CN212627369U - Permanent magnet motor rotor and permanent magnet motor comprising same - Google Patents
Permanent magnet motor rotor and permanent magnet motor comprising same Download PDFInfo
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- CN212627369U CN212627369U CN202021766116.3U CN202021766116U CN212627369U CN 212627369 U CN212627369 U CN 212627369U CN 202021766116 U CN202021766116 U CN 202021766116U CN 212627369 U CN212627369 U CN 212627369U
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Abstract
The utility model discloses a permanent-magnet machine rotor reaches permanent-magnet machine including it belongs to the motor field, and the rotor includes first magnetic pole iron core and second magnetic pole iron core, wherein: the first magnetic pole iron core comprises a first rotor iron core and a first permanent magnet annularly attached to the periphery of the first rotor iron core, the first rotor iron core is provided with a first positioning polygonal hole, and the first permanent magnet is formed by splicing a first positioning magnetic steel and a plurality of magnetic steels; the magnetic steel splicing modes of the second magnetic pole iron core and the first magnetic pole iron core are almost the same; the first magnetic pole iron core and the second magnetic pole iron core are correspondingly assembled through the first positioning polygonal hole and the second positioning polygonal hole in a positioning mode, and the magnetic steels corresponding to the first permanent magnet and the second permanent magnet are staggered by an angle of an oblique pole. The utility model realizes the rotor segment oblique pole through the positioning hexagon of the rotor core, the positioning magnetic steel (big N) and the uniform magnetic steel assembling direction; compared with the continuous oblique poles of the permanent magnet rotor, the rotor sectional oblique poles have low cost and are suitable for mass production.
Description
Technical Field
The utility model relates to a wind turbine generator system motor field especially relates to a permanent-magnet machine rotor reaches permanent-magnet machine including it.
Background
With the rapid development of wind power generation technology, wind turbine generators are developing from constant speed and constant frequency to variable speed and constant frequency and from fixed pitch to variable pitch. The variable pitch wind turbine generator has become the mainstream model of the current wind turbine generator due to the advantages of capability of capturing wind energy to the maximum extent, stable output power, small stress of the generator and the like.
The pitch control mode can be generally divided into two modes, one mode is a motor actuating mechanism, and the other mode is a hydraulic actuating mechanism;
the motor variable pitch actuating mechanism utilizes the motor to independently control the blades, and is favored by a plurality of manufacturers because the mechanism is compact and reliable, the transmission structure is not relatively complex like a hydraulic variable pitch mechanism, nonlinearity exists, and leakage and jamming occur. But the dynamic characteristic is relatively poor, and the inertia is large, particularly for a high-power wind turbine. And if the motor adjusts the blade continuously and frequently, the excessive heat load is generated to damage the motor.
The use requirement of the wind power variable pitch motor is as follows: the power density is high, the response time is short, the extremely high power density and the weak magnetic capacity of the motor provide a larger speed torque range, and dynamic and reliable variable pitch control can be ensured even when a power failure occurs; long service life and low maintenance requirement.
The variable pitch motor of the early direct current variable pitch system adopts a direct current motor, and the direct current motor is convenient to regulate voltage and speed, but has the advantages of complex structure, heavy volume, low power density, low efficiency and large rotational inertia; the carbon brush reversing mechanism influences the operation reliability of the motor and increases the operation and maintenance workload of the motor;
the medium-term alternating current variable pitch system adopts a common alternating current squirrel cage asynchronous motor. The alternating-current squirrel-cage asynchronous variable-pitch motor is simple in structure, convenient to adjust speed and high in reliability due to brushless speed adjustment; however, the squirrel-cage asynchronous motor also has the problems of low efficiency, low power factor and heavy volume; the motor continuously and frequently changes the propeller, the starting current of the motor is large, the motor generates excessive heat load, the temperature of the motor is increased, and the motor is damaged.
The alternating-current synchronous permanent magnet variable pitch motor gradually replaces an alternating-current asynchronous variable pitch motor, and has the advantages of high power density, high power factor, small starting current, wide speed regulation range, small rotational inertia and short response time; the alternating-current permanent magnet variable-pitch motor has no carbon brush, no abrasion, no maintenance basically, low maintenance requirement and long service life.
The alternating current synchronous permanent magnet variable pitch motor belongs to a high-precision servo motor; due to the influence of the cogging effect and the non-sine magnetic field of the permanent magnet motor, the permanent magnet motor is usually accompanied by larger tooth harmonic potential, tooth-space torque and torque pulsation, and the control precision of the permanent magnet motor is greatly influenced.
The alternating current synchronous pitch control technology is gradually applied to a pitch control system of a wind turbine. The alternating-current permanent magnet variable-pitch motor matched with the alternating-current synchronous variable-pitch motor has the advantages of high power density, high power factor, small starting current, small running current, wide speed regulation range, small rotational inertia and short response time; meanwhile, the permanent magnet variable pitch motor runs in a brushless mode, is basically maintenance-free, and is low in maintenance requirement and long in service life.
