CN108545085A - A kind of mining man device - Google Patents
A kind of mining man device Download PDFInfo
- Publication number
- CN108545085A CN108545085A CN201810354184.XA CN201810354184A CN108545085A CN 108545085 A CN108545085 A CN 108545085A CN 201810354184 A CN201810354184 A CN 201810354184A CN 108545085 A CN108545085 A CN 108545085A
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- Prior art keywords
- relay
- permanent magnet
- magnet synchronous
- synchronous motor
- connect
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B12/00—Component parts, details or accessories not provided for in groups B61B7/00 - B61B11/00
- B61B12/10—Cable traction drives
Abstract
The invention discloses a kind of mining man devices, including power-supply system, permanent magnet synchronous motor, girder, drive system and control system；Permanent magnet synchronous motor is arranged on girder, and the output shaft of permanent magnet synchronous motor and the driving wheel of drive system are coaxially connected；Power-supply system is connect with permanent magnet synchronous motor and control system, for providing electric energy to permanent magnet synchronous motor and control system；Control system is connected with permanent magnet synchronous motor.Mining man device disclosed by the invention substitutes original asynchronous machine and retarder pattern by permanent magnet synchronous motor, simple in structure and safe and efficient.
Description
Technical field
The present invention relates to mining equipment technical fields, more specifically, more particularly to a kind of mining man device.
Background technology
Mining man device (i.e. mining cableway) is the characteristics of combining China's coal-mine underworkings, is developed, exploitation adapts to me
The rope man-riding haulage system of state's coal mine feature seriation solves mine down-hole long range, big sag transports personnel issue, shortening duty
It in the work commuter time, reduces labor intensity, improves working efficiency, realize long-time continuative transport, become underground coal mine and transport people
The preferred unit of member.
Mining man device on mining cableway at present, common type of drive are that asynchronous machine is driven by gearbox
Driving wheel and hydraulic system drive the such two ways of driving wheel, the mining man dress of hydraulic system driving by hydraulic motor
It sets, works under this use environment rugged environment of mine, oil circuit and sealing system easily break down, once and hydraulic pressure
System breaks down, and cause investigation is difficult, and repair is complicated, and maintenance cost is high.
And motor-driven mining man device is used, the speed of service is single speed, and seating capacity is different, and asynchronous machine is born
Load rate is different, needs to generate exciting current from power grid absorbing reactive power, and to generate magnetic field, therefore power factor is low, load
Rate decline, when efficiency and power factor can all decline therewith.And retarder drives driving wheel to work for a long time, can often occur
The failures such as bearing damage, oil sealing oil leak, gear wear increase maintenance capacity.
The type of drive of the existing mining man device of above two, because of gearbox gear foot wheel abrasion or hydraulic system fault,
Mining cableway " driving " accident may be caused, seriously affect production efficiency and personnel safety.
Therefore, a kind of simple in structure and safe and efficient mining man device of design, is that those skilled in the art urgently solve
Certainly the problem of.
Invention content
The technical problem to be solved in the present invention is to provide a kind of mining man device, is substituted by permanent magnet synchronous motor original
Asynchronous machine and retarder pattern, it is simple in structure and safe and efficient.
A kind of mining man device, including power-supply system, permanent magnet synchronous motor, girder, drive system and control system；
The permanent magnet synchronous motor is arranged on the girder, and the output shaft of the permanent magnet synchronous motor and the driving
The driving wheel of system is coaxially connected；
The power-supply system is connect with the permanent magnet synchronous motor and the control system, is used for the permanent magnet synchronous electric
Machine and the control system provide electric energy；
The control system is connected with the permanent magnet synchronous motor.
Preferably, the power-supply system include sequentially connected disconnecting switch, input filter, vacuum A. C. contactor,
Frequency converter and output filter；
The frequency converter includes rectification module, inverter module.
Preferably, the power-supply system further includes input reactance device, output reactance device；
The input reactance device is arranged between the input filter and the vacuum A. C. contactor；
The output reactance device is arranged between the frequency converter and the output filter.
