CN103872832B - Anti-explosion variable frequency motor - Google Patents
Anti-explosion variable frequency motor Download PDFInfo
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- CN103872832B CN103872832B CN201410060336.7A CN201410060336A CN103872832B CN 103872832 B CN103872832 B CN 103872832B CN 201410060336 A CN201410060336 A CN 201410060336A CN 103872832 B CN103872832 B CN 103872832B
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Abstract
The invention discloses an anti-explosion variable frequency motor, comprising a shell, a motor assembly, a variable frequency control device, a filter wiring device and an outer water cooling unit, wherein a first cavity chamber, a second cavity chamber and a third cavity chamber which are separated from one another and communicated with one another are arranged in the shell; the motor assembly is arranged in the first cavity chamber; the variable frequency control device is arranged in the second cavity chamber and is electrically connected with the motor assembly; the filter wiring assembly is arranged in the third cavity chamber. According to the anti-explosion variable frequency motor, the motor assembly, the variable frequency control device and the filter wiring device are arranged in the first to third cavity chambers which are communicated with each other; so the structure of the anti-explosion motor becomes more compact and reasonable; meanwhile, the wiring difficulty among the motor assembly, the variable frequency device and the filter wiring device is reduced, the electromagnetic interference of a cable to other equipment outside the shell is reduced, and the stability of the anti-explosion variable frequency motor is improved.
Description
Technical field
The present invention relates to flame-proof converter technical field, specifically, particularly to a kind of explosion-proof variable frequency motor.
Background technology
Converter is, using the effect that turns on and off of semiconductor power device, industrial-frequency alternating current is transformed to frequency-adjustable
Alternating current converting means.This device is first transformed to unidirectional current industrial-frequency alternating current, then is frequency-adjustable DC power conversion
Alternating current carry out driving load.Consider the working environment at coal mines such as colliery there is narrow space, humidity, in the air contain inflammable and explosive
The feature of composition, universal converter is forbidden in down-hole application.Explosion-proof frequency converter is exactly directed to this special environment electricity
Machine equipment carries out the product of frequency modulation.
Converter and motor for underground coal mine are all detached, and that is, an explosion-proof frequency converter passes through up to a hundred meters of cables even
Connect one or two motors.This kind of connected mode has the disadvantage that：Overall space takies big, wiring inconvenience, converter and electricity
Machine connection cable is run to the electromagnetic interference peripheral equipment in space, converter is longer to motor cable, can cause harmonic wave
Reflection and superposition, improve crest voltage, and easily damage electrical machine insulation, converter and motor are in down-hole weak heat-dissipating etc..
Additionally, because being limited by volume, the electric pressure of explosion-proof frequency converter can only be accomplished in 1140V it is impossible to meet coal
The demand to high-voltage high-power frequency transformator for the charcoal enterprise.
Content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.For this reason, the present invention
One purpose is to propose the high explosion-proof variable frequency motor of a kind of small volume, stability.
Explosion-proof variable frequency motor according to embodiments of the present invention, including：Housing, has three and is spaced apart from each other in described housing
And first chamber, second chamber and the 3rd chamber connecting；Electric machine assembly, described electric machine assembly is located in described first chamber；
Frequency-converting control device, described frequency-converting control device is located in described second chamber, described frequency-converting control device and described group of motors
Part electrically connects；Filtering termination, described filtering termination is located at described 3rd within the chamber, and described filtering termination is respectively
It is connected with described electric machine assembly and described frequency-converting control device；And outer water cooling unit, described outer water cooling unit is located at described shell
With to described frequency-converting control device and described filtering termination heat exchange on body lateral wall.
Explosion-proof variable frequency motor according to embodiments of the present invention, by connecing electric machine assembly, frequency-converting control device and filtering
Traditional thread binding be set in the first to the 3rd within the chamber being interconnected, make the structure of explosion-proof variable frequency motor compacter, reasonable.Meanwhile,
Reduce electric machine assembly, frequency-converting control device and filtering termination between wiring difficulty, decrease cable to housing outside
The electromagnetic interference of the other equipment in portion, improves the stability of explosion-proof variable frequency motor.
In addition, explosion-proof variable frequency motor according to the above embodiment of the present invention, can also have the technical characteristic adding as follows：
According to one embodiment of present invention, described second chamber is located at the top of described first chamber, described 3rd chamber
Room is located at one end of described first chamber and described second chamber.Using length and the height space of electric machine assembly, by frequency conversion control
Device processed, filtering termination and electric machine assembly become one, and reduce the volume of explosion-proof variable frequency motor, shorten motor
The length of connection cable between assembly and frequency-converting control device, reduces reflection and the superposition of harmonic wave, meanwhile, also reduces peak value
The impact to explosion-proof variable frequency motor insulating properties for the voltage.
According to one embodiment of present invention, by being formed at described between described second chamber and described first chamber
Gap connection on one chamber roof.Specifically, described gap is rectangle or circular gap.Thus, simplify wiring process, subtract
Lack the electromagnetic interference of the other equipment to hull outside for the cable, improve the stability of explosion-proof variable frequency motor.The present invention's
In some specific examples, gap can be rectangle or circular gap.It is understood that the structure of gap is not limited to this,
As long as it can be easy to be connected with each other between electric machine assembly and frequency-converting control device.
According to some specific examples of the present invention, described first chamber is by the cylindrical stator set being located in described housing
Limit.Described cylindrical stator set is soldered to the bottom in described housing.According to other embodiments of the present invention, described change
Audio-frequency control device is supported on the top of described cylindrical stator set, the roof of described cylindrical stator set has upwardly extending
Support column, described frequency-converting control device is supported on the top of described cylindrical stator set by described support column.Thus, institute can be made
State frequency-converting control device to be fixedly mounted in second chamber.
