阅读说明：本技术 无缝电枢绕组永磁同步电动机 (Permanent-magnet synchronous motor with seamless armature winding ) 是由 王宗培 王岗 于 2019-09-30 设计创作，主要内容包括：本发明公开了无缝电枢绕组永磁同步电动机，其特征在于：包括前轴承(1)、前端盖(2)、电枢绕组(3)、定子铁芯(4)、转子(5)、后端盖(6)和后轴承(7)，所述转子(5)包括后压圈(51)、不锈钢套(52)、前压圈(53)、永磁体磁极(54)和转子轴(55)，所述永磁体磁极(52)由沿其轴向的三段磁体固定连接而成，并且三段磁体中每段磁体依次错位一空间角。本发明采用转子磁极分段错位实现转子斜极，有效消除了齿槽的定位转矩，而且电动机的波形正弦性好，没有明显的波纹。(The invention discloses a permanent magnet synchronous motor with a seamless armature winding, which is characterized in that: the permanent magnet motor comprises a front bearing (1), a front end cover (2), an armature winding (3), a stator core (4), a rotor (5), a rear end cover (6) and a rear bearing (7), wherein the rotor (5) comprises a rear pressing ring (51), a stainless steel sleeve (52), a front pressing ring (53), a permanent magnet magnetic pole (54) and a rotor shaft (55), the permanent magnet magnetic pole (52) is formed by fixedly connecting three sections of magnets along the axial direction of the permanent magnet magnetic pole, and each section of magnet in the three sections of magnets is staggered by a space angle in sequence. The invention realizes the rotor slant pole by the rotor magnetic pole subsection dislocation, effectively eliminates the positioning torque of the tooth socket, and the motor has good waveform sine property and no obvious ripple.)

1. Seamless armature winding permanent magnet synchronous motor, its characterized in that: the permanent magnet motor comprises a front bearing (1), a front end cover (2), an armature winding (3), a stator core (4), a rotor (5), a rear end cover (6) and a rear bearing (7), wherein the rotor (5) comprises a rear pressing ring (51), a stainless steel sleeve (52), a front pressing ring (53), a permanent magnet magnetic pole (54) and a rotor shaft (55), the permanent magnet magnetic pole (52) is formed by fixedly connecting three sections of magnets along the axial direction of the permanent magnet magnetic pole, and each section of magnet in the three sections of magnets is staggered by a space angle in sequence.

2. The seamless armature winding permanent magnet synchronous motor according to claim 1, wherein: the spatial angle of each section of magnet in the three sections of magnets and the adjacent magnet are staggered to be the same.

3. A seamless armature winding permanent magnet synchronous motor as claimed in claim 2, wherein: the spatial angle of dislocation between each section of magnet and the adjacent magnet in the three sections of magnets is 11 degrees.

4. The seamless armature winding permanent magnet synchronous motor according to claim 1, wherein: the rotor (5) is a four-pole rotor.

5. The seamless armature winding permanent magnet synchronous motor according to claim 1, wherein: the number of the slots of the stator iron core (4) is 6.

6. The seamless armature winding permanent magnet synchronous motor according to claim 5, wherein: the 6 grooves are formed by surrounding two adjacent teeth, and the width of each notch is smaller than the distance between two adjacent teeth except the notch.

7. A seamless armature winding permanent magnet synchronous motor as in claim 6, wherein: the stator core (4) is made of silicon steel sheets.

8. A seamless armature winding permanent magnet synchronous motor as in claim 7 wherein: the stator core (4) is made of silicon steel sheets with the thickness of 0.2 or 0.35.

9. The gapless armature winding permanent magnet synchronous motor according to claim 5 or 6, wherein: the armature winding (3) is three-phase, each phase of winding occupies two teeth, the first tooth and the fourth tooth are continuously wound into one phase, and a end a and an end x are led out; the third tooth and the sixth tooth are continuously wound into a phase, and a b end and a y end are led out; the fifth tooth and the second tooth are continuously wound into one phase, and c and z ends are led out, wherein the a end and the z end are combined and connected with the U end of the motor, the b end and the x end are combined and connected with the V end of the motor, and the c end and the y end are combined and connected with the W end of the motor.

