CN208082712U - A kind of centrifugal ore separator that permanent magnet synchronous motor directly drives - Google Patents
A kind of centrifugal ore separator that permanent magnet synchronous motor directly drives Download PDFInfo
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- CN208082712U CN208082712U CN201820163442.1U CN201820163442U CN208082712U CN 208082712 U CN208082712 U CN 208082712U CN 201820163442 U CN201820163442 U CN 201820163442U CN 208082712 U CN208082712 U CN 208082712U
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- permanent magnet
- synchronous motor
- magnet synchronous
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- rotary shaft
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Abstract
The utility model discloses a kind of centrifugal ore separator that permanent magnet synchronous motor directly drives, including casing, feed port, housing, inner sleeve, tailing discharge gate, rotating mechanism, the inner sleeve is coaxial with housing and axis is equipped with a rotary shaft, the rotating mechanism is connect with the rotary shaft drives the inner sleeve, housing to rotate about the axis, and the rotating mechanism is permanent magnet synchronous motor；The permanent magnet synchronous motor includes rotor assembly and stator module, the permanent magnet that the rotor assembly includes mover and is evenly arranged in around the axis on mover, and the mover is set in the rotary shaft；The stator module is oppositely arranged with the rotor assembly, and the stator module includes stator core and the stator winding that is wrapped on the stator core, the circular column or annular disk that the stator core is integrally formed.The utility model centrifugal ore separator directly drives drum rotating in ore separators by permanent magnet synchronous motor, to achieve the purpose that transmission efficiency, low noise, torque are big, accurately control.
Description
Technical field
The utility model, which belongs to, is related to centrifugal separation technology field, particularly relates to a kind of centrifugation that permanent magnet synchronous motor directly drives
Ore separators.
Background technology
Centrifugation is follow-on gravity concentration techniques, due to rotary motion can generate it is bigger than terrestrial gravitation acceleration
Tens, hundreds of even thousands of up to ten thousand times of centrifugal accelerations, therefore there is common weight using the centrifugal separation technology of rotary motion
The incomparable superior function of power ore dressing has separative efficiency high, and treating capacity is big, and the rate of recovery is high, adaptable to wait many merits
And benefit.Using the centrifugal separation equipment of rotary motion -- centrifugal ore separator, according to it is vertical/horizontal, have back-flushing/non-recoil
The features such as water, intermittent discharge/continuous pulp discharge, several classes can be divided into.
But because centrifugal ore separator is often constructed under complicated, severe working environment, so can for its transmission system
It is subjected to heavy load and large impact, and requires have the functions such as high-power, low-speed big output.Wherein, rotation bucket is centrifugation
The core component of ore separators, the combination for adding transmission mechanism using driving power source main at present.The transmission mechanism belongs to
Intermediate equipment, reduction box, belt pulley etc. increase friction pair in work, and transmission efficiency is low, noise is big.
Power source is driven mainly to use the type of drive or variable-frequency electric of double-speed motor main driving and hydraulic motor Assisted Combinatorial
Machine type of drive, the main driving of the double-speed motor and the type of drive of hydraulic motor Assisted Combinatorial have the disadvantage that：1, cannot
Continuous speed adjustment；2, complicated, geological adaptability is poor；3, transmission efficiency is low, and high failure rate influences ore dressing speed；4, hydraulic motor
The problems such as cannot being driven simultaneously with motor；5, response speed is slow, high energy consumption.
In addition, existing centrifugal ore separator water consumption in ore dressing process is very big, it usually needs be equipped with backwashing water and
Motor cooling water, not environmentally, mechanical stability is poor, affects processing capacity and the life of unit occupied area to a certain extent
Produce efficiency.
Invention content
The purpose of this utility model be in view of the problems of the existing technology, provide that a kind of permanent magnet synchronous motor directly drives from
Heart ore separators, the centrifugal ore separator directly drive rotary drum in ore separators (including inner sleeve, housing) by permanent magnet synchronous motor and revolve
Turn, to achieve the purpose that transmission efficiency, low noise, torque are big, accurately control.
