CN107947522A - Cylindrical double-salient-pole permanent magnet linear motor - Google Patents

Abstract

The invention discloses a cylindrical double-salient pole permanent magnet linear motor. The technical problem to be solved is to address the common shortcomings of the current motor system, which are too complex in structure and high in energy consumption, mentioned in the background technology. The technical solution adopted is: a cylindrical double salient pole permanent magnet linear motor, including a mover iron core, a stator iron core A, a stator iron core B, an armature winding A, an armature winding B and an annular permanent magnet. The permanent magnet linear motor of the present invention uses permanent magnets to establish an excitation magnetic field, which can reduce the copper consumption of the motor and improve the efficiency of the motor; adopts the same polarity structure, and the motor has lower iron consumption; the structure is simple, the assembly flexibility is high, and the number of fault maintenance is small , safe and reliable work, with a high service life.

Description

A cylindrical double salient pole permanent magnet linear motor

technical field

The invention relates to a motor, in particular to a cylindrical double salient pole permanent magnet linear motor, which belongs to the technical field of motors.

Background technique

Cylindrical linear motor is a new type of linear motor, which is improved based on the structure of ordinary linear motor. The most basic and typical structure of linear motor is flat structure, which is the most widely used, but its edge effect is obvious, the end winding wastes material and increases resistance loss and end leakage reactance, resulting in low motor efficiency. Compared with flat linear motors, round-through linear motors use coaxial coils to form motor windings, embedded in stator slots, without end windings, which improves winding utilization and eliminates lateral edge effects. In addition, the stress on the bearing of the linear motor is also reduced, which simplifies the manufacturing process of the motor and reduces the manufacturing cost.

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. The polar motor has been favored by researchers more. 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.

Cylindrical doubly salient permanent magnet linear motor is a form of cylindrical linear motor, and its operating principle is consistent with that of doubly salient permanent magnet motor. It combines the advantages of the cylindrical linear motor and the double salient permanent magnet motor, and its structural advantages have attracted more and more people's attention.

Contents of the invention

The technical problem to be solved by the present invention is to address the common shortcomings of the current motor system, which are mentioned in the background art: the structure is too complex and the energy consumption is large.

The object of the present invention is to propose a cylindrical double salient pole permanent magnet linear 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:

A cylindrical double salient pole permanent magnet linear motor, comprising a cylindrical mover iron core, ring-shaped mover salient poles are arranged at equal intervals along the axial direction on the outer surface of the mover iron core, the mover convex The width of the pole is equal to the width of the interval between two adjacent mover salient poles;

On the outer surface of the mover core, set the stator core A, the annular permanent magnet and the stator core B in the axial direction, the annular permanent magnet is located between the stator core A and the stator core B, the stator core A, The outer diameters of the annular permanent magnet and the stator core B are the same;

Two annular stator salient poles A are protrudingly arranged on the inner surface of the stator core A, and a first gap is set between the two annular stator salient poles A and the mover salient pole; the two annular stator salient poles A An annular first tooth slot for installing the armature winding A is arranged between them; the width of the first tooth slot is equal to twice the width of the salient pole A of the stator;

On the inner surface of the stator core B, two annular stator salient poles B are protrudingly arranged, and a second gap is set between the two annular stator salient poles B and the mover salient pole, and the second gap is the same as the first gap. The spacing is equal; a ring-shaped second slot for installing the armature winding B is arranged between the two annular stator salient poles B, and the width of the second slot is equal to the width of the first slot;

The width of stator salient pole A, the width of stator salient pole B and the width of mover salient pole are all equal;

Embedding a pre-wound annular armature winding A in the first slot, and embedding a pre-wound annular armature winding B in the second slot;

The magnetization direction of the annular permanent magnet is axial magnetization.

The pre-wound annular armature winding A mentioned in the technical solution of the present invention, and the pre-wound annular armature winding B, the pre-wound annular armature winding A and the electric The process method of the pivot winding B is a conventional process method in the prior art, and the specific process method will not be described in detail in the present invention.

Beneficial effect

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

1. The cylindrical double salient pole permanent magnet linear motor of the present invention uses permanent magnets to establish an excitation field, which can reduce the copper consumption of the motor and improve the efficiency of the motor.

2. The cylindrical double salient pole permanent magnet linear motor of the present invention adopts the same polarity structure, and the motor has lower iron consumption.

3. The cylindrical double-salient pole permanent magnet linear motor of the present invention has simple structure, high assembly flexibility, less fault maintenance times, safe and reliable operation, and high service life.

Description of drawings

Fig. 1 is a schematic diagram of a three-dimensional structure half section of the motor of the present invention.

Fig. 2 is a two-dimensional structural sectional view of the motor of the present invention.