Preferably, the control system includes control transformer, PLC controller and the first relay, the second relay, the
Three relays, the 4th relay；
The frequency converter further includes rectification control panel and inversion control plate；
First relay, second relay, the third relay, the 4th relay respectively with it is described
First output point of PLC controller, the second output point, third output point, the connection of the 4th output point；
The first terminal of the rectification control panel is connect with the normally opened contact of first relay, the rectification control panel
Second terminal connect with the normally opened contact of the third relay；
The third terminal of the inversion control plate is connect with the normally opened contact of second relay, the rectification control panel
Forth terminal connect with the normally opened contact of the 4th relay.
Preferably, the frequency converter further includes output relay, the output relay and the 4th of the PLC controller
Input point connects；
First input point of the PLC controller is connect with start button, and the second input point is connect with stop button, third
Input point is connect with reset button.
Preferably, the control system further includes being arranged to control melting between transformer and the PLC controller described
Disconnected device.
Preferably, the control system further includes the switch electricity being arranged between the fuse and the PLC controller
Source.
Preferably, the rectification module and the inverter module are IGBT power module.
Preferably, further include the encoder being connect with the permanent magnet synchronous motor, the encoder for detect it is described forever
The position of magnetic-synchro rotor and rotating speed.
Preferably, further include the mechanical holdback being arranged at the top of the permanent magnet synchronous motor.
A kind of mining man device provided by the invention substitutes original asynchronous machine collocation by permanent magnet synchronous motor and subtracts
Fast device pattern so that mechanical wear is reduced, and without impact when startup, operation is more steady, simple in structure and safe and efficient.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of mining device for workers one of which embodiment in the embodiment of the present invention；
Fig. 2 is the building-block of logic of mining device for workers one of which embodiment in the embodiment of the present invention；
Fig. 3 is the circuit structure diagram of mining device for workers one of which embodiment in the embodiment of the present invention.
Specific implementation mode
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.
Based on the embodiment in the application, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present application.
As depicted in figs. 1 and 2, a kind of mining man device provided by the invention, including power-supply system 1, permanent magnet synchronous electric
Machine 2, girder 3, drive system 4 and control system 5；
Permanent magnet synchronous motor 2 is arranged on girder 3, and the driving wheel of the output shaft of permanent magnet synchronous motor 2 and drive system 4
It is coaxially connected；
Power-supply system 1 is connect with permanent magnet synchronous motor 2 and control system 5, is used for permanent magnet synchronous motor 2 and control system
5 provide electric energy；
Control system 5 is connected with permanent magnet synchronous motor 2.
Compared to the prior art, the present embodiment substitutes original asynchronous machine collocation retarder using permanent magnet synchronous motor 2
Pattern, in the state of no speed reducer so that mechanical wear is reduced, and service life increases, more steady, the vibration of system operation
Smaller, noise are lower.And since 2 controllability of permanent magnet synchronous motor is good, rotor is permanent magnet, is not necessarily to exciting current, does not have
Rotor copper loss, it is efficient.
In practice, drive system 4 can be made of various structures, and nuclear structure is the driving being arranged on cableway
Wheel, permanent magnet synchronous motor 2 provide electric energy by power-supply system 1, and electronics rotor drives coaxially connected driving wheel to rotate, and then band
Dynamic mining man device is moved along cableway.Due to being to use motor direct-drive steel wire rope, speed reducer or hydraulic pressure horse are saved
It reaches, so the pollution without lubricating fluid and hydraulic oil to environment.
And the main function of control system 5 is after receiving operational order, operational order to be sent to permanent magnet synchronous motor 2 and is held
The corresponding action of row, such as the action of the carrying out practically such as startup, pause, failure feedback, failure reset, i.e., control system 5 can be real
Existing a variety of motor operation modes can use continuous work, interval work, speed change work, positive and negative rotation work, fixed point fixed as needed
The various modes such as position, fast braking, soft soft stop, to meet the concrete operations demand under different operating environment.
When permanent magnet synchronous motor 2 runs well, due to having permanent magnet, such as Nd-Fe-B magnet steel on rotor, by permanent magnet
Magnetic field ensures that the normal operation of motor, therefore rotor cage item does not have electric current, does not also just have winding loss, corresponding to turn
Sub- iron loss does not have yet, therefore efficiency is compared with common electric machine higher.
