CN103312117A - Permanent magnet speed controller - Google Patents
Permanent magnet speed controller Download PDFInfo
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- CN103312117A CN103312117A CN2013102175576A CN201310217557A CN103312117A CN 103312117 A CN103312117 A CN 103312117A CN 2013102175576 A CN2013102175576 A CN 2013102175576A CN 201310217557 A CN201310217557 A CN 201310217557A CN 103312117 A CN103312117 A CN 103312117A
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Abstract
The invention discloses a permanent magnet speed controller, comprising an outer rotor connected with a first shaft and an inner rotor connected with a second shaft, wherein the outer rotor is provided with a first rotor disc and a second rotor disc, the inner rotor is provided with a third rotor disc, a fourth rotor disc and an intermediate disc, the intermediate disc is connected with the second shaft and is positioned between the third rotor disc and the fourth rotor disc, the third rotor disc is slidably sleeved on the second shaft, the fourth rotor disc is connected with a speed control mechanism, a plurality of transmission twist pins and an air gap regulating device are arranged among the third rotor disc, the intermediate disc and the fourth rotor disc in a penetrating way, the air gap regulating device comprises a gear and two parallel racks, the two racks are positioned at the two sides of the gear respectively and are meshed with the gear, the gear is arranged on the intermediate disc, one rack is fixedly connected to the third rotor disc, and the other rack is fixedly connected to the fourth rotor disc. The permanent magnet speed controller has the advantages of simplifying the structure of the air gap regulating device, reducing the manufacturing cost and being more convenient for controlling the precision of air gaps at the two sides when being assembled.
Description
Technical field
The present invention relates to a kind of permanent magnetic speed-adjusting device, specifically, relate to a kind of permanent-magnet speed governor that reaches the speed governing purpose by the air gap between adjusting p-m rotor and the conductor rotor.
Background technology
The Chinese invention patent application 98802726.7 that U.S. Magna Force Inc. proposed on February 20th, 1998 discloses a kind of adjustable magnetic coupler, it has: be installed in two conductor rotor on first rotating shaft, be installed in two p-m rotors that respectively comprise corresponding one group of permanent magnet on second rotating shaft; Two p-m rotors are mounted to and are positioned in the middle of two conductor rotor, respectively maintain air gap between each p-m rotor and the right conductor rotor, and this air gap can increase under the effect of push-pull mechanism or reduce simultaneously.Changing corresponding with air gap is the change of output torque, make load equipment obtain different torques and produce different rotating speeds, and the constant rotating speed of motor maintenance is constant.
But this magnetic coupler also exists more defective, is mainly reflected in the following aspects:
One, the vortex flow caloric value that produces on the conductor disc is huge, relies on existing fin shape fin thermolysis limited, very easily makes magnetic coupler Yin Gaowen and burns.
Two, the noise problem that in the equipment operation process, produces of fin shape fin.
Three, be arranged in p-m rotor air gap adjusting device complex structure, manufacturing cost is high, assembly difficulty is big.
Four, p-m rotor is installed in an end of output shaft, owing on the p-m rotor a large amount of permanent magnets are installed, total quality is very big, makes output shaft bigger radial run-out occur easily in rotation process.
Five, the cam mechanism in the speed governing inside and outside sleeve because cam bawl adopts the sliding contact formula slide block that contacts with grooved surface, in case lose the lubricated of lubricating grease, very easily makes slide block stuck in groove; Simultaneously, also can't accurately control the axial displacement of speed adjusting gear, do not reach desired size of gaps, also just accurately speed governing.
Six, under some vertical installation environment, can't use the magnetic coupler of this horizontal versions.
