CN2103217U

CN2103217U - Wide velocity ration four-speed asynchronous motor

Info

Publication number: CN2103217U
Application number: CN 91205459
Authority: CN
Inventors: 周曼金; 史守勤; 王利国
Original assignee: DALIAN RAILWAY COLLE
Current assignee: DALIAN RAILWAY COLLE
Priority date: 1991-04-03
Filing date: 1991-04-03
Publication date: 1992-04-29

Abstract

The utility model discloses a wide velocity ration four-speed asynchronous motor, comprising a motor body, a stator winding and a squirrel-cage rotor. The stator winding is single full-load three-phase winding, the utility model adopts a full-groove electrical potential star-embedded line structure, the wide velocity ration kv=6, the four-velocity ration is that when zl=36, then 2 pi=2/4/6/12, and when zl=72, then 2 pi=4/8/12/24. The utility model utilizes a new three-phase winding inserted line structure to develop the speed changing grade of the pole-changing multiple-speed asynchronous motors; the utility model has the advantages of light weight, low cost, multiple speed-changing grades and broad speed ratio, and therefore, the utility model can be used for hoisting machines, precision machine tools and other engineering fields.

Description

Wide velocity ration four-speed asynchronous motor

Speed ratio Kv=2～3～6 of wide speed ratio four speed asynchronous motor described in the utility model are the transmissions of precision machine tool speed change, as the molding machine variable speed drives, and needed novel speed change asynchronous motor in other engineering field.

The three-phase speed change asynchronous motor that is had in the prior art field all adopts two cover windings at present, belongs to this type as the how fast machine series products of YD.With the JF31-2/4/6/12 motor is that its specifications parameter of example (referring to 274 pages of the electric world 1964 the 7th phases) is as shown in the table:

Four speed asynchronous motor models	The JF31-2/4/6/12-L3 type
					Number of poles	2	4	6	12
Synchronous speed (rev/min)	3000	1500	1000	500
					Power output (watt)	250	180	100	80
Efficient (%)	53	51	56	40
					Power factor	0.85	0.74	0.60	0.42
Starting torque/nominal torque	0.9	0.85	2.0	2.0
					Breakdown torque/nominal torque	2.0	2.0	2.0	2.0

With prior art and relevant parameter comparison of the present utility model as can be known, the utilance of copper cash has only 50% in the prior art at present, and weight is big, the consumption problem that copper is many, cost is high so have; And power output is too low during owing to motor low speed, is difficult to provide the motor that size is little, power output is high.Also there are problems such as the different seat No. kinds of inefficiency, different capacity are few simultaneously.At existing problem in the above-mentioned prior art, design a kind of novel structure, multiple functional, cheap new molded breadth speed ratio four speed asynchronous motor, be very necessary thereby overcome the existing problem that exists.

In view of existing problem in the above-mentioned prior art, the purpose of this utility model is a kind of novel structure of design, advanced in performance, the copper loss amount is few, power output is big, efficient is high, cost is low new molded breadth speed ratio four speed asynchronous motor.The utility model is wide speed ratio asynchronous motor, and its mechanical structure and Y type motor are basic identical.But the rule structure difference to its internal stator three phase windings makes its stator winding have brand-new syndeton, thereby forms a kind of novel many specification four speed asynchronous motor.Can simplify or omit gear existing and electric drilling match by application of the present utility model.So can satisfy in different field needs to variable speed electric motors, particularly.So the utility model is a kind of practical new molded breadth speed ratio four speed asynchronous motor that are suitable for.

Wide speed ratio four speed asynchronous motor described in the utility model are made of support, stator core, stator winding, rotor, rotating shaft.Its feature as shown in drawings, stator winding is single cover full load three phase windings, adopts table 1 and the represented full groove electromotive force star rule structure of table 2, its wide speed ratio Kv=6, its four speed level is: work as Z1=36, then 2Pi=2/4/6/12; Work as Z1=72, then 2Pi=4/8/12/24.Single cover full load three phase windings grouping wiring construction described in the utility model as shown in Figure 2.Single cover load three phase winding neutron windings described in the utility model are the pole-changing wiring.Constituted by 27 three phase winding lead-out wire terminals.Each three phase winding lead-out wire terminal all is fixed on the insulation joint plate.Three phase winding lead-out wire terminals are drawn from four lead-out wire holes and are divided into four groups, and wherein every group has three phase winding lead-out wire number of terminals and be respectively six, six, seven, eight.And count 2Pi=2/4/6/12 corresponding to pole-changing, its connection be M=2 △/

/ 2Y/Y.