According to one embodiment of present invention, described frequency-converting control device includes：Direct current stack bus bar；Multiple stackings are placed
Single-phase frequency-variable module, the plurality of single-phase frequency-variable module is all connected with described direct current stack bus bar；For to described single-phase change
The interior water cooling unit that frequency module is cooled down；And multiple DC filter capacitor group, described DC filter capacitor group is straight with described
Stream stack bus bar connects.
Thus, by placing single-phase frequency-variable module and the stacking of DC filter capacitor group, improve frequency-converting control device and exist
Compact conformation degree in length, width and height space, not only can reduce the volume of frequency-converting control device, make VFC
The structure of device is compacter, reasonable, and also helps the electric equipment compartment increasing between high voltage device and housing away from being also beneficial to
Set up electric insulation protection device around high voltage device, improve the High-Voltage Insulation performance of frequency-converting control device.Additionally, becoming
Water cooling unit in setting in audio-frequency control device, improves the radiating efficiency of frequency-converting control device.
According to one embodiment of present invention, described interior water cooling unit includes：Water pump；At least one cooling water channel, described
At least one cooling water channel is located in described single-phase frequency-variable module, and each described cooling water channel has water inlet and outlet；Enter
Water separator, described enter water separator connect with the water inlet of water pump and at least one cooling water channel described respectively；Water outlet separates
Device, described go out water separator connect with the outlet of water pump and at least one cooling water channel described respectively.In the presence of water pump,
Deionized water enters cooling water channel by entering water separator, and carries out heat exchange in cooling water channel, finally by going out water separator 234
Return in water pump, and then achieve the cooling to single-phase frequency-variable module for the interior water cooling unit.Thus, improve single-phase frequency-variable module
Radiating efficiency.
Further, described interior water cooling unit also includes water water- to-water heat exchanger, and described water water- to-water heat exchanger is connected to described water outlet
Between separator and described water pump, wherein said outer water cooling unit is connected with described interior water cooling unit by described water water- to-water heat exchanger
To realize heat exchange.In interior water cooling unit, the higher deionized water of temperature becomes the deionization of low temperature after water water- to-water heat exchanger
Water, the relatively low deionized water of temperature again through water pump, enter water separator and enter in cooling water channel, and single-phase frequency-variable module is entered
Row cooling.Thus, improve the heat exchange efficiency of interior water cooling unit, simplify the structure of explosion-proof variable frequency motor.
Preferably, the plurality of single-phase frequency-variable module stacking is placed and is connected to described direct current stack bus bar side, described
Multiple DC filter capacitor group stackings are placed and are connected to the opposite side of described direct current stack bus bar.Thus, it is possible to make full use of
Second chamber internal height space, is conducive to high-low pressure element subregion to arrange, it is to avoid high voltage device produces electromagnetism to low voltage component
Interference.
According to one embodiment of present invention, it is provided with multiple supporting parts between adjacent two described single-phase frequency-variable modules.
Thus, multiple single-phase frequency-variable modules can be made to be securely attached together, thus improve the structural stability of frequency-converting control device.
According to some specific embodiments of the present invention, described single-phase frequency-variable module includes three, each described single-phase change
Frequency module includes：Many stack bus bars, both positive and negative polarity layer that described many stack bus bars include from top to bottom stacking gradually, interconnection layer, zero
Layer and exchange articulamentum, wherein said both positive and negative polarity layer, interconnection layer, zero layer and exchange articulamentum between every adjacent two layers it
Between be respectively equipped with interlayer insulating film, the upper surface of described both positive and negative polarity layer is equipped with the first insulating coating, described exchange articulamentum
Lower surface be equipped with the second insulating coating；Metal support, it is female that described metal support is disposed on described many laminations
The lower section of row, has described cooling water channel in wherein said metal support；And insulation adnexa, described insulation adnexa is located at institute
State the side of metal support and be connected with described many stack bus bars and described metal support.
It should be noted that setting up insulation adnexa between many stack bus bars and metal support, by controlling insulation attached
The length of part is increasing the creep age distance between many stack bus bars and metal support, and then so that many stack bus bars is supported with metal
Spacing between portion is reduced to the thickness of insulation adnexa, so that single-phase frequency-variable module need not be subject to electric effect of distance, thus, carries
The high compact conformation degree of single-phase frequency-variable module, reduces the volume of frequency-converting control device.In addition, the number of plies by many stack bus bars
Increase to four layers, single-phase frequency-variable module can be made to be applied to high-power frequency conversion control device.
According to one embodiment of present invention, in described metal support, there is cooling water channel described at least one.Thus,
Metal support temperature rise can be reduced, the heat-sinking capability of water cooling unit in raising.
According to one embodiment of present invention, the water inlet of every described cooling water channel and outlet are respectively positioned on described metal
The same side of supporting part.Preferably, every described cooling water channel is all formed as U-shaped water channel.Thus, it is easy to the row of cooling water channel
Cloth, reduces the design difficulty of interior water cooling unit.
It is connected with insulation adnexa and other electric elements for convenience of many stack bus bars, according to an enforcement of the present invention
Example, one end of the neighbouring described insulation adnexa of described exchange articulamentum has multiple first connection terminals spaced apart, described
First connection terminal is connected with described insulation adnexa.
Specifically, described first connection terminal includes：Flat part, described flat part from described exchange articulamentum extend and
With described to exchange articulamentum in the same plane；And with described flat part bending part connected vertically, described bending part with
Described insulation adnexa connects.Alternatively, described bending part and described insulation adnexa are bolted.
It is connected with direct current stack bus bar and other electric elements, according to a reality of the present invention for convenience of many stack bus bars
Apply example, one end of the neighbouring described direct current stack bus bar of described zero layer is configured with the second connection terminal, the neighbour of described both positive and negative polarity layer
One end of closely described direct current stack bus bar is configured with two the 3rd connection terminals spaced apart, described second connection terminal and institute
State the 3rd connection terminal to be connected with described direct current stack bus bar respectively.