Technical Field

The invention relates to the technical field of motors, in particular to a permanent magnet synchronous motor with a seamless armature winding.

Background

The land, air and water mobile devices all adopt 12-48 (72) V direct current power supplies, need low-voltage driven permanent magnet synchronous motors, and the pursuit of small size, light weight and high power density increases the demand of high-speed motors. The motor with a small base number of 40-60 can achieve a rated torque of 1-2 Nm, the output power of the motor reaches from thousands of watts to hundreds of kilowatts when tens of thousands of revolutions per minute, the winding current reaches hundreds of amperes or even thousands of amperes when low voltage is supplied, the sectional area of the armature winding wire of the motor is quite large, and if the armature coils and the phases are connected in a welding or crimping mode as usual, the realization of the small motor end space is quite complicated.

Disclosure of Invention

Based on the defects of the prior art, the invention aims to provide a permanent magnet synchronous motor with seamless armature windings, which improves the structure of the permanent magnet synchronous motor, improves the performance of the permanent magnet synchronous motor and reduces the cost.

The technical scheme of the invention is as follows:

the seamless armature winding permanent magnet synchronous motor comprises a front bearing 1, a front end cover 2, an armature winding 3, a stator iron core 4, a rotor 5, a rear end cover 6 and a rear bearing 7, wherein the rotor 5 comprises a rear pressing ring 51, a stainless steel sleeve 52, a front pressing ring 53, a permanent magnet magnetic pole 54 and a rotor shaft 55, the permanent magnet magnetic pole 52 is formed by fixedly connecting three sections of magnets along the axial direction of the permanent magnet magnetic pole, and each section of the three sections of magnets is staggered by a space angle in sequence.

Further, the spatial angle of each magnet section in the three magnet sections, which is staggered with the adjacent magnet section, is the same.

Further, the spatial angle of each magnet section in the three magnet sections, which is staggered with the adjacent magnet section, is 11 degrees.

Further, the rotor 5 is a four-pole rotor.

Further, the number of slots of the stator core 4 is 6 slots.

Further, the 6 grooves are formed by surrounding two adjacent teeth, and the width of each notch is smaller than the distance between two adjacent teeth except the notch.

Further, the stator core 4 is made of a silicon steel sheet.

Further, the stator core 4 is made of a silicon steel sheet 0.2 or 0.35 thick.

Furthermore, the armature winding 3 is three-phase, each phase of winding occupies two teeth, the first tooth and the fourth tooth are continuously wound into one phase, and a end a and an end x are led out; the third tooth and the sixth tooth are continuously wound into a phase, and a b end and a y end are led out; the fifth tooth and the second tooth are continuously wound into one phase, and c and z ends are led out, wherein the a end and the z end are combined and connected with the U end of the motor, the b end and the x end are combined and connected with the V end of the motor, and the c end and the y end are combined and connected with the W end of the motor.

The invention has the beneficial effects that: the rotor magnetic poles are staggered in a segmented mode to realize rotor oblique poles, so that the positioning torque of tooth grooves is effectively eliminated, and the motor is good in waveform sine and free of obvious ripples.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;

FIG. 2 is a schematic view of a rotor structure according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of the rotor of FIG. 2 in accordance with the present invention;

fig. 4 is a schematic view of stator winding connection according to an embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the features of the following embodiments and examples may be combined with each other without conflict.

As shown in fig. 1-3, the permanent magnet synchronous motor with seamless armature windings comprises a front bearing 1, a front end cover 2, an armature winding 3, a stator core 4, a rotor 5, a rear end cover 6 and a rear bearing 7, wherein the rotor 5 comprises a rear pressing ring 51, a stainless steel sleeve 52, a front pressing ring 53, a permanent magnet magnetic pole 54 and a rotor shaft 55, the permanent magnet magnetic pole 52 is formed by fixedly connecting three sections of magnets along the axial direction of the permanent magnet magnetic pole, and each section of the three sections of magnets is staggered by a space angle in sequence. The spatial angle of dislocation of each section of magnet and the adjacent magnet in the three sections of magnets is the same, and the spatial angle of dislocation is 11 degrees.