The existence of above-mentioned defective has influenced the run stability of whole permanent-magnet speed governor, has both limited and has adopted permanent-magnet speed governor in the application of some occasion of having relatively high expectations, and has also limited the wide popularization and application of permanent-magnet speed governor.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of permanent-magnet speed governor of simple in structure, easy to assembly, the easier control of size of gaps, to overcome the above-mentioned defective of prior art.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of permanent-magnet speed governor, comprise with first external rotor that is connected, with second internal rotor that is connected and the speed adjusting gear that is connected with internal rotor, described external rotor is provided with the first rotor dish and second rotor disk, described internal rotor is provided with third trochanter dish and fourth trochanter dish, the first rotor dish is relative with the third trochanter dish and maintain air gap, and second rotor disk is relative with the fourth trochanter dish and maintain air gap; Described internal rotor also comprises a telophragma, described telophragma is fixedlyed connected with second and between third trochanter dish and fourth trochanter dish, the third trochanter dish is socketed on second slidably, the fourth trochanter dish then is connected with described speed adjusting gear by bearing, the third trochanter dish, wear the many torsion pass pins parallel with second between telophragma and the fourth trochanter dish, the third trochanter dish, also be provided with the air gap adjusting device between fourth trochanter dish and the telophragma, described air gap adjusting device comprises a gear and two parallel tooth bars, two toothed rack lay respectively at the both sides of described gear and mesh with gear, described gear is installed in rotation on the telophragma, wherein a toothed rack is fixedly connected on the third trochanter dish, and another toothed rack is fixedly connected on the fourth trochanter dish.
Preferably, described speed adjusting gear comprises a bearing pedestal and a sliding outer cover, be provided with bearing between described bearing pedestal and second, the external cylindrical surface of described bearing pedestal is provided with helicla flute, the lower end of described sliding outer cover is enclosed within on the bearing pedestal, and roller and swing arm are fixedly arranged on the sliding outer cover, and described roller inserts in the helicla flute of bearing pedestal, described swing arm is connected with an electric actuator, and the upper end of described sliding outer cover is enclosed within second slidably and goes up and be connected with the fourth trochanter dish by bearing.
Preferably, the first rotor dish on the described external rotor is conductor disc, and second rotor disk is the permanent magnetism dish; Third trochanter dish on the described internal rotor is the permanent magnetism dish, and the fourth trochanter dish is conductor disc.
Further, the described the first rotor dish back side is provided with fin.
Preferably, connect into cage structure by polylith air gap plate between the first rotor dish on the described external rotor and second rotor disk, also be provided with the wind blade of along the circumferential direction arranging between adjacent two blocks of air gap plates.
Further, also comprise an outer cylinder, described external rotor, internal rotor and speed adjusting gear all are positioned at outer cylinder, and described electric actuator is fixedly mounted on the barrel outside of outer cylinder, and electric actuator is connected with described swing arm by a connecting rod that passes described barrel.
More preferably, described bearing pedestal is fixed on the base plate of outer cylinder.
More preferably, have a plurality of inspection holes on the barrel of described outer cylinder, mesh plate is installed in the inspection hole; On the inwall of outer cylinder, inspection hole around the polylith wind deflector is installed.
Compared with prior art, the technical solution adopted in the present invention has the following advantages:
(1) simplifies the structure of air gap adjusting device, reduced manufacturing cost, when assembling, be more convenient for controlling the precision of both sides air gap.
(2) in the speed adjusting gear, adopt and the contacted roller of helicla flute, rotate flexibly, be difficult for stuck; Simultaneously, because roller and spiral fluted contact area are littler, can accurately control the axial displacement of speed adjusting gear, reach the requirement of any size of gaps of accurate adjustment.
(3) one of them rotor disk on the internal rotor is the permanent magnetism dish, and another is conductor disc, has greatly alleviated the weight of internal rotor, reduced moment of inertia, and the stressing conditions of second cantilever end is improved, and more steady in rotation process, good damping result.
(4) give up available technology adopting fin type heat radiating fin structure, used the wind blade that is arranged on the external rotor circumferencial direction instead, promoted the radiating efficiency of air-cooled permanent-magnet speed governor, the noise when having reduced equipment operation.
(5) the present invention can be applicable under the conventional vertical installation environment, is connected with vertical machine.
Description of drawings
Fig. 1 is the structure cutaway view of a kind of permanent-magnet speed governor of the present invention.
Fig. 2 is the schematic diagram of the air gap adjusting device on the internal rotor among the present invention.
Fig. 3 is the connection diagram of the torsion pass pin on the internal rotor among the present invention.
Fig. 4 is the STRUCTURE DECOMPOSITION schematic diagram of internal rotor among the present invention.
Fig. 5 is the schematic diagram of speed adjusting gear among the present invention.
Fig. 6 is the perspective view of external rotor among the present invention.
