CN102780355A

CN102780355A - Ultra-high-efficiency 250-watt six-pole three-phase asynchronous motor

Info

Publication number: CN102780355A
Application number: CN2012102574001A
Authority: CN
Inventors: 吕三元
Original assignee: CHONGQING LEERJIA MACHINERY Co Ltd
Current assignee: CHONGQING LEERJIA MACHINERY Co Ltd
Priority date: 2012-07-25
Filing date: 2012-07-25
Publication date: 2012-11-14

Abstract

An ultra-high-efficiency 250-watt six-pole three-phase asynchronous motor comprises a stator and a rotor. The external diameter and the internal diameter of each of the stator and the rotor, the core length and the number, the shape and the size of punching sheet slots are optimized and reasonably designed systematically to enable loss of a stator winding, a rotor winding and a core to be greatly reduced. With the 250-watt output power, compared with existing like products, the ultra-high-efficiency 250-watt six-pole three-phase asynchronous motor has the advantages that rotational speed is increased from 757r/min to 932r/min; total electric energy loss is decreased from 500.5w to 75.6w, and energy is saved by 84.90%; energy conversion efficiency is greatly increased from 33.3% to 76.8%, is increased by 43.5% and is 1.8% higher than the highest international grade standard of 75.0%; and since a central line of a stator cramp slot is designed to penetrate through the middles of two of the stator punching sheet slots, radial electromagnetic force waves in air gaps are weakened, electromagnetic vibration is reduced, and electromagnetic noise is reduced.

Description

250 watt of 6 pole three phase asynchronous motor of ultra high efficiency

Technical field

The present invention relates to a kind of motor, 250 watt of 6 pole three phase asynchronous motor of particularly a kind of ultra high efficiency.

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.

250 watt of 6 pole three phase asynchronous motor overwhelming majority using in the market is the IE1 grade; Its energy conversion efficiency is 59.0%; A small amount of IE2 grade is also arranged, and its energy conversion efficiency has risen to 73.0%, 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 250 watt of 6 pole three phase asynchronous motor, rotor and core length thereof, punching groove number, flute profile and size are optimized design; Through its running wastage of comprehensive reduction; Reach and guaranteeing that power output is under 250 watts the prerequisite, 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 250 watt of 6 pole three phase asynchronous motor of a kind of ultra high efficiency, 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 stator outer diameter is 12.50cm, and diameter of stator bore is 8.00cm, and the length of stator core is 8.50cm; The quantity of described stator punching groove is 36 and evenly distributes in the form of a ring that the flute profile of stator punching groove is tiltedly to take on round bottomed vessel, and wherein width of rebate is 2.20mm; The notch height is 0.80mm, and groove top is 8.50mm deeply, and groove shoulder breadth degree is 4.20mm; Groove shoulder height degree is 0.346mm, and bottom radius is 2.75mm, and described stator cramp groove center line passes in the middle of two grooves of stator punching groove; Described rotor diameter is 7.96cm, and the rotor internal diameter is 2.00cm, and the length of rotor core is 8.50cm; The quantity of described rotor punching groove is 34 and evenly distributes in the form of a ring that the flute profile of rotor punching groove is the dome round bottomed vessel, and wherein the notch height is 0.60mm; Groove top is 6.50mm deeply, and groove top radius is 1.75mm, and bottom radius is 1.25mm.

The invention has the beneficial effects as follows that because quantity, flute profile and the size of external diameter, internal diameter, core length and the punching groove of stator and rotor have been carried out systematic optimization appropriate design make the stator winding loss have only 47.6W, the rotor winding loss has only 18.6W; Core loss has only 3.2W, comprises stray loss 3.8W, mechanical loss 2.4W; Its energy total losses amount only has 75.6W, and the loss of existing 250 watt of 6 pole three phase asynchronous motor stator winding has 384.5W, and the rotor winding loss has 86.3W; Core loss has 24.4W; Comprise stray loss 3.8W, mechanical loss 1.5W, its energy total losses amount has 500.5W; The energy loss amount of wanting required for the present invention has reduced 84.90%, has practiced thrift the energy greatly; Be all in power output under 250 watts the prerequisite, the input power that existing like product needs is 0.750kW, and energy conversion efficiency is 33.3%; And input power required for the present invention is merely 0.326kW; Energy conversion efficiency reaches 76.8%, has improved 43.5%, with the highest ranking IE3 of international motor efficiency classification standard the efficiency standard requirement 75.0% of 250 watt of 6 pole three phase asynchronous motor is compared; Energy conversion efficiency has improved 1.8%, has improved energy conversion efficiency greatly; Simultaneously, the stator phase current has dropped to 0.76A from 2.07A, has reduced by 63.26%; Rotating speed has risen to 932r/min from 757r/min, has accelerated 175r/min; Because stator cramp groove center line is designed in the middle of two grooves of stator punching groove, pass, weakened the radial electromagnetic force ripple in the air gap, reduced electric and magnetic oscillation, reduced electromagnetic noise.