According to one embodiment of present invention, described many stack bus bars further include：Insulation strip, wherein said both positive and negative polarity
Each layer in layer, interconnection layer and exchange articulamentum is equipped with described insulation strip；And conductive pole, wherein said both positive and negative polarity
All rivetings on each layer in layer, interconnection layer, zero layer and exchange articulamentum have multiple described conductive poles, described on wherein every layer
Multiple conductive poles pass through insulating washer electrical isolation with other layers.Thus, increased many stack bus bars and electric elements connection position
The electric equipment compartment put is away from increasing creep age distance, improve many stack bus bars integral insulation performance.
According to some embodiments of the present invention, the described both positive and negative polarity layer of described many stack bus bars, interconnection layer, zero layer and friendship
By thickness, the copper plate for 1.5mm-2.5mm folds and forms stream articulamentum, the described both positive and negative polarity layer of described many stack bus bars, mutually
Even the surface of layer, zero layer and exchange articulamentum all carries out tin plating process, and thickness of coating is more than 5 μm.Thus, improve copper plate
Oxidation resistance.The upper surface roughness requirements of described metal support are less than 1.6um-3.2um, and planarity requirements are less than
0.1mm/m.Thus, can make there is good contact effect between electric elements and metal support, be conducive to interior water cooling unit pair
Electric elements on metal support are radiated.
According to one embodiment of present invention, described first insulating coating and described second insulating coating neighboring edge
Processed using pressing edge sealing process, so that forming total enclosing structure between the first insulating coating and the second insulating coating.By
This, can prevent from entering in many stack bus bars and leading to the decreasing insulating of many stack bus bars because of dust, moisture, preferably
Ground, the first insulating coating and the second insulating coating neighboring are processed along using pressing edge sealing process, so that the first insulating bag
Form total enclosing structure between coating and the second insulating coating.
Brief description
Fig. 1 is the perspective view of the housing of explosion-proof variable frequency motor according to an embodiment of the invention；
Fig. 2 is the axonometric chart of the partial shell of explosion-proof variable frequency motor according to an embodiment of the invention；
Fig. 3 is the axonometric chart of the partial shell of explosion-proof variable frequency motor according to an embodiment of the invention；
Fig. 4 is the axonometric chart of the partial shell of explosion-proof variable frequency motor according to an embodiment of the invention；
Fig. 5 is the front view of the frequency-converting control device of explosion-proof variable frequency motor according to an embodiment of the invention；
Fig. 6 is the top view of the frequency-converting control device of explosion-proof variable frequency motor according to an embodiment of the invention；
Fig. 7 is the front view of the single-phase frequency-variable module of explosion-proof variable frequency motor according to an embodiment of the invention；
Fig. 8 is the upward view of the single-phase frequency-variable module of explosion-proof variable frequency motor according to an embodiment of the invention；
Fig. 9 is the axonometric chart of the single-phase frequency-variable module of explosion-proof variable frequency motor according to an embodiment of the invention；
Figure 10 is the sectional view of the metal support of explosion-proof variable frequency motor according to an embodiment of the invention；
Figure 11 is that the stereo decomposing of many stack bus bars of explosion-proof variable frequency motor according to an embodiment of the invention is illustrated
Figure；
Figure 12 is the axonometric chart of the water water- to-water heat exchanger of explosion-proof variable frequency motor according to an embodiment of the invention；
Figure 13 is the schematic diagram of the interior water cooling unit of explosion-proof variable frequency motor according to an embodiment of the invention.
Reference：
Housing 100,
First chamber 110, gap 111, cylindrical stator set 112,
Second chamber 120, the 3rd chamber 130,
Frequency-converting control device 200,
Direct current stack bus bar 210,
Single-phase frequency-variable module 220,
Many stack bus bars 221, both positive and negative polarity layer 2211, the 3rd connection terminal 22111, interconnection layer 2212, zero layer 2213, second
Connection terminal 22131, exchanges articulamentum 2214, the first connection terminal 22141, flat part 22142, bending part 22143, interlayer is exhausted
Edge layer 2215, the first insulating coating 2216, the second insulating coating 2217, insulation strip 2218, conductive pole 2219, insulating washer
2220,
Metal support 222, insulate adnexa 223, anti-tracking collets 224,
Interior water cooling unit 230,
Water pump 231, cooling water channel 232, water inlet 2321, outlet 2322,
Enter water separator 233, go out water separator 234, water water- to-water heat exchanger 235,
DC filter capacitor group 240,
Supporting part 250.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary it is intended to be used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention it is to be understood that term " longitudinal ", " horizontal ", " length ", " width ", " thickness ",
" on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", the orientation of instruction such as " outward " or
Position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of the description present invention and simplifies description, and not
It is instruction or the hint device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In describing the invention, " multiple " are meant that two or more,
Unless otherwise expressly limited specifically.
As shown in Fig. 1-Figure 13, explosion-proof variable frequency motor according to embodiments of the present invention, including：Housing 100, electric machine assembly
（Not shown）, frequency-converting control device 200, filtering termination（Not shown）And outer water cooling unit 300（Not shown）.
Specifically, there is in housing 100 three first chambers being spaced apart from each other and connecting 110, second chamber 120 and
3rd chamber 130.It is interconnected by explosion-insulation surface between first to the 3rd chamber 130, can effectively reduce explosion suppresion surface
Quantity, reduces the complex degree of structure of explosion-proof variable frequency motor.As shown in figs 2-4, electric machine assembly is located at first chamber 110
Interior, frequency-converting control device 200 is located in second chamber 120, and filtering termination is located in the 3rd chamber 130.It is interconnected
First to the 3rd chamber 130 is configured to same explosion-proof chamber, then electric machine assembly, frequency-converting control device 200 and filtering wiring are filled
Connection cable between putting shields in flame proof intracavity, it is to avoid the design of the labyrinth such as wire connection cavity, binding post, reduces wiring
Difficulty, decreases the electromagnetic interference to the other equipment outside housing 100 for the cable, improves the stability of explosion-proof variable frequency motor.
