CN101707414A - Direct-drive type permanent magnet synchronous motor dedicated to mine hoister - Google Patents
Direct-drive type permanent magnet synchronous motor dedicated to mine hoister Download PDFInfo
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- CN101707414A CN101707414A CN200910220244A CN200910220244A CN101707414A CN 101707414 A CN101707414 A CN 101707414A CN 200910220244 A CN200910220244 A CN 200910220244A CN 200910220244 A CN200910220244 A CN 200910220244A CN 101707414 A CN101707414 A CN 101707414A
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Abstract
The invention relates to a direct-drive type permanent magnet synchronous motor dedicated to mine hoister, which is a driver motor dedicated to large machinery equipment, belonging to the technical field of electromotor. The direct-drive type permanent magnet synchronous motor dedicated to mine hoister provided by the invention can improve driving efficiency of the mine hoisting system, reinforce reliability of system running, reduce maintenance difficulty and dispense with reduction gears. The direct-drive type permanent magnet synchronous motor dedicated to mine hoister comprises a motor shell, a rotor embedded with a permanent magnet is arranged at the center in the motor shell, a stator magnetic core winded with stator winding is arranged at the outside of the rotor, and the stator magnetic core is fixed on the motor shell. The invention is characterized in that the stator winding is connected with a frequency converter by leads.
Description
Technical field:
The invention belongs to the motor technology field, particularly a kind of mine hoist is direct-drive type permanent magnet synchronous motor dedicated, is the driver motor of big machinery equipment usefulness.
Background technology:
Mine hoist is being undertaken the vital task that promotes coal as a typical machinery, electric one-piece type equipment, have the title of " mine throat ", and the motor of mine hoist is its core component.
At present, existing mine hoist mainly adopts following three class motor drive systems:
1, exchange the wound rotor asynchronous motor dragging system:
Exchange the phase I that the wound rotor asynchronous motor dragging system is mine hoist Electric Traction development, because squirrel cage asynchronous motor is difficult to satisfy the requirement of mine hoist starting and speed adjusting performance, therefore, mine hoist adopts wound rotor asynchronous motor to drag more.Can limit starting current after the wound rotor asynchronous motor rotor loop crosstalk resistance and improve starting torque, and speed governing within the specific limits.Advantages such as this system has simple in structure, and is sturdy and durable, and construction area is little, easy to maintenance, cheap, and Installation and Debugging are convenient.But its start-up period electric energy loss is bigger, and when being used for the multi level hoisting machine of the requirement Fraquent start or the different speeds of service, this problem is just more outstanding.Owing to carry out speed governing by excision rotor loop resistance, so the speed adjusting performance of system is bad, speed adjustable range is little and be step speed regulation.
2, generating set-DC motor dragging system:
Because the speed adjusting performance of wound rotor asynchronous motor is not ideal enough, so people just begin to adopt generating set-DC motor driving style.The mechanical property of DC motor is a straight line, and speed adjusting performance is better, and it is more reliable to work.The main lifting motor of generating set-DC motor dragging system is the separated exciting DC motor, the separated exciting DC motor is directly powered to it by the DC generator that synchronous motor drives, change the voltage at DC motor armature two ends by the excitation size that changes DC generator, thereby change the rotating speed of motor, reach the speed governing purpose of elevator.The speed closed loop mode of speed regulation that this dragging system adopts magnetic amplifier and amplidyne two-stage to amplify.To the signal that certain portions is sent here, be added on the given winding of double-beat magnetic amplifier, after amplifying, magnetic amplifier supplies with the given winding of amplidyne, the excitation winding of sending and receiving motor after amplidyne amplifies once more.The feedback winding of magnetic amplifier and amplidyne is received separately output respectively by the negative feedback connection, and magnetic amplifier constitutes the external feedback link, and amplidyne constitutes the voltage negative feedback element, makes magnetic amplifier and amplidyne have comparatively ideal characteristic.Obtain feedback speed signal by the tachogenerator that is connected with the hard axle of elevator, this feedback speed signal is added on the magnetic amplifier speed feedback winding and given signal comprehensively compares, and constitutes the negative velocity feedback link.The advantage of this dragging system is: overload capacity is strong, and equipment needed thereby is conventional approved product, and the supply of material is easy, and reliable, specification requirement is not high, can not cause injurious effects to the electrical network beyond the system; Its shortcoming is: efficient is low, on average has only about 75%; Speed adjustable range is because the remanent magnetism influence can not be excessive; The equipment complexity, huge, floor space is big etc.At present, the less employing of this system.
