CN105099110A - Enhanced squirrel-cage pole changing motor and two speed hoist comprising the same - Google Patents
Enhanced squirrel-cage pole changing motor and two speed hoist comprising the same Download PDFInfo
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- CN105099110A CN105099110A CN201510232627.4A CN201510232627A CN105099110A CN 105099110 A CN105099110 A CN 105099110A CN 201510232627 A CN201510232627 A CN 201510232627A CN 105099110 A CN105099110 A CN 105099110A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/12—Asynchronous induction motors for multi-phase current
- H02K17/14—Asynchronous induction motors for multi-phase current having windings arranged for permitting pole-changing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/18—Power-operated hoists
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Windings For Motors And Generators (AREA)
Abstract
The present invention relates to a three-phase squirrel-cage pole changing motor and a hoist including the same. The three-phase squirrel-cage pole changing motor according to the present invention includes a stator which includes coils wound around a plurality of slots formed on the inner circumference thereof and a cylindrical rotor which is formed to face the inner circumference of the stator and rotates by a magnetic force generated when a current flows in the coil. The stator includes the coils which are divided into two groups and are wound to make the rotor rotate with two kinds of speeds. A first group is wound to form six poles. A second group is wound to form 24 poles.
Description
Technical field
The present invention relates to the special squirrel-cage pole-changing motor of three-phase and comprise the double speed crane of this motor, particularly can realize at a high speed without the need to additional element and the special squirrel-cage pole-changing motor of three-phase of low speed two kinds of rotary speeies and comprise the double speed crane of this motor.
Background technology
Today, along with industrial expansion, not only complicated mechanical device be produced on increase, and be transported to by the article that above-mentioned mechanical device is made into and use all over the world.
In the making mechanical device of above-mentioned complexity or the process of conveying articles, need upwards to promote or fall object correlation (parts, article etc.) downwards time many, now the main representational equipment used is crane (hoist).
At this, crane is the equipment that the wire be connected with object by winding or unwinding makes object move up and down, and is roughly divided into electric travelling crane and hydraulic hoisting crane.
Wherein, electric travelling crane as shown in Figure 1, makes wire reel by by rotating or the reel 10 of unwinding, power-producing motor 20, the transmission of power be supplied to be formed to the gear box 30 of reel 10, the brake 40 that is used for making the rotation of reel 10 stop.
Now, the kind of the object moved up and down as required, motor 20 can use various motor, but generally speaking, the power supply major part using the place of crane is AC power, therefore mainly uses three phase squirrel cage induction machine.
Induction machine is the drive unit being produced revolving force by the induction effect of coil, can change speed by frequency conversion or pole-changing.Two main coils carry out pole-changing by outside relay.
But, when using above-mentioned three phase squirrel cage induction machine 20, realize at a high speed and low speed two kinds of rotary speeies not a duck soup comparatively speaking.And, meet that crane motor (motor) characteristic, motor volume are little and to realize two kinds of rotary speeies then more difficult.
In the prior art, for optionally realizing the speed of object movement, as shown in Figure 1, stand-by motor 22 is comprised at crane.That is, by the rotary speed that three phase squirrel cage induction machine 20 realizes at a high speed, thus rapid moving object, the rotary speed of low speed is realized by stand-by motor 22, thus mobile object at a slow speed.
But, when comprising stand-by motor 22, not only for passing through the complex structure of the gear box 30 of the power that stand-by motor 22 is supplied, but also need to comprise the auxiliary brake 42 for making the reel 10 rotated by stand-by motor 22 stop.
Structure except gear box 30 becomes complicated and needs to increase except auxiliary gearbox 50 and auxiliary brake 42, other inscapes (such as, bearing, shell etc.) of crane also may be made to become complicated or also need to comprise other inscapes.
As mentioned above, inscape becomes complicated or increases inscape and means and need additional element, this not only increases the manufacture unit price of crane, but also can cause and be difficult to controlling between element and causing shortening the various problems such as life-span because of wearing and tearing.
Summary of the invention
In view of the above problems, the object of the present invention is to provide a kind of can realize at a high speed without the need to additional element and low speed two kinds of rotary speeies the special squirrel-cage pole-changing motor of three-phase and comprise the double speed crane of this motor.
Technical problem to be solved by this invention is not limited to above-mentioned technical task, and to those skilled in the art, NM other technologies problem will become clear by content below.
The special squirrel-cage pole-changing motor of three-phase of the present invention comprises: stator, and the first coil forming 6 poles and the second coil forming 24 poles are wound in a groove respectively, to make the ratio of low speed and high speed for 1:4; And rotor, cylindrical, be oppositely arranged with the inner peripheral surface of described stator, and by there being the magnetic force produced during current flowing to rotate in described coil, the pitch of described first coil is 13 pitches, described pitch is the coil-span of the groove of described stator, and described three-phase special squirrel-cage pole-changing motor independently controls the electric current flowing into described first coil and described second coil.
At this, the pitch of the second coil is 4 pitches.
In addition, the electric current flowing into the first coil or the second coil is automatically blocked after the time exceeding user's defined.
In addition, while the electric current flowing into the first coil is blocked after the time exceeding user's defined, electric current only flows into the second coil, or flows into while the electric current of the second coil is blocked after the time exceeding user's defined, and electric current only flows into the first coil.
In addition, the external diameter of described stator is 270 ㎜, and internal diameter is 195 ㎜.
In addition, when the special squirrel-cage pole-changing motor of motor formation 3.7KW level three-phase of the present invention, described first coil encloses with the dual winding 13 of the thickness of 1.00mm, and described second coil encloses with the dual winding 38 of the thickness of 0.85 ㎜.
In addition, when the special squirrel-cage pole-changing motor of motor formation 5.5KW level three-phase of the present invention, the described coil of described first group by the coil of 1.00 ㎜ thicknesses, the coil of 0.90 ㎜ thickness and 0.85 ㎜ thickness coil respectively single winding 9 enclose, the described coil of described second group is enclosed by the single winding 32 of the coil of 0.80 ㎜ thickness, and the dual winding 32 of coil of 0.75 ㎜ thickness encloses.
Double speed crane of the present invention comprising described three-phase special squirrel-cage pole-changing motor, wire being reeled or the spool of wire of unwinding, the transmission of power of being supplied by described motor is to the gear box of reel and the brake that is used for making the rotation of reel to stop by rotating.
Now, described brake independently controls First Speed and the second speed of described motor.
In addition, described spool of wire possess groove with prevent wire reel or unwinding time push to the left and right.
In addition, described spool of wire circumferentially the length direction in face possess anti-detachment framework and depart to prevent wire.
