CN201038956Y - Three-phase squirrel-cage induction motor - Google Patents

Abstract

The utility model provides a three-phase squirrel-cage induction motor, the rotor winding slot of the motor is a conical slot, the conical slot is formed by the excircle connecting line of a larger round hole and a smaller round hole slot, the stator winding slot is formed by extending the tangent line of a round hole slot and the excircles at two sides to the center of the stator, the lower end is provided with a width opening, the width opening extends a distance inwards in an oblique way to form an opening width, the opening width extends a distance downwards in parallel to form a section of square groove; the motor has the advantages of high efficiency which is improved by 3-5% compared with the prior motors of the same type, small vibration, large starting torque and low noise, and conforms to the standards of the motors of the same type in Europe, America and Japan.

Description

Three-phase squirrel-cage induction motor

technical field

The utility model relates to a motor, in particular to a three-phase squirrel-cage induction motor.

Background technique

At present, the efficiency of three-phase squirrel-cage induction motors is low, generally around 83%. According to the conventional structure of this type of motor, the efficiency of this type of motor cannot be improved any more.

Contents of the invention

The technical problem of the utility model is to provide a high-efficiency three-phase squirrel-cage induction motor.

In order to solve the above technical problems, the utility model provides a new winding groove structure, which greatly improves the efficiency of this type of motor. The winding groove structure of the utility model is: the radius of the inner circle of the stator is D _i , the radius of the stator is D ₀ , the structure of the winding groove of the stator is formed by a circular hole groove and the tangent lines of the outer circles on both sides extending to the center of the stator, The extension distance is G from the center of the circle, and the width of the lower end is B. From the opening of this width, extend obliquely inward for a distance to form the opening width A, and extend the opening width A parallelly downwards for a distance D to form a square groove. The slot is connected with the inner circle of the stator, the diameter of the circular hole slot is C, the distance between the outer circle of the circular hole slot and the inner circle of the stator is F; the radius of the inner circle of the rotor is d _i , the radius of the rotor is d ₀ , and the rotor winding slot The structure is:

1) It is a tapered groove. The tapered groove is formed by the connection line between the outer circles of a larger circular hole groove and a smaller circular hole groove. The diameter of the circular hole groove is b, and the diameter of the circular hole groove is c, the distance between the centers of the two round hole slots is e, and the distance between the top of the round hole slot and the outer circle of the rotor is d; or

2) It consists of a round hole slot and a tapered slot. The diameter of the round hole slot is a. The two slots are connected by a square slot with a width b. The length of the square slot is f. The tapered slot is composed of a round hole The outer circle tangent line between the groove and another smaller circular hole groove is formed. The diameter of the circular hole groove is c, the diameter of the circular hole groove is d, the distance between the centers of the circular hole grooves is g, and the circular hole groove The distance between the outer circle of the rotor and the outer circle of the rotor is e; or

3) It consists of a round hole slot and a tapered slot. The diameter of the round hole slot is a, and the two slots are connected by a square slot with a width of b. The length of the square slot is f, and the opening width of the tapered slot is c, extending obliquely inward from the opening width for a distance to form the opening width d, the length between the two openings is g, and the distance between the outer circle of the circular hole slot and the outer circle of the rotor is e.

Another stator winding slot structure is formed by extending the two ends of a tapered slot opening toward the center of the stator. The width of the upper end is C, and the width of the lower end is B. From the width opening of the lower end, it extends obliquely inward for a distance to form an opening width A. , extending the width A of the opening parallelly downwards for a distance D to form a square slot, which communicates with the inner circle of the stator, and the distance between the top of the tapered slot and the inner circle of the stator is F; the radius of the inner circle of the rotor is d _i , the radius of the rotor is d ₀ , the structure of the rotor winding slot is composed of an arrow-shaped slot and a slot at the rear of the arrow-shaped slot, the arrow-shaped slot is triangular, the width of the top of the triangle is a, and the width of the bottom of the triangle is b, The height of the triangle is g, the distance between the top of the triangle and the outer circle of the rotor is f, the arrow groove and the rear groove are connected by a square groove, the width of the square groove is c, the width of the upper part of the rear groove is d, and the width of the lower part of the rear groove is e, The height of the rear slot is h, and the distance from the bottom of the rear slot to the outer circle of the rotor is i.