Electric machine assembly is connected respectively with frequency-converting control device 200 and filtering termination.Outer water cooling unit 300 is located at housing
With to frequency-converting control device 200 and filtering termination heat exchange on 100 lateral walls.Thus, reduce the body of explosion-proof variable frequency motor
Long-pending, improve the heat exchange efficiency of outer water cooling unit 300.
Explosion-proof variable frequency motor according to embodiments of the present invention, by by electric machine assembly, frequency-converting control device 200 and filtering
Termination is located in the first to the 3rd chamber 130 being interconnected, and makes the structure of explosion-proof variable frequency motor compacter, reasonable.
Meanwhile, reduce the wiring difficulty between electric machine assembly, frequency-converting control device 200 and filtering termination, decrease cable
Electromagnetic interference to the other equipment outside housing 100, improves the stability of explosion-proof variable frequency motor.
As shown in figure 1, for the volume reducing explosion-proof variable frequency motor further, according to one embodiment of present invention,
Two chambers 120 are located at the top of first chamber 110, and the 3rd chamber 130 is located at one end of first chamber 110 and second chamber 120
（Right-hand member as shown in Figure 1）.First chamber 110 can be respectively communicated with second chamber 120, the 3rd chamber 130.Using motor
The length of assembly（Above-below direction as shown in Figure 1）And height（Above-below direction as shown in Figure 1）Space, by VFC
Device 200, filtering termination and electric machine assembly become one, and reduce the volume of explosion-proof variable frequency motor, shorten electricity
The length of connection cable between thermomechanical components and frequency-converting control device 200, reduces reflection and the superposition of harmonic wave, also reduces meanwhile
The impact to explosion-proof variable frequency motor insulating properties for the crest voltage.
Additionally, it should be noted that, by second chamber 120 located at the top of first chamber 110, also help high-low pressure unit
Part subregion arrangement, thus avoiding the electromagnetic interference to low voltage component for the high voltage device, improve second chamber 120 inner height,
Compact conformation degree in length and width spaces, not only contribute to increase electric equipment compartment between high voltage device and housing 100 away from,
It is also beneficial to set up electric insulation protection device around high voltage device, improve the High-Voltage Insulation performance of explosion-proof variable frequency motor.
As shown in Fig. 2 according to one embodiment of present invention, pass through between second chamber 120 and first chamber 110 to be formed
Gap 111 on first chamber 110 roof connects.Thus, simplify wiring process, decrease cable to housing 100 outside
Other equipment electromagnetic interference, improve the stability of explosion-proof variable frequency motor.In some specific examples of the present invention, gap
111 can be rectangle or circular gap.It is understood that the structure of gap 111 is not limited to this, as long as it can be easy to electricity
It is connected with each other between thermomechanical components and frequency-converting control device 200.
As shown in Fig. 2 according to a specific example of the present invention, first chamber 110 is by the cylinder being located in housing 100
Shape stator sleeve 112 limits, and electric machine assembly can be placed in cylindrical stator set 112.Alternatively, cylindrical stator set 112 can
To be soldered to the bottom in housing 100.It is, of course, understood that the connected mode of cylindrical stator set 112 and housing 100
It is not limited to this, for example, cylindrical stator set 112 can also be integrally formed with housing 100.
As shown in Fig. 2 according to one embodiment of present invention, frequency-converting control device 200 is supported on cylindrical stator set 112
Top.Thus, frequency-converting control device 200 can be made to be securely disposed in second chamber 120.Specifically, the one of the present invention
In individual embodiment, the roof of cylindrical stator set 112 has upwards（As shown in the direction in Fig. 2）The support column extending（Figure
Not shown）, frequency-converting control device 200 by support column be supported on cylindrical stator set 112 top.Support column can be welded on
On the roof of cylindrical stator set 112.It should be noted that for support column and cylindrical stator set 112 connected mode simultaneously
Not limited to this.Certainly, the modes of emplacement of frequency-converting control device 200 can as the case may be depending on.For example, frequency-converting control device
200 can also be suspended in second chamber 120.
As shown in Fig. 5-Fig. 9, according to one embodiment of present invention, frequency-converting control device 200 includes：Direct current stack bus bar
210th, multiple single-phase frequency-variable modules 220, interior water cooling unit 230 and multiple DC filter capacitor group 240.Specifically, multiple
The single-phase frequency-variable module 220 that stacking is placed, DC filter capacitor group 240 are all connected with direct current stack bus bar 210.Interior water cooling unit
230 are used for single-phase frequency-variable module 220 is cooled down, thus, it is possible to improve the radiating efficiency of single-phase frequency-variable module 220.Direct current
Four groups of electric capacity that filter capacitor group 240 can be placed for stacking, thus, it is possible to reduce the body of frequency-converting control device 200 further
Long-pending, make the structure of frequency-converting control device 200 compacter, reasonable.
Thus, by single-phase frequency-variable module 220 and DC filter capacitor group 240 are laminated placement, improve VFC
Compact conformation degree in length, width and height space for the device 200, not only can reduce the body of frequency-converting control device 200
Long-pending, make the structure of frequency-converting control device 200 compacter, reasonable, and also help between increase high voltage device and housing 100
Electric equipment compartment away from being also beneficial to set up electric insulation protection device around high voltage device, improve frequency-converting control device 200
High-Voltage Insulation performance.Additionally, water cooling unit 230 in setting in frequency-converting control device 200, improve frequency-converting control device 200
Radiating efficiency.