Wide speed ratio four speed asynchronous motor described in the utility model can replace existing variable speed electric motors, particularly, thereby have increased new serial variable speed electric motors, particularly for application.Adopt the major advantage that the utility model had to be: (1) the utility model is the four speed asynchronous motor of a kind of novel many specifications Kv=2～3～6 times.Can be used as the speed-changing driving device of equipment such as drilling machine, precision machine tool, rubber machine.(2) the utlity model has characteristics such as in light weight, that power output is big, efficient is high, save raw material, cost is low.(3) motor weight range provided by the utility model is 17 kilograms, 22 kilograms, 27 kilograms, 34 kilograms, 38 kilograms, 43 kilograms, 68 kilograms, 81 kilograms, 123 kilograms, 145 kilograms totally 10 kinds of specifications.Its power is used four fast serial motor of ten kinds of different capacity grades of 2P=2 motor power (output) representative from 0.45 watt thousand～12 watts thousand.Because the utility model is a kind of polyspeed asynchronous motor that comprises low-speed machine, so can adapt to the needs in production development and market, for electromechanical integration contributes.The utility model is compared with the same weight motors with two cover windings of the same type, and its power output will exceed 20～50%, efficient exceeds 2～5%.And can save copper and silicon steel agreement that contracts a film or TV play to an actor or actress about 20%, can reduce cost about 20%.Therefore extensive use of the present utility model; Economic benefit that is produced and social benefit are very significant.

The utility model has eight accompanying drawings, and wherein accompanying drawing 1 is the structural representation of wide speed ratio four speed asynchronous motor.

Accompanying drawing 2 is sub-winding grouping winding diagrams of 2Pi=2/4/6/12.

Accompanying drawing 3 is binding post connecting line construction figure.

Accompanying drawing 4 is that the A-A of accompanying drawing 3 is to diagrammatic sketch.

Accompanying drawing 5 is three phase windings, two utmost point wiring construction figure.

Accompanying drawing 6 is three phase windings, four utmost point wiring construction figure.

Accompanying drawing 7 is three phase winding sextupole wiring construction figure.

Accompanying drawing 8 is three phase windings, 12 utmost point wiring construction figure.

Among the figure: 1, support 2, stator core 3, stator winding 4, rotor 5, rotating shaft 6, terminal block 7, square head bolt 8, plain washer 9, nut 10, spring pad 11, three phase winding lead-out wire terminals 12, lead-out wire hole

Specific embodiment of the utility model as shown in Figure 1, its structure is made up of support (1), stator core (2), stator winding (3), rotor (4), rotating shaft (5).In the said structure except that the rule structure of three-phase stator winding (3) with the lead end structure is different with Y type motor, all the other are all identical.At stator core (2) but notch in embed single cover pole-changing threephase stator winding coil (3).Its embedded structure is full groove electromotive force star rule structure as shown in Table 1 and Table 2.In order under the simplex winding condition, to obtain four speed, introduce the particular form of sub-winding branch set of connections, as shown in Figure 2.Coil connecting line construction under every kind of number of poles, rotating speed is all inequality, works as Z1=36, adopts the connecting line construction shown in the table 1 during 2Pi=2/4/6/12.Work as Z1=72, adopt the connecting line construction shown in the table 2 during 2Pi=4/8/12/24.Motor windings lead terminal structure is shown in accompanying drawing 3, accompanying drawing 4, and three phase winding neutron windings are the pole-changing wiring, are made of 27 three phase winding neutron winding lead-out wire terminals (11).Each three phase winding lead-out wire terminal (11) is fixed on the insulation joint plate (6) by square head bolt (7), plain washer (8), nut (9) and spring pad (10).Three phase winding lead-out wire terminals (11) are drawn from four lead-out wire holes (12) and are divided into four groups, wherein every group of number with three phase winding lead-out wire terminals (11) is respectively six, six, seven, eight, and count 2Pi=2/4/6/12 corresponding to pole-changing, its connection be M=2 △/

/ 2Y/Y.For being fixed on four group of three phase winding lead-out wire terminal (11) on the terminal block (6), thereby can obtain wide speed ratio four speed asynchronous motor by different wiring constructions as two utmost points, four utmost points, sextupole and 12 utmost points of three phase windings in accompanying drawing 5～accompanying drawing 8.

Full groove electromotive force star rule table table 1

Claims

1, a kind of wide speed ratio four speed asynchronous motor are made of support (1), stator core (2), stator winding (3), rotor (4), rotating shaft (5); It is characterized in that stator winding (3) for single cover full load three phase windings, adopts table 1 and the represented full groove electromotive force star rule structure of table 2, its wide speed ratio Kv=6, its four speed level is: work as Z1=36, then 2Pi=2/4/6/12; Work as Z1=72, then 2Pi=4/8/12/24.

2, wide speed ratio four speed asynchronous motor according to claim 1 is characterized in that single cover full load three phase winding neutron windings grouping wiring construction as shown in the figure.

3, wide speed ratio four speed asynchronous motor according to claim 1 and 2, it is characterized in that single cover full load three phase winding neutron windings are the pole-changing wiring, constituted by 27 three phase winding lead-out wire terminals (11), each three phase winding lead-out wire terminal (11) all is fixed on the insulation joint plate (6), three phase winding lead-out wire terminals (11) are drawn from four lead-out wire holes (12) and are divided into four groups, wherein every group of number with three phase winding lead-out wire terminals (11) is respectively six, six, seven, eight, and count 2Pi=2/4/6/12 corresponding to pole-changing, its connection be M=2 △/ / 2Y/Y.