CN1029763C - Numerical control full speed rare-earth synchronous motor - Google Patents
Numerical control full speed rare-earth synchronous motor Download PDFInfo
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- CN1029763C CN1029763C CN 91101413 CN91101413A CN1029763C CN 1029763 C CN1029763 C CN 1029763C CN 91101413 CN91101413 CN 91101413 CN 91101413 A CN91101413 A CN 91101413A CN 1029763 C CN1029763 C CN 1029763C
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Abstract
The present invention discloses a digital-controlled full-speed synchronous motor using rare-earth magnet, comprising a stator and a rotor. The structure of the stator of the digital-controlled full-speed synchronous motor using rare-earth magnet is identical to the structure of the stator of a common squirrel-cage asynchronous AC electric motor, and the rotor is a solid cylinder body with smooth surface and good magnetic conductivity which is made of steel with higher rigidity. The middle of the cylinder body is provided with a plurality of slots which is filled with rare-earth magnets. Both ends of the cylinder body are respectively provided with a cover plate, and all the rare-earth magnets formed by laminating and bonding a plurality of lamellar rare-earth monomers are sealed in the rotor.
Description
The present invention relates to a kind of motor of new structure, exactly, relate to the rare-earth synchronous motor that a kind of digital control, its speed can balance work under any one speed state from low speed to the hypervelocity range, belong to infrastructure device technical field in the electro-mechanical system.
In recent years, high-techly develop the stage that can directly adopt digital technology to control automatically of many branchs of industry having been pushed to rapidly.Adopting the present age is that the digital control technology of representative will be widened existing various conventional traditional industry machine greatly with the microcomputer, pump (for example various industrial pumps, blower fan, other rotation industrial machinery such as air compressor) working range, people can be again instrument and meter for automation and system by traditional in the past various complexity the various operating states of commercial plant are controlled, and as long as these are operated (as the starting of pump, stop, lifting speed etc.), operation requires the (time, rotating speed, pressure and other parameters) etc. all use the formal representation of numeral to come out, and these the numeral by information carriers (as punched card, paper tape, floppy disc, EPROM chip etc.) give special-purpose or general microcomputer, carry out sending after the data processing optimization various commands for controlling work mechanisms by computer and make operation under the optimum condition.Like this, not only simplified the huge control equipment of commercial plant greatly; And after commonplace realization digital technology control, industrial sector department just can directly realize information management to activity in production.In fact, present industrial machine, pump all have quite wide working range, can suitably regulate its operating mode and be optimized production.But, being limited to traditional concept, the general industrial alternating current motor that adopts can not change its rotating speed.After adopting the conversion power supply technology, alternating current motor just can speed governing operation.But because during these alternating current motors of original design manufacturing, still reckon without and today to occur the new demand that Numeric Control Technology proposes motor; And owing to be subjected to the restriction of mains frequency, the rotating speed of conventional industrial alternating current motor is the highest can only to reach 3000 rev/mins (50 weeks) or 3600 rev/mins (60 week).Therefore, must be equipped with gear speedup case, motor speed is elevated to the required working speed of high speed pump again for high speed machine, pump.Adopt the numerical control converter technique, rotating speed of motor can no longer be subjected to the restriction of mains frequency, therefore can require rotating speed of motor can bring up to and high speed pump synchronised, so that directly drive high speed operation machinery.Adopt synchronous motor favourable, can economize on electricity the power factor (PF) of improving electrical network; And synchronous machine has the mechanical property of ultrahard, and efficient is higher.But traditional synchronous motor is the Induction Motor Structure complexity relatively, and adding needs complicated auxiliary equipment, so, except indivedual Large-Scale Equipments, the general user can stand more power consumption, also still generally selects low, the easy to use asynchronous motor of price for use.But the development and use of rare earth material have in recent years also obtained many achievements in the motor manufacturing technology field, replace electromagnet with magnetic soil permanent magnetic material, not only save non-ferrous metal in a large number, have also reduced power consumption.In addition, utilize digital control technology after, synchronous machine also can no longer need to be equipped with traditional auxiliary equipment.According to this new ideas, just can make the structure of synchronous AC motor the same with common squirrel-cage asynchronous motor simple.