In addition, described spool of wire comprises for carrying out with described motor the reel disc-shaped flange that is connected.
According to the special squirrel-cage pole-changing motor of three-phase of the present invention, can realize at a high speed and low speed two kinds of rotary speeies without the need to additional element, thus the crane that can make to comprise above-mentioned motor is with at a high speed or tick-over, make object move up and down with high speed or low speed.
Effect of the present invention is not limited to above-mentioned effect, and to those skilled in the art, other effects NM will become more clear by the record of claim.
Accompanying drawing explanation
Fig. 1 is the sectional view of existing crane.
Fig. 2 is the sectional view of an embodiment of the crane comprising the special squirrel-cage pole-changing motor of three-phase of the present invention.
Fig. 3 is the partial cut stereogram of an embodiment of the crane shown in Fig. 2.
Fig. 4 is separately only by the stereogram of a part for special for three-phase squirrel-cage pole-changing motor incision in an embodiment of the crane shown in Fig. 3.
Fig. 5 is the stereogram decomposed according to inscape by special for the three-phase shown in Fig. 4 squirrel-cage pole-changing motor.
Fig. 6 is the stereogram only representing separately the stator in the structure of the special squirrel-cage pole-changing motor of three-phase shown in Fig. 5.
Fig. 7 is the front sectional drawing of the stator shown in Fig. 6, is the wound condition comprised for coil is described and the ideograph of content represented arbitrarily.
Fig. 8 and Fig. 9 is wound condition in order to be described in more detail the coil comprised in the figure 7 and the part A of enlarged drawing 7 and the ideograph of part B respectively.
Reference numeral
10: reel
20: three phase squirrel cage induction machine
22: stand-by motor
30: gear box
40: brake
42: auxiliary brake
50: auxiliary gearbox
100: spool of wire
150: reel disc-shaped flange
200: the special squirrel-cage pole-changing motor of three-phase
210: stator
212: groove
220: rotor
230: coil
The coil of 232: the first groups
The coil of 234: the second groups
240: electric machine rotational axis
250: framework
260: electric machine flange
270: motor cover
300: deceleration unit
400: brake unit
Embodiment
Below, by reference to the accompanying drawings embodiments of the invention are described in detail.But, in explanation process of the present invention, for making main points of the present invention become more clear, omit the explanation to published function or structure.
Meanwhile, in explanation process of the present invention, the term of front, rear or the direction indication such as upside, downside is recorded for helping those skilled in the art to understand the present invention better, refers to relative direction, and does not limit interest field of the present invention.
Generally speaking, pole-changing motor has the motor of 2/4,2/12,4/6,4/8,6/8,6/12 pole.Although there are more pole-changing motors, general pole-changing motor is used for the difference that the crane hoisting used time exists framework and speed, therefore needs the crane hoisting three phase squirrel cage pole-changing motor spiral mode and the application technology that are applicable to crane.
Crane has single speed crane, double speed crane.Single speed crane drives a motor to run with single speed.Double speed crane drives two motors respectively, and needs mechanical variable speed device.
Double speed crane is when use two motors, and there are the following problems: because the frequent operation of required mechanical variable speed device causes product impaired, thus shortens life of product.Therefore, for solving the problem and proposing the present invention, object is to provide a kind of crane hoisting three phase squirrel cage pole-changing motor that can be used for not using the double speed crane of mechanical variable speed device.
For the high speed and the low speed that are suitable for crane, when user generally believes high speed, when about 5m per minute, low speed, about 1m per minute is advisable.
In the present invention, considering convenience and the control efficiency aspect of user, for making low speed and speed ratio at a high speed become 1:4, low speed pole and high speed pole being configured to 24 poles, pole/6.Certainly, can with number of poles ratios different with it as number of poles ratios such as 2 poles, pole/8,4 poles, pole/16,8 poles, pole/32, numerically realize the speed ratio of 1:4, but be not suitable for as crane motor, and be described in content below about the content of this respect.
Crane motor in the past or general pole-changing motor, such as, in the pole-changing motors (pole-changing motor) such as 2 poles, pole/8,2 poles realize 3600rpm/m and at a high speed, and 8 poles realize 900rpm/m and for low speed.But because the rpm of 2 poles is high, bring burden to the axle of motor, increase fracture possibility, for making up this point, expensive material and larger sized motor shaft need be manufactured, thus be not suitable for crane motor, being disclosed about this point.4 pole, pole/16 are run with the fast speed being suitable for crane than above-mentioned explanation, therefore in order to use in crane, and when using in the decelerator of prior art, in order to make velocity variations, need the structure changing decelerator, but the structure changing decelerator can cause the problems such as other gear making, and when 8 pole, pole/32, because motor size becomes large, thus can not be used in the crane of prior art.The motor of above-mentioned 2 poles, pole/8,4 poles, pole/16,8 poles, pole/32 reduces the efficiency of motor, especially in the crane reducer structure of prior art, there is the problems such as its size is not suitable for.Consider the problems referred to above, the present inventor finds, in order to reduce the problems referred to above to greatest extent and optimize crane functions, 6 pole, pole/24 motors is used as crane with being advisable.
Namely, when adopting the decelerator of prior art, cannot realize with general pole-changing motors such as 2P/8P pole-changing motors the high speed and the low speed lifting-speed that are applicable to crane, two motors therefore can only be adopted artificially to realize high speed/low speed (the dual motor of so-called mechanical type).But a crane tool for two motors, then as described in the background art, can cause following problem: increase crane cost of manufacture, the structure of crane is made to become complicated.
The present inventor finds, in order to make without the need to two kinds of different motors and mechanical device and realize being applicable to the high speed of crane and the motor of low speed with reasonable prices required on the market, as described herein, need adopt 6 pole, pole/24 pole-changing motors.
In addition, when crane motor, although speed itself is also very important, but moment mechanomotive force (power of transient rise weight) is very important, therefore motor size (increase number of poles) is in general preferably increased, but because crane is the device being mainly used in promoting object, although the weight and volume therefore increasing crane main body self can improve mechanomotive force, also can with the problem reducing crane own efficiency.Therefore, unrestrictedly number of poles can not be increased.
For these reasons, the present inventor finds that 6P/24P pole-changing motor is not only best suited for crane, and best speed and motor-driven power can be played (if increase number of poles further relative to motor size, then the size of motor is increased to and is not suitable for being used in crane, if and reduce number of poles, then speed and motor-driven power is reduced to below required value).
Exploitation 6/24P crane pole-changing motor was also once attempted by existing a small amount of motor manufacturing company, but all ended in failure, and that can develop crane 6/24P motor at present only has the application company.
