CN2097469U - High-efficiency three-phase multi-speed asynchronous motor - Google Patents

Abstract

The utility model discloses a high-efficiency three-phase multi-speed asynchronous motor, which is the improvement of a common used or stored multi-speed motor with JD02 series. A simplex winding which can be converted to 6/4 pole is specifically divided into a part of 3Y connection in parallel and a part of Y simplex path, wherein, the number of turns of the 3Y winding is 2-3.5 times larger than that of the Y winding; the diameter of the corresponding lines of the 3Y winding is 1/2-2/7 times larger than that of the Y winding, being set according to design task. The winding coefficient of the fundamental wave of the motor of the utility model is improved; the frequency and the amplitude value of the magnetic potential of harmonic are decreased. The efficiency of the motor is high, the temperature increment is low, and the performance indexes of all items of starting, overload, noise vibration, power factor, etc. are all achieved or are superior to the standards of the YD series motor with same power and speed ratio.

Description

High-efficiency three-phase multi-speed asynchronous motor

The utility model relates to a kind of efficient three-phase polyspeed asynchronous motor.Further be meant the improvement of JD02 series variable-pole multi-speed motor stator winding, also be adapted to improvement simultaneously YD flanker motor.

The JD that the sixties grow up in China, JD02 series variable-pole multi-speed motor, the at present tested YD series multiple-speed motor of making merit and having a late nineteen seventies international most advanced level progressively replaces.This is because JD02 series motor technology economic performance is lower than YD series: efficient (weighted average) low 4.7%, power factor is low by 5.3%, and locked-rotor torque is low by 25%, and the electric machine temperature rise of same bulking value power is slightly high, and noiseless vibration regulation is appointed as obsolete product by country.Will undergo technological transformation on the other hand and also face the reality that remains to be taked the high-tech processing: the history in existing more than 20 year of JD02 serial motors production, this product has been widely used in national economy all departments, is still using or is storing in a warehouse standby so far.Therefore, carry out suitable technological transformation if can reach several hundred million yuan existing JD02 serial motors to total value, reach higher economic and technical norms, then not only make user's economic loss minimum in superseded motor is used instead of this product, also can make motor manufacturing firm release a new product at this point and replace.The purpose of this utility model, just provide that a kind of stator winding to existing JD02 serial motors is improved, called after JD02(G) the efficient three-phase polyspeed asynchronous motor of remodeling of series, make it satisfy following specification requirement: (1) JD02(G) installation dimension of serial motor is identical with JD02, and the preparation relation of capacity is in full accord.Like this, originally the main frame of adapted JD02 motor can change easily and join JD02(G) motor.(2) main performance index such as the efficient of serial motor and power factor, breakdown torque, locked-rotor torque and locked rotor current JD02(G) must reach or be better than the YD serial motors level of same power, rotating ratio.

Design of the present utility model is on the basis of existing JD02 serial motors, only its stator winding is improved and realizes.Improvement is to adopt " simultaneously oppositely commutation method " pole-changing, wherein has half winding oppositely or revert all, and every phase only keeps 1/3 winding and belong to constantly mutually, and each all changes and belongs to other two-phases all the other 2/3 windings again.Simultaneously,, can adopt whole windings reverse flexibly according to designing requirement, or therein certain utmost point insert, the cut-out winding.

Existing mature technology " reverse method " and " commutation method " lumped together on connection and the principle and produce new superior function and make each utmost point electromagnetic waveforms of speed change all near sinusoidal wave, improve fundamental wave winding coefficient, reduce harmonic number or amplitude, make the efficient raising down of each speed of motor, power factor and other every performances have bigger improvement than JD02 serial motors, reach or be better than the performance index of YD serial motors.

Now with JD02-62-6/4(G) the efficient three-phase polyspeed asynchronous motor of stator 36 grooves designs is example, exemplifies the efficient multispeed electric machine of YDS280M-6/4 stator 72 grooves simultaneously, in conjunction with following accompanying drawing the utility model is elaborated.

Brief description of drawings:

Fig. 1 is three-phase 6/4 utmost point 36 groove double speed developed winding diagrams.

Fig. 2 is three-phase 6/4 utmost point 72 groove double speed developed winding diagrams.

Fig. 3 is three-phase 6/4 utmost point 36 groove winding end line connection layouts.

Fig. 4 is three-phase 6/4 utmost point 72 groove winding end line connection layouts.

Fig. 5 is 6/4 pole motor pole-changing elementary diagram.

One, variable-pole winding scheme

The modern employing a kind of being called " simultaneously reverse commutation method " arranged winding, gets the 3Y+Y tie lines.