To achieve the above object, the technical solution adopted in the utility model is：
A kind of centrifugal ore separator that permanent magnet synchronous motor directly drives, including casing, feed port, housing, inner sleeve, tailing discharge
Mouth, rotating mechanism, the inner sleeve is coaxial with housing and axis is equipped with a rotary shaft, and the rotating mechanism connects with the rotary shaft
Tape splicing moves the inner sleeve, housing rotates about the axis；The rotating mechanism is permanent magnet synchronous motor；The permanent magnet synchronous motor includes
Rotor assembly and stator module, the permanent magnetism that the rotor assembly includes mover and is evenly arranged in around the axis on mover
Body, the mover are set in the rotary shaft；The stator module is oppositely arranged with the rotor assembly, the stator module
The stator winding for including stator core and being wrapped on the stator core, the circular column that the stator core is integrally formed
Or annular disk.After permanent magnet synchronous motor is powered, the magnetic force rotated around axis direction is will produce, for driving rotor assembly to revolve
Turn, to drive ore separators housing, inner sleeve rotation, carries out separation ore-sorting work.In addition, stator core is made of one molding ring
Shape column or annular disk so that equipment is easy for installation, further decreases equipment assembly difficulty.
The rotary shaft can be arranged at the top or bottom of casing, it is preferable that the rotary shaft is arranged in the machine
Shell bottom is simultaneously connected across the housing with the inner sleeve bottom centre, is located in the rotary shaft below casing and is arranged with bearing
And supporting block, the permanent magnet synchronous motor are set in the lower section for being located at the supporting block in the rotary shaft.
Further, the stator module further includes having stator base；The stator core is fixedly installed in the stator
On pedestal；The permanent magnet is distributed in lateral wall and/or the end face of the mover；The stator core is placed in the stator base
Madial wall and/or end face, be oppositely arranged with the permanent magnet.By the cooperation of stator winding and permanent magnet, in the rotation diameter of axle
To and/or axial provide turning moment, driving rotary shaft rotation, to drive centrifugal ore separator to work to the rotary shaft.
Further, the madial wall in the mover and/or end face is arranged in the permanent magnet, opposite with the stator core
Setting.
Further, the rotary shaft is the hollow posts of both ends open, and the lower section for being located at the permanent magnet synchronous motor rotates
Shaft end is connected with recoil water pipe.
Further, the stator module is arranged on a stator supporter, and the recoil water pipe includes water inlet pipe, water outlet
Pipe, the water inlet pipe, outlet pipe are each passed through the center of the stator module and are intersected in the rotation the tip of the axis, the rotation
Shaft, water inlet pipe are respectively equipped with solenoid valve on outlet pipe.Permanent magnet synchronous motor can supervene a large amount of heat at work,
To ensure the normal operation of equipment, quickly heat can be taken away using the water of recoil water pipe, improve equipment operation stability
Meanwhile the utilization rate of energy is improved, simplify device structure, reduce motor assembly difficulty, save water resource, realizes that resource maximizes
It utilizes.
Further, the rotary shaft is located at below the permanent magnet synchronous motor and is equipped with rotary fan, the rotation fan
Leaf is externally provided with the protective cover with through-hole.Motor drives rotary fan rotation, to motor while driving rotary shaft rotation
It radiates, improves the stability of equipment, reduce energy consumption, reduce the power source of existing radiator and each intermediate member, structure
Simply, transmission efficiency higher.
Further, the stator base is circular column or annular capping structure, is evenly equipped on the stator base wall surface
Multiple through-holes, the through-hole are equipped with waterproof ventilated membrane.When mover rotates, using through-hole rough air, accelerate gas flowing,
Make motor radiating, it is ensured that equipment normal operation.
Further, the mover is annular capping structure, and multiple through-holes are evenly equipped on the mover side wall.Effect is same
On.
Further, pass through key connection between the rotary shaft and the mover.Centrifugal ore separator needs in operation
Very huge driving torque is undertaken, on the one hand can enhance the torque-transfer capability of the rotary shaft by being keyed, protect
The reliability that torque transmits is demonstrate,proved, on the other hand can facilitate the location and installation of the mover, and keyway is easy to process, transmits torque
Reliable and stable, the relevant technologies and specification are ripe.