Detailed ways

In order to make the content of the present invention more obvious and comprehensible, further description will be made below in conjunction with accompanying drawings 1-2 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 Figures 1 and 2, the cylindrical double salient pole permanent magnet linear motor of this embodiment includes a cylindrical mover core 1, which is equally spaced along the axial direction on the outer surface of the mover core 1 The ring-shaped mover salient pole 1-1 is arranged, and the width of the mover salient pole 1-1 is equal to the interval width between two adjacent mover salient poles 1-1;

On the outer surface of the mover core 1, set the stator core A2, the annular permanent magnet 6 and the stator core B3 along the axial direction, the annular permanent magnet 6 is located between the stator core A2 and the stator core B3, and the stator iron The outer diameters of the core A2, the annular permanent magnet 6 and the stator core B3 are the same;

Two annular stator salient poles A2-1 are protrudingly arranged on the inner surface of the stator core A2, and a first gap 7 is provided between the two annular stator salient poles A2-1 and the mover salient pole 1-1; An annular first tooth slot for installing the armature winding A4 is arranged between the two annular stator salient poles A2-1; the width of the first tooth slot is equal to twice the width of the stator salient pole A2-1;

Two annular stator salient poles B3-1 are protrudingly arranged on the inner surface of the stator core B3, and a second gap 8 is provided between the two annular stator salient poles B3-1 and the mover salient pole 1-1, The spacing between the second gap 8 and the first gap 7 is equal; between the two annular salient poles of the stator B3-1, an annular second slot for installing the armature winding B5 is arranged, and the width of the second slot is equal to that of the first slot. the width of the alveolar;

The width of stator salient pole A2-1, the width of stator salient pole B3-1 and the width of mover salient pole 1-1 are all equal;

Embedding a pre-wound annular armature winding A4 in the first slot, and embedding a pre-wound annular armature winding B5 in the second slot;

The magnetization direction of the annular permanent magnet 6 is axial magnetization.

In the cylindrical double salient pole permanent magnet linear motor of this embodiment, the axially magnetized annular permanent magnet 6 is embedded between the stator core A2 and the stator core B3 to provide an excitation magnetic field for the motor. The armature winding A4 is nested between the first slots of the stator core A2, and the armature winding B5 is nested between the second slots of the stator core B3. Connect to the power supply during electric operation; the entire motor has a total of two-phase windings.

The working principle of the permanent magnet linear motor of the present invention:

When the present invention operates as a generator, the prime mover drives the mover iron core 1 to perform a reciprocating linear motion. Due to the existence of the mover salient pole 1-1 on the mover iron core 1, the movement of the mover iron core 1 will cause electric current. The magnetic flux of the armature winding A and the armature winding B of the motor changes, thereby inducing an electromotive force in the armature winding A and the armature winding B of the motor, and the magnitude of the induced electromotive force is related to the moving speed of the mover core 1.

When the present invention is used as a motor, according to the position of the mover iron core 1, the forward or reverse current can be passed into the two-phase winding composed of armature winding A and armature winding B to generate torque. The phase difference of the two phase currents is 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 (1)

1. A cylindrical double salient pole permanent magnet linear motor is characterized in that: it comprises a cylindrical mover iron core (1), which is equally spaced along the axial direction on the outer surface of the mover iron core (1). The ring-shaped mover salient pole (1-1) is arranged, and the width of the mover salient pole (1-1) is equal to the interval width between two adjacent mover salient poles (1-1); Set stator core A (2), ring permanent magnet (6) and stator core B (3) axially on the outer surface of the mover core (1), and the ring permanent magnet (6) is located on the stator iron Between the core A (2) and the stator core B (3), the outer diameters of the stator core A (2), the annular permanent magnet (6) and the stator core B (3) are all the same; Two annular stator salient poles A (2-1) are protrudingly arranged on the inner surface of the stator core A (2), and the two annular stator salient poles A (2-1) are connected with the movable stator salient pole (1 -1) A first gap (7) is set between two ring-shaped salient poles A (2-1) of the stator. A ring-shaped first tooth slot for installing the armature winding A (4) is set between two ring-shaped stator salient poles A (2-1); the first tooth The width of the slot is equal to twice the width of the stator salient pole A (2-1); Two annular stator salient poles B (3-1) are protrudingly arranged on the inner surface of the stator core B (3), and the two annular stator salient poles B (3-1) are connected with the movable stator salient pole (1 -1) A second gap (8) is set between them, and the distance between the second gap (8) and the first gap (7) is equal; between two ring-shaped stator salient poles B (3-1) is set for installing electric an annular second slot of the pivot winding B(5), the width of the second slot is equal to the width of the first slot; The width of stator salient pole A (2-1), the width of stator salient pole B (3-1) and the width of mover salient pole (1-1) are all equal; Embedding a pre-wound annular armature winding A (4) in the first slot, and embedding a pre-wound annular armature winding B (5) in the second slot; The magnetization direction of the annular permanent magnet (6) is axial magnetization.