Description of drawings

Fig. 1 is the sectional structure sketch map of 250 watt of 6 pole three phase asynchronous motor of ultra high efficiency 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. rotor internal diameters, 12. stator outer diameters; 61. width of rebate, 62. notch height, 63. groove tops are dark, 64. groove shoulder breadth degree, 65. groove shoulder height degree; 66. bottom radius, 71. notch height, 72. groove tops are dark, 73. groove top radiuses, 74. bottom radius.

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 250 watt of 6 pole three phase asynchronous motor; Different places is that stator outer diameter 12 is made 12.50cm, and diameter of stator bore 8 is made 8.00cm, and the quantity of stator punching groove 6 is made 36 and evenly distribution in the form of a ring; The flute profile of stator punching groove 6 is made oblique shoulder round bottomed vessel, and wherein width of rebate 61 is made 2.20mm, and notch height 62 is made 0.80mm; 8.50mm is made on groove top dark 63, and groove shoulder breadth degree 64 is made 4.20mm, and groove shoulder height degree 65 is made 0.346mm; Bottom radius 66 is made 2.75mm; Stator cramp groove center line 9 is passed in the middle of two grooves of stator punching groove 6, be assembled into stator core 4 then, the length of stator core 4 is made 8.50cm; Again rotor diameter 10 is made 7.96cm, rotor internal diameter 11 is made 2.00cm, the quantity of rotor punching groove 7 is made 34 and evenly distribution in the form of a ring; The flute profile of rotor punching groove 7 is made the dome round bottomed vessel; Wherein notch height 71 is made 0.60mm, and 6.50mm is made on groove top dark 72, and groove top radius 73 is made 1.75mm; Bottom radius 74 is made 1.25mm, then the length of rotor core 5 is made 8.50cm; Other part is made 250 watt of 6 pole three phase asynchronous motor according to commonsense method, promptly accomplishes the making of 250 watt of 6 pole three phase asynchronous motor of ultra high efficiency.

Through check, the present invention compares with existing general 250 watt of 6 pole three phase asynchronous motor of Y2-712 type, draws contrast difference such as following table.

The architectural difference comparison sheet of the present invention and traditional 250 watt of 6 pole three phase asynchronous motor.

Figure 2012102574001100002DEST_PATH_IMAGE001

The performance difference comparison sheet of the present invention and traditional 250 watt of 6 pole three phase asynchronous motor.

From showing and can find out, the present invention compares with existing general 250 watt of 6 pole three phase asynchronous motor of Y2-712 type, and the stator phase current has dropped to 0.76A from 2.07A, has reduced by 63.26%; Rotating speed has risen to 932r/min from 757r/min, has accelerated 175r/min; Energy conversion efficiency has brought up to 76.8% from 33.3%; With the highest ranking IE3 of international motor efficiency classification standard the efficiency standard requirement 75.0% of 250 watt of 6 pole three phase asynchronous motor is compared; Energy conversion efficiency has improved 1.8%, has improved energy conversion efficiency greatly.

The input power of wanting required for the present invention has dropped to 0.326kW from 0.750kW, and energy total losses amount has dropped to 75.6W from 500.5W, has reduced 84.90%, has practiced thrift the energy greatly.

Claims

1. 250 watt of 6 pole three phase asynchronous motor of ultra high efficiency; 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 stator outer diameter (12) is 12.50cm, and diameter of stator bore (8) is 8.00cm, and the length of stator core (4) is 8.50cm;

The quantity of described stator punching groove (6) is 36 and evenly distributes in the form of a ring; The flute profile of stator punching groove (6) is tiltedly to take on round bottomed vessel, and wherein width of rebate (61) is 2.20mm, and notch height (62) is 0.80mm; Groove top dark (63) is 8.50mm; Groove shoulder breadth degree (64) is 4.20mm, and groove shoulder height degree (65) is 0.346mm, and bottom radius (66) is 2.75mm;

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

Described rotor diameter (10) is 7.96cm, and rotor internal diameter (11) is 2.00cm, and the length of rotor core (5) is 8.50cm;

The quantity of described rotor punching groove (7) is 34 and evenly distributes in the form of a ring; The flute profile of rotor punching groove (7) is the dome round bottomed vessel; Wherein notch height (71) is 0.60mm; Groove top is that (72) are 6.50mm deeply, and groove top radius (73) is 1.75mm, and bottom radius (74) is 1.25mm.