Other companies, in the reason of exploitation as failure in 6/24P crane pole-changing motor of the present invention, can be summarized as follows:
The first, for realizing 24P motor, groove quantity 72 is advisable, but considers from the characteristic of crane, and for realizing the miniaturization of motor, the making of the stator of 72 grooves is very difficult (can be for reference, the groove of 2/8P motor stator is 48).This is because motor is small-sized, but groove reaches 72, so task difficulty is high, especially the groove of internal rotor also reaches 72, and therefore as mini-plant, operating efficiency is too low.
The second, for solving the difficulty in above-mentioned operation, stator size need be strengthened, but now need the size of oversized slots simultaneously, although can operating efficiency be improved like this, and become large because of overall size, 24P dynamic torque on opportunity and efficiency good, but when 6P, along with the raising of motor-driven electric current, problems of excessive heat occurs, and (on chart, motor-driven moment of torsion is elongated be the л of non-Λ, therefore needs to starting for a long time, thus heating is too much, cannot commercialization).And, along with the increase of size, there is unbalanced problem on the whole.Such imbalance not only affects outward appearance, and makes center of gravity to motor lopsidedness, thus causes the instability in overall structure.
3rd, for superheating phenomenon when eliminating 6P and reduce size time, although can eliminate produced problem when increasing size to a certain extent, the electric current now during 24P uprises and produces superheating phenomenon, and electromagnetic sound is large, cannot obtain desired efficiency.
Therefore, the coil thickness finding the external diameter of stator, internal diameter, pitch equal-specification and the size to stator to have an impact in 6/24 pole motor and the optimum value of wire circle are vital things concerning crane motor.Namely, for obtaining the number of turns that desired magnetic force can be many by thin coil winding, or by the number of turns few for thick coil winding, and this all has an impact to stator size, and affect the specification of the rotor affected by diameter of stator bore further, thus the final specification determining motor.
First, composition graphs 2 and the embodiment of Fig. 3 to crane of the present invention are described.
At this, Fig. 2 is the sectional view of an embodiment of the crane comprising the special squirrel-cage pole-changing motor of three-phase of the present invention, and Fig. 3 is the partial cut stereogram of an embodiment of the crane shown in Fig. 2.
As shown in Figures 2 and 3, an embodiment of crane of the present invention can comprise spool of wire 100, the special squirrel-cage pole-changing motor 200 of three-phase.
At this, spool of wire 100 is wound with the wiry columnar inscape be connected with object, the place used according to an embodiment of crane of the present invention and the capacity etc. of the special squirrel-cage pole-changing motor 200 of three-phase described later, adopt various length and thickness.
Above-mentioned spool of wire 100 possesses groove, to prevent from being pushed by left and right when wire winding or unwinding, and circumferentially the length direction in face possesses anti-detachment framework, depart to prevent wire, possesses reel disc-shaped flange 150 in addition, for being connected with the special squirrel-cage pole-changing motor 200 of three-phase described later.
In addition, three-phase special squirrel-cage pole-changing motor 200 provides power to make it rotate to reel or unwinding inscape wiry to spool of wire 100, and be included in an embodiment of crane of the present invention, but because also belonging to the present invention, therefore, except Fig. 2 and Fig. 3, go back composition graphs 4 to Fig. 9 and be described in detail.
In addition, except spool of wire 100 and the special squirrel-cage pole-changing motor 200 of three-phase, an embodiment of crane of the present invention can also comprise deceleration unit 300, brake unit 400 etc.
At this, deceleration unit 300 be transmission of power that special for three-phase squirrel-cage pole-changing motor 200 is provided to the inscape of spool of wire 100, can be made up of the form of the interconnective gear box of multiple gear, but be not limited to this.
As described in the background art, do not comprise two motors in one embodiment of crane of the present invention and only include a motor (the special squirrel-cage pole-changing motor 200 of three-phase), therefore above-mentioned deceleration unit 300 can be made up of the unit corresponding to a motor, realize problem to be solved by this invention thus, namely get rid of and add element.But the feature of deceleration unit 300 of the present invention is in low-speed mode and fast mode can control rate, and brake unit is also the same in low-speed mode with fast mode.But the more important thing is, according to the amount flowing into the electric current of each coil when low-speed mode and fast mode, produce different speed, therefore the feature of deceleration unit of the present invention and brake unit is that each electric current to flowing into controls.Therefore, the electric current of low speed coil and high speed coil is independently controlled, thus more easily regulates the speed of crane, especially slow-action.
When crane, need to continue to rerun-stop-reruning, and when reruning after running, stopping, needing to play can the required motor-driven moment of torsion of lifting heavy, and again out of service immediately, the slow-action therefore cutting off circuital current is very important.
In addition, brake unit 400 is inscapes of necessity when the spool of wire 100 of rotation is stopped, as long as spool of wire 100 can be made to stop, any-mode can be adopted to realize.
That is, as shown in Figures 2 and 3, brake unit 400 can be arranged at the opposite side of the spool of wire 100 arranging the special squirrel-cage pole-changing motor 200 of three-phase, although or not shown, also can be connected with the special squirrel-cage pole-changing motor 200 of three-phase and arrange.
One embodiment of the crane of the present invention formed in the above described manner, according to the condition moving up and down object, changes the operational mode of three-phase special squirrel-cage pole-changing motor 200, fast or at a slow speed mobile object.
That is, the special squirrel-cage pole-changing motor 200 of three-phase is according to the condition moving up and down object, to be divided into two kinds of mode operations of fast mode or low-speed mode.
Composition graphs 4 to Fig. 9 is described in detail by this, if but to fast mode and low-speed mode first brief description, then fast mode refers to when there being current flowing in the coil 232 of first group being wound in stator 210 with 13 pitches, form 6 poles and make rotor 220 to rotate relative to First Speed at a high speed, thus with the pattern of relative rapid moving object, and low-speed mode refers to when there being current flowing in the coil 234 of second group being wound in stator 210 with 4 pitches, form 24 poles and rotor 220 is rotated with the second speed of relative low speeds, thus with the pattern of relative low speeds mobile object.
In an embodiment of the crane of the invention described above, the embodiment 200 (when to an embodiment of of the present invention crane be described, with one of inscape example record Reference numeral) of of the present invention three-phase special squirrel-cage pole-changing motor of composition graphs 4 to Fig. 9 to the embodiment being contained in crane of the present invention is described in detail.