Fig. 7 is the schematic diagram of a kind of p-m rotor among the present invention.
Fig. 8 is the structure cutaway view of a kind of outer cylinder among the present invention.
Fig. 9 is the annexation schematic diagram of electric actuator and speed adjusting gear among the present invention.
Among the figure:
1, external rotor 2, internal rotor 3, bearing 4, bearing
5, speed adjusting gear 6, bearing pedestal 7, electric actuator 8, outer cylinder
9, connecting rod 10, permanent magnet 11, the first rotor dish 12, second rotor disk
13, air gap plate 14, wind blade 15, fin 21, third trochanter dish
22, fourth trochanter dish 23, telophragma 24, torsion pass pin 25, gear
26a, tooth bar 26b, tooth bar 27, pin-and-hole 28, rack bore
29, pin-and-hole 51, sliding outer cover 52, roller 53, swing arm
61, helicla flute 71, rocking bar 81, barrel 82, base plate
83, inspection hole 84, adpting flange 85, wind deflector 100, first
200, second
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail, those skilled in the art can more clearly understand other advantages of the present invention and effect thus.
Need to prove that the structure that Figure of description illustrates, ratio, size etc. only in order to cooperate embodiment, more clearly understand design of the present invention for those skilled in the art, are not in order to limit protection scope of the present invention.The adjustment of the modification of any structure, the change of proportionate relationship or size not influencing under the situation that effect of the present invention and purpose reach, all should still drop within protection scope of the present invention.For convenience of description, the relative position relation of each parts is that the Butut mode according to Figure of description is described, as: the position relation of upper and lower, left and right etc. is what to determine according to the Butut direction of Figure of description.
As shown in Figure 1, a kind of permanent-magnet speed governor of the present invention comprises an external rotor 1 and an internal rotor 2, and internal rotor 2 is positioned at the inside of external rotor 1.External rotor 1 is connected with first 100, and internal rotor 2 is connected with second 200, and one in first 100 and second 200 is power shaft, and another root is output shaft, and in the present embodiment, first 100 is power shaft, is used for being connected with motor shaft; Second 200 is output shaft, is used for being connected with load equipment.
Be provided with a telophragma 23 between third trochanter dish 21 and fourth trochanter dish 22, telophragma 23 is connected with second 200 key, thereby can transmit moment of torsion.
As shown in Figure 3, Figure 4, wear the many torsion pass pins 24 parallel with second between third trochanter dish 21, telophragma 23 and the fourth trochanter dish 22, be used for the moment of torsion of third trochanter dish 21 and fourth trochanter dish 22 is passed to telophragma 23, and then pass to second.Preferably, wherein a part of torsion pass pin 24 is fixed on the third trochanter dish 21, and be slidingly matched with pin-and-hole 29, the pin-and-hole 27 on the fourth trochanter dish on the telophragma, another part torsion pass pin 24 is fixed on the fourth trochanter dish 22, and is slidingly matched with pin-and-hole 29, the pin-and-hole 27 on the third trochanter dish on the telophragma.
As Fig. 2, shown in Figure 4, between third trochanter dish 21, fourth trochanter dish 22 and telophragma 23, also be provided with the air gap adjusting device, described air gap adjusting device comprises tooth bar 26a, the 26b that a gear 25 is parallel with two, two toothed rack 26a, 26b lay respectively at the both sides of gear 25 and mesh with gear 25, gear 25 is installed in rotation on the telophragma 23, wherein the end of a toothed rack 26a is fixedly connected on the third trochanter dish 21, and the other end passes telophragma 23 and can insert in the rack bore 28 corresponding on the fourth trochanter dish; The end of another toothed rack 26b is fixedly connected on the fourth trochanter dish 22, and the other end passes telophragma 23 and can insert in the rack bore 28 corresponding on the third trochanter dish.When fourth trochanter dish 22 be subjected to external force away from or when the telophragma 23, this air gap adjusting device can guarantee third trochanter dish 21 also synchronously away from or near telophragma 23, thereby keep the air gap at internal rotor two ends to equate.
Above-mentioned torsion pass pin and air gap adjusting device can arrange many groups, and be along the circumferential direction uniform.
