CN112087117B - A Ω-I Stator Transverse Flux Permanent Magnet Linear Motor - Google Patents

Abstract

The invention discloses an Ω‑I type stator transverse flux permanent magnet linear motor, relates to the field of permanent magnet motors, and comprises an Ω type stator core, an I type stator core, a mover core, a permanent magnet, and a mover made of a non-magnetic material. Bracket, armature winding; the Ω-type stator core and I-type stator core are evenly spaced and staggered in the moving direction of the mover, and share the same armature winding; both sides of the mover core are embedded in the direction of the magnetic pole The opposite permanent magnet is fixed on the non-magnetic material mover bracket; compared with the traditional permanent magnet linear motor, the motor integrates the Ω-type stator core and the I-type stator core on the same armature winding, which greatly improves the The space utilization rate of the motor; the motor circuit and the magnetic circuit are independent of each other and the magnetic field is distributed in three dimensions, which avoids the contradiction of the mutual restriction of the cogging size of the traditional permanent magnet motor, and effectively improves the power density and torque density of the motor.

Description

A Ω-I Stator Transverse Flux Permanent Magnet Linear Motor

technical field

The invention relates to the field of permanent magnet motors, in particular to an Ω-I type stator transverse flux permanent magnet linear motor.

Background technique

With the rapid consumption of traditional fossil fuels, the problem of environmental pollution is becoming more and more serious, which makes people's requirements for energy conversion and the efficiency of equipment and electromechanical systems more stringent. Energy conservation and emission reduction have become an important issue in the energy strategies of various countries. As a highly efficient electromechanical energy conversion device, the motor plays an important role in the national economy.

The stator tooth section and the armature winding slot section of the traditional permanent magnet motor are located on the same plane, and the two restrict each other, resulting in the contradiction between increasing the electric load and increasing the magnetic load and limiting the power increase. The magnetic field of the motor forms a loop through the stator teeth. The larger the cross-sectional area of the stator teeth, the smaller the equivalent reluctance and the lower the hysteresis loss, thereby increasing the magnetic load of the motor. On the premise of a certain volume of the motor, if the tooth section is increased, the slot area must be sacrificed. The reduction of the slot area will lead to a reduction in the section and number of turns of the armature winding, which will reduce the electrical load of the motor.

However, with a transverse flux permanent magnet motor, the direction of rotation of the motor is perpendicular to the plane of the flux, hence the term "transverse flux". The motor stator core is made of silicon steel sheets and adjacent stator cores are separated by a pole pitch. Adjacent permanent magnets on the mover core have opposite polarities, and the armature winding is embedded in the slot of the stator core. The most prominent feature of the transverse flux permanent magnet motor is that its armature winding and the main magnetic circuit are completely decoupled in structure, which cleverly avoids the major defect of the traditional permanent magnet motor's inner iron core and armature cross-section being restricted by each other. Independently adjust the cross-sectional area of the coil and the size of the magnetic circuit to determine the electric and magnetic loads of the motor to obtain higher torque density and power density.

Compared with the current direction of the traditional permanent magnet linear motor, which is perpendicular to the direction of motion, the plane of the closed magnetic force line in the main magnetic circuit is parallel to the motor motion plane, and the current direction of the Ω-I type transverse flux permanent magnet linear motor is parallel to the direction of motion. The plane where the lines of force of the main magnetic circuit are located is perpendicular to the plane of motion of the motor. The Ω-I type transverse flux permanent magnet motor has a complex structure, and the internal magnetic field has a complex three-dimensional distribution, which is in a different plane from the winding. It can take into account the cross-sectional area of the winding and stator teeth at the same time, and realize the decoupling of the circuit and the magnetic circuit. Thereby improving the power density and torque density of the motor. The Ω-I stator structure is convenient for parameter adjustment and is beneficial to the design of multi-phase fault-tolerant motors. The new structure motor has broad application prospects in high torque density direct drive systems.

Contents of the invention

The technical problem to be solved by the present invention is to provide an Ω-I type stator transverse flux permanent magnet linear motor for the problem of complex motor structure in the background technology.