At this, Fig. 4 is separately only by the stereogram of a part for special for three-phase squirrel-cage pole-changing motor incision in an embodiment of the crane shown in Fig. 3, Fig. 5 is the stereogram decomposed according to inscape by special for the three-phase shown in Fig. 4 squirrel-cage pole-changing motor, and Fig. 6 is the stereogram only representing separately the stator in the structure of the special squirrel-cage pole-changing motor of three-phase shown in Fig. 5.In addition, Fig. 7 is the front sectional drawing of the stator shown in Fig. 6, be the wound condition comprised for coil is described and the ideograph of content represented arbitrarily, Fig. 8 and Fig. 9 is wound condition in order to be described in more detail the coil comprised in the figure 7 and the part A of enlarged drawing 7 and the ideograph of part B respectively.
As shown in Fig. 4 to Fig. 9, the special squirrel-cage pole-changing motor 200 of three-phase of the present invention can comprise stator 210, rotor 220.
At this, stator (stator) 210, as the inscape of the stator that is otherwise known as, is wound with coil 230 possessing in multiple grooves 212 of inner peripheral surface.
Now, how the rotary speed of rotor 220 described later is wound in the groove 212 of stator 210 according to coil 230 and different, after being described rotor 220, will be described in detail by various experimental example to this.
In addition, rotor (rotor) 220 is as the inscape of the rotary body that is otherwise known as, cylindrical, and the inner peripheral surface of relative stator 210 is arranged, and rotor 220 by there being the magnetic force produced during current flowing to rotate in coil 230.
The rotary speed of above-mentioned rotor 220 is according to how arranging described rotor 220 and permanent magnet and different, but technical characteristic of the present invention is the groove 212 how coil 230 is wound in stator 210, therefore omits and is described.But although eliminate explanation, not talkative to implement the present invention to those skilled in the art be non-obvious, and can not have an impact to interest field of the present invention.
Then, as mentioned above, by illustrate and how coil 230 is wound in the relevant various experimental examples of the groove 212 of stator 210, technical characteristic of the present invention is understood.
First, before each experimental example is described, the basic premise of an embodiment 200 of the special squirrel-cage pole-changing motor of three-phase and term definition are described.
One embodiment 200 of the special squirrel-cage pole-changing motor of three-phase of the present invention can carry out rotating to be prerequisite with two kinds of rotary speeies with rotor 220, and therefore coil 230 is divided into two groups of windings.
Now, the coil 232 of first group reels in the mode forming 6 poles (pole), and when having current flowing in the coil 232 of above-mentioned first group, rotor 220 is to rotate relative to high speed.In addition, the coil 234 of second group reels in the mode forming 24 poles, and when having current flowing in the coil 234 of above-mentioned second group, rotor 220 rotates with relative low speeds.
In addition, coil 230 is double by what reel with a bundle form
mode reels, and now the spacing of the groove 212 of a bundle coil 230 winding is called pitch (pitch).
In addition, when coil reels in double mode, when a bundle is benchmark with 2, mean by dual winding.Namely, different from the situation that the coil 230 that Fig. 8 represents reels with many bundles form, Fig. 9 represents, when a bundle is formed for benchmark with 2, when 1 coil winding 13 encloses, mean and cross section is wound with 26 coils 230 (coil 232 for first group) altogether, when 2 coil windings 38 enclose, mean and cross section is wound with 76 coils 230 (coil 234 for second group) altogether.
In other words, single winding refers to a bundle with 1 for benchmark, and dual winding refers to a bundle with 2 for benchmark.Certainly, the process of dual winding can be combined two of 1 coil that reeled to put into groove 212, can also be put into groove 212 by one of 2 coils that reeled simultaneously.
Therefore, need to distinguish a bundle and 1, a bundle needs by insulating paper separately also independent, but 1 is contained in a bundle, therefore without the need to separately also independent by insulating paper.That is, in fig. 8, traverse insulating paper in groove for benchmark distinguish with shown, except for the formation of except one group of pole, for be a bundle, instead of 1.
Can be for reference, distinguish a bundle and formed one group of pole be not insulating paper, but pitch number.That is, not only each bundle is distinguished by insulating paper, and the coil 232 of first group and the coil 234 of second group are also distinguished by insulating paper.
In addition, insulating paper is the component preventing between coil 230 energising, as long as energising can be prevented, its shape and structure so material all unrestricted.
In addition, the term relevant to winding method, bus connection method, copper cash etc. mentioned when being described each experimental example is those skilled in the art's easy understand, does not therefore repeat them here.
Crane motor of the present invention, comprise: 1) stator, possessing in 72 grooves of stator inner peripheral surface, coil is divided into two groups to reel in double mode, and the spacing of the above-mentioned groove of a bundle coil winding is when being pitch, first group of above-mentioned coil reels with 13 pitches to form 6 poles, and second of above-mentioned coil group reels with 4 pitches to form 24 poles; 2) rotor, cylindrical, being oppositely arranged with the inner peripheral surface of said stator, rotating by there being the magnetic force produced during current flowing in above-mentioned coil, when forming 6 pole in said stator, rotate with First Speed, and when forming 24 pole in said stator, rotate with second speed, wherein in high speed mode, 6 poles rotate with First Speed, and in the low-speed mode, 24 poles rotate with second speed.
Especially, the special squirrel-cage pole-changing motor of three-phase of the present invention is when the stator of use 72 groove, and be not suitable for the motor that existing Large Copacity exports, the output that can specify to be suitable only for crane is the situation of 3.7KW or 5.5KW.
In addition, for being suitable for 3.7KW or the 5.5KW motor stator of double speed crane, stator outer diameter 270mm can be specified, internal diameter 195mm.If use the motor of above-mentioned specification of the present invention, when the external diameter of stator and internal diameter are above-mentioned numerical value, can micro-machine be realized and obtain required effect.
Consider from this point, compared with general motor, crane motor of the present invention in a groove respectively winding rotor can be made with at a high speed different with low speed two of carrying out rotating coils, without the need to other mechanical variable speed devices, rotor can be made to rotate with two kinds of rotary speeies by an electric device, thus realize low speed and high-speed cruising in a crane.
In addition, crane motor of the present invention is carried out speed adjustment by specifically for for lifting heavy, easily and easily carries out the crane motor of slow-action (inching refers to that motor cuts off circuit before reaching normal speed) operation.
In addition, the feature of crane motor of the present invention is, is not by a kind of coil but is wound in a groove by the grouping of two kinds of coils, therefore from a kind of coil of winding and to change the mode of carrying out pole-changing by the phase place of the alternating current being supplied to coil different.
In addition, the invention is characterized in, the independent control two groups i.e. electric current of high-speed set and low speed group, the i.e. independent speed controlling each group, therefore carry out compared with the motor of the prior art of speed adjustment, being improved for induced current with reel in a groove coil of two kinds or more the part to coil.
