CN102780346A

CN102780346A - Ultra-energy-saving 18500W two-pole three-phase asynchronous electric motor

Info

Publication number: CN102780346A
Application number: CN201210233284XA
Authority: CN
Inventors: 吕三元
Original assignee: CHONGQING LEERJIA MACHINERY Co Ltd
Current assignee: CHONGQING LEERJIA MACHINERY Co Ltd
Priority date: 2012-07-06
Filing date: 2012-07-06
Publication date: 2012-11-14

Abstract

The invention relates to an ultra-energy-saving 18500W two-pole three-phase asynchronous electric motor, which comprises a stator and a rotor. The inner diameter and the iron core length of the stator, the groove shape and the size of a stator punching sheet groove, the inner diameter, the outer diameter and the iron core length of the rotor, and the groove shape and the size of a rotor punching sheet groove are optimized and reasonably designed, so the stator winding loss, the rotor winding loss and the iron core loss are greatly reduced, on the premise that the output power is identically 18.5kW, the total loss quantity of the exiting similar product is 2523.1W, the total loss quantity of the ultra-energy-saving 18500W two-pole three-phase asynchronous electric motor is only 1481.9 W and is reduced by 41.26 percent, and energy sources are greatly saved. Compared with the energy source conversion efficiency of the existing similar product being 88.0 percent, the energy source conversion efficiency of the ultra-energy-saving 18500W two-pole three-phase asynchronous electric motor is 92.7 percent and is improved by 4.7 percent. Meanwhile, because the center line of a stator buckle sheet groove is designed to penetrate through a position between two grooves of the stator punching sheet groove, the radial electromagnetic force wave in an air gap is weakened, the electromagnetic vibration is reduced, and the electromagnetic noise is lowered.

Description

Ultra energy-conservation 18500 watt of 2 pole three phase asynchronous motor

Technical field

The present invention relates to a kind of motor, particularly a kind of ultra energy-conservation 18500 watt of 2 pole three phase asynchronous motor.

Background technology

Motor has had nearly two one-hundred-year histories so far from coming out; Threephase asynchronous also has more than 100 year history; Be widely used in all trades and professions such as each worker, farming, woods, animal husbandry at present, and various fields in life, the essential equipment in commercial production and the people's lives become; But also become the maximum electric equipment of power consumption in production and the life simultaneously, so how to make the energy saving motor environmental protection just become people's important topic in front.China is Asia first power consumption state; Also be the present in the world the most serious developing country of short of electricity, from the annual energy output and the power consumption Jun Ju second place of the world of China in 1992, the energy shortage of China is because of energy waste mostly and utilizes improper institute to cause; China's industrial energy consumption accounts for 70% of total energy consumption at present; Wherein energy consumption of electrical machinery accounts for 60% ~ 70% of industrial total energy consumption, and therefore, the raising of motor energy efficiency level is for China's energy conservation, environmental protection and promote economic development significant; According to investigation, China IE1 (international motor efficiency classification standard)The motor use amount of grade still accounts for more than 90% of total use amount, and the above high-efficiency energy-saving motor usage ratio of IE2 only accounts for 8% of total use amount, can reach the use phoenix feathers and unicorn horns especially of the ultra high efficiency energy-saving motor of IE3 grade; This situation has produced great waste to entire society's resource, is the serious resistance of development low-carbon economy, so the research and development high-efficiency electric motor is one of important measures that improve energy utilization rate, meets the needs of China and development of world economy.

At present general on the China market is Y2 series threephase asynchronous; This motor comprises stator and rotor two large divisions; Its stator core is to be overrided to form by the stator punching that silicon steel sheet is made, and some grooves are arranged in the punching, inlays stator winding in the groove; Be set with the rotor magnetic pole made from silicon steel sheet that is overrided to form by rotor punching in the rotating shaft of rotor, the closed-loop path that has the rotor winding to form on the rotor magnetic pole; After stator fed electric current, the magnetic line of force of generation was through rotor, and produced induced current therein, and the electric current in the short-circuited conducting sleeve hinders the variation of magnetic flux, and the magnetic flux that causes short-circuited conducting sleeve part and short-circuited conducting sleeve not partly to produce has had phase difference, thereby forms rotating magnetic field; After energising starts, the rotor winding because of and magnetic field between exist relative motion induced electromotive force and electric current, there are relative rotation speed in rotating magnetic field and rotor, and produce electromagnetic torque with magnetic field interaction, rotor are rotated, the conversion of realization electric energy and mechanical energy; Under the full load working condition, the efficient of motor is generally higher, usually about 80%; Yet; In case load descends, efficiency of motor just significantly descends thereupon, because be by maximum possible load and the required power of the worst operating mode and fixed during motor selection; Most motors in the load factor of most of running time all 50%～60%, so the efficient during actual motion is all lower.