Continuation is with reference to Fig. 1, third trochanter dish 21 is socketed in second 200 upper end slidably by a sliding sleeve, 22 on fourth trochanter dish is connected by the upper end of bearing 3 with a speed adjusting gear 5, the effect of speed adjusting gear 5 just is to apply external force to fourth trochanter dish 22, make its away from or near telophragma 23, thereby drive above-mentioned air gap adjusting device action, regulate the air gap between internal rotor 2 and the external rotor 1.
In conjunction with Fig. 1, Fig. 5 and Fig. 9, speed adjusting gear 5 comprises a bearing pedestal 6 and a sliding outer cover 51, be provided with bearing 4 between bearing pedestal 6 and second 200, be provided with helicla flute 61 at the external cylindrical surface of bearing pedestal 6, the lower end of described sliding outer cover 51 is enclosed within on the bearing pedestal 6, roller 52 and swing arm 53 are fixedly arranged on the sliding outer cover 51, roller 52 inserts in the helicla flute 61 of bearing pedestal, and can roll in helicla flute 61, adopts self-lubricating structure in addition, stuck phenomenon can not take place, it is more reliable to work.Swing arm 53 can be connected with an electric actuator 7, electric actuator 7 is hinged by the end of a rocking bar 71 with connecting rod 9, the other end of connecting rod 9 and swing arm 53 are hinged, can drive sliding outer cover 51 rotates, because the effect of helicla flute 61, sliding outer cover 51 can produce axial motion when rotating, and the upper end of sliding outer cover 51 is enclosed within on second 200 slidably and be connected with fourth trochanter dish 22 by bearing 3, therefore, the rotation of sliding outer cover 51 can promote fourth trochanter dish 22 away from or near telophragma 23, regulate the air gap between internal rotor 2 and the external rotor 1.
According to the operation principle of permanent magnetism coupling device, regulate the size of gaps between internal rotor 2 and the external rotor 1, can regulate the slippage between internal rotor 2 and the external rotor 1, and then reach stepless stepless speed control, realize energy-efficient.
As shown in Figure 6, in a preferred embodiment of the present invention, connect into cage structure by polylith air gap plate 13 between the first rotor dish 11 on the external rotor 1 and second rotor disk 12, also be provided with the wind blade of along the circumferential direction arranging 14 between adjacent two blocks of air gap plates 13, when external rotor 1 rotates, wind blade 14 can produce the effect of similar fan, accelerates circulation of air, improves radiating effect greatly.In addition, at the first rotor dish 11 back sides fin 15 is set, fin 15 is directly exposed in the air, in rotation process, can distribute rotor disk 11(conductor disc by the air cooling mode) in the heat that produces because of eddy current.Therefore the present invention has good air cooling effect, and can not produce very big noise.
In conjunction with Fig. 1, Fig. 8, the preferred embodiments of the present invention also comprise an outer cylinder 8, described external rotor 1, internal rotor 2 all are positioned at outer cylinder 8 with speed adjusting gear 5, described electric actuator 7 is fixedly mounted on barrel 81 outsides of outer cylinder, connecting rod 9 passes described barrel 81 and is connected with swing arm 53, and the lower end of bearing pedestal 6 is fixed on the base plate 82 of outer cylinder, and base plate 82 can be fixedly mounted on the plane, the upper end of outer cylinder 8 is provided with adpting flange 84, so that be connected with motor.Have a plurality of inspection holes 83 on the barrel of outer cylinder, the outer cover mesh plate is convenient to observe internal operations situation and ventilation; On the inwall of outer cylinder 8, around the inspection hole 83, polylith wind deflector 85 is installed, forces the hot-air of outer cylinder 8 inside to be discharged from inspection hole 83 according to the direction that requires and position, be conducive to internal heat dissipating.
Certainly, more than only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.In addition to the implementation, the present invention can also have other execution mode.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the present invention's scope required for protection.