That is, in the present invention, be formed in two coil groups in a groove and be responsible for high-speed region and low-speed region (that is, second group that runs when effect is divided into first group of running when to press high speed button in crane and presses low speed button) respectively.Because in described mode, according to low speed and at a high speed to two groups all supply induced current or to some group for induced current time, single spiral mode will be adopted, and now according to spiral characteristic, low speed will be restricted to 1:2 with the ratio of high speed.But, according to the present invention, various speed ratio can be realized according to number of poles ratio (6:24, i.e. 1:4), therefore, it is possible to obtain the effect being applicable to crane.
But, in the present invention, the coil of each group is independently responsible for low-speed region and high-speed region, need to specify the number of poles of each coil and the pitch number for realizing the output being applicable to above-mentioned situation for this reason, and need groove number and the diameter of correspondingly regulation stator, and in the present invention, experimentally data provide the optimal values of the groove of stator, the group number/number of poles/thickness/radical/number of turns, the pitch number etc. of coil.
Speed ratio is defined as 1:4 by crane motor of the present invention, and high speed limit is decided to be 6 poles.Therefore, low speed pole should be 24 poles.For realizing 24 poles, adopting the stator of minimum 72 grooves to be advisable, therefore in the present invention, the quantity of groove being defined as 72.For realizing 72 grooves, for obtaining the motor-driven moment of torsion be used for needed for moment lifting heavy in crane, need with 11 pitches or 13 pitch spirals (if pitch number be less than 11 or 13 pitches, although required motor-driven moment of torsion can be realized, but the heating of motor is serious, efficiency reduces, if pitch number is greater than 11 or 13 pitches, although efficiency improves, but required motor-driven moment of torsion cannot be realized), wherein easier with 13 pitch spirals, therefore be relatively applicable to (namely, do not select 11 pitches and select the reason of 13 pitches to be, when carrying out spiral operation, than 11 pitches, operation during 13 pitch is easy).
All experiments are optimized according to industrial safety management work group regulation.
Below, each experimental example is described, wherein experimental example 1 to experimental example 6 to be the quantity of the groove 212 possessed for stator 210 be experimental example that the situation of 54 carries out, and the experimental example that the situation that the quantity that experimental example 7 to experimental example 11 is the grooves 212 possessed for stator 210 is 72 is carried out.
Now, for making the quantity of groove 212 reach 72, the size of stator 210 and groove 212 also needs adjustment, and this will illustrate in the lump when being described experimental example 7.
Experimental example 1
Experimental example 1 is in 54 grooves, the spacing of the coil of first group of formation 6 pole is set to 8 pitches, the spacing of the coil of second group of formation 24 pole is set to the situation of 4 pitches, in the coil of first group of formation 6 pole, normal magnetic force can be produced and rotor high-speed is rotated, but in the coil of second group of formation 24 pole, do not produce magnetic force and rotor cannot be made to rotate.
Experimental example 2
Experimental example 2 is in 54 grooves, and the spacing of the coil of first group of formation 6 pole is set to 8 pitches, the spacing of the coil of second group of formation 24 pole is set to the situation of 3 pitches.
In above-mentioned experimental example 2, in the coil of first group of formation 6 pole, can produce normal magnetic force and make rotor high-speed rotate, but in the coil of second group of formation 24 pole, although produce magnetic force, but rotor cannot be made to rotate because its size is too weak.
Experimental example 3
Experimental example 3 is in 54 grooves, and the spacing of the coil of first group of formation 6 pole is set to 8 pitches, the spacing of the coil of second group of formation 24 pole is set to the situation of 5 pitches.
In above-mentioned experimental example 3, in the coil of first group of formation 6 pole, normal magnetic force can be produced and rotor high-speed is rotated, but in the coil of second group of formation 24 pole, although generation magnetic force, because its size is also weak and rotor cannot be made to rotate than experimental example 2.
Experimental example 4
Experimental example 4 is in 54 grooves, and the spacing of the coil of first group of formation 6 pole is set to 8 pitches, the spacing of the coil of second group of formation 24 pole is set to the situation of 6 pitches.
In above-mentioned experimental example 4, in the coil of first group of formation 6 pole, normal magnetic force can be produced and rotor high-speed is rotated, but in the coil of second group of formation 24 pole, although generation magnetic force, because of its size than experimental example 2 and experimental example 3 also weak and rotor cannot be made to rotate.
Experimental example 5
Experimental example 5 is in 54 grooves, and the spacing of the coil of first group of formation 6 pole is set to 8 pitches, the spacing of the coil of second group of formation 24 pole is set to the situation of 7 pitches.
In above-mentioned experimental example 5, in the coil of first group of formation 6 pole, normal magnetic force can be produced and rotor high-speed is rotated, but in the coil of second group of formation 24 pole, although generation magnetic force, because its size is also weak and rotor cannot be made to rotate than experimental example 2 to experimental example 4.
From above-mentioned experimental example 3 to experimental example 5, when the pitch spacings of the coil of second group of formation 24 pole increases, more magnetic force cannot be produced.
Experimental example 6
The same with above-mentioned experimental example, experimental example 6 is in 54 grooves, the spacing of the coil of first group of formation 6 pole is set to 8 pitches, the spacing of the coil of second group of formation 24 pole is set to 4 pitches, and winding method adopts the double mode of dual spiral (TwoWinding) mode.
In above-mentioned experimental example 6, the same with above-mentioned experimental example 1, in the coil of first group of formation 6 pole, normal magnetic force can be produced and rotor high-speed is rotated, but in the coil of second group of formation 24 pole, do not produce magnetic force and rotor cannot be made to rotate.
From above-mentioned experimental example 1 to experimental example 6, when groove being set to 54, be difficult to the low speed rotation realizing rotor.
Experimental example 7
Different from above-mentioned experimental example, experimental example 7 is in 72 grooves, the spacing of the coil of first group of formation 6 pole is set to 13 pitches, the spacing of the coil of second group of formation 24 pole is set to 4 pitches, and winding method adopts the double mode of dual spiral (TwoWinding) mode, the coil forming first group of 6 poles in addition adopts Y connection mode, and the coil forming second group of 24 poles adopts Δ connection mode, and the thickness of coil is also different.
Now, for making stator possess 72 grooves, the external diameter of stator and internal diameter are formed as the size larger than above-mentioned experimental example 1 to experimental example 6.
In above-mentioned experimental example 7, different from above-mentioned experimental example 1 to experimental example 6, although produce certain magnetic force, fail to obtain enough revolving forces, and because starting current raises, superheating phenomenon occurs when 6 pole.