The rotor 5 is a four-pole rotor. For high speed motors, it is not desirable to use multi-pole logarithm in addition to the low loss silicon steel sheet material required to reduce iron losses. The universal servo synchronous motor 4 has the most pole pairs 5, and the high-speed synchronous motor preferably adopts fewer pole pairs. The yoke part of the iron core of the stator and the iron core of the rotor of one pair of poles is relatively thickened, so that the space of an effective tooth layer for electromechanical energy conversion is reduced, and the torque density and the power density are reduced, so that 2 pairs of poles are optimal for a high-speed permanent magnet synchronous motor with a small base number. The three phases have two pairs of extremely minimum slots, meaning the minimum number of coils and the most simplified process, 6 slots. Each phase occupies two teeth, and each tooth has one turn to form two turns of the simplest phase winding in series. Therefore, as shown in fig. 4, the number of slots of the stator core 4 is 6. The 6 grooves are formed by surrounding two adjacent teeth, and the width of each notch is smaller than the distance between two adjacent teeth except the notch. The stator core 4 is made of a silicon steel sheet with a thickness of 0.2 or 0.35.

The armature winding 3 is three-phase, each phase of winding occupies two teeth, the first tooth and the fourth tooth are continuously wound into one phase, and a end a and an end x are led out; the third tooth and the sixth tooth are continuously wound into a phase, and a b end and a y end are led out; the fifth tooth and the second tooth are continuously wound into one phase, and c and z ends are led out, wherein the a end and the z end are combined and connected with the U end of the motor, the b end and the x end are combined and connected with the V end of the motor, and the c end and the y end are combined and connected with the W end of the motor.

The three-phase windings of the permanent magnet synchronous motor are connected by adopting a delta (△). the three-phase windings of the permanent magnet synchronous motor are generally connected by adopting a star (Y) connection method, because the electromotive force fundamental wave phases in the three-phase windings sequentially differ by 120 degrees in electrical angle, the third harmonic is in the same phase, when the three-phase windings are connected into a star, the third harmonic in the line potential is mutually counteracted, when the three-phase windings are connected into a triangle, the three-phase harmonics are superposed in a triangle loop, and large third harmonic circulation and large additional loss and resistance torque are possibly caused, but the winding current and the lead sectional area in the low-voltage high-speed permanent magnet motor are large, and in a narrow end space, both-end welding and crimping are difficult, namely the middle points of the three-phase star connection windings need to be welded or crimped together, so that the triangle connection windings are selected according to the requirement of a seamless armature winding, under the condition of 4-pole 6-slot matching, the pitch Y of the stator winding is a

Namely, it is

Is short to fall

And the third harmonic potential is zero in the short-distance winding with the polar distance angle, and the circulating current of the third harmonic is not generated.

Uniform and symmetrical winding distribution both electrically and spatially. The three-phase winding starts in 1, 2 and 3 slots respectively, the electromotive forces of the phase windings are also different by 120 degrees in electrical angle and are electrically symmetrical, but the distribution of the electromotive forces in the end space is not completely symmetrical and uniform. The invention adopts the starting ends a, b and c of the three-phase winding, which are respectively 1, 3 and 5 slots, so that the three-phase winding is electrically symmetrical and mechanically (spatially) symmetrically and uniformly distributed, and the three-phase winding comprises the uniformly and symmetrically distributed transition lines among the coils of each phase. The ends z, y and x of the phase winding to be merged with the three-phase starting end and led out are respectively arranged in 1, 3 and 5 slots, az, by and cx are naturally merged together to form U, V and W leading out, and a perfect seamless armature winding structure is formed.

The above embodiments are merely representative of the centralized embodiments of the present invention, and the description thereof is specific and detailed, but it should not be understood as the limitation of the scope of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the spirit of the present invention, and these changes and modifications all fall into the protection scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.