The utility model has the advantages of high efficiency, small vibration, large starting torque and low noise, and conforms to European, American and Japanese standards.

Description of drawings

Fig. 1 is a kind of stator outline schematic diagram of the present utility model;

Fig. 2 is a structural diagram of the winding groove of Fig. 1;

Figure 3 is a schematic diagram of the appearance of the rotor;

Fig. 4 is a structural diagram of the winding groove of Fig. 3;

Figure 5 is a schematic diagram of another rotor shape;

Fig. 6 is a structural diagram of the winding groove of Fig. 5;

Figure 7 is a schematic diagram of another rotor shape;

Fig. 8 is a structural diagram of the winding groove of Fig. 7;

Fig. 9 is a schematic diagram of another stator of the present invention;

Fig. 10 is a structural diagram of the winding groove of Fig. 9;

Fig. 11 is a schematic diagram of the rotor profile of the stator shown in Fig. 9;

Fig. 12 is a structural diagram of the winding groove of Fig. 11;

Figure 13 is a schematic diagram of the end ring structure.

Explanation of symbols in the figure

1—round hole slot;

111—round hole groove; 112—round hole groove; 113—tapered groove;

114—round hole groove; 115—tapered groove; 116—round hole groove;

117—round hole groove; 118—round hole groove; 119—tapered groove;

2—tapered groove;

211 arrow grooves; 212—rear groove.

Detailed ways

Please refer to the accompanying drawings for a further description of the utility model.

As shown in Figure 1 and Figure 2, the radius of the inner circle of the stator is D _i , and the radius of the stator is D ₀ . The extension distance is G from the center of the circle, and the width of the lower end is B. From the opening of this width, extend obliquely inward for a distance to form the opening width A, and extend the opening width A parallelly downwards for a distance D to form a square groove. The slot is connected to the inner circle of the stator, the diameter of the circular hole slot 1 is C, the distance between the outer circle of the circular hole slot 1 and the inner circle of the stator is F; the radius of the inner circle of the rotor is d _i , the radius of the rotor is d ₀ , and the rotor The structure of the winding slot is:

1) As shown in Fig. 3 and Fig. 4, it is a tapered groove 113, and the tapered groove 113 is formed by connecting the outer circles of a larger circular hole groove 111 and a smaller circular hole groove 112. The diameter of the hole slot 111 is b, the diameter of the round hole slot 112 is c, the distance between the centers of the two round hole slots is e, and the distance between the top of the round hole slot 111 and the outer circle of the rotor is d; or

2) As shown in Figure 5 and Figure 6, it consists of a round hole groove 114 and a tapered groove 115. The diameter of the round hole groove 114 is a, and the two grooves are connected by a square groove with a width of b. The square groove The length of f is f, and the tapered groove 115 is formed by the outer circle tangent connection line of a circular hole groove 116 and another smaller circular hole groove 117, and the diameter of the circular hole groove 116 is c, and the diameter of the circular hole groove 117 is d, the center distance between the circular hole grooves 116 and 117 is g, and the distance between the outer circle of the circular hole groove 114 and the outer circle of the rotor is e; or

3) As shown in Fig. 7 and Fig. 8, it is composed of a circular hole groove 118 and a tapered groove 119. The diameter of the circular hole groove 118 is a, and the two grooves are connected by a square groove with a width of b. The square groove The length of the tapered groove 9 is f, the opening width of the tapered groove 9 is c, and a certain distance is extended obliquely inwardly from the opening width to form the opening width d, the length between the two openings is g, the outer circle of the circular hole groove 118 is in line with the outer surface of the rotor The distance between the circles is e;