Compared with prior art, the utility model has the beneficial effects that：1, centrifugation is directly driven using permanent magnet synchronous motor
Ore separators, it is possible to reduce existing equipment gear, reduction box etc. drive intermediate link, simplify type of drive and structure, improve driving
Efficiency realizes the quick response of centrifugal ore separator；2, the utility model centrifugal ore separator can select the driving of motor as needed
Mode realizes frequency control or SERVO CONTROL, to meet the flexible selection to type of drive；3, the utility model centrifugal ore separator
By electromagnetism power drive, contactless transmission is reliable for operation, and noise is small, and simple in structure, manufacturing cost and use cost is low, the damage of the energy
Consumption greatly reduces；4, the utility model centrifugal ore separator has fast response time, control accuracy high using permanent magnet synchronous motor
Advantage, while powerful energy output can be provided；5, the utility model stator core is made of one molding circular column or ring
Shape disk so that equipment is easy for installation, further decreases equipment assembly difficulty；6, the utility model centrifugal ore separator makes full use of instead
Flushing water radiates to motor, simplifies device structure, reduces motor assembly difficulty, saves water resource, improves resource utilization,
Realize that resource maximally utilizes.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram for the centrifugal ore separator that permanent magnet synchronous motor directly drives of the utility model；
Fig. 2 is a kind of partial structurtes enlarged diagram for the centrifugal ore separator that permanent magnet synchronous motor directly drives of the utility model；
Fig. 3 is a kind of structural schematic diagram of the utility model stator core；
Fig. 4 is the structural schematic diagram for the centrifugal ore separator that the utility model another kind permanent magnet synchronous motor directly drives；
Fig. 5 is another structural schematic diagram of the utility model stator core；
Fig. 6 is the partial structurtes amplification signal for the centrifugal ore separator that the utility model another kind permanent magnet synchronous motor directly drives
Figure；
Fig. 7 is the structural schematic diagram for the centrifugal ore separator that the utility model another kind permanent magnet synchronous motor directly drives；
In figure：1. casing；2. housing；3. inner sleeve；4. feed port；5. tailing discharge gate；6. rotary shaft；7. bearing；9.
Bracer；10. rotating mechanism；11. rotor assembly；11-1. movers；11-2. permanent magnets；12. stator module；12-1. stator cores；
12-2. stator bases；13. recoil water pipe；13-1. water inlet pipes；13-2. outlet pipes；14. rotary fan；15. protective cover；16. subtracting
Shake device.
Specific implementation mode
Below in conjunction with the attached drawing in the utility model, the technical solution of the utility model is clearly and completely retouched
It states, it is clear that the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Based on this
Embodiment in utility model, those of ordinary skill in the art obtained under the conditions of not making creative work it is all its
Its embodiment, shall fall within the protection scope of the present invention.
As shown, a kind of centrifugal ore separator that permanent magnet synchronous motor directly drives, including it is casing 1, feed port 4, housing 2, interior
Set 3, tailing discharge gate 5, rotating mechanism 10, the inner sleeve 3 is coaxial with housing 2 and axis is equipped with a rotary shaft 6, the rotation
Mechanism 10 is connect with the rotary shaft 6 drives the inner sleeve, housing to rotate about the axis, and the rotating mechanism 10 is permanent magnet synchronous electric
Machine.The wherein described rotary shaft can be arranged at the top or bottom of casing.The centrifugal ore separator can be horizontal centrifugal choosing
Mine machine can also be vertical centrifugal ore selector.
The permanent magnet synchronous motor includes rotor assembly 11 and stator module 12, and the rotor assembly 11 includes mover 11-1
And it is set in institute around the axis permanent magnet 11-2, the mover 11-1 evenly distributed in the circumferential direction on mover 11-1
It states in rotary shaft；The stator module 12 is oppositely arranged with the rotor assembly 11, and the stator module 12 includes stator iron
Core 12-1 and the stator winding being wrapped on the stator core 12-1.Wherein, the stator core 12-1 is integrally formed
Circular column or annular disk.
Preferably, pass through key connection between the rotary shaft 6 and the mover 11-1.