The objective of the invention is to design for these reasons a kind of numerically controlled full speed rare-earth synchronous motor.
The present invention is achieved in that it includes stator and rotor two parts, wherein stator structure and squirrel-cage asynchronism alternating current motor are identical, and the solid Cylinder of any surface finish that the steel of rotor to be a usefulness have high stiffness and good magnetic property are made, in the middle of this Cylinder, there are several to fill up the slotted eye of laying rare earth magnet, cover plate is equipped with at the two ends of cylinder, becoming the rare earth magnet of assembly all to be enclosed in the rotor by a plurality of laminar rare earth monomer cementation laminateds.
Motor of the present invention has many characteristics.At first, it be aim at Numeric Control Technology design can with the supporting use of numerical control frequency-changing power source, and mate fully with it, as long as the control of conversion power supply is powered to it, just can control the operating state of motor of the present invention, with it and the supporting use of work mechanisms such as pump, just can constitute numerical control variable working condition unit equipment with off design performance.Structure of the present invention and cage induction motor are simple equally, but have many premium properties of synchronous machine.The common distributed polar rotor of the similar asynchronous machine of its rotor, profile are the bright and clean level and smooth solid integral body of garden cylindricality, through accurate machining, can make motor from low speed to the ultrahigh speed (10.000 like this
-24,000 rev/mins) any one state under can both smooth rotation, reach the requirement of full speed dynamic balance.Moreover, because rotor is the rare earth material permanent magnet, there is not the conductive element device in the rotor, both made full use of the rare earth material that China abounds with, can save non-ferrous metal in a large number again.And, there is not power consumption in the rotor, also therefore heating, thereby can specialized designs consider the cooling problem of rotor, its mechanical efficiency and utilization of power efficient are all than squirrel-cage motor height.During the supporting use of the present invention and DCPS digitally controlled power source, can remove any startup auxiliary equipment from and just can realize not having and impact smoothly startup.And because starting current is less than the rated current of motor when starting, the capacity of power transformer also can be therefore and corresponding minimizing.Equally, the present invention is the same with conventional synchronous machine, and it both can be used as motor driven industry pump and has used, and also can be used as the direct supporting use of generator and high-speed fuel gas turbine, and in a word, the present invention is a kind of novel foundation equipment in the electromechanical integration technology.
Below in conjunction with accompanying drawing, specifically introduce the present invention.
Fig. 1 is the external view of rotor of the present invention.
Fig. 2 is a cross section of rotor structural representation of the present invention.
Fig. 3 is the rare earth magnet structural representation of rotor of the present invention.
Stator structure of the present invention and common squirrel-cage asynchronism alternating current motor are identical, so both can be general, just any squirrel-cage motor can repack NC full-speed synchronous machine of the present invention into after having changed rare-earth rotor of the present invention.Also because stator structure is a known technology, this paper has just no longer specifically narrated, and only introduces rare-earth rotor.
As shown in Figure 1, the outward appearance of rotor of the present invention is a solid Cylinder 1 that appearance is bright and clean, this is to make with the steel with good magnetic property and high stiffness, make it not only have less magnetic resistance to satisfy the Electromagnetic Design requirement of motor, can also obtain a high as far as possible critical whirling speed, so that whole ranges of speeds of motor all are in below the one sub-critical point, can guarantee that again the Rare-Earth Magnetic physical efficiency is born high centrifugal force and unlikely damage under high speed rotating.Also be based on this reason, cover plate 2 be housed, make rare earth magnet all be encapsulated in internal rotor at the Cylinder two ends of rotor.And cover plate 2 is to be embedded in the rotor Cylinder, makes it to become firm integral body with high-strength structureal adhesives (or welding).