Further, as shown in figure 3, power-supply system 1 include sequentially connected disconnecting switch QS1, it is input filter Z1, true
Empty A.C. contactor KM1, frequency converter B 1 and output filter Z2；
Frequency converter B 1 includes rectification module ZM1, inverter module NM1.
Power-supply system 1 provides AC power through disconnecting switch QS1, input filter Z1, vacuum A. C. contactor by user
After KM1, frequency converter B 1 is flowed into, is DC power supply AC power rectification, then again by the rectification module ZM1 of frequency converter B 1
It is reverse into after AC power from the leading-out terminal of frequency converter B 1 and is exported by inverter module NM1, by, output filter after output
Z2 is supplied to permanent magnet synchronous motor 2.
In practice, three phase mains input may be used, disconnecting switch QS1 is arranged in each phase, is dividing position
There are the insulation distance for meeting prescribed requirement and apparent disconnect to indicate when setting, between contact；When closing position, normal circuit can be carried
Under the conditions of electric current and the electric current under exceptional condition (such as short circuit) at the appointed time.Meanwhile after separating brake, it can establish reliable
Clearance for insulation, it would be desirable to the equipment or circuit of maintenance are separated with power supply with an apparent cut-off point, with ensure service personnel and
The safety of equipment.
Input filter Z1 and output filter Z2 may be used in hyperbaric environment more when input power is 1140V
Applicable passive filter, and in 660V, using active filter more applicable in a low pressure environment, can signal be existed
It is passed through before frequency converter B 1 and after the output of frequency converter B 1, useful signal is as zero-decrement as possible to be passed through, and to the greatest extent may be used to garbage signal
The big reflection of energy, improves signal transmission effect, such as filter out the interference of the types such as EMI.
The effect of vacuum A. C. contactor KM1 is the power supply of quick cut-out ac main circuit, realizes and open or stop mining
The work of device for workers can not only be switched on and off circuit, but also have low pressure release guard effect, it can be grasped at a distance
Make and controls corresponding electrical equipment, it also can remote display working condition.
Every one-phase circuit of vacuum A. C. contactor KM1 is also parallel with buffer resistance, the line of vacuum A. C. contactor KM1
Circle can generate induced electromotive force when passing through electric current at its both ends.When the current vanishes, induced electromotive force can be in circuit
Element generates backward voltage, when backward voltage is higher than the breakdown reverse voltage of element, can be damaged to element.Buffer resistance
Online both ends in parallel, when the coil blackout of vacuum A. C. contactor KM1, current vanishes therein, the induced electricity of coil generation
Kinetic potential is consumed by the circuit acting that this buffer resistance and coil are constituted, to protect the peace of other elements in circuit
Entirely.
Of course, it is possible to which the quantity per phase institute parallel resistance is arranged according to actual needs, it is not repeated herein.
Simultaneously as being controlled using frequency converter B 1, device without impact, realizes mining man device on startup
Soft start function, when mining man device is in the serious extra lower administrative staff of upper administrative staff, frequency converter B 1 drags permanent magnet synchronous electric
Motivation overcomes gravity to do manual work, and permasyn morot is in motoring condition；When mining man device is seriously extra in lower administrative staff
When upper administrative staff, inverter side generates exciting current, the power generation of gravity traction permasyn morot, and permasyn morot is in hair
Electricity condition, potential energy are that electric energy feeds back to power grid by rectification side.Not only efficiently solve mining man device in uplink or
Serious uneven and generation the car slipping of personnel assignment, acceleration " driving " accident when downlink, and the energy back that feedback is generated
To power grid, reach practical energy-saving effect.
Further, power-supply system 1 further includes input reactance device L1, output reactance device L2；
Input reactance device L1 is arranged between input filter Z1 and vacuum A. C. contactor KM1；
Output reactance device L2 is arranged between frequency converter B 1 and output filter Z2.
By installing input reactance device L1 and output reactance device L2, since reactor can reduce short circuit current and make short circuit
The voltage of moment system remains unchanged, and can limit circuit short circuit currents, protects power equipment not to be short-circuited electric current and is destroyed,
Improve the stability of mining man device operation.