According to Commercial cultivation, selecting use scope, broadly vertical centrifugal ore selector is specifically implemented as the utility model
Mode, the rotary shaft 6 are arranged in 1 bottom of the casing and are connected with 3 bottom centre of the inner sleeve across the housing 2, institute
It states in rotary shaft 6 to be located at below casing 1 and is arranged with bearing 7 and supporting block 9, the permanent magnet synchronous motor is set in the rotary shaft
It is located at the lower section of the supporting block 9 on 6.Damping device 16 is equipped between the casing 1 and rack.
It is specifically described the arrangement of stator module 12 and rotor assembly 11 below, following several arrangements can be used in when use
The permanent magnet synchronous motor of mode directly drives centrifugal ore separator.
Embodiment one
As shown in Figs. 1-3, the stator module 12 further includes having stator base 12-2；The stator core 12-1 fixes peace
Loaded on the stator base 12-2, the stator base 12-2 is mounted in the supporting block 9；The mover 11-1 is in a ring
Rod structure；The permanent magnet 11-2 is distributed in the lateral wall of the mover 11-1；Stator base 12-2 rod structures in a ring
And it is set in outside the rotor assembly 11；The stator core 12-1 is placed in the madial wall of the stator base 12-2, described fixed
The circular column that sub- iron core 12-1 is integrally formed is oppositely arranged with the permanent magnet 11-2.On the stator base 12-2 wall surfaces
Multiple through-holes are evenly equipped with, the through-hole is equipped with waterproof ventilated membrane (not shown).
After energization, the mover 11-1 provides the magnetic field radially rotated for the stator core 12-1, promotes institute
It is that the rotary shaft 6 provides the torque rotated around 6 axial line of the rotary shaft to state stator module 12 and rotor assembly 11, is directly driven
Dynamic centrifugal ore separator carries out ore dressing work.
Embodiment two
As illustrated in figures 4-5, the stator module 12 further includes having stator base 12-2；The stator core 12-1 fixes peace
Loaded on the stator base 12-2, the stator base 12-2 is mounted in the supporting block 9；The mover 11-1 is in a ring
Dish structure；The permanent magnet 11-2 is distributed in the top surface of the mover 11-1；The stator base 12-2 is set in the rotor
11 top of component；Dish structure is placed in the bottom surface of the stator base 12-2 to the stator core 12-1 in a ring, with it is described forever
Magnet 11-2 is oppositely arranged.It is located at the rotary shaft 6 below the permanent magnet synchronous motor and is equipped with rotary fan 14, the rotation
Flabellum 14 is externally provided with the protective cover 15 with through-hole.
After energization, the mover 11-1 provides the magnetic field that an axis rotates up for the stator core 12-1, promotes institute
It is that the rotary shaft 6 provides the torque rotated around 6 axial line of the rotary shaft to state stator module 12 and rotor assembly 11, is directly driven
Dynamic centrifugal ore separator carries out ore dressing work.
Embodiment three
As shown in fig. 6, the stator module 12 further includes having stator base 12-2；The stator core 12-1 is fixedly mounted
In on the stator base 12-2, the stator base 12-2 is mounted in the supporting block 9；Mover 11-1 columns in a ring
Structure；The permanent magnet 11-2 is distributed in lateral wall and the top surface of the mover 11-1；The stator base 12-2 is covered in a ring
Cap structure is simultaneously set in outside the rotor assembly 11；The stator core 12-1 is respectively placed in the inside of the stator base 12-2
Wall (stator core 12-1 herein is annular rod structure) and bottom surface (stator core 12-1 herein is annular dish structure), with institute
Permanent magnet 11-2 is stated to be oppositely arranged.
After energization, the mover 11-1 provides the magnetic field of a radial and axial upper rotation for the stator core 12-1,
It is that the rotary shaft 6 provides the torque rotated around 6 axial line of the rotary shaft to promote the stator module 12 and rotor assembly 11,
It directly drives centrifugal ore separator and carries out ore dressing work.