As shown in figure 13, according to one embodiment of present invention, interior water cooling unit 230 includes：Water pump 231, cooling water channel
232nd, enter water separator 233 and go out water separator 234.Specifically, it is provided with least one cooling water in single-phase frequency-variable module 220
Road 232, each cooling water channel 232 has water inlet 2321 and outlet 2322.Enter water separator 233 respectively with water pump 231 and
The water inlet 2321 of at least one cooling water channel 232 connects.Go out water separator 234 respectively with water pump 231 and at least one cooling
The outlet 2322 of water channel 232 connects.
In the presence of water pump 231, deionized water enters cooling water channel 232 by entering water separator 233, and in cooling water
Carry out heat exchange in road 232, finally returned in water pump 231 by going out water separator 234, and then it is right to achieve interior water cooling unit 230
The cooling of single-phase frequency-variable module 220.Thus, improve single-phase frequency-variable module 220 radiating efficiency.
As shown in Figure 12-Figure 13, further, interior water cooling unit 230 also includes water water- to-water heat exchanger 235, water water heat exchange
Device 235 is connected to out between water separator 234 and water pump 231, its China and foreign countries' water cooling unit 300 pass through water water- to-water heat exchanger 235 with interior
Water cooling unit 230 connects to realize heat exchange.Specifically, water water- to-water heat exchanger 235 internal welding is connected to heat exchanger fin, interior water cooling unit 230
With outer water cooling unit 300, heat exchange is carried out by heat exchanger fin.
In interior water cooling unit 230 the higher deionized water of temperature become after water water- to-water heat exchanger 235 low temperature go from
Sub- water, the relatively low deionized water of temperature again through water pump 231, enter water separator 233 and enter in cooling water channel 232, and to list
Phase transformation frequency module 220 is lowered the temperature.Thus, improve the heat exchange efficiency of interior water cooling unit 230, simplify explosion-proof variable frequency motor
Structure.It is understood that interior water cooling unit 230 is not limited to this with the heat exchange mode of outer water cooling unit 300, for example, also may be used
So that water water- to-water heat exchanger 235 is substituted using other heat exchange modes such as heat pipe, water oil heat exchangers, so that the structure of explosion-proof variable frequency motor is more
Step up to gather.
As shown in Fig. 5-Fig. 6, according to one embodiment of present invention, multiple single-phase frequency-variable module 220 stackings are placed and are connected
It is connected on direct current stack bus bar 210 side, multiple DC filter capacitor group 240 stackings are placed and are connected to direct current stack bus bar 210
Opposite side.Thus, it is possible to make full use of second chamber 120 internal height space, be conducive to high-low pressure element subregion to arrange, keep away
Exempt from high voltage device and electromagnetic interference is produced to low voltage component.
The single-phase frequency-variable module 220 that stacking is placed and DC filter capacitor group 240 reduce setting of direct current stack bus bar 210
Meter difficulty, reduces the stray inductance of direct current stack bus bar 210, decreases due to voltage spikes to electric elements and master row insulating performance
The infringement causing, makes direct current stack bus bar 210 have stronger Electromagnetic Compatibility.Meanwhile, also help increase high voltage device
Electric equipment compartment and housing 100 between away from, be easy to set up electric insulation protection device around high voltage device, improve flame-proof converter electricity
The High-Voltage Insulation performance of machine.Additionally, the stacking of single-phase frequency-variable module 220 to be placed on the side of DC master row layer, it is easy to interior water-cooled
Unit 230 carries out independent radiating to each single-phase frequency-variable module 220, reduces the design difficulty of interior water cooling unit 230.Separately
Outward, DC filter capacitor group 240 stacking is placed on the opposite side of direct current stack bus bar 210, frequency-converting control device can also be made
200 structure is compacter, reduces the volume of frequency-converting control device 200.
As shown in figure 5, according to one embodiment of present invention, it is provided with many between two adjacent single-phase frequency-variable modules 220
Individual supporting part 250.Thus, multiple single-phase frequency-variable modules 220 can be made to be securely attached together, thus improve VFC dress
Put 200 structural stability.
In some specific embodiments of the present invention, single-phase frequency-variable module 220 includes three.As shown in Fig. 5-Figure 11,
Each single-phase frequency-variable module 220 includes：Many stack bus bars 221, metal support 222 and insulation adnexa 223.Specifically, such as
Shown in Figure 11, both positive and negative polarity layer 2211 that many stack bus bars 221 include from top to bottom stacking gradually again, interconnection layer 2212, zero layer
2213 and exchange articulamentum 2214.Alternatively, the both positive and negative polarity layer 2211 of many stack bus bars 221, interconnection layer 2212, zero layer 2213
And exchange articulamentum 2214 all the copper plate for 1.5mm-2.5mm can be folded and forms by thickness.In order to improve copper plate
Oxidation resistance, the both positive and negative polarity layer 2211 of many stack bus bars 221, interconnection layer 2212, zero layer 2213 and exchange articulamentum 2214
Surface all carry out tin plating process, thickness of coating be more than 5 μm.Preferably, both positive and negative polarity layer 2211, interconnection layer 2212, zero layer 2213
And it is respectively equipped with interlayer insulating film 2215 between the every adjacent two layers between exchange articulamentum 2214.Both positive and negative polarity layer 2211 upper
Surface is equipped with the first insulating coating 2216, and the lower surface of exchange articulamentum 2214 is equipped with the second insulating coating 2217.
Thus, improve insulating properties under the rugged environments such as humidity, dust storm for many stack bus bars 221.Wherein in order to prevent because of ash
Dirt, moisture enter in many stack bus bars 221 and lead to the decreasing insulating of many stack bus bars 221 it is preferable that first insulate
Clad 2216 and the second insulating coating 2217 neighboring are processed along using pressing edge sealing process, so that the first insulating coating
2216 and second form total enclosing structure between insulating coating 2217.