3, the dc trailing system of thyristor rectifier device power supply:
From early 1960s to the seventies, in this nearly 20 years time, be accompanied by the develop rapidly of power electronic technology, the dc trailing system of thyristor rectifier device power supply is developed rapidly and is popularized, this is the second stage of mine hoist Electric Traction development. for obtaining the reversible operation characteristic to realize the four-quadrant speed governing, this dragging system has two kinds of electrical control schemes usually: a kind of is the reversible automatic speed regulation scheme of armature, the polarity of the armature voltage by changing DC motor changes the traffic direction of elevator; Another kind is the reversible automatic speed regulation scheme in magnetic field, by changing DC motor exciting current direction, no matter change the traffic direction of elevator. take which kind of scheme, speed regulating method is generally based on pressure regulation, adjustable magnetic is auxilliary. the reversible automatic speed regulation scheme of armature need change the sense of current in motor armature loop, because the armature circuit inductance is less, time constant little (a few tens of milliseconds approximately), reverse procedure carries out soon, therefore, be applicable to Fraquent start, the multi level hoisting system of braking. still, this scheme major loop needs the bigger thyristor converter devices of two cover capacity, one-time investment is bigger, the elevator capacity is big more, this problem is just outstanding more. and magnetic field reversible automatic speed regulation scheme major loop is only with a cover thyristor converter devices, energized circuit adopts two cover thyristor converter devices. because exciting power is less, so the equipment total capacity is more much smaller than the reversible automatic speed regulation scheme of armature, one-time investment is less. still, because the energized circuit inductance value is bigger, time constant big (several seconds zero point is to the several seconds approximately), therefore, this system reverse process is slower, after adopting field-forcing, its rapidity can obtain compensation to a certain degree, but switching time is still more than the hundreds of millisecond. should be pointed out that the reversible automatic speed regulation system in magnetic field in the motor Umklapp process, when exciting current changes direction, the armature voltage that should make motor is zero, with prevent motor in handoff procedure owing to lose excitation " driving ", this has not only increased the dead band of reverse procedure, has also increased the complexity of control system.
Above-mentioned three class mine hoists exist all with motor drive system that some we do not wish the shortcoming and the problem that exist.Such as: the existence of reductor, not only increased cost, also cause the transmission efficiency of whole drive system greatly to reduce, and exist problems such as difficult in maintenance.The worm gear that adopts mostly in the mine hoist, the machine room that worm-drive reductor volume is big, needs are bigger, not only construction area is big, and influences the good looking appearance of building.Because the worm screw end connects the asynchronous motor of a high-speed cruising, its bearing noise is big during operation, and its operation noise is generally about 60～70db.Gear drive exists mechanical wear inevitably, and along with the increase of running time, wearing and tearing make between the moving component gap become big, cause noise aggravation, transmission efficiency to descend.In mechanical driving device, though worm gear, endless screw transmission agent have the big advantage of gearratio, its transmission efficiency is low, consumed energy big, the operation noise is big etc., and shortcoming can't overcome.Generally speaking, the transmission efficiency of worm gear, endless screw transmission agent has 30% electric energy to be wasted with the thermal losses form between 67～78% approximately.For the frictional heat that produces in the wearing and tearing that reduce worm gear, worm screw and the transmission slip process, the use of lubricating oil is essential, periodic replacement lubricating oil has not only increased the regular maintenance expense, and the oil gas that produces in the running and greasy dirt also can cause direct pollution to environment.There is the low shortcoming of power factor in the dc trailing system of thyristor rectifier device power supply, although adopted sequential control technology, power factor is still lower, need absorb a large amount of reactive powers by electrical network, and the electrical network quality factor are produced serious influence.The capacity of mine hoist is big more, and this problem is just outstanding more.On the other hand, the commutator in DC motor armature loop has limited the further increase of elevator capacity, and along with the continuous expansion of deep mining trend, the elevator single-machine capacity will continue to increase, and the commutation commutator of motor has just become a weak link.