1, two kinds of windings: a kind of 3Y part winding that is called, a kind of Y part winding that is called.Generally speaking, the 3Y part winding coil in parallel number of turn is 3 times of the Y single channel number of turn, and the former is the latter's 1/3 for corresponding line footpath; According to each utmost point of load operation special requirement, the utility model also allows the number of turn, the line of two part windings directly to concern to have some change.But its scope is: 3Y coil and Y coil ratio are in 2 to 3.5 times.Corresponding line directly than, the 3Y coil is 1/2 to 2/7 of a Y coil.Whole motor 3/4 groove number embeds the 3Y coil, is the Y coil in the 1/4 groove number.

2, three-phase 36 grooves 6/4 utmost point variable-pole winding is arranged as shown in Figure 1, and Arabic numerals 1,2 among the figure ... 36 to represent iron core slot number and coil number, the principle of numbering be that place, limit, the upper strata groove of coil and coil is compiled and is jack per line.The upper and lower layer limit of 2 two repeatedly windings of line representative in every groove.Wherein solid line and chain-dotted line are represented the limit, upper strata of 3Y, Y coil sections respectively, and dotted line then is the lower floor limit.Wherein 27 groove numbers embed the 3Y coil, are the Y coil in 9 grooves, coil span Y1=1-8.Between adjacent windings and the line organized mutually between coil of the utmost point be painted on winding overhang one side.Limit because full figure divides two halves to draw institute, this coil connecting line of numerical code expression connects other half figure coil number by the end line.So constitute the three-phase winding that changes. Label 1U, 1V, 1W, 2U, 2V, 2W represent 6 leading-out terminal signs respectively.With 4 very basic utmost point phase-splittings.

72 grooves, 6/4 utmost point variable-pole winding is arranged as shown in Figure 2.It is consistent that groove number, coil number, each slot-line-type mark, leading-out terminal mark principle and 36 groove figure illustrate, only groove number, coil number increase by 1 times.54 3Y coils, 18 Y coils, pitch Y1=1-15.

According to the 4 very basic utmost points, adopt " simultaneously oppositely commutation method " to be transformed to after the utmost point 6 utmost point composite design utmost points organize mutually, the outlet radical, more above-mentioned coil is coupled together, mainly be the effect of following end connecting line.

3, winding overhang structure.Show that from Fig. 1, Fig. 2 developed winding diagram finds out, complicated groove winding essence is the repetition of Line 1 circle crossheading number, and visible rule is same as two repeatedly windings of conventional motor.Wiring and the end construction difference that is characterised in that between each coil of the present utility model: two repeatedly very per two coils of winding 6 of (1) conventional 36 grooves are that a utmost point is organized mutually, 4 very per 3 coils are that a utmost point is organized mutually, and that the utility model has respectively is single, 2,3 coils are that a utmost point is organized mutually.It is that a utmost point is organized mutually that 72 grooves, 6/4 utmost point then has 2,4,6 coils respectively.Each utmost point is organized the adjacent groove of interior loop mutually and is connected.(2) the conventional winding utmost point is organized coil mutually and is connected and to be generally that every pair of utmost point is organized repetition mutually and this variable-pole winding is organized coil mutually because of each utmost point and do not waited, so the connection of the utmost point between organizing mutually generally do not have the part of repetition.So connecting, the end undertaken by following explanation.

Fig. 3 lists the 36 slot coil orders of connection and winding overhang circuit diagram.Each Arabic numerals is represented coil number, reversal connection (is that lower floor's limit outlet inserts from tail end) is represented in band "-" (as 8,24), number top, and number top unmarked (as 1,6) expression is along connecing (is that the outlet of limit, upper strata inserts from the coil head end).The utmost point is organized a line mutually and is promptly linked to each other by root by this regulation, and picks out 6 lead-out wire 1U from respective point ... 2W.

Fig. 4 lists the 72 slot coil orders of connection and winding overhang winding diagram.Each Arabic numerals is represented coil number, and number top band "-" represent reversal connection, and the number unmarked expression in top is suitable to be connect, and picks out 6 lead-out wire 1U from respective point ... 2W.

As seen the utility model can be paid no attention to Fig. 1,2 in implementing, and the footpath row carries out winding overhang by Fig. 3,4 and connects the easiest.And rule is same as conventional two iterated line graph.

Two, pole changing principle

Motor leading-out terminal (and the coil that is connected number, all can find from Fig. 1,2,3,4), the sign phase-splitting is as shown in table 1 when 6 utmost points and 4 utmost points.

Table 1 is that the motor leading-out terminal indicates phase-splitting when 6 utmost points and 4 utmost points.