Experimental example 8
Identical with above-mentioned experimental example 7, experimental example 8 is in 72 grooves, the spacing of the coil of first group of formation 6 pole is set to 13 pitches, the spacing of the coil of second group of formation 24 pole is set to 4 pitches, and winding method adopts the double mode of dual spiral (TwoWinding) mode, make that the coil of first group of formation 6 pole is identical with the connection mode of the coil of second group forming 24 poles all adopts Y connection mode in addition.
In addition, according to the external diameter of stator and the change of internal diameter, the thickness of the coil of each group, radical and the number of turns is correspondingly changed.
In above-mentioned experimental example 8, the same with experimental example 7, although produce certain magnetic force, fail to obtain enough revolving forces, but also create superheating phenomenon.
Experimental example 9
The same with above-mentioned experimental example 8, experimental example 9 is in 72 grooves, the spacing of the coil of first group of formation 6 pole is set to 13 pitches, the spacing of the coil of second group of formation 24 pole is set to 4 pitches, and winding method adopts the double mode of dual spiral (TwoWinding) mode, make that the coil of first group of formation 6 pole is identical with the connection mode of the coil of second group forming 24 poles all adopts Y connection mode in addition, and as mentioned above, change lamination, thickness, the number of turns etc. relative to experimental example 8.
In above-mentioned experimental example 9, the coil forming first group of 6 poles and the coil of second group forming 24 poles all produce normal magnetic force, and obtain enough revolving forces that can make rotor high-speed and low speed rotation respectively.It can thus be appreciated that, the numerical value of the size of the quantity of groove, stator, lamination, coil thickness, the number of turns are combined according to upper type, desired effect can be obtained.
But, if consider the load worked to this, experimental example 9 is conducive to the situation forming the special squirrel-cage pole-changing motor of 3.7kW level three-phase, form the special squirrel-cage pole-changing motor of 3.7kW level three-phase by an embodiment 200 of the such three-phase of the present invention special squirrel-cage pole-changing motor of experimental example 9, and again test with nominal load (3 tons) according to industrial safety management work group regulation.Result shows, current value, magnetic force, temperature, noise etc. are all in acceptability limit.
In addition, although form 3.7kW level three-phase special squirrel-cage pole-changing motor by an embodiment 200 of three-phase of the present invention special squirrel-cage pole-changing motor and find the situation favourable to nominal load 3 tons, but for find the situation favourable to nominal load 5 tons further, proceed the additional experiment as experimental example 10 and experimental example 11.
Below, Binding experiment example 10 and experimental example 11 are described the motor being suitable for nominal load 5 tons.
Experimental example 10
The same with above-mentioned experimental example 9, experimental example 10 is in 72 grooves, the spacing of the coil of first group of formation 6 pole is set to 13 pitches, the spacing of the coil of second group of formation 24 pole is set to 4 pitches, and winding method adopts the double mode of dual spiral (TwoWinding) mode, the coil forming first group of 6 poles is in addition identical with the connection mode of the coil of second group forming 24 poles all adopts Y connection mode, and changes lamination, thickness, the number of turns of coil relative to experimental example 9.
In above-mentioned experimental example 10, although produce certain magnetic force, fail to obtain the enough revolving forces relative to nominal load.
Experimental example 11
The same with above-mentioned experimental example 10, experimental example 11 is in 72 grooves, the spacing of the coil of first group of formation 6 pole is set to 13 pitches, the spacing of the coil of second group of formation 24 pole is set to 4 pitches, and winding method adopts the double mode of dual spiral (TwoWinding) mode, the coil forming first group of 6 poles is in addition identical with the connection mode of the coil of second group forming 24 poles all adopts Y connection mode, and changes lamination, thickness, the number of turns of coil relative to experimental example 10.
In above-mentioned experimental example 11, form the coil of first group of 6 poles and form the coil of second group of 24 poles and all create normal magnetic force, and obtaining enough revolving forces that rotor can be made relative to nominal load 5 tons of high speeds and low speed rotation respectively.
Namely, if consider load as above, experimental example 11 is conducive to the situation forming the special squirrel-cage pole-changing motor of 5.5kW level three-phase, form the special squirrel-cage pole-changing motor of 5.5kW level three-phase by an embodiment 200 of the such three-phase of the present invention special squirrel-cage pole-changing motor of experimental example 11, and again test with nominal load (5 tons) according to industrial safety management work group regulation.Result shows, current value, magnetic force, temperature, noise etc. are all in acceptability limit.
In sum, two groups are divided into reel that rotor 220 is rotated with high speed or low speed two kinds of rotary speeies at stator 210 coil 230, the coil 232 of first group reels in the mode forming 6 poles, the coil 234 of second group reels in the mode forming 24 poles, is specifically wound as suitable as follows.
Namely, if an embodiment 200 of special for three-phase of the present invention squirrel-cage pole-changing motor is configured to the special squirrel-cage pole-changing motor of 3.7kW level three-phase, then from above-mentioned experimental example 9, the coil 232 of first group encloses with the dual winding 13 of the thickness of 1.00mm, and the coil 234 of second group is advisable with dual winding 38 circle of the thickness of 0.85mm.
In addition, if an embodiment 200 of special for three-phase of the present invention squirrel-cage pole-changing motor is configured to the special squirrel-cage pole-changing motor of 5.5kW level three-phase, then first group coil 232 by the coil of the coil of 1.00 ㎜ thicknesses, 0.90 ㎜ thickness, 0.85 ㎜ thickness coil respectively single winding 9 enclose, the coil 234 of second group is enclosed by the single winding 32 of the coil of 0.80 ㎜ thickness, dual winding 32 circle of coil of 0.75 ㎜ thickness is advisable, and this is that those skilled in the art easily obtain from above-mentioned experimental example.
Now, referred to by dual winding 32 circle of the coil of 0.75 ㎜ thickness at the coil 234 of second group, as mentioned above, a bundle for benchmark with the coil 2 of 0.75mm thickness, therefore has 64 coils and is wound in cross section.
Certainly, in other situations except above-mentioned favourable situation, as long as the coil 232 of first group reels in the mode forming 6 poles, the coil 234 of second group reels in the mode forming 24 poles, rotor 220 is optionally rotated with high speed or low speed, then all should belong within interest field of the present invention.
In addition, except stator 210 and rotor 220, one embodiment 200 of the special squirrel-cage pole-changing motor of three-phase of the present invention also can comprise electric machine rotational axis 240, framework 250, electric machine flange 260, motor cover 270 etc., and above-mentioned inscape to be those skilled in the art can not limit the inscape freely changed within interest field of the present invention, therefore omit and be described.