18500 watt of 2 pole three phase asynchronous motor overwhelming majority using in the market is the IE1 grade; Its energy conversion efficiency is 89.3%; A small amount of IE2 grade is also arranged, and its energy conversion efficiency has risen to 90.9%, but its energy-saving effect still can't satisfy the needs of current development low-carbon economy.

Summary of the invention

Technical problem to be solved by this invention provides the method that a kind of stator to 18500 watt of 2 pole three phase asynchronous motor, rotor and iron core, flute profile and size are optimized design; Through its running wastage of comprehensive reduction; Reach and guaranteeing that power output is under the prerequisite of 18.5kW, reduces the input power purpose to a greater extent.

For solving the problems of the technologies described above, the technical scheme that the present invention adopted is a kind of ultra energy-conservation 18500 watt of 2 pole three phase asynchronous motor, comprises stator and rotor, and stator comprises stator core, stator punching groove and stator cramp groove; Rotor comprises rotor core and rotor punching groove, it is characterized in that described diameter of stator bore is 14.5cm, and the length of stator core is 22.0cm, and the flute profile of described stator punching groove is a dovetail groove; Wherein the bottom land width is 10.60mm, and groove top is 22.20mm deeply, and groove shoulder height degree is 1.20mm, and groove shoulder breadth degree is 8.00mm; Width of rebate is 3.50mm, and the notch height is 0.80mm, and described stator cramp groove center line passes in the middle of two grooves of stator punching groove; Described rotor diameter is 14.39cm, and the rotor internal diameter is 5.0cm, and the length of rotor core is 22.0cm; The flute profile of described rotor punching groove is the two cage grooves of dome round bottom, and wherein width of rebate is 1.20mm, and the notch height is 1.20mm; Last groove radius is 3.00mm, and following slot opening is 1.50mm, and following notch height is 3.00mm; Following groove top radius is 3.25mm, and following slot part is 13.00mm deeply, and following bottom radius is 2.125mm.

The invention has the beneficial effects as follows that because the flute profile and the size of internal diameter, external diameter, core length and the rotor punching groove of the flute profile of internal diameter, core length and the stator punching groove of stator and size and rotor have been carried out the optimization appropriate design make the stator winding loss have only 332.9W, the rotor winding loss has only 269.3W; Core loss has only 20.4W, comprises stray loss 462.5W, mechanical loss 395.6W; Its energy total losses amount is 1481.9W, and the loss of existing 18500 watt of 2 pole three phase asynchronous motor stator winding has 566.5W, and the rotor winding loss has 702.3W; Core loss has 396.1W; Comprise stray loss 462.5W, mechanical loss 395.6W, its energy total losses amount is 2523.1W; The energy loss amount of wanting required for the present invention has reduced 41.26%, has practiced thrift the energy greatly; Be all in power output under the prerequisite of 18.5kW, the input power that existing like product needs is 21.023kW, and energy conversion efficiency is 88.0%; And input power required for the present invention is merely 19.982kW; Energy conversion efficiency is 92.6%, has improved 4.6%, has improved energy conversion efficiency greatly; Simultaneously,, weakened the radial electromagnetic force ripple in the air gap, reduced electric and magnetic oscillation, reduced electromagnetic noise because stator cramp groove center line is designed in the middle of two grooves of stator punching groove, pass.

Description of drawings

Fig. 1 is the sectional structure sketch map of ultra energy-conservation 18500 watt of 2 pole three phase asynchronous motor of the present invention.

Fig. 2 is a stator laminating structure sketch map of the present invention.

Fig. 3 is a stator punching groove structural representation of the present invention.

Fig. 4 is a rotor punching structural representation of the present invention.

Fig. 5 is a rotor punching groove structural representation of the present invention.