The present invention adopts the following technical solutions for solving the problems of the technologies described above:

An Ω-I type stator transverse flux permanent magnet linear motor, comprising an Ω type stator core, an I type stator core, a mover core, a permanent magnet, an armature winding, and a mover support made of non-magnetic material;

The mover core and the permanent magnet are welded on the mover support made of non-magnetic material. The teeth on both sides of the same Ω-shaped stator core and the I-type stator core correspond to two mover cores respectively. The mover cores adjacent to the same side are 3 Embed permanent magnets in the middle, and ensure that the magnetic poles of the permanent magnets on both sides of the mover core are different, and the magnetic poles of the corresponding permanent magnets on both sides of the same Ω-type stator core and I-type stator core are also different;

When the linear motor operates in three phases, three identical single-phase structures need to be placed in parallel, and the stator and mover of each single-phase structure are staggered by 120 degrees in electrical angle.

As a further optimal solution of the Ω-I type stator transverse flux permanent magnet linear motor of the present invention, the Ω type stator core and the I type stator core are stacked by silicon steel sheets, and are placed in a staggered manner in the front and rear directions of the mover movement , and share the same armature winding;

As a further preferred solution of an Ω-I stator transverse flux permanent magnet linear motor of the present invention, permanent magnets with opposite magnetic pole directions are embedded on both sides of the mover core, and are fixed on the mover bracket of non-magnetic material ;

As a further preferred scheme of a kind of Ω-I type stator transverse flux permanent magnet linear motor of the present invention, what the material of described permanent magnet adopts is RuFeB;

As a further preferred solution of an Ω-I type stator transverse flux permanent magnet linear motor of the present invention, the non-magnetic material mover support is made of steel;

As a further preferred solution of an Ω-I type stator transverse flux permanent magnet linear motor of the present invention, each pair of Ω-I type stator cores is separated by a pole pitch;

As a further preferred solution of the Ω-I stator transverse flux permanent magnet linear motor of the present invention, multiple pairs of Ω-I stator cores are integrated on the armature winding to improve the space utilization and power of the motor.

Compared with the prior art, the present invention adopts the above technical scheme and has the following technical effects:

1. The Ω-I motor mover core and permanent magnets are alternately placed to enhance the magnetic flux density, and the armature winding avoids the inherent end effect of the motor;

2. The winding cross-sectional area and magnetic circuit size of the Ω-I motor are individually adjusted to increase the torque density of the motor while decoupling the phases of each winding, making it easy to build a multi-phase motor;

3. The stator/mover iron core of the motor is laminated with easy-to-obtain and cheap silicon steel sheets, which has low magnetic loss and high economic benefits.

Description of drawings

Fig. 1 is an overall structural diagram of the present invention;

Fig. 2 is a schematic diagram of a pair of pole magnetic fluxes of the present invention;

Fig. 3 is an equivalent magnetic circuit diagram of the present invention;

Fig. 4 is a substructure diagram of the present invention.

Description of drawings: 1. Ω-type stator core; 2. I-type stator core; 3. Mover core; 4. Permanent magnet; 5. Armature winding; 6. Mover support made of non-magnetic material.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figures 1 to 4, an Ω-I type stator transverse flux permanent magnet linear motor includes an Ω type stator core, an I type stator core, a mover core, a permanent magnet, an armature winding, and a non-magnetic material Mover bracket;

The mover core and the permanent magnet are welded on the mover support made of non-magnetic material. The teeth on both sides of the same Ω-shaped stator core and the I-type stator core correspond to two mover cores respectively. The mover cores adjacent to the same side are 3 Embed permanent magnets in the middle, and ensure that the magnetic poles of the permanent magnets on both sides of the mover core are different, and the magnetic poles of the corresponding permanent magnets on both sides of the same Ω-shaped stator core and I-shaped stator core are also different.