As shown in Figure 9 and Figure 10, another structure of the stator winding slot is formed by extending the two ends of the opening of a tapered slot 2 to the center of the stator, the width of the upper end is C, and the width of the lower end is B. Extend inward for a certain distance to form an opening width A, and extend the opening width A parallelly downward for a distance D to form a square groove, which communicates with the inner circle of the stator, and the distance between the top of the tapered groove 2 and the inner circle of the stator is F; as shown in Figure 11 and Figure 12, the radius of the inner circle of the rotor is d _i , the radius of the rotor is d ₀ , the structure of the rotor winding slot is composed of an arrow-shaped slot 211 and a slot 212 at the rear of the arrow-shaped slot The arrow-shaped groove 211 is triangular, the width of the triangle top is a, the width of the triangle base is b, the height of the triangle is g, the distance between the triangle top and the outer circle of the rotor is f, the arrow groove 211 and the rear groove 212 are composed of a square groove Connected, the width of the square slot is c, the width of the upper part of the rear slot 212 is d, the width of the lower part of the rear slot 212 is e, the height of the rear slot 212 is h, and the distance from the bottom of the rear slot 212 to the outer circle of the rotor is i.

The size of the stator and rotor of the utility model motor and its winding groove structure can be assembled into the following types of high-efficiency motors:

1) For 6 poles, the frame number is 71, the stator has 36 slots, and the rotor has 33 slots:

D _o =125±0.5mm, D _i =85±0.5mm, d _o =85±0.5mm, d _i =20±0.5mm;

A=2.2±0.5mm, B=4.103±0.5mm, C=5.5±0.5mm, D=0.8±0.5mm,

E＝1.146±0.5mm, F＝12±0.5mm, G＝8.104±0.5mm;

a=0, b=3.5±0.5mm, c=2.5±0.5mm, d=0.77±0.5mm, e=4±0.5mm,

f=7.77±0.5mm;

The slope of the end ring is 8±2 degrees, the outer diameter D1=83mm, the inner diameter D2=59mm, L=7mm;

2) For 6 poles, the frame number is 80, the stator has 36 slots, and the rotor has 44 slots:

D _o ＝140±0.5mm, D _i ＝85±0.5mm, d _o ＝85±0.5mm, d _i ＝20mm～28mm;

A=2.2±0.5mm, B=3.606±0.5mm, C=5.38±0.5mm, D=0.8±0.5mm,

E＝1.056±0.5mm, F＝14±0.5mm, G＝10.254±0.5mm;

a=0, b=2.9±0.5mm, c=1.9±0.5mm, d=0.52±0.5mm, e=7±0.5mm,

f=9.92±0.5mm;

The slope of the end ring is 10.5±2 degrees, the outer diameter D1=83mm, the inner diameter D2=59mm, L=7mm;

3) For 6 poles, the frame number is 90, the stator has 36 slots, and the rotor has 44 slots:

D _o =160±0.5mm, Di=95±0.5mm, d _o =95±0.5mm, d _i =28±0.5mm;

A=2.3±0.5mm, B=4.4624±0.5mm, C=6.7058±0.5mm, D=0.8±0.5mm,

E＝1.1935±0.5mm, F＝17.5±0.5mm, G＝12.9536±0.5mm;

a=0, b=3.8±0.5mm, c=2.52±0.5mm, d=0.53±0.5mm, e=9±0.5mm,

f=12.69±0.5mm;

The slope of the end ring is 8.3±2 degrees, the outer diameter D1=93mm, the inner diameter D2=63mm, L=10mm;

4) For 6 poles, the frame number is 100, the stator has 36 slots, and the rotor has 44 slots:

D _o =160±0.5mm, D _i =95±0.5mm, d _o =95±0.5mm, d _i =28±0.5mm;

A=2.3±0.5mm, B=4.4624±0.5mm, C=6.7058±0.5mm, D=0.8±0.5mm,

E＝1.1935±0.5mm, F＝17.5±0.5mm, G＝12.9536±0.5mm;

a=0, b=3.8±0.5mm, c=2.52±0.5mm, d=0.53±0.5mm, e=9±0.5mm,

f=12.69±0.5mm;

The slope of the end ring is 9.6±2 degrees, the outer diameter D1=107mm, the inner diameter D2=67mm, L=11mm;