Claims (8)
1. permanent-magnet speed governor, comprise the external rotor (1) that is connected with first (100), the internal rotor (2) that is connected with second (200) and the speed adjusting gear (5) that is connected with internal rotor (2), described external rotor (1) is provided with the first rotor dish (11) and second rotor disk (12), described internal rotor (2) is provided with third trochanter dish (21) and fourth trochanter dish (22), the first rotor dish (11) is relative with third trochanter dish (21) and maintain air gap, and second rotor disk (12) is relative with fourth trochanter dish (22) and maintain air gap; It is characterized in that, described internal rotor (2) also comprises a telophragma (23), described telophragma (23) is fixedlyed connected with second (200) and is positioned between third trochanter dish (21) and the fourth trochanter dish (22), third trochanter dish (21) is socketed on second (200) slidably, fourth trochanter dish (22) then is connected with described speed adjusting gear (5) by bearing, third trochanter dish (21), wear the many torsion pass pins (24) parallel with second (200) between telophragma (23) and the fourth trochanter dish (22), third trochanter dish (21), also be provided with the air gap adjusting device between fourth trochanter dish (22) and the telophragma (23), described air gap adjusting device comprises the tooth bar (26a that a gear (25) is parallel with two, 26b), two toothed rack (26a, 26b) lay respectively at the both sides of described gear (25) and mesh with gear (25), described gear (25) is installed in rotation on the telophragma (23), wherein a toothed rack (26a) is fixedly connected on the third trochanter dish (21), and another toothed rack (26b) is fixedly connected on the fourth trochanter dish (22).
2. permanent-magnet speed governor according to claim 1, it is characterized in that, described speed adjusting gear (5) comprises a bearing pedestal (6) and a sliding outer cover (51), be provided with bearing between described bearing pedestal (6) and second (200), the external cylindrical surface of described bearing pedestal (6) is provided with helicla flute (61), the lower end of described sliding outer cover (51) is enclosed within on the bearing pedestal (6), sliding outer cover (51) is gone up fixedly roller (52) and swing arm (53), described roller (52) inserts in the helicla flute (61) of bearing pedestal, described swing arm (53) is connected with an electric actuator (7), and the upper end of described sliding outer cover (51) is enclosed within second (200) slidably and upward and by bearing is connected with fourth trochanter dish (22).
3. permanent-magnet speed governor according to claim 1 is characterized in that, the first rotor dish (11) on the described external rotor (1) is conductor disc, and second rotor disk (12) is the permanent magnetism dish; Third trochanter dish (21) on the described internal rotor (2) is the permanent magnetism dish, and fourth trochanter dish (22) is conductor disc.
4. permanent-magnet speed governor according to claim 3 is characterized in that, described the first rotor dish (11) back side is provided with fin (15).
5. permanent-magnet speed governor according to claim 1, it is characterized in that, connect into cage structure by polylith air gap plate (13) between the first rotor dish (11) on the described external rotor (1) and second rotor disk (12), also be provided with the wind blade of along the circumferential direction arranging (14) between adjacent two blocks of air gap plates (13).
6. permanent-magnet speed governor according to claim 2, it is characterized in that, also comprise an outer cylinder (8), described external rotor (1), internal rotor (2) all are positioned at outer cylinder (8) with speed adjusting gear (5), described electric actuator (7) is fixedly mounted on barrel (81) outside of outer cylinder, and electric actuator (7) is connected with described swing arm (53) by a connecting rod (9) that passes described barrel (81).
7. permanent-magnet speed governor according to claim 6 is characterized in that, described bearing pedestal (6) is fixed on the base plate (82) of outer cylinder.
