CN203219015U - A super-efficient 2-pole stator punch for a 250 center height motor - Google Patents

Abstract

The utility model discloses a super high efficiency two-pole stator punching sheet of a 250 height of center motor. The stator punching sheet is a circular hollow structure, an inner diameter round edge of the stator punching sheet is uniformly distributed with winding slots extending inwards, an inner diameter of the stator punching sheet is 235mm, an outer diameter of the stator punching sheet is 425mm, each winding slot comprises an arc edge, two side edges, two bevel edges and two straight edges which are sequentially arranged from inside to outside, depth of each winding slot is 32.9mm, a diameter of the arc edge is 14.8 mm, depth of the straight edges is 1mm, slot width of a connection portion of the two side edges and the arc edge is equal to the diameter of the arc edge, slot width of a connection portion of the two side edges and the bevel edges is 10.7mm, a tangential included angle a formed by the bevel edges and the inner diameter of the stator punching sheet is 200, and width of a slot formed by the two straight edges is 4mm. The stator punching sheet realizes integrated electro-magnetic design of the inner and outer diameters of the stator punching sheet, slot shapes and a slot number to meet IE3 energy efficiency requirements prescribed in IEC60034.30-2008, motor power is improved by 20-50%, efficiency is improved by 2-5 points, noise is reduced by 10%, and temperature rising is reduced by about 5%.

Description

A super-efficient 2-pole stator punch for a 250 center height motor

technical field

    The utility model relates to the field of electromagnetic structures of small and medium-sized electric motors, in particular to a super-efficient 2-pole stator stamping sheet of a 250 center height electric motor.

Background technique

The force index of the three-phase asynchronous motor has a great relationship with the structure of the stator punch. Different structures (including the outer diameter, middle diameter and groove shape of the stator punch) will have different performances, especially the efficiency index of the motor. Involved in energy efficiency assessment. The structure of stator stamping in the existing Y2 series motors can no longer meet the energy efficiency index stipulated in the current IEC standard. Therefore, it is inevitable to redesign the stator punching structure of small and medium motors. The previous design only focused on the change of the groove shape, but did not give much consideration to the inner and outer diameters of the punching sheet and the corresponding number of grooves. In this case, a comprehensive electromagnetic design was carried out on the inner and outer diameters, slot shapes and number of slots of the stator punch, which met the IE3 energy efficiency requirements (94.1%) specified in IEC60034.30-2008.

Contents of the invention

The technical problem to be solved by the utility model is to provide a super-efficient 2-pole stator stamping for a 250-centre high motor, the motor power is increased by 20%-50%, the efficiency is increased by 2-5 points, the noise is reduced by 10%, and the temperature rise is reduced About 5%.

The utility model is realized through the following technical solutions:

A super-efficient 2-pole stator stamping for a 250 center height motor, the stator stamping is a circular hollow structure, and winding slots extending inward are evenly distributed on the inner diameter of the stator stamping, and the inner diameter of the stator stamping is is 235mm, and the outer diameter is 425mm; the winding groove is composed of arc sides, two sides, two hypotenuses and two straight sides from the inside to the outside, the depth of the winding groove is 32.9mm, and the diameter of the arc side is 14.8 mm, the depth of the straight side is 1mm, the width of the slot formed at the joint between the two sides and the arc side is the same as the diameter of the arc side, the width of the slot formed at the joint between the two sides and the hypotenuse is 10.7mm, the width of the slot formed between the hypotenuse and the stator The tangential angle a formed by the inner diameter of the punch is 20 ⁰ , and the groove width formed by the two straight sides is 4mm.

The further improvement of the utility model is that the number of the winding slots is 36.

The further improvement of the utility model is that fastening grooves and positioning grooves are evenly distributed on the outer diameter circular surface of the stator punching sheet.

The further improvement of the utility model is that, from the outside to the inside, the positioning groove consists of two oblique sides inclined to both sides, two first straight vertical sides, two first horizontal sides, two second straight vertical sides and a second Composed of horizontal sides, the groove width formed by the connection between the hypotenuse and the first vertical side is 18mm, the angle b formed by the hypotenuse and the first vertical side is 15°, and the depth of the first vertical side is 0.8mm. The width of the groove formed by the second vertical side and the second horizontal side is 4mm, and the depth is 2mm. The second vertical side on the left is at the center line of the positioning groove, and the second vertical side is connected to the first horizontal side. The distance between the position and the tangent line of the outer diameter of the stator punching sheet is 3mm. the

A further improvement of the utility model is that, the connection between the first straight vertical side and the first horizontal side is a circular arc transition connection, and the radius of the circular arc is 0.5 mm. the

The further improvement of the utility model is that the number of the fastening grooves is 8, and the number of the positioning grooves is 1.