Summary of the invention:
With the problem that motor drive system exists, the invention provides a kind of transmission efficiency that improves mine hoisting system at existing mine hoist, the enhanced system reliability of operation reduces maintenance difficulty; And the mine hoist of having cancelled reductor is direct-drive type permanent magnet synchronous motor dedicated.
To achieve these goals, the present invention adopts following technical scheme, a kind of mine hoist is direct-drive type permanent magnet synchronous motor dedicated, the housing that comprises motor, center in the housing of motor is provided with the rotor that is embedded with permanent magnet, arranged outside at rotor has the stator core that is wound with stator winding, and described stator core is fixed on the housing of motor; Be characterized in that described stator winding is connected with frequency converter by lead-in wire.
Described rotor comprises that the center has the rotor supports iron of through hole, has the rotating pole-piece of groove and every the magnet steel circle, the bottom of described rotating pole-piece links together every magnet steel circle and rotor supports ferropexy by being bolted on the magnet steel circle; Described permanent magnet is arranged in the groove between rotating pole-piece.
Can fix more easily for the housing that makes motor when mounted, be provided with support in the housing both sides of motor, the housing of motor is fixed together by support screw and support.
Described stator core is by on the housing that is bolted to motor.
Describedly cross bolt every magnet steel circle and rotor supports Tie Tong and link together.
The reel rotating shaft of described rotor supports iron and mine hoist is bolted to connection together.
Beneficial effect of the present invention:
1, the rotor of permanent magnet synchronous motor of the present invention directly is installed in the reel rotating shaft of mine hoist, compares with common shaft coupling connected mode, and this structure is simpler, more helps the raising of whole system efficient; Frequency changing start up process is steady, superior performance; Cancel the starting winding, not only can reduce cost, can also reduce difficulty of processing, improved energy-saving effect.
2, be the permanent magnet synchronous motor power supply owing to the present invention adopts frequency converter, realize the varying frequency starting of permanent magnet synchronous motor; Just make permanent magnet synchronous motor of the present invention can realize low cruise, export bigger torque, directly drive mine hoist work, cancelled reductor, improved system works efficient.
3, because rotor of the present invention comprises the center has the rotor supports iron of through hole, has the rotating pole-piece of groove and every the magnet steel circle, the bottom of described rotating pole-piece links together every magnet steel circle and rotor supports ferropexy by being bolted on the magnet steel circle; Described permanent magnet is arranged in the groove between rotating pole-piece; Just make direct-drive type permanent magnet synchronous motor of the present invention greatly reduce the quality of rotor and the complexity of rotor structure, make assembling easier.And the present invention can protect permanent magnet not fragile by rotating pole-piece, can avoid common frequency conversion permanent magnet motor to adopt the surface-mount type rotor structure effectively, when mounted permanent magnet because of with the generation of the broken phenomenon of collision of stator core.
4, the present invention can make the reluctance torque of installation process be reduced to zero, has reduced installation difficulty, has reduced requirement and dependence to erecting tools, more helps permanent magnet synchronous motor and develops to powerful direction.
The advantage of direct-drive type permanent magnet synchronous motor of the present invention is: it is restricted hardly 1. to promote capacity, maximum can reach 10000kW, and hoisting velocity can reach more than the 20m/s, and hoisting depth can reach more than the 1200m, drum diameter can reach 5m, and this is that direct current system is unapproachable; 2. do not have this weak link of commutator and carbon brush, guaranteed the reliability service of motor and reduced operation to consume; 3. the power factor height can reach 0.9～1, has greatly saved electric energy; 4. dynamic quality is good, and system can seamlessly transit and stepless speed regulation at four-quadrant; 5. because mechanical property is good, so starting torque is big; 6. the price of synchronous motor is lower than DC generator; 7. speed-regulating range width.