5) For 6 poles, the frame number is 112, the stator has 36 slots, and the rotor has 26 slots:

D _o ＝190±0.5mm, D _i ＝120±0.5mm, d _o ＝120±0.5mm, d _i ＝32±0.5mm;

A=3±0.5mm, B=5.4±0.5mm, C=8.2±0.5mm, D=0.8±0.5mm,

E＝2±0.5mm, F＝22.6±0.5mm, G＝16.5±0.5mm;

a=0, b=6.5±0.5mm, c=3.6±0.5mm, d=0.6±0.5mm, e=12±0.5mm,

f=17.65±0.5mm;

The slope of the end ring is 10.5±2 degrees, the outer diameter D1=117mm, the inner diameter D2=70mm, L=10mm;

6) For 6 poles, the frame number is 132, the stator has 54 slots, and the rotor has 42 slots:

D _o ＝220±0.5mm, D _i ＝140±0.5mm, d _o ＝140±0.5mm, d _i ＝42±0.5mm;

A=2.5±0.5mm, B=3.9±0.5mm, C=6±0.5mm, D=0.8±0.5mm,

E＝2±0.5mm, F＝23±0.5mm, G＝18±0.5mm;

a=0, b=5±0.5mm, c=2.6±0.5mm, d=0.6±0.5mm, e=16±0.5mm,

f=20.4±0.5mm;

The slope of the end ring is 8.5±2 degrees, the outer diameter D1=137mm, the inner diameter D2=72mm, L=10mm;

7) For 6 poles, the frame number is 160, the stator has 54 slots, and the rotor has 42 slots:

D _o =260±0.5mm, D _i =175±0.5mm, d _o =175±0.5mm, d _i =50±0.5mm;

A=3±0.5mm, B=5.198±0.5mm, C=7.3±0.5mm, D=0.8±0.5mm,

E＝1.2±0.5mm, F＝23±0.5mm, G＝18.150±0.5mm;

a=6.26±0.5mm, b=1.5±0.5mm, c=4.88±0.5mm, d=3.38±0.5mm,

e=0.7±0.5mm, f=3.64±0.5mm; g=10±0.5mm, h=24.73±0.5mm;

The slope of the end ring is 14±2 degrees, the outer diameter D1=172mm, the inner diameter D2=116mm, L=10mm;

8) For 6 poles, the frame number is 200, the stator has 72 slots, and the rotor has 55 slots:

D _o =360±0.5mm, D _i =250±0.5mm, d _o =250±0.5mm, d _i =75±0.5mm;

A=3±0.5mm, B=5.42±0.5mm, C=7.6±0.5mm, D=0.8±0.5mm,

E=2±0.5mm, F=32±0.5mm, G=26.2±0.5mm;

a=6±0.5mm, b=1.5±0.5mm, c=6.4±0.5mm, d=3.9±0.5mm,

e=0.85±0.5mm, f=3.0±0.5mm; g=22±0.5mm, h=37±0.5mm;

The slope of the end ring is 10.9±2 degrees, the outer diameter D1=246mm, the inner diameter D2=175mm, L=25mm;

9) For 6 poles, the frame number is 225, the stator has 72 slots, and the rotor has 60 slots:

D _o ＝400±0.5mm, D _i ＝280±0.5mm, d _o ＝280±0.5mm, d _i ＝90±0.5mm;

A=3±0.5mm, B=6.6±0.5mm, C=9±0.5mm, D=0.8±0.5mm,

E＝2±0.5mm, F＝34±0.5mm, G＝27.5±0.5mm;

a=6.55±0.5mm, b=1.5±0.5mm, c=6.403±0.5mm, d=3.863±0.5mm,

e=1.2±0.5mm, f=3.0±0.5mm; g=24.25±0.5mm, h=35±0.5mm;

The slope of the end ring is 12.2±2 degrees, the outer diameter D1=276mm, the inner diameter D2=200mm, L=30mm;

10) For 6 poles, the frame number is 250, the stator has 72 slots, and the rotor has 56 slots:

D _o =430±0.5mm, D _i =300±0.5mm, d _o =300±0.5mm, d _i =95±0.5mm;

A=3±0.5mm, B=6.4±0.5mm, C=9.3±0.5mm, D=0.8±0.5mm,

E=2±0.5mm, F=36±0.5mm;

a=1.5±0.5mm, b=7.5±0.5mm, c=1.5±0.5mm, d=6.8±0.5mm,

e=3.6±0.5mm, f=1.25±0.5mm; g=9±0.5mm, h=28±0.5mm,

i=40.25±0.5mm;

The slope of the end ring is 13.1±2 degrees, the outer diameter D1=296mm, the inner diameter D2=220mm, L=22.5mm;

Claims (3)

1. A three-phase squirrel-cage induction motor, characterized in that: the inner radius of the stator is D _i , the radius of the stator is D ₀ , and the structure of the stator winding groove is: 1) It is formed by extending a circular hole slot (1) and the tangents of the outer circles on both sides to the center of the stator. The extension distance is G from the center of the circle, and the width of the lower end is B. From the opening of this width, it extends obliquely inward for a distance to form an opening Width A, the opening width A is extended parallel to a distance D to form a square slot, the square slot communicates with the inner circle of the stator, the diameter of the round hole slot 1 is C, and the outer circle of the round hole slot 1 is connected to the inner circle of the stator The distance is F; or 2) It is formed by extending the two ends of the opening of a tapered slot (2) toward the center of the stator. The width of the upper end is C, and the width of the lower end is B. From the opening of the lower end, it extends obliquely inward for a distance to form the opening width A. The opening width A extends downward in parallel for a distance D to form a section of square slot, which communicates with the inner circle of the stator, and the distance between the top of the tapered slot (2) and the inner circle of the stator is F. 2. a kind of three-phase squirrel-cage induction motor according to claim 1, is characterized in that: described 1st) kind stator, the inner circle radius of its rotor is d _i , the radius of rotor is d ₀ , the rotor The structure of the winding slot is: 1) It is a tapered groove (113), and the tapered groove (113) is formed by connecting the outer circles of a larger circular hole groove (111) and a smaller circular hole groove (112), and the circular hole The diameter of the groove (111) is b, the diameter of the circular hole groove (112) is c, the distance between the centers of the two circular hole grooves is e, and the distance between the top of the circular hole groove (111) and the outer circle of the rotor is d; or 2) It is composed of a circular hole groove (114) and a tapered groove (115). The diameter of the circular hole groove (114) is a, and the two grooves are connected by a square groove with a width of b. The length of the square groove is f, the tapered groove (115) is formed by a circular hole groove (116) and the outer circle tangent line of another smaller circular hole groove (117), the diameter of the circular hole groove (116) is c, and the circle The diameter of the hole slot (117) is d, the center distance between the round hole slots (116) and (117) is g, and the distance between the outer circle of the round hole slot (114) and the outer circle of the rotor is e; or 3) It is made up of a round hole groove (118) and a tapered groove (119). The diameter of the round hole groove (118) is a, and the square groove with width b between the two grooves is connected. The length of the square groove is f, the opening width of the tapered groove (9) is c, and a certain distance is extended obliquely inwardly from the opening width to form the opening width d, the length between the two openings is g, the outer circle of the circular hole groove (118) and the rotor The distance between the outer circles is e. 3. a kind of three-phase squirrel-cage induction motor according to claim 1, is characterized in that: described 2nd) kind stator, the inner circle radius of its rotor is d _i , the radius of rotor is d ₀ , the rotor The structure of the winding groove is composed of an arrow-shaped groove (211) and a groove (212) at the rear of the arrow-shaped groove. The height is g, the distance between the top of the triangle and the outer circle of the rotor is f, the arrow groove (211) and the rear groove (212) are connected by a square groove, the width of the square groove is c, and the width of the upper part of the rear groove (212) is d. The width of the bottom of the rear groove (212) is e, the height of the rear groove (212) is h, and the distance from the bottom of the rear groove (212) to the outer circle of the rotor is i.

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