Further, power-supply system 1 further includes the capacitive being connected in parallel between input filter Z1 and input reactance device L1
R1。
Capacitive R1 includes at least one capacitor, is used simultaneously with input reactance device L1 and output reactance device L2,
But respective purpose or effect are different, and capacitor keeps voltage advanced to boost；Reactor makes voltage delay to be depressured, with
Meet more usage scenarios.
In practice, input filter Z1, capacitive R1 and the L1 composition LCL filtering of input reactance device, main function
It is the higher hamonic wave for inhibiting frequency converter B 1 to be generated during commutation inversion, reduces the pollution caused by power grid.
Preferably, control system 5 includes control transformer T1, PLC controller P1 and the first relay KA1, the second relay
Device KA2, third relay KA3, the 4th relay KA4；
Frequency converter B 1 further includes rectification control panel ZK1 and inversion control plate NK1；
First relay KA1, the second relay KA2, third relay KA3, the 4th relay KA4 are controlled with PLC respectively
The first output point Q0.0 of device P1, the second output point Q0.1, third output point Q0.3, the 4th output point Q0.4 connections；
The first terminal ZS1 of rectification control panel ZK1 is connect with the normally opened contact of the first relay KA1, rectification control panel ZK1
Second terminal ZS2 connect with the normally opened contact of third relay KA3；
The third terminal ZS3 of inversion control plate NK1 is connect with the normally opened contact of the second relay KA2, rectification control panel ZK1
Forth terminal ZS4 connect with the normally opened contact of the 4th relay KA4.
The control mode of frequency converter B 1 is set as Terminal control pattern, and the first terminal ZS1 of rectification control panel ZK1 is connected to
The normally opened contact of one relay KA1, as rectification enabling signal；The Second terminal ZS2 of rectification control panel ZK1 be connected to third after
The normally opened contact of electric appliance KA3, as the failure reset signal on rectification control panel ZK1；The third terminal of inversion control plate NK1
ZS3 is connected to the normally opened contact of the second relay KA2, as inversion enabling signal；The forth terminal ZS4 of inversion control plate NK1
It is connected to the normally opened contact of the 4th relay KA4, as the failure reset signal on inversion plate.
Further, frequency converter B 1 further includes the 4th of output relay KA0, output relay KA0 and PLC controller P1
Input point I0.4 connections；
The first input point I0.1 of PLC controller P1 is connect with start button SB1, the second input point I0.2 and stop button
SB2 connections, third input point I0.3 are connect with reset button SB3.
The course of work of mining man device corresponding to above preferred embodiment is：
Start-up course sends the operational order of " start button SB1 is closed " on operation console, is given through the first input point I0.1
PLC controller P1 is exported to the first output point Q0.0, the first relay KA1 of triggering after PLC controller P1 processing operations and is obtained
Electricity, the normally opened contact of the first relay KA1 are closed, to control the rectification control panel ZK1 first terminals ZS1 of frequency converter B 1 with
COM is connected, and the rectification module ZM1 of frequency converter B 1 brings into operation, and after being delayed 3 seconds, the second output point Q0.1 of PLC controller P1 is touched
Generate the second relay KA2 obtain it is electric, by the second relay KA2 normally opened contact be closed, to control the inversion control of frequency converter B 1
Plate NK1 first terminals ZS1 and COM is connected, and the inverter module NM1 of frequency converter B 1 brings into operation, the leading-out terminal U of frequency converter B 1,
V, W output voltages, 2 work once electrified of permanent magnet synchronous motor.
Stopped process sends the operational order of " stop button SB2 is closed " on operation console, is given through the first input point I0.1
PLC controller P1 is exported to the first output point Q0.0, the first relay of triggering KA11 after PLC controller P1 processing operations and is lost
Electricity, the rectification control panel ZK1 first terminals ZS1 and COM of frequency converter B 1 are disconnected, and the rectification module ZM1 of frequency converter B 1 is out of service,
After delay 1 second, the second output point Q0.1 of PLC controller P1 triggers the second relay KA2 dead electricity, the inversion control of frequency converter B 1
Plate NK1 first terminals ZS1 and COM is disconnected, and the inverter module NM1 of frequency converter B 1 is out of service, and permanent magnet synchronous motor 2 stops work
Make.