Description of drawings:
Fig. 1 is the structural representation of the user mode of permanent magnet synchronous motor of the present invention;
Fig. 2 is the rotor of permanent magnet synchronous motor of the present invention and the structural representation of permanent magnet;
Fig. 3 is rotating pole-piece of the present invention, every the structural representation of magnet steel circle and permanent magnet;
Fig. 4 is the structural representation of auxiliary stator end cap of the present invention;
Fig. 5 is the structural representation of stator end cap of the present invention;
Among the figure: 1-reel right bearing, 2-reel, 3-reel left bearing, the rotating shaft of 4-reel, the 5-rotor, 6-permanent magnet, 7-stator core, 8-stator winding, the housing of 9-motor, 10-support screw, 11-lead-in wire, 12-frequency converter, 13-through hole, 14-rotor supports iron, 15-be every the magnet steel circle, the 16-bolt, the 17-rotating pole-piece, 18-groove, 19-auxiliary stator loam cake, 20-auxiliary stator lower cover, the 21-first stator end cap, the 22-second stator end cap, 23-the 3rd stator end cap.
Embodiment:
The present invention is described further below in conjunction with accompanying drawing:
A kind of mine hoist is direct-drive type permanent magnet synchronous motor dedicated, the housing 9 that comprises motor, center in the housing 9 of motor is provided with the rotor 5 that is embedded with permanent magnet 6, arranged outside at rotor 5 has the stator core 7 that is wound with stator winding 8, and described stator core 7 is fixed on the housing 9 of motor; Described stator winding 8 11 is connected with frequency converter 12 by going between.
Described rotor 5 comprises that the center has the rotor supports iron 14 of through hole 13, has the rotating pole-piece 17 of groove 18 and every magnet steel circle 15, the bottom of described rotating pole-piece 17 is fixed on magnet steel circle 15 by bolt 16, is fixed together every magnet steel circle 15 and rotor supports iron 14; Described permanent magnet 6 is arranged in the groove 18 of 17 of rotating pole-pieces.
For the housing 9 that makes motor when mounted can be fixed more easily, be provided with support in housing 9 both sides of motor, the housing 9 of motor is fixed together by support screw 10 and support.
Described stator core 7 is fixed on the housing 9 of motor by bolt 16.
Describedly be fixed together by bolt 16 every magnet steel circle 15 and rotor supports iron 14.
Described rotor supports iron 14 is bolted to connection together with the reel rotating shaft 4 of mine hoist.
Field-mounted process below in conjunction with description of drawings direct-drive type permanent magnet synchronous motor of the present invention:
The processing and the manufacturing process of each parts in the direct-drive type permanent magnet synchronous motor of the present invention are finished in factory, and its installation process then is to finish in the site of deployment of mine hoist.During on-the-spot the installation, at first the housing 9 with stator winding 8, stator core 7, rotor 5 and the motor of direct-drive type permanent magnet synchronous motor of the present invention assembles as requested, rotor 5 is installed in the reel rotating shaft 4 of mine hoist by the mechanical handling instrument then, the reel rotating shaft 4 of mine hoist is arranged on reel and uses on the right bearing 1 with left bearing 3 and reel.With crane the housing 9 of motor stator and motor is sling,, guaranteed that the air gap of motor is even by auxiliary stator loam cake 19 and auxiliary stator lower cover 20.The housing 9 of motor is fixed on the assigned address of working site by support screw 10 and support, permanent magnet 6 is installed in the groove 18 of 17 of rotating pole-pieces.After the installation, remove auxiliary stator loam cake 19 and auxiliary stator lower cover 20, the stator end cap is installed on the housing 9 of motor, guarantee that motor seal is good.At last, behind frequency converter 12 and stator winding 8 lines, can give permanent magnet synchronous motor power supply of the present invention, realize the varying frequency starting of permanent magnet synchronous motor by frequency converter 12.So far, finished the installation process of direct-drive type permanent magnet synchronous motor of the present invention.Direct-drive type permanent magnet synchronous motor of the present invention can enter operating state, finishes the coal mining task.