Because every 3Y and Y two parts of being divided into mutually by 6 lead-out wires, change the three-phase winding connection and realize pole-changing.When A, B, C three-phase current such as Fig. 5 a flow into from 1U, 1V, 1W, three-phase is connected into 3Y and connects, and then the three-phase stator winding magnetic potential forms 4 utmost point rotating magnetic fields.When three-phase current such as Fig. 5 b flow into from 2U, 2V, 2W, then 3Y part winding is reverse, and every phase only keeps 1/3 winding and belongs to constant mutually, each all changes other two-phases of genus to all the other 2/3 windings again, promptly constitute oppositely commutation simultaneously, sealed in Y part winding again, when three-phase so constituted 3Y+Y, three-phase stator winding was transformed to 6 utmost point rotating magnetic fields.When supply frequency f=50 hertz, drive rotor by such two kinds of connections respectively and rotate with nearly 1500 rev/mins or 1000 rev/mins.

Three, mechanical parts structure

Member of the present utility model is selected general part such as support, end cap, bearing cap, stator core, rotor and the standard component etc. of conventional motor for use as far as possible.Also can redesign stator and rotor punching and iron core according to actual needs.

The utility model compared with prior art has following advantage:

1, variable-pole winding scheme of the present utility model has each and extremely descends magnetic potential fundamental voltage amplitude height, outstanding advantage that the high order harmonic component amplitude is low, and mmf wave is bordering on sinusoid.The JD02 in past and present YD series 6/4 utmost point double-speed motor, employing be the △/2Y connection of " oppositely " method pole-changing.6 180 ° of facies tracts very, every phase groove vector is distributed as 1,2,3,3,2,1, and winding distribution ratio 6 is kd6=0.8365 very; 4 120 ° of facies tracts very, every phase groove vector is distributed as 2,2,2,2,2,2,4 utmost point winding distribution ratio kd4=0.9254.After tested, owing in the mmf wave stronger high order harmonic component is arranged, so no-load current and no-load loss are bigger, efficient and power factor are on the low side, and starting performance is relatively poor.The utility model adopts 6/4 utmost point 3Y+Y/3Y variable-pole winding scheme of " oppositely commutation simultaneously " method, 6 90 ° of facies tracts very, and every phase groove vector is distributed as 3,6,3, kd6=0.9106,4 60 ° of facies tracts very, every phase groove vector is distributed as 3,3,3, kd4=0.96.Obvious the utility model fundamental wave winding coefficient height, high order harmonic component obviously weakens simultaneously, so efficient improves, every performance also significantly improves.

Be embodiment of the present utility model below.

Example 1 is JD02-62-6/4(G), 17/9KW and 15/9KW simplex winding two-speed motor are made by 36 groove pole-changing schemes.Type approval test proves that each rotating speed shelves performance reaches ZBK22007-88 " Y series (IP44) three-phase asynchronous electric (seat No. 80-315) technical conditions ".Be better than JB/DQ3165-86 " YD series (IP44) pole-changing multi-speed 3-phase asynchronous motor technical conditions ".Every performance data value sees Table 2.

Example 2 is the YDS280M-6/4 by the trial-production of 72 groove variable-pole winding schemes, 55/72KW simplex winding two-speed motor.Type approval test data and standard value (YD standard), design load see Table 3.Its performance is better than YD serial motors standard, near each rotating speed shelves single-speed motor standard.Iron core shortens 45mm, and temperature rise reduces more than the 10K, and as seen, the utility model winding scheme not only is used for eliminating the reducing energy consumption of motor, and also the energy-saving electric machine performance of promoting applicable to country is transformed and the joint material.

Claims (3)

1, a kind of stator winding to existing JD02 series motor is improved efficient three-phase polyspeed asynchronous motor in addition, also be applicable to improvement to YD series motor, it is characterized in that stator winding is the simplex winding that can be converted to 6/4 electrode structure, concrete two parts that divide: a kind of 3Y winding that is called, a kind of Y winding that is called, the 3Y winding coil number of turn in parallel is 2 times to 3.5 times of the Y single channel number of turn, the corresponding line of 3Y coil directly is 1/2 to 2/7 of Y winding wire footpath, decide according to design objective, whole motor 3/4 groove number embeds the 3Y coil, in the 1/4 groove number is the Y coil, and 6 terminals are only arranged.

2, motor as claimed in claim 1 is characterized in that number of stator slots and coil sum are all 36,27 3Y coils is wherein arranged, 9 Y coils, pitch Y1=1-8.

3, motor as claimed in claim 1 is characterized in that number of stator slots and coil sum are all 72,54 3Y coils wherein, 18 Y coils, pitch Y1=1-15.

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