Failure feedback procedure, when the event such as overcurrent, overload, under-voltage occurs in frequency converter B 1 rectification module ZM1 and inverter module NM1
When barrier, the output relay KA0 of frequency converter B 1 obtains electric, the 4th input point I0.4 connections of triggering PLC controller P1, to control
Mining man device it is out of service.
Malfunction reset process, when the event such as overcurrent, overload, under-voltage occurs in frequency converter B 1 rectification module ZM1 and inverter module NM1
The operational order that " reset button SB3 is closed " when barrier, is sent on operation console gives PLC controller P1, inside PLC controller P1
The second output point Q0.1 triggerings third relay KA3 obtains electric (being powered off after delay 1S) after processing operation, by third relay KA3's
Normally opened contact is closed, the rectification control panel ZK1 Second terminals ZS2 and COM and inversion control plate NK1 forth terminals of frequency converter B 1
ZS4 is also turned on COM, and the fault alarm that frequency converter B 1 is shown at this time has been eliminated.
Preferably, when being more than specified value in order to avoid electric current, circuit or element are damaged, control system 5 further includes
Fuse FU1 between controlling transformer T1 and PLC controller P1 is set.
Preferably, in order to maintain to stabilize the output voltage, control system 5 further includes being arranged in fuse FU1 and PLC controller
Switching Power Supply S1 between P1, the time ratio turned on and off for controlling each switch or button.
Preferably, rectification module ZM1 and inverter module NM1 is IGBT power module.
Since frequency converter B 1 uses four quadrant running mode, and rectification and inversion are all made of IGBT power module, Ke Yishi
The two-way flow of existing energy.
Preferably, further include the encoder being connect with permanent magnet synchronous motor 2, encoder is for detecting permanent magnet synchronous motor 2
The position of rotor and rotating speed, Real-time Feedback carry out PID control to frequency converter B 1.
Preferably, it is inverted under abnormal condition in order to prevent and causes safety accident, further include being arranged in permanent magnet synchronous electric
The mechanical holdback at 2 top of machine.In something unexpected happened, mechanical holdback can be the case where not needing electric power support
Under, it realizes the control to driving wheel, stops the rotation of driving wheel, so that mining man device can be with emergency braking.
A kind of mining man device provided in an embodiment of the present invention, original asynchronous machine is substituted by permanent magnet synchronous motor
It arranges in pairs or groups retarder pattern so that mechanical wear is reduced, and without impact when startup, operation is more steady, simple in structure and safe and efficient.
A kind of mining man device provided by the present invention is described in detail above.It is used herein specifically a
Principle and implementation of the present invention are described for example, and the explanation of above example is only intended to help to understand the present invention's
Method and its core concept.It should be pointed out that for those skilled in the art, not departing from the principle of the invention
Under the premise of, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the claims in the present invention
Protection domain in.
Claims (10)
1. a kind of mining man device, which is characterized in that including power-supply system, permanent magnet synchronous motor, girder, drive system and control
System processed；
The permanent magnet synchronous motor is arranged on the girder, and the output shaft of the permanent magnet synchronous motor and the drive system
Driving wheel it is coaxially connected；
The power-supply system is connect with the permanent magnet synchronous motor and the control system, for the permanent magnet synchronous motor and
The control system provides electric energy；
The control system is connected with the permanent magnet synchronous motor.
2. mining man device according to claim 1, which is characterized in that the power-supply system include it is sequentially connected every
Leave pass, input filter, vacuum A. C. contactor, frequency converter and output filter；
The frequency converter includes rectification module, inverter module.
3. mining man device according to claim 2, which is characterized in that the power-supply system further includes input reactance
Device, output reactance device；
The input reactance device is arranged between the input filter and the vacuum A. C. contactor；
The output reactance device is arranged between the frequency converter and the output filter.
4. mining man device according to claim 2, which is characterized in that the control system include control transformer,
PLC controller and the first relay, the second relay, third relay, the 4th relay；
The frequency converter further includes rectification control panel and inversion control plate；
First relay, second relay, the third relay, the 4th relay respectively with the PLC
First output point of controller, the second output point, third output point, the connection of the 4th output point；
The first terminal of the rectification control panel is connect with the normally opened contact of first relay, and the of the rectification control panel
Two-terminal is connect with the normally opened contact of the third relay；
The third terminal of the inversion control plate is connect with the normally opened contact of second relay, and the of the rectification control panel
Four terminals are connect with the normally opened contact of the 4th relay.