Claims (6)
1. a mine hoist is direct-drive type permanent magnet synchronous motor dedicated, the housing that comprises motor, center in the housing of motor is provided with the rotor that is embedded with permanent magnet, arranged outside at rotor has the stator core that is wound with stator winding, and described stator core is fixed on the housing of motor; It is characterized in that described stator winding is connected with frequency converter by lead-in wire.
2. a kind of mine hoist according to claim 1 is direct-drive type permanent magnet synchronous motor dedicated, it is characterized in that described rotor comprises that the center has the rotor supports iron of through hole, has the rotating pole-piece of groove and every the magnet steel circle, the bottom of described rotating pole-piece links together every magnet steel circle and rotor supports ferropexy by being bolted on the magnet steel circle; Described permanent magnet is arranged in the groove between rotating pole-piece.
3. a kind of mine hoist according to claim 1 is direct-drive type permanent magnet synchronous motor dedicated, it is characterized in that being provided with support in the housing both sides of motor, and the housing of motor is fixed together by support screw and support.
4. a kind of mine hoist according to claim 1 is direct-drive type permanent magnet synchronous motor dedicated, it is characterized in that described stator core is by on the housing that is bolted to motor.
5. a kind of mine hoist according to claim 2 is direct-drive type permanent magnet synchronous motor dedicated, it is characterized in that describedly crossing bolt every magnet steel circle and rotor supports Tie Tong and linking together.
6. a kind of mine hoist according to claim 2 is direct-drive type permanent magnet synchronous motor dedicated, it is characterized in that the reel rotating shaft of described rotor supports iron and mine hoist is bolted to connection together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910220244A CN101707414A (en) | 2009-11-27 | 2009-11-27 | Direct-drive type permanent magnet synchronous motor dedicated to mine hoister |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910220244A CN101707414A (en) | 2009-11-27 | 2009-11-27 | Direct-drive type permanent magnet synchronous motor dedicated to mine hoister |
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| CN101707414A true CN101707414A (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910220244A Pending CN101707414A (en) | 2009-11-27 | 2009-11-27 | Direct-drive type permanent magnet synchronous motor dedicated to mine hoister |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862884A (en) * | 2011-07-08 | 2013-01-09 | 上海华菱电站成套设备有限公司 | Control device of alternating current/ direct current/ alternating current frequency conversion lifting machine |
| CN111835149A (en) * | 2020-07-20 | 2020-10-27 | 洛阳洛信矿山机器有限公司 | Mine hoisting system health state monitoring method based on main shaft measuring point strain |
| CN114006509A (en) * | 2021-11-15 | 2022-02-01 | 洛阳永磁重型机械设备有限公司 | On-site assembly method of direct-connection suspension type permanent magnet low-speed synchronous mining lifting equipment |
-
2009
- 2009-11-27 CN CN200910220244A patent/CN101707414A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862884A (en) * | 2011-07-08 | 2013-01-09 | 上海华菱电站成套设备有限公司 | Control device of alternating current/ direct current/ alternating current frequency conversion lifting machine |
| CN111835149A (en) * | 2020-07-20 | 2020-10-27 | 洛阳洛信矿山机器有限公司 | Mine hoisting system health state monitoring method based on main shaft measuring point strain |
| CN114006509A (en) * | 2021-11-15 | 2022-02-01 | 洛阳永磁重型机械设备有限公司 | On-site assembly method of direct-connection suspension type permanent magnet low-speed synchronous mining lifting equipment |
| CN114006509B (en) * | 2021-11-15 | 2023-06-30 | 洛阳永磁重型机械设备有限公司 | On-site assembly method of direct-connection suspension type permanent magnet low-speed synchronous mining lifting equipment |
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Application publication date: 20100512 |