Figure 1 shows the single-phase structure of the Ω-I stator transverse flux permanent magnet linear motor. Three identical single-phase structures can constitute a three-phase motor. At the same time, considering the particularity of the armature winding of the motor, the motor is three-phase In phase operation, three identical single-phase structures need to be placed in parallel, and the stator and mover of each single-phase structure are staggered by 120 degrees electrical angle;

The magnetic circuit of a pair of poles of Ω-I stator transverse flux permanent magnet linear motor is shown in Figure 2: the magnetic flux passes through the permanent magnet → mover core → air gap → Ω-type stator core → air gap → permanent magnet → mover Iron core → air gap → I-type stator core → air gap → mover iron core → permanent magnet, forming a closed magnetic circuit. Its equivalent magnetic circuit is shown in Figure 3, and the symbols in the figure are defined as follows: E-permanent magnet magnetic potential, Rm-permanent magnetic reluctance, Rs-a pair of Ω-I stator core reluctance, Rr-mover core magnetism Resistance, Rg-air gap reluctance, Φ-main flux.

The Ω-shaped stator core and the I-shaped stator core are made of silicon steel sheets, placed in staggered rows in the front and rear directions of the mover movement, and share the same armature winding;

Permanent magnets with opposite magnetic pole directions are embedded on both sides of the mover core, and fixed on the mover bracket of non-magnetic material;

The mover core and permanent magnets are alternately placed to form a mover with a magnetic accumulation structure, and the magnetic flux of the stator core turn chain changes periodically with the movement of the mover, thereby generating an electromotive force in the winding;

What the material of described permanent magnet adopts is ferrite boron;

The mover support made of non-magnetic material is made of steel;

Each pair of Ω-I stator cores is separated by a pole pitch.

Multiple pairs of Ω-I stator cores are integrated on the armature winding to improve space utilization and power of the motor.

The last few points should be explained: First, in the description of this application, it should be explained that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, which can be mechanical connection Or electrical connection, it can also be the internal communication of two components, it can be directly connected, "up", "down", "left", "right", etc. are only used to indicate the relative positional relationship, when the absolute position of the object being described Change, the relative positional relationship may change;

Secondly: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, other structures can refer to the usual design, and the same embodiment and different embodiments of the present invention can be combined with each other if there is no conflict;

Finally: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention within the scope of protection.

Claims (7)

1. An Ω-I type stator transverse flux permanent magnet linear motor is characterized in that: it comprises an Ω type stator core, an I type stator core, a mover core, a permanent magnet, an armature winding, and a mover support made of non-magnetic material ; The mover core and permanent magnet are welded on the mover support made of non-magnetic material. The teeth on both sides of the same Ω-shaped stator core and I-type stator core correspond to two mover cores respectively, and the mover cores adjacent to the same side ( 3) Embed permanent magnets, and ensure that the magnetic poles of the permanent magnets on both sides of the mover core are different, and the magnetic poles of the corresponding permanent magnets on both sides of the same Ω-type stator core and I-type stator core are also different; When the linear motor operates in three phases, three identical single-phase structures need to be placed in parallel, and the stator and mover of each single-phase structure are staggered by 120 degrees in electrical angle. 2. A kind of Ω-I type stator transverse flux permanent magnet linear motor according to claim 1, characterized in that, the Ω type stator core and the I type stator core are stacked by silicon steel sheets, and when the mover moves They are staggered at intervals in the front and back directions, and share the same armature winding. 3. A kind of Ω-I type stator transverse flux permanent magnet linear motor according to claim 1, characterized in that, both sides of the mover iron core are embedded with permanent magnets with opposite magnetic pole directions, and are fixed on a non-magnetically conductive Material mover support. 4. A kind of Ω-I type stator transverse flux permanent magnet linear motor according to claim 1, characterized in that, what the material of the permanent magnet adopts is RuFeB. 5 . The Ω-I type stator transverse flux permanent magnet linear motor according to claim 1 , wherein the mover support made of non-magnetic material is made of steel. 6 . 6 . The Ω-I type stator transverse flux permanent magnet linear motor according to claim 1 , wherein each pair of Ω-I type stator cores is separated by a pole pitch. 7. A kind of Ω-I type stator transverse flux permanent magnet linear motor according to claim 2, characterized in that, multiple pairs of Ω-I type stator cores are integrated on the armature winding to improve the space utilization of the motor and power.

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