Fig. 2 is a cross section of rotor, corresponding to the position of laying magnet several slotted eyes 3 is arranged in the middle of the cylindrical rotors of its garden, and the slotted eye inwall needs through machine cut processing, so as its can with magnet 4 tight couplings, to reduce magnetic resistance as far as possible.And rare earth material is because of the reason on its physical and mechanical properties and the processing technology, can only make laminar monomer at present, its thickness can not be done too thickly, so the rare earth magnet in the rotor is that the assembly 7(that formed by many laminar monomer 6 cementation laminateds is referring to Fig. 3).In order with the hole wall of rotor tight identical the contact to be arranged, the outer peripheral face of rare earth magnet should be through the machining shaping, and grinding then should be carried out in its end face and bottom surface, and is tight to guarantee with the cover plate coupling, reduces magnetic resistance.Rare earth magnet is bonded into assembly, when packing the rotor slotted eye into after processing, also uses high-strength structureal adhesives it directly is bonded on the rotor.This is because rare earth material is very fragile, and is broken easily.Adopt this special construction, even can be so that there are indivedual rare earth magnets to break, the performance that still can not influence magnetic pole after bonding hinders to be used.After rotor all processes, just can magnetize to rare earth magnet, make rotor form magnetic pole, the space between magnetic pole is then tamped with epoxy resin 5 materials such as grade and is full of, and makes whole rotor form a firm solid integral body, can bear the ultrahigh speed rotation.
The domestic rare earth material that abounds with, magnet raw material of the present invention source is abundant, and the motor of working at normal temperatures can select for use the NdFeB rear-earth material to make magnet, then can select for use strontium cobalt rare earth material to make magnet at the motor that high temperature (80 ℃) is worked down.
The magneto of domestic use rare earth material manufacturing is owing to be subjected to the restriction of magnet thickness, and high-speed electric expreess locomotive power can only be accomplished tens kilowatts, and slowspeed machine has then been accomplished 200 kilowatts.As use the present invention to adopt the rare earth magnet of lamination, because of forming the assembly of certain volume, so can make the heavy-duty motor more than hundreds of kilowatts.
Claims (4)
1, a kind of numerical control full speed rare-earth synchronous motor, include stator and rotor two parts, stator structure wherein and common squirrel-cage asynchronism alternating current motor are identical, it is characterized in that rotor is the solid Cylinder that a usefulness has any surface finish that the higher steel of good magnetic property and rigidity make, have several to fill up the slotted eye of laying rare earth magnet in the middle of this Cylinder, the two ends of cylinder are equipped with cover plate and are become a plurality of laminar rare earth monomer cementation laminateds the rare earth magnet of assembly all to be enclosed in the rotor.
2, numerical control full speed rare-earth synchronous motor as claimed in claim 1, the end face that it is characterized in that rare earth magnet and bottom surface should make its surface smoothing bright and clean, with cover plate the good grinding that contacts is arranged.
3, numerical control full speed rare-earth synchronous motor as claimed in claim 1 is characterized in that its inwall of slotted eye of rotor should be through cut so that its can with the tight coupling of magnet, reduce magnetic resistance.
4, numerical control full speed rare-earth synchronous motor as claimed in claim 1, the material that it is characterized in that rare earth magnet can be neodymium iron boron or strontium cobalt, and the former is applicable to work under the normal temperature, and the latter can work at high temperature (80 ℃).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101413 CN1029763C (en) | 1991-03-12 | 1991-03-12 | Numerical control full speed rare-earth synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101413 CN1029763C (en) | 1991-03-12 | 1991-03-12 | Numerical control full speed rare-earth synchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1064770A CN1064770A (en) | 1992-09-23 |
| CN1029763C true CN1029763C (en) | 1995-09-13 |
Family
ID=4905070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91101413 Expired - Fee Related CN1029763C (en) | 1991-03-12 | 1991-03-12 | Numerical control full speed rare-earth synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029763C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10673291B2 (en) * | 2015-06-17 | 2020-06-02 | Mitsubishi Electric Corporation | Permanent-magnet electric motor |
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1991
- 1991-03-12 CN CN 91101413 patent/CN1029763C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1064770A (en) | 1992-09-23 |
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