Among the figure: 1. stator, 2. rotor, 3. stator cramp groove, 4. stator core, 5. rotor core; 6. stator punching groove, 7. rotor punching groove, 8. diameter of stator bore, 9. stator cramp groove center line, 10. rotor diameter; 11. the rotor internal diameter, 61. bottom land width, 62. groove tops are dark, 63. groove shoulder height degree, 64. groove shoulder breadth degree; 65. width of rebate, 66. notch height, 71. notch height, groove radius on 72., 73. times slot openings; 74. following notch is high, 75. times groove top radiuses, and 76. times slot part is dark, 77. times bottom radius, 78. width of rebate.

Embodiment

Below in conjunction with embodiment the present invention is described further.

As shown in Figure 1, the present invention includes stator 1 and 2 two major parts of rotor, stock, structure and manufacture method are identical with common 18500 watt of 2 pole three phase asynchronous motor; Different places is that diameter of stator bore 8 is made 14.5cm, and the flute profile of stator punching groove 6 is made dovetail groove, and wherein bottom land width 61 is made 10.60mm; 22.20mm is made on groove top dark 62, and groove shoulder height degree 63 is made 1.20mm, and groove shoulder breadth degree 64 is made 8.00mm; Width of rebate 65 is made 3.50mm, and notch height 66 is made 0.80mm, and stator cramp groove center line 9 is passed in the middle of two grooves of stator punching groove; Be assembled into stator core 4 then, the length of stator core 4 is made 22.0cm; Again rotor diameter 10 is made 14.39cm, rotor internal diameter 11 is made 5.0cm, the flute profile of rotor punching groove 7 is made the two cage grooves of dome round bottom; Wherein width of rebate 78 is made 1.20mm, and notch height 71 is made 1.20mm, and last groove radius 72 is made 3.00mm; Following slot opening 73 is made 1.50mm; Following notch high 74 is made 3.00mm, and following groove top radius 75 is made 3.25mm, and following slot part dark 76 is made 13.00mm; Following bottom radius 77 is made 2.125mm, then the length of rotor core 5 is made 22.0cm; Other part is made 18500 watt of 2 pole three phase asynchronous motor according to commonsense method, promptly accomplishes the making of ultra energy-conservation 18500 watt of 2 pole three phase asynchronous motor.

Through check, the present invention compares with existing general Y2-160L type 18.5kW2 pole three phase asynchronous motor, draws contrast difference such as following table.

The structure and the performance difference comparison sheet of the present invention and traditional 18.5kW2 pole three phase asynchronous motor.

From showing and finding out; The present invention compares with existing general Y2-160L type 18.5kW2 pole three phase asynchronous motor; Energy conversion efficiency has brought up to 92.6% from 88.0%; With the highest ranking IE3 of international motor efficiency classification standard the efficiency standard requirement 92.4% of 18.5kW2 pole three phase asynchronous motor is compared, energy conversion efficiency has improved 0.2%.

The input power of wanting required for the present invention has dropped to 19.982kW from 21.023kW, and energy total losses amount has dropped to 1481.9W from 2523.0W, has reduced 41.26%, has practiced thrift the energy greatly.

Claims

1. ultra energy-conservation 18500 watt of 2 pole three phase asynchronous motor; Comprise stator (1) and rotor (2); Stator (1) comprises stator core (4), stator punching groove (6) and stator cramp groove (3), and rotor (2) comprises rotor core (5) and rotor punching groove (7), it is characterized in that:

Described diameter of stator bore (8) is 14.5cm, and the length of stator core (4) is 22.0cm;

The flute profile of described stator punching groove (6) is a dovetail groove; Wherein bottom land width (61) is 10.60mm; Groove top dark (62) is 22.20mm, and groove shoulder height degree (63) is 1.20mm, and groove shoulder breadth degree (64) is 8.00mm; Width of rebate (65) is 3.50mm, and notch height (66) is 0.80mm;

Described stator cramp groove center line (9) passes in the middle of two grooves of stator punching groove (6);

Described rotor diameter (10) is 14.39cm, and rotor internal diameter (11) is 5.0cm, and the length of rotor core (5) is 22.0cm;

The flute profile of described rotor punching groove (7) is the two cage grooves of dome round bottom, and wherein width of rebate (78) is 1.20mm, and notch height (71) is 1.20mm; Last groove radius (72) is 3.00mm; Following slot opening (73) is 1.50mm, and following notch high (74) is 3.00mm, and following groove top radius (75) is 3.25mm; Following slot part dark (76) is 13.00mm, and following bottom radius (77) is 2.125mm.