole of the stator disk A, and the minor diameter of the sector-shaped stator salient pole B is the same as the radius of the inner hole of the stator disk B.

As an improvement to the technical solution of the present invention, the first air gap is equal to the second air gap, so that the entire motor has a symmetrical structure up and down.

Beneficial effect

The beneficial effect of the present invention compared with prior art:

1. The axial flux two-phase double-salient permanent magnet motor of the present invention has high efficiency, high power density, and simple and novel structure.

2. The axial magnetic flux two-phase double-salient pole permanent magnet motor of the present invention adopts permanent magnets to establish an excitation magnetic field, which can reduce the copper consumption of the motor and improve the efficiency of the motor.

Description of drawings

Fig. 1 is a structural sectional view of the present invention.

Fig. 2 is a schematic diagram of the installation position of the rotor core and the rotating shaft.

FIG. 3 is a schematic structural diagram of a salient pole A of the stator.

Among them, 1. Stator sleeve; 2. Stator disk A; 3. Stator salient pole A; 31. Sector-shaped stator salient pole A; 4. Armature winding A; 5. Permanent magnetic ring; 6. Armature winding B; 7. Stator salient pole B; 8. Rotary shaft; 9. Rotor core; 91. Ring sleeve; 92. Sector-shaped rotor salient pole; 10. Stator disk B.

Detailed ways

In order to make the content of the present invention more obvious and understandable, a further description will be made below in conjunction with the accompanying drawings 1-3 and specific implementation methods.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1, the axial flux two-phase double salient pole permanent magnet motor of the present invention includes a stator sleeve 1, a stator disc A2, a stator salient pole A3, an armature winding A4, a permanent magnet ring 5, and an armature Winding B6, stator salient pole B7, rotating shaft 8, rotor core 9 and stator disc B10.

The stator salient pole A3 is composed of four sector-shaped stator salient poles A31 (see FIG. 3 ), and the stator salient pole B7 is composed of four sector-shaped stator salient poles B.

The magnetization direction of the permanent magnet ring 5 is axial magnetization. The permanent magnet ring 5 is embedded in the stator sleeve 1. The permanent magnet ring is located in the middle of the axial length of the stator sleeve and divides the stator sleeve into upper stator sleeves. barrel and lower stator sleeve.

The stator disk A2 and the stator disk B10 are respectively arranged at the two ends of the stator sleeve and located inside the stator sleeve. The stator disk A2, the stator disk B10 and the stator sleeve 1 form a rotor chamber.

On the plane of the stator disc A2 facing the rotor cavity, there are four sector-shaped stator salient poles A, and armature windings A4 are arranged on the four sector-shaped stator salient poles A; on the plane of the stator disc B10 facing the rotor cavity, there are protrusions There are four sector-shaped stator salient poles B, and armature windings B6 are arranged on the four sector-shaped stator salient poles B.

The upper and lower positions of the four sector-shaped stator salient poles A and the four sector-shaped stator salient poles B are set in one-to-one correspondence.

The rotor core 9 is installed on the rotating shaft 8 and is located in the rotor cavity; the rotor core includes a ring sleeve 91 which is set on the rotating shaft and rotates with the rotating shaft, and three fan-shaped rings are uniformly protruded outward in the radial direction on the outer surface of the ring sleeve. The rotor salient poles 92; the three sector-shaped rotor salient poles are located between the four sector-shaped stator salient poles A and the four sector-shaped stator salient poles B, and the first Air gap, there is a second air gap between the three sector-shaped rotor salient poles and the four sector-shaped stator salient poles B; see Figure 2.

The sector angles, major diameters and minor diameters of the four sector-shaped stator salient poles A, the four sector-shaped stator salient poles B and the three sector-shaped rotor salient poles are the same.