5. mining man device according to claim 4, which is characterized in that the frequency converter further includes output relay,
The output relay is connect with the 4th input point of the PLC controller；
First input point of the PLC controller is connect with start button, and the second input point is connect with stop button, third input
Point is connect with reset button.
6. mining man device according to claim 4, which is characterized in that the control system further includes being arranged described
Control the fuse between transformer and the PLC controller.
7. mining man device according to claim 6, which is characterized in that the control system further includes being arranged described
Switching Power Supply between fuse and the PLC controller.
8. mining man device according to claim 2, which is characterized in that the rectification module and the inverter module are equal
For IGBT power module.
9. mining man device according to claim 1, which is characterized in that further include being connect with the permanent magnet synchronous motor
Encoder, the encoder is used to detect position and the rotating speed of the permanent-magnetic synchronous motor rotor.
10. mining man device according to claim 1, which is characterized in that further include being arranged in the permanent magnet synchronous electric
Mechanical holdback at the top of machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810354184.XA CN108545085A (en) | 2018-04-19 | 2018-04-19 | A kind of mining man device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810354184.XA CN108545085A (en) | 2018-04-19 | 2018-04-19 | A kind of mining man device |
Publications (1)
| Publication Number | Publication Date |
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| CN108545085A true CN108545085A (en) | 2018-09-18 |
Family
ID=63515600
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| CN201810354184.XA Pending CN108545085A (en) | 2018-04-19 | 2018-04-19 | A kind of mining man device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4025736A1 (en) * | 1990-08-14 | 1992-02-20 | Magnet Motor Gmbh | CABLE CAR DRIVE |
| CN1292597A (en) * | 1999-10-11 | 2001-04-25 | 创新专利有限公司 | Electric machinery |
| JP2011201427A (en) * | 2010-03-25 | 2011-10-13 | Nippon Cable Co Ltd | Motor of cableway |
| AU2011281348A1 (en) * | 2010-07-22 | 2013-02-07 | Artificial Lift Company Limited | Method and apparatus for control of a synchronous permanent magnet motor, particularly over a long cable in a well |
| CN203032674U (en) * | 2012-03-16 | 2013-07-03 | 山西恒诚机电设备有限责任公司 | Intelligent permanent magnetic direct drive aerial man-carrying device |
| CN104967390A (en) * | 2015-05-29 | 2015-10-07 | 山西际安电气有限公司 | Mining frequency converter peripheral control system |
| CN206517333U (en) * | 2017-01-23 | 2017-09-22 | 东莞市恒迅微型电机有限公司 | A kind of variable-frequency motor automatic speed governing device |
-
2018
- 2018-04-19 CN CN201810354184.XA patent/CN108545085A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4025736A1 (en) * | 1990-08-14 | 1992-02-20 | Magnet Motor Gmbh | CABLE CAR DRIVE |
| CN1292597A (en) * | 1999-10-11 | 2001-04-25 | 创新专利有限公司 | Electric machinery |
| JP2011201427A (en) * | 2010-03-25 | 2011-10-13 | Nippon Cable Co Ltd | Motor of cableway |
| AU2011281348A1 (en) * | 2010-07-22 | 2013-02-07 | Artificial Lift Company Limited | Method and apparatus for control of a synchronous permanent magnet motor, particularly over a long cable in a well |
| CN203032674U (en) * | 2012-03-16 | 2013-07-03 | 山西恒诚机电设备有限责任公司 | Intelligent permanent magnetic direct drive aerial man-carrying device |
| CN104967390A (en) * | 2015-05-29 | 2015-10-07 | 山西际安电气有限公司 | Mining frequency converter peripheral control system |
| CN206517333U (en) * | 2017-01-23 | 2017-09-22 | 东莞市恒迅微型电机有限公司 | A kind of variable-frequency motor automatic speed governing device |
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Application publication date: 20180918 |