Metal support 222 is disposed on the lower section of many stack bus bars 221, is located at metal support 222 in order to support
On electric elements（Not shown）.Alternatively, the upper surface roughness requirements of metal support 222 are less than 1.6um-3.2um,
Planarity requirements are less than 0.1mm/m.Thus, can make there is good contact effect between electric elements and metal support 222, have
Beneficial to interior water cooling unit 230, the electric elements on metal support 222 are radiated.As shown in Figure 10, metal support 222
Inside also there is cooling water channel 232.For reducing the volume of metal support 222, cooling water channel 232 using the flat width in section and can become
The cooling water channel of rectangle.Thus, in the case of identical turnover discharge, reduce metal support 222 temperature rise, improve
The heat-sinking capability of interior water cooling unit 230.It is understood that the structure of cooling water channel 232 is not limited to this.
Insulation adnexa 223 is located at the side of metal support 222, and connects with metal support 222 and many stack bus bars 221
Connect, in order to increase the creep age distance between many stack bus bar 221 outfans and metal support 222.By setting insulation adnexa
223, the spacing between many stack bus bars 221 and metal support 222 can be reduced to the thickness of insulation adnexa 223, thus
Need not be subject to electric effect of distance, and then improve the compact conformation degree of single-phase frequency-variable module 220, reduce frequency-converting control device
200 volume.
It should be noted that setting up insulation adnexa 223 between many stack bus bars 221 and metal support 222, by control
The length of system insulation adnexa is increasing the creep age distance between many stack bus bars and metal support, and then makes many stack bus bars
Spacing between 221 and metal support 222 is reduced to the thickness of insulation adnexa 223, so that single-phase frequency-variable module 220 need not
By electric effect of distance, thus, improve the compact conformation degree of single-phase frequency-variable module 220, reduce the body of frequency-converting control device
Long-pending.In addition, the number of plies of many stack bus bars 221 is increased to four layers, single-phase frequency-variable module 220 can be made to be applied to high-power frequency conversion control
Device processed.
As shown in Figure 10, according to some embodiments of the present invention, there is in metal support 222 at least one cooling water channel
232, to cool down to single-phase frequency-variable module 220.Preferably, the water inlet 2321 of every cooling water channel 232 and outlet
2322 the same sides that all may be located at metal support 222.Thus, it is easy to the arrangement of cooling water channel 232, reduce interior water-cooled list
The design difficulty of unit 230.Specifically, every cooling water channel 232 all can be formed as U-shaped water channel.Certainly, cooling water channel 232
Structure is not limited to this, as long as it can meet the cooling requirements of single-phase frequency-variable module 220.
As shown in figure 11, link together with insulation adnexa 223 for convenience of by many stack bus bars 221, according to the present invention's
One embodiment, one end of the neighbouring insulation adnexa 223 of exchange articulamentum 2214 has multiple first connection ends spaced apart
Son 22141, the first connection terminal 22141 is connected with insulation adnexa 223.Certainly, attached in the neighbouring insulation of exchange articulamentum 2214
One end of part 223 arranges multiple first connection terminals 22141 spaced apart, is also convenient for many stack bus bars 221 and other electrical equipment
Element connects.
In some specific examples of the present invention, the first connection terminal 22141 includes：Flat part 22142 and bending part
22143.Specifically, flat part 22142 extends and is generally aligned in the same plane with exchanging articulamentum 2214 from exchange articulamentum 2214
On, bending part 22143 is vertical with flat part 22142 to be connected.It should be noted that for many stack bus bars 221 and insulation adnexa
223 connected mode does not do particular restriction.For example, in an optional embodiment of the present invention, bending part 22143 with absolutely
Edge adnexa 223 is bolted.
It is connected with direct current stack bus bar 210, as shown in figure 11, according to one of the present invention for convenience of many stack bus bars 221
Embodiment, in zero layer 2213, one end of adjacent DC stack bus bar 210 is provided with the second connection terminal 22131, both positive and negative polarity layer 2211
One end of upper adjacent DC stack bus bar 210 is provided with two the 3rd connection terminals 22111 spaced apart, the second connection terminal
22131 and the 3rd connection terminal 22111 be connected with direct current stack bus bar 210 respectively.For the second connection terminal 22131 and the 3rd
The relative position of connection terminal 22111 does not do particular determination, as long as it can be easy to many stack bus bars 221 with other electric elements even
Connect.For example, as shown in figure 1, the second connection terminal 22131 is located between two the 3rd connection terminals 22111.
According to one embodiment of present invention, many stack bus bars 221 further include：Insulation strip 2218 and conductive pole
2219.Specifically, each layer in both positive and negative polarity layer 2211, interconnection layer 2212 and exchange articulamentum 2214 is equipped with insulation strip
2218.It should be noted that the number of insulation strip 2218 on each layer and position can as the case may be depending on, example
As an insulation strip 2218 being provided with both positive and negative polarity layer 2211, interconnection layer 2212 can be provided with four insulation strip 2218.Just
All rivetings on each layer in negative electrode layer 2211, interconnection layer 2212, zero layer 2213 and exchange articulamentum 2214 have multiple conductive poles
2219, the multiple conductive poles 2219 on wherein every layer and other layers pass through insulating washer 2220 electrical isolation.
Also, it should be noted as shown in fig. 7, being equipped with multiple anti-in the upper and lower surface of many stack bus bars 221
Climb electric insulation block 224.It is provided with the phase with anti-tracking collets 224 at the top of the electric elements being connected with many stack bus bars 221
The anti-tracking groove of coupling.Thus, increased the electric equipment compartment of many stack bus bars 221 and electric elements link position away from increasing
Creep age distance, improves many stack bus bar 221 integral insulation performances.
In addition it is also necessary to explanation, many stack bus bars 221 are by phase between conductive pole 2219 and corresponding electric elements
Mutually electrical connection is realized in contact.It is highly consistent that the conductive pole 2219 of connecting circuit element side stretches out.Thus, many laminations can be made
The structure of busbar 221 is more reasonable, compact.When different busbar layers press conductive pole 2219, insulating washer 2220 can be passed through
Cut off the annexation between many stack bus bars 221 and corresponding electric elements, thus reducing the internal electricity of many stack bus bars 221
The loop area that stream is formed, reduces many stack bus bar 221 stray inductances.