Compared with the prior art, the utility model has the following obvious advantages:

The utility model conducts a comprehensive electromagnetic design on the inner and outer diameters, slot shapes and slot numbers of the stator punching sheet to meet the IE3 energy efficiency requirement (94.1%) stipulated in IEC60034.30-2008, the motor power is increased by 20%-50%, and the efficiency Increase by 2-5 points, the noise will be reduced by 10%, and the temperature rise will be reduced by about 5%.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 is an enlarged view of I in Figure 1.

Fig. 3 is an enlarged view of II in Fig. 1 .

Detailed ways

As shown in Fig. 1 to Fig. 3, the ultra-efficient 2-pole stator stamping of a 250 center high motor described in the utility model, the stator stamping is a circular hollow structure, and the inner diameter of the stator stamping is evenly distributed on the round edge There is a winding slot 1 extending inward, the inner diameter of the stator punch is 235mm, and the outer diameter is 425mm; the winding slot 1 is sequentially composed of an arc edge 11, two side edges 12, two hypotenuses 13 and Composed of two straight sides 14, the number is 72, the depth of the winding groove 1 is 32.9mm, the diameter of the arc side 11 is 14.8mm, the depth of the straight side 14 is 1mm, and the connection between the two sides 12 and the arc side 11 is formed The width of the slot is the same as the diameter of the arc side 11, the width of the slot formed at the junction of the two side sides 12 and the hypotenuse 13 is 10.7mm, and the tangential angle a formed by the hypotenuse 13 and the inner diameter of the stator punch is 20 ⁰ . The groove width formed by the straight edge 14 is 4mm.

Eight fastening slots 2 and one positioning slot 3 are evenly distributed on the outer diameter circle of the stator punching sheet.

The positioning groove 3 is composed of two hypotenuses 31, two first straight vertical sides 32, two first horizontal sides 33, two second straight vertical sides 34 and a second horizontal side 35, which are inclined to both sides from the outside to the inside. , the groove width formed at the junction of the hypotenuse 31 and the first vertical side 32 is 18mm, the angle b formed between the hypotenuse 31 and the first vertical side 32 is 15°, and the depth of the first vertical side 32 is 0.8mm , the groove width formed by the two second straight vertical sides 34 and the second transverse side 35 is 4mm, and the depth is 2mm. 34 and the first transverse edge 35, and the distance between the tangent to the outer diameter of the stator punching sheet is 3mm. The connection between the first vertical side 34 and the first horizontal side 35 is a circular arc transition connection with a radius of 0.5mm. the

Claims (6)

1. ultra high efficiency 2 utmost point stator punchings of the high motor in center, described stator punching is circular hollow structure, be evenly distributed with the winding slot (1) that extends internally on the stator punching internal diameter round edge, it is characterized in that: described stator punching internal diameter is 235mm, and external diameter is 425mm; Described winding slot (1) is made up of circular arc limit (11), dual-side (12), two hypotenuses (13) and two straight flanges (14) from inside to outside successively, the degree of depth of winding slot (1) is 32.9mm, circular arc limit (11) diameter is 14.8mm, the degree of depth of straight flange (14) is 1mm, the groove width that dual-side (12) and junction, circular arc limit (11) form is identical with the diameter of circular arc limit (11), dual-side (12) is 10.7mm with the groove width that hypotenuse (13) junction forms, and hypotenuse (13) is 20 with the tangential a angle that the stator punching internal diameter forms ⁰, the groove width that two straight flanges (14) form is 4mm.

2. stator punching according to claim 1, it is characterized in that: described winding slot (1) quantity is 36.

3. stator punching according to claim 1 is characterized in that: be evenly equipped with binding groove (2) and location notch (3) on the described stator punching external diameter disc.

4. stator punching according to claim 3, it is characterized in that: described location notch (3) is certainly outside to inside successively by two hypotenuses (31) that tilt to both sides, two first straight vertical edges (32), two first horizontal edges (33), two second straight vertical edges (34) and one second horizontal edge (35) are formed, hypotenuse (31) is 18mm with the groove width that first straight vertical edge (32) junction forms, hypotenuse (31) is 15 ° with the b angle that the first straight vertical edge (32) forms, the degree of depth of the first straight vertical edge (32) is 0.8mm, two second straight vertical edges (34) are 4mm with the groove width that second horizontal edge (35) forms, the degree of depth is 2mm, the second straight vertical edge (34) in left side is in described location notch (3) position of center line, and this second straight vertical edge (34) is 3mm with the spacing of first horizontal edge (35) junction and stator punching external diameter tangent line.

5. stator punching according to claim 4, it is characterized in that: the described first straight vertical edge (34) is that arc transition is connected with first horizontal edge (35) junction, and arc radius is 0.5mm.

6. stator punching according to claim 3, it is characterized in that: described binding groove (2) quantity is 8, location notch (3) quantity is 1.

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