Example IV
As shown in fig. 7, the rotor assembly 11 is annular capping structure, the rotor assembly 11 is arranged in the stator pack
The madial wall in the mover 11-1 is arranged in 12 outside of part, the permanent magnet 11-2, and the stator core 12-1 is arranged certain
On the top surface of sub- bearing, it is oppositely arranged with the permanent magnet 11-2.The rotary shaft 6 is the hollow posts of both ends open, is located at institute
6 end of lower section rotary shaft of permanent magnet synchronous motor is stated with recoil water pipe 13 to be connected, the recoil water pipe 13 including water inlet pipe 13-1,
Outlet pipe 13-2, the water inlet pipe 13-1, outlet pipe 13-2 are each passed through the center of the stator module 12 and are intersected in described
The rotary shaft 6, water inlet pipe 13-1, the end of rotary shaft 6 is respectively equipped with solenoid valve on outlet pipe 13-2.The stator core
12-1 is annular rod structure.
When detaching tailing, the solenoid valve in rotary shaft 6 is closed, opens the electromagnetism on water inlet pipe 13-1, outlet pipe 13-2
Valve carries out cooling and heat dissipation using backwashing water to permanent magnet synchronous motor；Tailing separation finishes, and when needing to rinse collection concentrate, closes
The solenoid valve on outlet pipe 13-2 is closed, the solenoid valve opened in rotary shaft 6 is rinsed 3 inner wall of inner sleeve；It is then switched off rotation
Solenoid valve on axis 6 opens the solenoid valve on outlet pipe 13-2, until concentrate collection finishes, closes water inlet pipe 13-1, powers off,
Close centrifugal ore separator.
Embodiment five
The rotor assembly 11 is annular dish structure, and the setting of the rotor assembly 11 is in 12 outside of the stator module, institute
It states permanent magnet 11-2 to be arranged in the bottom surface of the mover 11-1, the stator core 12-1 is arranged in the top surface of a stator supporter
On, it is oppositely arranged with the permanent magnet 11-2.The rotary shaft 6 is the hollow posts of both ends open, is located at the permanent magnet synchronous electric
6 end of lower section rotary shaft of machine is connected with recoil water pipe 13, and the recoil water pipe 13 includes water inlet pipe 13-1, outlet pipe 13-2,
The water inlet pipe 13-1, outlet pipe 13-2 are each passed through the center of the stator module 12 and are intersected in the end of the rotary shaft 6
The rotary shaft 6, water inlet pipe 13-1, end is respectively equipped with solenoid valve on outlet pipe 13-2.The stator core 12-1 is annular disk
Structure.The course of work is identical as example IV.
Embodiment six
The rotor assembly 11 is annular capping structure, and the rotor assembly 11 is arranged in 12 outside of the stator module,
Madial wall and bottom surface in the mover 11-1 is arranged in the permanent magnet 11-2, and the stator core 12-1 is arranged in a stator branch
(stator core 12-1 herein is annular disk knot for the side wall (stator core 12-1 herein is annular rod structure) of seat and top surface
Structure) on, it is oppositely arranged with the permanent magnet 11-2.The rotary shaft 6 is the hollow posts of both ends open, is located at the permanent-magnet synchronous
6 end of lower section rotary shaft of motor is connected with recoil water pipe 13, and the recoil water pipe 13 includes water inlet pipe 13-1, outlet pipe 13-
2, the water inlet pipe 13-1, outlet pipe 13-2 are each passed through the center of the stator module 12 and are intersected in the rotary shaft 6
The rotary shaft 6, water inlet pipe 13-1, end is respectively equipped with solenoid valve on outlet pipe 13-2.The course of work and example IV phase
Together.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (10)
1. a kind of centrifugal ore separator that permanent magnet synchronous motor directly drives, which is characterized in that including casing, feed port, housing, inner sleeve,
Tailing discharge gate, rotating mechanism, the inner sleeve is coaxial with housing and axis is equipped with a rotary shaft, the rotating mechanism with it is described
Rotary shaft connection drives the inner sleeve, housing to rotate about the axis, and the rotating mechanism is permanent magnet synchronous motor；The permanent-magnet synchronous
Motor includes rotor assembly and stator module, and the rotor assembly includes mover and is evenly arranged on mover around the axis
Permanent magnet, the mover is set in the rotary shaft；The stator module is oppositely arranged with the rotor assembly, described fixed
Sub-component includes stator core and the stator winding that is wrapped on the stator core, what the stator core was integrally formed
Circular column or annular disk.