In sum, explosion-proof variable frequency motor according to embodiments of the present invention has advantages below：
1）By by electric machine assembly, frequency-converting control device 200 and filtering termination be located at be interconnected first to
In 3rd chamber 130, make the structure more compact and reasonable of explosion-proof variable frequency motor, reduce electric machine assembly, frequency-converting control device 200
And the wiring difficulty between filtering termination；
2）First being interconnected is configured to an explosion-proof chamber to the 3rd chamber 130, and electric machine assembly, VFC are filled
Put 200 and filtering termination be located at flame proof intracavity, decrease the quantity of explosion suppresion surface, reduce the structure of explosion-proof variable frequency motor
Complexity.Meanwhile, also shorten the length of the cable between electric machine assembly, frequency-converting control device 200 and filtering termination
Degree, reduces the electromagnetic interference to the other equipment outside housing 100 for the cable, improves the stability of explosion-proof variable frequency motor；
3）By single-phase frequency-variable module 220 and DC filter capacitor group 240 are laminated placement, improve frequency-converting control device
The 200 compact conformation degree in length, width and height space, not only reduce the volume of frequency-converting control device 200, and
Also help the electric equipment compartment increasing between high voltage device and housing 100 away from reducing stray inductance and the electricity of direct current stack bus bar 210
The infringement that pointing peak causes to electric elements and master row insulating performance, is conducive to setting up electric insulation protection around high voltage device
Device, improves the High-Voltage Insulation performance of explosion-proof variable frequency motor；
4）Water cooling unit 230 in setting in the single-phase frequency-variable module 220 of frequency-converting control device 200, reduces interior water-cooled
The design difficulty of unit 230, improves the radiating efficiency of frequency-converting control device 200；
5）By setting up insulation adnexa 223 between many stack bus bars 221 and metal support 222, can be female by many laminations
Spacing between row 221 and metal support 222 is reduced to the thickness of insulation adnexa 223, so that single-phase frequency-variable module 220 is not
Must be subject to electric effect of distance, and then improve the compact conformation degree of single-phase frequency-variable module 220, reduce the body of frequency-converting control device
Long-pending；
6）The number of plies of many stack bus bars 221 is increased to four layers, single-phase frequency-variable module 220 can be made to be applied to high-power frequency conversion
Control device 200.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
Combine in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combine.
Although embodiments of the invention have been shown and described above it is to be understood that above-described embodiment is example
Property it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (24)
1. a kind of explosion-proof variable frequency motor is it is characterised in that include：
Housing, has three first chambers being spaced apart from each other and connecting, second chamber and the 3rd chamber in described housing, described
First chamber is interconnected by explosion-insulation surface to described 3rd chamber；
Electric machine assembly, described electric machine assembly is located in described first chamber；
Frequency-converting control device, described frequency-converting control device is located in described second chamber, described frequency-converting control device and described electricity
Thermomechanical components electrically connect, and described frequency-converting control device includes direct current stack bus bar, interior water cooling unit, the single-phase change of multiple stacking placement
Frequency module and multiple DC filter capacitor group, multiple described single-phase frequency-variable module stackings are placed and are connected to described direct current lamination mother
Row side, the plurality of DC filter capacitor group stacking is placed and is connected to the opposite side of described direct current stack bus bar, each institute
State single-phase frequency-variable module and include metal support, insulation adnexa and many stack bus bars, described many stack bus bars are included from top to bottom
The both positive and negative polarity layer that stacks gradually, interconnection layer, zero layer and exchange articulamentum, wherein said both positive and negative polarity layer, interconnection layer, zero layer and
It is respectively equipped with interlayer insulating film, the upper surface of described both positive and negative polarity layer is equipped with the between every adjacent two layers between exchange articulamentum
One insulating coating, the lower surface of described exchange articulamentum is equipped with the second insulating coating, and described metal support interval sets
Put the lower section in described many stack bus bars, in wherein said metal support, there is cooling water channel, described insulation adnexa is located at institute
State the side of metal support and be connected with described many stack bus bars and described metal support, interior water cooling unit is used for described
Single-phase frequency-variable module is cooled down, and described DC filter capacitor group is connected with described direct current stack bus bar；
Filtering termination, described filtering termination is located at described 3rd within the chamber, described filtering termination respectively with institute
State electric machine assembly and described frequency-converting control device connects；And
Outer water cooling unit, described outer water cooling unit is located on described hull outside wall with to described frequency-converting control device and described filter
Ripple termination heat exchange.
2. explosion-proof variable frequency motor according to claim 1 is it is characterised in that described second chamber is located at described first chamber
Top, described 3rd chamber is located at one end of described first chamber and described second chamber.
3. explosion-proof variable frequency motor according to claim 2 it is characterised in that described second chamber and described first chamber it
Between by the connection of the gap that is formed on described first chamber roof.
4. explosion-proof variable frequency motor according to claim 3 is it is characterised in that described gap is rectangle or circular gap.
5. explosion-proof variable frequency motor according to claim 2 is it is characterised in that described first chamber is by being located in described housing
Cylindrical stator set limit.
6. explosion-proof variable frequency motor according to claim 5 is it is characterised in that described cylindrical stator set is soldered to described shell
Internal bottom.
7. explosion-proof variable frequency motor according to claim 5 is it is characterised in that described frequency-converting control device is supported on described circle
The top of tubular stator sleeve.
8. explosion-proof variable frequency motor according to claim 7 is it is characterised in that have on the roof of described cylindrical stator set
Upwardly extending support column, described frequency-converting control device is supported on the top of described cylindrical stator set by described support column.
