CN209571932U - A kind of multiplication of voltage threephase asynchronous - Google Patents
A kind of multiplication of voltage threephase asynchronous Download PDFInfo
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- CN209571932U CN209571932U CN201920247562.4U CN201920247562U CN209571932U CN 209571932 U CN209571932 U CN 209571932U CN 201920247562 U CN201920247562 U CN 201920247562U CN 209571932 U CN209571932 U CN 209571932U
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Abstract
The utility model discloses a kind of multiplication of voltage threephase asynchronouses, including stator and rotor, wherein stator is formed by base and by wound stator iron core, and having wound stator iron core includes stator core and the coil windings in its slot, and rotor is made of shaft and cast-aluminum rotor.Parallel connection number is 2 tunnels when the utility model motor low pressure, and parallel connection number is 1 tunnel when high pressure；It generally, is 2Y/Y connection (corresponding low-voltage/high voltage) to the motor of rated power < 4kW；It is 2 △/delta connection (corresponding low-voltage/high voltage) to rated power >=4kW motor.The utility model uses concentric type unequal-turn Distributed Winding, and this winding relatively waits circles double-layer overlapped to have more flexible design space around winding, the design that every slot conductor number is equivalent to small several levels may be implemented.
Description
Technical field
The utility model belongs to technical field of motors, and in particular to a kind of multiplication of voltage threephase asynchronous.
Background technique
Threephase asynchronous machine (Triple-phase asynchronous motor) is one kind of induction conductivity, is to lean on
A kind of motor for accessing 380V three-phase alternating current (120 degree of phase difference) power supply simultaneously, due to turning for threephase asynchronous
Son is from stator rotating excitation field revolving speed in the same direction, different at rotation, and there are revolutional slips, so being three-phase asynchronous electric
Machine.The revolving speed of three-phase asynchronous motor rotor is lower than the revolving speed of rotating excitation field, and rotor windings are because there is opposite fortune between magnetic field
It moves and generates electromotive force and electric current, and generate electromagnetic torque with magnetic field interaction, realize energy conversion.
It is well known that the currently used winding type of threephase asynchronous has single layer and bilayer；Single-layer Windings be exactly
The winding of a coil effective edge is only set in each stator slot, thus its coil sum only has the half of the total slot number of motor,
The advantages of Single-layer Windings is that winding coil number lacks that technics comparing is simple, and without layer insulation therefore the utilization rate of slot improves, single layer knot
Alternate breakdown fault etc. will not occur for structure, and disadvantage is then that the electromagnetic waveforms that winding generates are not ideal enough, the iron loss and noise of motor
All larger and starting performance is also slightly worse, therefore Single-layer Windings are normally only used in low capacity asynchronous motor.Single-layer Windings are according to it
The shape of coil and the difference of termination portion arranged can be divided into chain type winding, intersect chain type winding, Concentrical winding and friendship
Several winding configurations such as the concentric winding of V shape, bilayer be mainly double-layer overlapped around.
Every slot conductor number of threephase asynchronous stator is a very important parameter, it directly influences motor
Performance indicator, such as efficiency, power factor, locked-rotor torque, locked rotor current, torque capacity etc..Such case is usually had, is passed through
The every slot conductor number of stator when design calculates discovery electric machine combination property index preferably is decimal；At this moment, common technological means
It is to increase winding parallel number, every slot conductor number can be made from decimal to become integer or close to integer in this way.
But for multiplication of voltage threephase asynchronous (such as 220/440V), winding connection mode is only 2 △/△ or 2Y/
It connects when Y, i.e. " low pressure " for 2 △ or 2Y, when " high pressure " connects for △ or Y, can not make every slot conductor by increasing winding parallel number
Number from decimal becomes integer or close to integer.
Summary of the invention
In view of above-mentioned, the utility model provides a kind of multiplication of voltage threephase asynchronous, is able to solve the prior art and is answering
To " helpless " of the multiplication of voltage threephase asynchronous when best every slot conductor number is decimal.
A kind of multiplication of voltage threephase asynchronous, including stator and rotor, stator include base and are fixed on inboard wall of base
Have a wound stator iron core, it is described that have wound stator iron core include stator core and the coil windings in its stator slot,
Rotor includes shaft and the cast-aluminum rotor that is mounted in shaft；The coil windings use concentric type unequal-turn Distributed Winding.
Further, the stator core is overrided to form by the high-quality cold rolling electrical steel sheet of thickness 0.5mm.
Preferably, the cast-aluminum rotor is by the high-quality cold rolling electrical steel sheet of thickness 0.5mm and the molten aluminum of high temperature melting
Die casting is integral.