2. the centrifugal ore separator that a kind of permanent magnet synchronous motor according to claim 1 directly drives, which is characterized in that the rotation
Axis is arranged in the bottom of shell and is connected with the inner sleeve bottom centre across the housing, and casing is located in the rotary shaft
Lower section is arranged with bearing and supporting block, and the permanent magnet synchronous motor, which is set in the rotary shaft, to be located under the supporting block
Side.
3. the centrifugal ore separator that a kind of permanent magnet synchronous motor according to claim 1 directly drives, which is characterized in that the stator
Component further includes having stator base；The stator core is fixedly installed in the stator base；The permanent magnet is distributed in institute
State lateral wall and/or the end face of mover；The stator core is placed in madial wall and/or the end face of the stator base, and described
Permanent magnet is oppositely arranged.
4. the centrifugal ore separator that a kind of permanent magnet synchronous motor according to claim 1 directly drives, which is characterized in that the permanent magnetism
Madial wall and/or end face in the mover is arranged in body, is oppositely arranged with the stator core.
5. the centrifugal ore separator that a kind of permanent magnet synchronous motor according to claim 1 directly drives, which is characterized in that the rotation
Axis is the hollow posts of both ends open, and the lower section rotation shaft end for being located at the permanent magnet synchronous motor is connected with recoil water pipe.
6. the centrifugal ore separator that a kind of permanent magnet synchronous motor according to claim 5 directly drives, which is characterized in that the stator
Component is arranged on a stator supporter, and the recoil water pipe includes water inlet pipe, outlet pipe, and the water inlet pipe, outlet pipe are worn respectively
It crosses the center of the stator module and is intersected in the rotation the tip of the axis, the rotary shaft, water inlet pipe are set respectively on outlet pipe
There is solenoid valve.
7. the centrifugal ore separator that a kind of permanent magnet synchronous motor according to claim 1 directly drives, which is characterized in that the permanent magnetism
It is located at the rotary shaft below synchronous motor and is equipped with rotary fan, the rotary fan is externally provided with the protective cover with through-hole.
8. the centrifugal ore separator that a kind of permanent magnet synchronous motor according to claim 3 directly drives, which is characterized in that the stator
Pedestal is circular column or annular capping structure, is evenly equipped with multiple through-holes on the stator base wall surface, the through-hole is equipped with anti-
Water ventilated membrane.
9. the centrifugal ore separator that a kind of permanent magnet synchronous motor according to claim 4 directly drives, which is characterized in that the mover
For annular capping structure, multiple through-holes are evenly equipped on the mover side wall.
10. the centrifugal ore separator that a kind of permanent magnet synchronous motor according to claim 1 directly drives, which is characterized in that the rotation
Pass through key connection between shaft and the mover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820163442.1U CN208082712U (en) | 2018-01-31 | 2018-01-31 | A kind of centrifugal ore separator that permanent magnet synchronous motor directly drives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820163442.1U CN208082712U (en) | 2018-01-31 | 2018-01-31 | A kind of centrifugal ore separator that permanent magnet synchronous motor directly drives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208082712U true CN208082712U (en) | 2018-11-13 |
Family
ID=64066842
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820163442.1U Active CN208082712U (en) | 2018-01-31 | 2018-01-31 | A kind of centrifugal ore separator that permanent magnet synchronous motor directly drives |
Country Status (1)
| Country | Link |
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| CN (1) | CN208082712U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108283999A (en) * | 2018-01-31 | 2018-07-17 | 湖北环电磁装备工程技术有限公司 | A kind of centrifugal ore separator that permanent magnet synchronous motor directly drives |
-
2018
- 2018-01-31 CN CN201820163442.1U patent/CN208082712U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108283999A (en) * | 2018-01-31 | 2018-07-17 | 湖北环电磁装备工程技术有限公司 | A kind of centrifugal ore separator that permanent magnet synchronous motor directly drives |
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