CN201726286U

CN201726286U - Slot coordination of small-sized efficient three-phase asynchronous motor

Info

Publication number: CN201726286U
Application number: CN2009202096836U
Authority: CN
Inventors: 袁建敏; 顾德军; 葛荣长; 吴艳红
Original assignee: Shanghai Electrical Apparatus Research Institute Group Co Ltd
Current assignee: Shanghai Electrical Apparatus Research Institute Group Co Ltd
Priority date: 2009-09-15
Filing date: 2009-09-15
Publication date: 2011-01-26
Anticipated expiration: 2019-09-15

Abstract

The utility model relates to a slot coordination of a small-sized efficient six-pole three-phase asynchronous motor. In the conventional small and medium-sized motor, the stator slot and rotor slot coordination is 36 to 28, and the slot number ratio is 1.286, and in the slot coordination provided by the utility model, the slot coordination is changed to 54 to 44, and the slot number is increased by 1.5 times. Calculation improves that the slot coordination has no starting problem and electromagnetic noise, and is applicable. Obtained data shows that by adopting the new slot coordination, the stray loss of the motor is lowered and the efficiency is improved. For the slot coordination 54 to 44, 44 not equals to 54 minus 6 and then minus 3, noise generated due to the stator and rotor once teeth harmonic wave inter-reaction is avoided. According to test model trial production, other performance indexes meet the standard after the new slot coordination is adopted.

Description

A kind of groove of small-sized efficient rate threephase asynchronous machine cooperates

Technical field

The groove that the utility model relates to a kind of small-sized efficient rate threephase asynchronous machine cooperates, and the groove that relates to a kind of 6 pole three phase asynchronous motors or rather cooperates, and promptly the selection and the coupling of stator coring groove number and rotor core groove number belong to technical field of motors.

Background technology

At present, global energy problem is very outstanding, and in order to solve energy shortage, various energy-conservation, product and measures are efficiently arisen at the historic moment.

In the multiplexe electric technology field, motor is an important electricity consumption product.Because middle and small motor is widely used in various fields on the market, its power consumption accounts for 2/3 of national industrial electric weight.

With respect to common motor, efficiently, the ultra high efficiency electric efficiency has had large increase, ultra high efficiency motor particularly, the efficient raising approaches 5%, at this situation, must all reduce by five lossies of motor (stator copper loss, rotor copper loss, iron loss, mechanical loss, stray loss), just can reach the optimum efficiency of raising the efficiency, if increase merely the iron of motor and copper etc. effectively material reduce stator copper loss, rotor copper loss, iron loss, can cause raw-material waste, raising the cost, is not the best approach that improves motor efficiency.

Studies show that, in the reduction of other losses, exploit potentialities, for threephase asynchronous, adopt at present by input power 0.5% estimation, the method for testing of stray loss has been covered the difference of different manufacturers design of electrical motor and workmanship, adopt after the IEEE112B method of the U.S., the stray loss of motor adopts actual measurement, and this just requires motor manufacturer need pay attention to design of electrical motor and workmanship more, reduces the stray loss of motor.

The efficiency of motor problem has caused social extensive concern, R﹠D work efficient, the ultra high efficiency motor that China has begun, the selection that the groove of motor cooperates, it is an important step of design of electrical motor, it not only influences the stray loss and the startability of motor, and is also closely related with the electromagnetic noise of motor simultaneously.

The loss of motor mainly contains stator copper loss, rotor copper loss, iron loss, mechanical loss, stray loss composition, in the R﹠D work of efficient, ultra high efficiency motor, each loss all needs to reduce, wherein stray loss be do not allow manageable, practice shows, cooperate by the groove that improves the motor stator and rotor, can reduce the stray loss of motor, improve the efficient of motor.

Summary of the invention

The purpose of this utility model is to provide a kind of groove of small-sized efficient rate threephase asynchronous machine to cooperate, the selection and the coupling of stator coring groove number and rotor core groove number by motor, so that reduce the stray loss of motor, thereby improve the efficient of motor, reach the purpose of energy savings.

For achieving the above object, the technical solution of the utility model is: it is 36/28 that the motor stator and rotor groove of prior art cooperates, and slot-number ratio is 1.286, groove is cooperated change 54/44 into, the groove number has increased by 1.5 times, slot-number ratio becomes 1.227, and by calculating, this groove cooperates and do not have startup problem and electromagnetic noise problem, from the data that draw as can be seen, after adopting new groove to cooperate, motor stray loss descends, and efficient rises.

See according to the advanced development situation, adopt new groove to cooperate after, other performance index meet the requirements, motor stray loss descends, efficient rises.

Simultaneously, interact according to slot ripples of stator and rotor and produce the condition of noise:

Q2＝Q1±i(i＝1、2、3)

Q2＝Q1±2p±i(i＝1、2、3)

P---number of pole-pairs (6 utmost point motor p=3)

Cooperating for groove is 36/28, and 28=36-6-2 exists slot ripples of stator and rotor to interact and produces the problem of noise;

Cooperating for groove is 54/44,44 ≠ 54-6-3, does not exist slot ripples of stator and rotor to interact and produces the problem of noise.

The beneficial effects of the utility model: after adopting groove of the present utility model to cooperate, the stray loss of motor descends about 59%.

Below in conjunction with drawings and Examples to the utility model detailed explanation of making comparisons.

Description of drawings

Fig. 1 (Fig. 1-1, Fig. 1-2) is original, the rotor punching schematic diagram that the groove of small-sized efficient rate threephase asynchronous machine cooperates;

Fig. 2 (Fig. 2-1, Fig. 2-2) is the stator and rotor punching schematic diagram that the groove of threephase asynchronous machine of the present utility model cooperates.

Embodiment

With reference to Fig. 1 (Fig. 1-1, Fig. 1-2), this is the stator and rotor 36/28 groove structural representation of the product of prior art.

With reference to Fig. 2 (Fig. 2-1, Fig. 2-2) is on the H160-6 11kW 380V motor basis, redefines electromagnetic scheme, changes stator and rotor groove number into 54 and 44 respectively, new stator and rotor sheet schematic diagram,

According to accompanying drawing 2, manufacture experimently two model machines; With two model machines that adopt former electromagnetic schemes of batch production, stator and rotor groove number is respectively 36 and 28, reduces technological fluctuation, and the motor of producing is tested, and method of testing is the IEEE112B method, the stray loss of actual measurement motor, and test result sees the following form.

The motor numbered slot cooperates stray loss (W)

1# model machine 36,/28 258.9 2# model machine 36,/28 254.6

3# model machine 54,/44 104.7 4# model machine 54,/44 108.5

Though the utility model is described with reference to the above embodiments; but those of ordinary skill in the art; will be appreciated that above embodiment is used for illustrating the utility model; should understand and wherein can make variations and modifications and do not break away from the utility model in a broad sense; so be not that conduct is to qualification of the present utility model; as long as in connotation scope of the present utility model, to the variation of above-described embodiment, the protection range that distortion all will fall into the utility model claim.

Claims

1. the groove of a small-sized efficient rate threephase asynchronous machine cooperates, and it is characterized in that:

It is 54/44 that described this motor stator and rotor groove cooperates, and slot-number ratio is 1.227, and the groove number has increased by 1.5 times.

2. the groove of small-sized efficient rate threephase asynchronous machine according to claim 1 cooperates, it is characterized in that: slot ripples of described stator and rotor interacts and produces the condition of noise, press Q2=Q1 ± i, i=1,2,3, Q2=Q1 ± 2p ± i, i=1,2,3.