The special squirrel-cage pole-changing motor of three-phase of the present invention according to the above description and comprise the crane of this motor, just can realize at a high speed and low speed two kinds of rotary speeies by means of only a special squirrel-cage pole-changing motor 200 of three-phase, therefore just object optionally can be made to move up and down fast or at a slow speed by crane without the need to additional element.
Below, the speeds control of crane motor of the present invention is described, namely realizes the process of slow-action performance.
In the startup, stopping control circuit of motor, when pressing start button, electric motor starting, even if removed from start button by hand afterwards, but electronic contactor is by magnetic holding circuit excitation, thus motor can be made to continue to rotate.In contrast, control as follows when slow-action runs: when pressing the button (or push-button switch, PBS), motor rotates, when being removed from slow-action button by hand, motor stops, and the motion of such motor is referred to as slow-action operation.Above-mentioned slow-action operates to and makes equipment carry out short time operation and need repeatedly to repeat the operation of trickle time, and the performance therefore for crane motor plays central role.
As mentioned above, in the present invention, the amount of the electric current flowing into First Line circle and the second coil is independently controlled.Therefore, at a high speed and the speed of low speed regulate be not subject to other coils affect independent operating.
In addition, three-phase of the present invention special squirrel-cage pole-changing motor continues to rerun-stop-reruning, previous-next-first-class operation, at a high speed and in the slow-action operation of low speed, suspending after the predetermined distance running set by user for making it, the amount of the electric current of coil can be entered by control flow check respectively.In addition, time out can be set by user, and for making it rerun after above-mentioned setting-up time, can enter the amount of the electric current of coil by control flow check respectively.
In addition, the speeds control of the special squirrel-cage pole-changing motor of three-phase of the present invention can carry out as follows: after running a period of time with low-speed mode, be automatically converted to fast mode.Such as, in ascending motion process, after running certain displacement with low-speed mode, be automatically converted to fast mode.In contrast, in descending motion process, after running certain displacement with fast mode, be automatically converted to low-speed mode.Distinctive control method is like this responsible at a high speed respectively because of the first coil and the second coil and low speed and be independently controlled and can realize.
Above-mentioned slow-action performance depends on the pitch of groove.Certainly, except pitch, the diameter of stator and the relation of number of poles also have an impact to slow-action performance, but this is compared with slow-action performance itself, and depend on that the heat generation characteristic of number of poles has darker relation.In other words, when being described for 6/24 pole motor of the present invention, the diameter of stator finally depends on 24 poles of more large number of poles, on relatively few number of poles, easily carry out heating according to heat radiation to control, but on relatively large number of poles, generate heat more because dispelling the heat bad.
Below, the make decision experimentation of pitch of 24 poles of the situation of 13 pitches when 6/24 pole of the present invention, 72 grooves, 6 pole is described.
Determine pitch experimental example 1
As implied above, as follows with the result that 3 pitches carry out testing:
1) electric current (during nominal load): 14.1amp during 6 pole
2) electric current (during nominal load): 19.5amp during 24 pole
3) electromagnetic sound is produced
4) temperature: more than 80 degree
5) nominal load test (load of 3 tons-can slow-action): can not slow-action result show can not slow-action.
Determine pitch experimental example 2
As implied above, as follows with the result that 3 pitches carry out testing:
1) electric current (during nominal load): 9.1amp during 6 pole
2) electric current (during nominal load): 20.5amp during 24 pole
3) electromagnetic sound is produced
4) temperature: more than 80 degree
5) nominal load test (load of 3 tons-can slow-action): can slow-action result show can slow-action.
Determine pitch experimental example 3
As implied above, as follows with the result that 5 pitches carry out testing:
1) electric current (during nominal load): 9.1amp during 6 pole
2) electric current (during nominal load): 17.9amp during 24 pole
3) electromagnetic sound is produced
4) temperature: more than 80 degree
5) nominal load test (load of 3 tons-can slow-action): can not slow-action result show can not slow-action.
Known by above-mentioned experiment, when 6/24 pole of the present invention, 72 grooves, 6 pole when 13 pitch, during 24 pole, 4 pitches are best.
Below, the additional experimental example in the development process of three-phase of the present invention special squirrel-cage pole-changing motor is described.
Add experimental example 1
< result >
Electric current (during nominal load): 9.2amp during 6 pole
Electric current (during nominal load): 16.9amp during 24 pole
Produce electromagnetic sound
Temperature: more than 80 degree
Nominal load test (load of 3 tons-can slow-action): slow-action can add experimental example 2
< result >
Electric current (during nominal load): 9.2amp during 6 pole
Electric current (during nominal load): 16.3amp during 24 pole
Produce electromagnetic sound
Temperature: more than 80 degree
Nominal load test (load of 3 tons-can slow-action): slow-action can add experimental example 3
< result >
Electric current (during nominal load): 8.8amp during 6 pole
Electric current (during nominal load): 15.6amp during 24 pole
Electromagnetic sound: produce electromagnetic sound
Temperature: more than 80 degree (also generating heat time non-loaded)
Nominal load test (load of 3 tons-can slow-action): slow-action can not add experimental example 4
< result >
Electric current (during nominal load): 9.0amp during 6 pole
Electric current (during nominal load): 16.4amp during 24 pole
Electromagnetic sound: produce electromagnetic sound
Temperature: more than 80 degree (also generating heat time non-loaded)
Nominal load test (load of 3 tons-can slow-action): slow-action can not add experimental example 5
< result >
Electric current (during nominal load): 9.2amp during 6 pole
Electric current (during nominal load): 16.1amp during 24 pole
Electromagnetic sound: produce electromagnetic sound
Temperature: more than 80 degree (also generating heat time non-loaded)
Nominal load test (load of 3 tons-can slow-action): slow-action can not add experimental example 6
< result >
Electric current (during nominal load): 8.8amp during 6 pole
Electric current (during nominal load): 12.4amp during 24 pole
Electromagnetic sound: produce electromagnetic sound
Temperature: 75 ~ 77 degree
Nominal load test (load of 3 tons-can slow-action): slow-action can not add experimental example 7
< result >
Electric current (during nominal load): 8.9amp during 6 pole
Electric current (during nominal load): 5.6amp during 24 pole
Electromagnetic sound: produce electromagnetic sound
Temperature: more than 80 degree
Nominal load test (load of 3 tons-can slow-action): slow-action can not add experimental example 8
< result >
Electric current (during nominal load): 8.9amp during 6 pole
Electric current (during nominal load): 5.9amp during 24 pole
Electromagnetic sound: produce electromagnetic sound and add experimental example 9
< result >
Electric current (during nominal load): 7.8amp during 6 pole
Electric current (during nominal load): 6.8amp during 24 pole
Electromagnetic sound: produce electromagnetic sound
Temperature: more than 80 degree
Nominal load test (load of 3 tons-can slow-action): slow-action can not add experimental example 10
< result >
Electric current (during nominal load): 8.8amp during 6 pole
Electric current (during nominal load): 8.9amp during 24 pole
Electromagnetic sound: produce electromagnetic sound
Temperature: 75 ~ 76 degree
Nominal load test (load of 3 tons-can slow-action): slow-action can add experimental example 11
< result >
Electric current (during nominal load): 8.8amp during 6 pole
Electric current (during nominal load): 9.5amp during 24 pole
Electromagnetic sound: produce slight electromagnetic sound
Temperature: 70 ~ 73 degree
Nominal load test (load of 3 tons-can slow-action): slow-action can add experimental example 12
< result >
Electric current (during nominal load): 9.3amp during 6 pole
Electric current (during nominal load): 10.0amp during 24 pole
Electromagnetic sound: without electromagnetic sound
As mentioned above, be illustrated specific embodiment of the present invention, but the present invention is not limited to above-described embodiment, those of ordinary skill in the art is to be understood that, do not departing within the spirit and scope of the present invention, can modify to the present invention, be out of shape or equivalent replacement.And not departing within the spirit and scope of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (12)
1. the special squirrel-cage pole-changing motor of three-phase, it comprises:
Stator, the first coil forming 6 poles and the second coil forming 24 poles are wound in a groove respectively, to make the ratio of low speed and high speed for 1:4; And
Rotor, cylindrical, be oppositely arranged with the inner peripheral surface of described stator, and by there being the magnetic force produced during current flowing to rotate in described coil,
The pitch of described first coil is 13 pitches, and described pitch is the coil-span of the groove of described stator,
The feature of the special squirrel-cage pole-changing motor of described three-phase is, the independent electric current controlling described first coil of inflow and described second coil.