Further, the mode of connection of the coil windings is that (correspondence is low by 2 △/△ (corresponding low pressure/high pressure) or 2Y/Y
Pressure/high pressure), i.e., when motor is low pressure operation, the number in parallel of coil windings is 2；When motor is high-voltage operation, line
The number in parallel for enclosing winding is 1.
Further, for the motor of rated power < 4kW, coil windings use the 2Y/Y mode of connection；For volume
Determine power >=4kW motor, coil windings use 2 △/delta connection mode.
The utility model is by using concentric type unequal-turn Distributed Winding, compared to equal circles double-layer overlapped around winding with cleverer
The design that every slot conductor number is equivalent to small several levels may be implemented in design space living.
Detailed description of the invention
Fig. 1 is the double-layer overlapped of 72 slot, 6 pole span 10 (i.e. 1~11) around winding connection schematic diagram.
Fig. 2 is that 72 slot 6 pole concentric type (span 11/9/7) the unequal turns winding parallel connection number of the utility model is that 1 wiring is shown
It is intended to.
Fig. 3 is that 72 slot 6 pole concentric type (span 11/9/7) the unequal turns winding parallel connection number of the utility model is that 2 wiring are shown
It is intended to.
Fig. 4 is 72 slot, the 6 every slot conductor number of pole embodiment concentric type (span 11/9/7) unequal turns winding of the utility model
Schematic diagram.
Specific embodiment
In order to more specifically describe the utility model, with reference to the accompanying drawing and specific embodiment is to the utility model
Technical solution is described in detail.
The utility model multiplication of voltage threephase asynchronous, including stator and rotor, wherein stator by base and has winding to determine
Sub- iron core composition, having wound stator iron core includes stator core and the coil windings in its slot, and rotor is by shaft and cast aluminium
Rotor composition；Stator core is overrided to form by the high-quality cold rolling electrical steel sheet of thickness 0.5mm, and cast-aluminum rotor is by thickness 0.5mm
High-quality cold rolling electrical steel sheet and the molten aluminum of high temperature melting be cast into an entirety.
The utility model multiplication of voltage threephase asynchronous uses concentric type unequal-turn winding, and this winding relatively waits circles double-layer overlapped
There is more flexible design space around winding, the design that every slot conductor number is equivalent to small several levels may be implemented.
The utility model multiplication of voltage threephase asynchronous, parallel connection number is 2 tunnels when low pressure, and parallel connection number is 1 tunnel when high pressure；
It generally, is 2Y/Y connection (corresponding low-voltage/high voltage) to the motor of rated power < 4kW, to rated power >=4kW electricity
Machine is 2 △/delta connection (corresponding low-voltage/high voltage).
For purposes of illustration only, for a specific example: 6 pole times voltage of rated power 280KW, 220/440V/60Hz, 72 slot
Threephase asynchronous, every slot conductor number be 2.5 (by design calculate, electric machine combination property index preferably when the every slot of stator
Conductor number be 2.5), as different number of stator slots, different numbers of poles, different every slot conductor numbers, after the same method and
Thinking can be obtained with reasoning.
The double-layer overlapped of 72 slot, 6 pole span 10 as shown in Figure 1 around winding be equal pitch, etc. the number of turns lap wound form, coiling
And boarding line is simple, symmetrical, single.
72 slot, 6 pole Concentrical winding as shown in Figure 2 is the Concentrical winding form of irregular pitch, the span in this example
It is 11/9/7, number in parallel is 1, is used when corresponding to high voltage (such as 440V).
72 slot, 6 pole Concentrical winding as shown in Figure 3 is the Concentrical winding form of irregular pitch, the span in this example
It is 11/9/7, number in parallel is 2, is used when corresponding to low-voltage (such as 220V).
As shown in figure 4, being the every slot conductor number signal of 72 slot, 6 pole embodiment concentric type unequal-turn winding of the utility model
Figure, the umber of turn of span 11 are 2, and the umber of turn of span 9 is 2, and the umber of turn of span 7 is 1.Corresponding groove number 1,2,3,4
Upper layer side conductor number be respectively 2,2,1,0, lower layer's side conductor number of corresponding groove number 1,2,3,4 is respectively 0,1,2,2, right in this way
The conductor number for answering slot number 1,2,3,4 is respectively 2+0=2,2+1=3,1+2=3,0+2=2.Similarly, corresponding groove number 5,6,7,8,
9,10,11,12 ... conductor number is sequentially 2,3,3,2,2,3,3,2 ...