8. permanent-magnet speed governor according to claim 6 is characterized in that, has a plurality of inspection holes (83) on the barrel of described outer cylinder (81), and mesh plate is installed in the inspection hole (83); On the inwall of outer cylinder (8), inspection hole around polylith wind deflector (85) is installed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310217557.6A CN103312117B (en) | 2013-06-04 | 2013-06-04 | Permanent-magnet speed governor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310217557.6A CN103312117B (en) | 2013-06-04 | 2013-06-04 | Permanent-magnet speed governor |
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| CN103312117A true CN103312117A (en) | 2013-09-18 |
| CN103312117B CN103312117B (en) | 2016-11-02 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202149A (en) * | 2015-07-17 | 2015-12-30 | 东莞市汇如涞电能科技有限公司 | Spiral magnetic pushing device |
| CN105406687A (en) * | 2015-11-26 | 2016-03-16 | 安徽沃弗电力科技有限公司 | Permanent magnet adjustable-speed motor |
| CN105634243A (en) * | 2015-07-08 | 2016-06-01 | 安徽沃弗电力科技有限公司 | Liquid-cooling type permanent magnet speed controller |
| CN106160405A (en) * | 2015-03-19 | 2016-11-23 | 李启飞 | T512/4 tandem type grooved cam electric speed regulation cartridge type magnetic coupling |
| CN106160403A (en) * | 2016-08-16 | 2016-11-23 | 迈格钠磁动力股份有限公司 | Vertical hot air cold mould permanent-magnet speed governor |
| CN106712449A (en) * | 2016-12-22 | 2017-05-24 | 安徽沃弗电力科技有限公司 | Air-cooled permanent magnet speed regulator |
| CN107546954A (en) * | 2017-10-17 | 2018-01-05 | 上海市东方海事工程技术有限公司 | A kind of single permanent magnetic disk permanent-magnet speed governor |
| CN108880101A (en) * | 2018-06-28 | 2018-11-23 | 南京艾凌节能技术有限公司 | A kind of radiator structure of permanent-magnet speed governor |
| CN110176849A (en) * | 2019-06-14 | 2019-08-27 | 安徽沃弗电力科技有限公司 | A kind of single side transmission air-cooled permanent-magnet speed governor |
| CN113872415A (en) * | 2021-11-03 | 2021-12-31 | 大庆恒驰电气有限公司 | Permanent-magnet energy-saving asynchronous motor |
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| CN201478985U (en) * | 2009-08-11 | 2010-05-19 | 余亚莉 | Barrel-type permanent magnet coupling shaft coupler capable of adjusting air-gap magnetic field coupling distances and areas |
| CN101800465A (en) * | 2010-04-02 | 2010-08-11 | 王荣松 | Permanent magnet speed governor |
| WO2013009903A2 (en) * | 2011-07-12 | 2013-01-17 | MaxForce Energy Technologies Co., Ltd. | Magnetic coupler |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160405A (en) * | 2015-03-19 | 2016-11-23 | 李启飞 | T512/4 tandem type grooved cam electric speed regulation cartridge type magnetic coupling |
| CN105634243A (en) * | 2015-07-08 | 2016-06-01 | 安徽沃弗电力科技有限公司 | Liquid-cooling type permanent magnet speed controller |
| CN105202149A (en) * | 2015-07-17 | 2015-12-30 | 东莞市汇如涞电能科技有限公司 | Spiral magnetic pushing device |
| CN105406687A (en) * | 2015-11-26 | 2016-03-16 | 安徽沃弗电力科技有限公司 | Permanent magnet adjustable-speed motor |
| CN106160403A (en) * | 2016-08-16 | 2016-11-23 | 迈格钠磁动力股份有限公司 | Vertical hot air cold mould permanent-magnet speed governor |
| CN106712449A (en) * | 2016-12-22 | 2017-05-24 | 安徽沃弗电力科技有限公司 | Air-cooled permanent magnet speed regulator |
| CN107546954A (en) * | 2017-10-17 | 2018-01-05 | 上海市东方海事工程技术有限公司 | A kind of single permanent magnetic disk permanent-magnet speed governor |
| CN107546954B (en) * | 2017-10-17 | 2024-02-06 | 上海市东方海事工程技术有限公司 | Single permanent magnet disk permanent magnet speed regulator |
| CN108880101A (en) * | 2018-06-28 | 2018-11-23 | 南京艾凌节能技术有限公司 | A kind of radiator structure of permanent-magnet speed governor |
| CN108880101B (en) * | 2018-06-28 | 2020-11-20 | 南京艾凌节能技术有限公司 | Heat radiation structure of permanent magnet speed regulator |
| CN110176849A (en) * | 2019-06-14 | 2019-08-27 | 安徽沃弗电力科技有限公司 | A kind of single side transmission air-cooled permanent-magnet speed governor |
| CN110176849B (en) * | 2019-06-14 | 2024-01-26 | 安徽沃弗永磁科技有限公司 | Single-face transmission air-cooled permanent magnet speed regulator |
| CN113872415A (en) * | 2021-11-03 | 2021-12-31 | 大庆恒驰电气有限公司 | Permanent-magnet energy-saving asynchronous motor |
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| CN103312117B (en) | 2016-11-02 |
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