2. the special squirrel-cage pole-changing motor of three-phase according to claim 1, is characterized in that, the pitch of the second coil is 4 pitches.
3. the special squirrel-cage pole-changing motor of three-phase according to claim 1, is characterized in that, the electric current flowing into the first coil or the second coil is automatically blocked after the time exceeding user's defined.
4. the special squirrel-cage pole-changing motor of three-phase according to claim 1, it is characterized in that, while the electric current flowing into the first coil is blocked after the time exceeding user's defined, electric current only flows into the second coil, or flowing into while the electric current of the second coil is blocked after the time exceeding user's defined, electric current only flows into the first coil.
5. the special squirrel-cage pole-changing motor of three-phase according to claim 1, is characterized in that, the external diameter of described stator is 270 ㎜, and internal diameter is 195 ㎜.
6. the special squirrel-cage pole-changing motor of three-phase according to claim 5, it is characterized in that, when the special squirrel-cage pole-changing motor of formation 3.7KW level three-phase, described first coil encloses with the dual winding 13 of the thickness of 1.00mm, and described second coil encloses with the dual winding 38 of the thickness of 0.85 ㎜.
7. the special squirrel-cage pole-changing motor of three-phase according to claim 5, it is characterized in that, when the special squirrel-cage pole-changing motor of formation 5.5KW level three-phase, described first coil by the coil of 1.00 ㎜ thicknesses, the coil of 0.90 ㎜ thickness and 0.85 ㎜ thickness coil respectively single winding 9 enclose, described second coil is enclosed by the single winding 32 of the coil of 0.80 ㎜ thickness, and the dual winding 32 of coil of 0.75 ㎜ thickness encloses.
8. a double speed crane, is characterized in that comprising the three-phase special squirrel-cage pole-changing motor any one of claim 1 to 7, wire being reeled or the spool of wire of unwinding, the transmission of power of being supplied by described motor is to the gear box of reel and the brake that is used for making the rotation of reel to stop by rotating.
9. double speed crane according to claim 8, is characterized in that, described brake independently controls First Speed and the second speed of described motor.
10. double speed crane according to claim 8, is characterized in that, described spool of wire possess groove with prevent wire reel or unwinding time push to the left and right.
11. double speed cranes according to claim 9, is characterized in that, the described spool of wire circumferentially length direction in face possesses anti-detachment framework and departs to prevent wire.
12. double speed cranes according to claim 9, is characterized in that, described spool of wire comprises for carrying out with described motor the reel disc-shaped flange that is connected.
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| KR10-2014-0054971 | 2014-05-08 | ||
| KR20140054971 | 2014-05-08 | ||
| KR10-2015-0051126 | 2015-04-10 | ||
| KR1020150051126A KR101542923B1 (en) | 2014-05-08 | 2015-04-10 | Enhanced squirrel-cage pole changing motor and two speed hoist comprising the same |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112745A (en) * | 1994-08-31 | 1995-11-29 | 周曼金 | Energy-saving multispeed whole-winding asynchronous machine |
| JPH08205441A (en) * | 1995-01-23 | 1996-08-09 | Hitachi Ltd | Three-phase motor |
| JPH08324978A (en) * | 1995-05-31 | 1996-12-10 | Nippon Hoisuto Kk | Electric hoist |
| CN1479434A (en) * | 2002-08-28 | 2004-03-03 | ��Ĭ���� | Capacity type motor with 4/6 pole shared winding fixed split-phase |
| CN201830051U (en) * | 2010-10-29 | 2011-05-11 | 无锡哈电电机有限公司 | Pole-changing speed control duplex-winding coil structure |
-
2015
- 2015-04-10 KR KR1020150051126A patent/KR101542923B1/en active IP Right Grant
- 2015-05-08 CN CN201510232627.4A patent/CN105099110B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112745A (en) * | 1994-08-31 | 1995-11-29 | 周曼金 | Energy-saving multispeed whole-winding asynchronous machine |
| JPH08205441A (en) * | 1995-01-23 | 1996-08-09 | Hitachi Ltd | Three-phase motor |
| JPH08324978A (en) * | 1995-05-31 | 1996-12-10 | Nippon Hoisuto Kk | Electric hoist |
| CN1479434A (en) * | 2002-08-28 | 2004-03-03 | ��Ĭ���� | Capacity type motor with 4/6 pole shared winding fixed split-phase |
| CN201830051U (en) * | 2010-10-29 | 2011-05-11 | 无锡哈电电机有限公司 | Pole-changing speed control duplex-winding coil structure |
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Address after: Gyeonggi Do, South Korea Patentee after: SUNGDO MACHINERY CO., LTD. Address before: Inchon, South Korea Patentee before: SUNGDO MACHINERY CO., LTD. |