It is well known that MgO-ZrO_2 brick (i.e. pole phase group)=72/6/3=4 of 72 slot, 6 pole three phase asynchronous motor, it can
See, embodiment is 2,3,3,2 in the conductor number of each pole Xiang Zuzhong, then equivalent every slot conductor number is (2+3+3+2)/4=
2.5。
In this example, electric machine combination property index preferably when the every slot conductor number of stator be 2.5, theoretical calculation is feasible, and
The technique of the prior art is practical to be cannot achieve, and the usual every slot conductor number of tradeoff design is 2 or 3.
It is respectively 2,2.5,3 to protect that table 1, which is the utility model concentric type unequal-turn winding and double-layer overlapped around every slot conductor number,
Hold stator winding enamel covered wire dosage it is essentially identical in the case where efficiency, power factor, starting current, starting torque, maximum
The comparison of design of the performance indicators such as torque:
Table 1
According to the technical requirements of YE2 series of high efficiency threephase asynchronous, 280kW-6P motor should meet: efficiency >=95%
(minimum 94.5%), power factor >=0.88 (minimum 0.86), starting current≤6.7 (maximum 8.04), starting torque >=2.0
(minimum 1.7), torque capacity >=2.0 (minimum 1.8).The table of comparisons 1 is as it can be seen that the double-layer overlapped that every slot conductor number is 2 is wound on efficiency, function
Unqualified in terms of the performance indicators such as rate factor, starting current, the double-layer overlapped that every slot conductor number is 3 is wound on efficiency, starting torque, most
It is unqualified in terms of the performance indicators such as big torque, and the double-layer overlapped that the utility model and every slot conductor number are 2.5 is around can satisfy skill
Art requirement, but every slot conductor number be 2.5 double-layer overlapped around may only theoretical calculation and can not practical operation.The utility model
Make equivalent every slot in the case where every slot conductor number is integer (can be with practical operation) by concentric type unequal-turn Winding Design
Conductor number be 2.5, by equivalent span in this present embodiment be 9.4, less than double-layer overlapped around span 10, meeting or exceeding
Every slot conductor number be 2.5 double-layer overlapped around design performance while, stator winding enamel covered wire dosage also reduces 2.01kg, drop
Low cost, improves the competitiveness of product in market.
The above-mentioned description to embodiment is for that can understand and apply this practical convenient for those skilled in the art
It is novel.Person skilled in the art obviously easily can make various modifications to above-described embodiment, and illustrating herein
General Principle be applied in other embodiments without having to go through creative labor.Therefore, the utility model is not limited to above-mentioned
Embodiment, those skilled in the art's announcement according to the present utility model, the improvement made for the utility model and modification are all answered
This is within the protection scope of the utility model.
Claims (5)
1. a kind of multiplication of voltage threephase asynchronous, including stator and rotor, stator includes base and is fixed on inboard wall of base
There is a wound stator iron core, described to have wound stator iron core include stator core and the coil windings in its stator slot, is turned
The cast-aluminum rotor that attached bag includes shaft and is mounted in shaft；It is characterized by: the coil windings use concentric type unequal-turn
Distributed Winding.
2. multiplication of voltage threephase asynchronous according to claim 1, it is characterised in that: the stator core is by thickness
The high-quality cold rolling electrical steel sheet of 0.5mm is overrided to form.
3. multiplication of voltage threephase asynchronous according to claim 1, it is characterised in that: the cast-aluminum rotor is by thickness
The high-quality cold rolling electrical steel sheet of 0.5mm and the molten aluminum die casting of high temperature melting are integral.
4. multiplication of voltage threephase asynchronous according to claim 1, it is characterised in that: the mode of connection of the coil windings
For 2 △/△ or 2Y/Y, i.e., when motor is low pressure operation, the number in parallel of coil windings is 2；When motor is high pressure fortune
When row, the number in parallel of coil windings is 1.
5. multiplication of voltage threephase asynchronous according to claim 4, it is characterised in that: for the electricity of rated power < 4kW
Motivation, coil windings use the 2Y/Y mode of connection；For rated power >=4kW motor, coil windings using 2 △/
Delta connection mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920247562.4U CN209571932U (en) | 2019-02-26 | 2019-02-26 | A kind of multiplication of voltage threephase asynchronous |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920247562.4U CN209571932U (en) | 2019-02-26 | 2019-02-26 | A kind of multiplication of voltage threephase asynchronous |
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| CN209571932U true CN209571932U (en) | 2019-11-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111786488A (en) * | 2020-06-04 | 2020-10-16 | 苏州汇川技术有限公司 | Motor stator and motor |
-
2019
- 2019-02-26 CN CN201920247562.4U patent/CN209571932U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111786488A (en) * | 2020-06-04 | 2020-10-16 | 苏州汇川技术有限公司 | Motor stator and motor |
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