In this axial flux two-phase double-salient pole permanent magnet motor, the axially magnetized permanent magnet ring 5 is embedded in the middle of the stator sleeve 1 to provide an excitation magnetic field for the motor; the armature winding A4 and the armature winding B6 respectively wind On the stator salient pole A3 and the stator salient pole B7, the motor is connected to the electric load when it is generating electricity, and it is connected to the power supply when it is electric.

The two opposite windings in the armature winding A4 form a phase, the two opposite windings in the armature winding B6 form a phase, the upper and lower windings of the armature winding A4 and the armature winding B6 form a phase, and the whole motor has a total of two phases winding.

The working principle of this embodiment:

When the present invention operates as a generator, the prime mover drives the rotating shaft 8 and the rotor iron core 9 to rotate. Due to the existence of the salient poles of the rotor iron core on the rotor iron core 9, the rotation of the rotor iron core 9 will cause the motor armature winding A4, armature The magnitude of the magnetic flux of the winding B6 changes, thereby inducing an electromotive force in the motor armature winding A4 and armature winding B6, and the magnitude of the induced electromotive force is related to the rotor speed.

When the present invention operates as a motor, according to the position of the rotor iron core 9, the forward or reverse current can be passed into the two-phase winding composed of the armature winding A4 and the armature winding B6 to generate torque, and the two The phase currents are out of phase by 90°.

The parts not involved in the present invention are all communicated with the prior art or implemented by adopting the prior art.

All that are not specifically described in the description of the present invention are existing technologies or can be realized through existing technologies. It should be understood that those skilled in the art can improve or transform according to the above description, and all these improvements All changes and transformations should belong to the scope of protection of the appended claims of the present invention.

Claims (3)

1. An axial flux two-phase double-salient pole permanent magnet motor is characterized in that: it comprises a stator sleeve, a stator disc A, a stator salient pole A, an armature winding A, a permanent magnet ring, an armature winding B, Stator salient pole B, rotating shaft, rotor core and stator disc B; The magnetization direction of the permanent magnet ring is axial magnetization. The permanent magnet ring is embedded in the stator sleeve. The permanent magnet ring is located in the middle of the axial length of the stator sleeve and divides the stator sleeve into upper stator sleeve and lower stator sleeve. sub-sleeve; The stator disk A and the stator disk B are respectively arranged at the two ends of the stator sleeve and located inside the stator sleeve, and the stator disk A, the stator disk B and the stator sleeve form the rotor chamber; On the plane of the stator disk A facing the rotor cavity, there are four sector-shaped stator salient poles A, and armature windings A are arranged on the four sector-shaped stator salient poles A; On the plane of the stator disk B facing the rotor cavity, there are four sector-shaped stator salient poles B protruding, and armature windings B are arranged on the four sector-shaped stator salient poles B; The upper and lower positions of the four sector-shaped stator salient poles A and the four sector-shaped stator salient poles B are set in one-to-one correspondence; The rotor core is installed on the rotating shaft and located in the rotor cavity; the rotor core includes a ring sleeve that is set on the rotating shaft and rotates with the rotating shaft, and three fan-shaped rotor salient poles are uniformly protruded radially on the outer surface of the ring sleeve ; The three sector-shaped rotor salient poles are located between the four sector-shaped stator salient poles A and the four sector-shaped stator salient poles B, and there is a first air gap between the three sector-shaped rotor salient poles and the four sector-shaped stator salient poles A. There is a second air gap between the four fan-shaped rotor salient poles and the four fan-shaped stator salient poles B; The sector angles, major diameters and minor diameters of the four sector-shaped stator salient poles A, the four sector-shaped stator salient poles B and the three sector-shaped rotor salient poles are the same. 2. The axial flux two-phase double salient pole permanent magnet motor according to claim 1, characterized in that: the minor diameter of the sector-shaped stator salient pole A is the same as the radius of the inner hole of the stator disk A, and the sector-shaped stator salient pole B The minor diameter is the same as the radius of the inner hole of the stator disk B. 3. The axial flux two-phase double-salient pole permanent magnet motor according to claim 1, wherein the first air gap is equal to the second air gap.