9. explosion-proof variable frequency motor according to claim 1 is it is characterised in that described interior water cooling unit includes：
Water pump；
At least one cooling water channel, at least one cooling water channel described is located in described single-phase frequency-variable module, each described cooling
Water channel has water inlet and outlet；
Enter water separator, described enter water separator respectively with the water inlet of described water pump and at least one cooling water channel described even
Logical；
Go out water separator, described go out water separator respectively with the outlet of described water pump and at least one cooling water channel described even
Logical.
10. explosion-proof variable frequency motor according to claim 9 is it is characterised in that described interior water cooling unit also includes water water changes
Hot device, described water water- to-water heat exchanger be connected to described in go out between water separator and described water pump, wherein said outer water cooling unit passes through
Described water water- to-water heat exchanger is connected with described interior water cooling unit to realize heat exchange.
11. explosion-proof variable frequency motors according to claim 1 are it is characterised in that adjacent two described single-phase frequency-variable modules
Between be provided with multiple supporting parts.
12. explosion-proof variable frequency motors according to claim 1 are it is characterised in that described single-phase frequency-variable module includes three.
13. explosion-proof variable frequency motors according to claim 1 are it is characterised in that have at least one in described metal support
Cooling water channel described in bar.
14. explosion-proof variable frequency motors according to claim 13 it is characterised in that the water inlet of every described cooling water channel and
Outlet is respectively positioned on the same side of described metal support.
15. explosion-proof variable frequency motors according to claim 14 are it is characterised in that every described cooling water channel is all formed as U
Shape water channel.
16. explosion-proof variable frequency motors according to claim 1 it is characterised in that described exchange articulamentum neighbouring described absolutely
One end of edge adnexa has multiple first connection terminals spaced apart, and described first connection terminal is with described insulation adnexa even
Connect.
17. explosion-proof variable frequency motors according to claim 16 are it is characterised in that described first connection terminal includes：
Flat part, described flat part extends and with described to exchange articulamentum in the same plane from described exchange articulamentum；
And
The bending part connected vertically with described flat part, described bending part is connected with described insulation adnexa.
18. explosion-proof variable frequency motors according to claim 17 are it is characterised in that described bending part is led to described insulation adnexa
Cross bolt connection.
19. explosion-proof variable frequency motors according to claim 1 are it is characterised in that the neighbouring described direct current lamination of described zero layer
One end of busbar is configured with the second connection terminal, and one end of the neighbouring described direct current stack bus bar of described both positive and negative polarity layer is configured with two
Individual 3rd connection terminal spaced apart, described second connection terminal and described 3rd connection terminal respectively with described direct current lamination
Busbar connects.
20. explosion-proof variable frequency motors according to claim 1 are it is characterised in that described many stack bus bars further include：
Insulation strip, each layer in wherein said both positive and negative polarity layer, interconnection layer and exchange articulamentum is equipped with described insulation strip；With
And
Conductive pole, all rivetings on each layer in wherein said both positive and negative polarity layer, interconnection layer, zero layer and exchange articulamentum have multiple institutes
State conductive pole, the plurality of conductive pole on wherein every layer passes through insulating washer electrical isolation with other layers.
21. explosion-proof variable frequency motors according to claim 1 are it is characterised in that the described both positive and negative polarity of described many stack bus bars
The copper plate for 1.5mm-2.5mm folds and forms by thickness for layer, interconnection layer, zero layer and exchange articulamentum.
22. explosion-proof variable frequency motors according to claim 1 are it is characterised in that the described both positive and negative polarity of described many stack bus bars
Layer, the surface of interconnection layer, zero layer and exchange articulamentum all carry out tin plating process, and thickness of coating is more than 5 μm.
23. explosion-proof variable frequency motors according to claim 1 are it is characterised in that described first insulating coating and described the
Two insulating coating neighborings are processed along using pressing edge sealing process so that the first insulating coating and the second insulating coating it
Between formed total enclosing structure.
24. explosion-proof variable frequency motors according to claim 1 are it is characterised in that the upper surface of described metal support is coarse
The span of degree maximum is 1.6 μm -3.2 μm, and planarity requirements are less than 0.1mm/m.
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| CN201410060336.7A CN103872832B (en) | 2014-02-21 | 2014-02-21 | Anti-explosion variable frequency motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410060336.7A CN103872832B (en) | 2014-02-21 | 2014-02-21 | Anti-explosion variable frequency motor |
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| CN103872832B true CN103872832B (en) | 2017-02-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103887929B (en) * | 2014-04-21 | 2016-08-24 | 上海创力普昱自动化工程有限公司 | A kind of flame-proof converter all-in-one |
| CN106196801A (en) * | 2016-09-27 | 2016-12-07 | 西安科技大学 | Colliery downhole equipment radiating and cooling device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107713A (en) * | 2013-01-29 | 2013-05-15 | 上海电气集团股份有限公司 | Laminated busbar used for diode clamp type three-level converter |
| CN203219128U (en) * | 2013-03-29 | 2013-09-25 | 青岛天信变频电机有限公司 | 3300V mining, flame-proof and intrinsic-safety-type frequency-conversion speed-regulation all-in-one machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003164112A (en) * | 2001-11-20 | 2003-06-06 | Mitsubishi Electric Corp | Motor equipped with inverter |
| CN202145621U (en) * | 2011-07-13 | 2012-02-15 | 上海申地自动化科技有限公司 | Common DC bus type combined explosion-proof frequency converter |
| CN102307000A (en) * | 2011-09-14 | 2012-01-04 | 江苏聚友电气有限公司 | Mining high-voltage frequency converter with explosion-proof type |
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2014
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107713A (en) * | 2013-01-29 | 2013-05-15 | 上海电气集团股份有限公司 | Laminated busbar used for diode clamp type three-level converter |
| CN203219128U (en) * | 2013-03-29 | 2013-09-25 | 青岛天信变频电机有限公司 | 3300V mining, flame-proof and intrinsic-safety-type frequency-conversion speed-regulation all-in-one machine |
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