However, permanent magnet motors have inherent problems: due to the influence of the cogging effect and the non-sine magnetic field of the permanent magnet motor, the permanent magnet motor is usually accompanied by larger tooth harmonic potential, tooth-space torque and torque pulsation, and the control precision of the permanent magnet motor is greatly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a permanent magnet motor rotor and a permanent magnet motor comprising the same are provided, the utility model realizes the rotor segmented oblique pole through the positioning hexagon of the rotor core, the positioning magnetic steel (big N) and the uniform magnetic steel assembling direction; compared with the continuous oblique poles of the permanent magnet rotor, the rotor sectional oblique poles have low cost and are suitable for mass production. The rotor is divided into oblique poles, so that the tooth harmonic wave is effectively weakened, the tooth space torque and the torque fluctuation of the permanent magnet variable pitch motor are reduced, the inherent defects of the permanent magnet motor are overcome, and the control precision is improved.
In order to solve the technical problem, the utility model provides a technical scheme as follows:
in one aspect, the utility model provides a permanent magnet motor rotor, including sectional type magnetic pole iron core, sectional type magnetic pole iron core includes first magnetic pole iron core and second magnetic pole iron core, wherein:
the first magnetic pole iron core comprises a first rotor iron core and a first permanent magnet annularly adhered to the periphery of the first rotor iron core, the first rotor iron core is provided with a first positioning polygonal hole, the first permanent magnet is formed by splicing a first positioning magnetic steel and a plurality of magnetic steels, the first positioning magnetic steel is an N-pole magnetic steel, the radians of the magnetic steels of the first permanent magnet are the same and different from the radians of the first positioning magnetic steel, and the first positioning magnetic steel is sequentially assembled from the beginning, and sequentially comprises an S-pole magnetic steel, an N-pole magnetic steel and an S-pole magnetic steel; the gap between the last S-pole magnetic steel and the first positioning magnetic steel is filled with glue; confirming the assembling position of the first positioning magnetic steel through the position of the first positioning polygonal hole;
the second magnetic pole iron core comprises a second rotor iron core and a second permanent magnet annularly attached to the periphery of the second rotor iron core, and a second positioning polygonal hole is formed in the second rotor iron core; the second permanent magnet is formed by splicing a second positioning magnetic steel and a plurality of magnetic steels, the second positioning magnetic steel is an N-pole magnetic steel, the radians of the magnetic steels of the second permanent magnet are the same and different from those of the second positioning magnetic steel, and the second positioning magnetic steel is sequentially assembled from the second positioning magnetic steel, namely an S-pole magnetic steel, an N-pole magnetic steel and an S-pole magnetic steel; the gap between the last S-pole magnetic steel and the second positioning magnetic steel is filled with glue; confirming the assembling position of the second positioning magnetic steel through the position of the second positioning polygonal hole;
the first magnetic pole iron core and the second magnetic pole iron core are correspondingly assembled through the first positioning polygonal hole and the second positioning polygonal hole in a positioning mode, so that the first positioning magnetic steel and the second positioning magnetic steel are circumferentially different by 180 degrees, and the magnetic steels corresponding to the first permanent magnet and the second permanent magnet are staggered by an angle of an oblique pole.
Furthermore, the quantity of the splicing magnetic steels of the first permanent magnet and the second permanent magnet is the same, and the specifications of the first positioning magnetic steel and the second positioning magnetic steel are the same.
Furthermore, between first permanent magnet and the first rotor core, between second permanent magnet and the second rotor core all there is the glue of loctite.
Furthermore, the first polygonal positioning hole and the second polygonal positioning hole are hexagonal holes and are in the direction of a key groove of the rotor rotating shaft.
Further, the segment type pole core comprises a plurality of segments of pole cores formed by assembling a first pole core and a second pole core.
Further, still include the magnet steel guard shield, be used for the suit at first magnetic pole iron core or second magnetic pole iron core tip and mark.
Further, still include balanced clamping ring and balanced daub, balanced clamping ring is used for installing at sectional type magnetic pole iron core both ends, balanced daub is used for proofreading dynamic balance.
In another aspect, a permanent magnet motor is provided, which comprises the permanent magnet motor rotor.
Further, the rear-mounted permanent magnet variable pitch motor is a brake, and further comprises a rotor assembly and a stator;
the rotor assembly comprises a lining, a front end cover, a sealing ring, a front bearing inner cover and a screw, wherein a magnetic pole iron core of the permanent magnet motor rotor is sequentially arranged in the bearing inner cover, the front bearing and the lining; the front end cover is sleeved on the front bearing, and a sealing ring is arranged on the inner ring of the front end cover; the front end cover and the front bearing inner cover are fixedly connected through screws; a rear bearing, a key and an external spline are sequentially arranged on a magnetic pole iron core of the permanent magnet motor rotor;
the stator comprises a front engine base, a rear end cover, a rear engine base, a rear cover plate, an electric safety brake, a rotary variable baffle and a gasket;
the front base of the stator is fastened and connected with the front end cover assembled by the rotor through a screw and a gasket; the rear end cover is sleeved on the rotor assembly rear bearing; the front engine base and the rear end cover, the rear end cover and the rear engine base, and the rear engine base and the rear cover plate are matched through rabbets and are fixedly connected with the gasket through screws; the electric safety brake is sleeved on an external spline sleeve in rotor assembly and tightly attached to the side surface of the rear end cover, and is sealed and protected by the rear base and the rear cover plate; the rotary change baffle is sleeved on a rotating shaft assembled by the rotor and is fixed on the side surface of the electric safety brake through a screw and a gasket.
Further, still include sealing washer, hoist and mount board, wave spring piece, industry aviation plug, become shielded cable soon, resolver, adjusting shim, change cover, screw, change retaining ring soon, change packing ring soon and the axle stretch cover soon, wherein:
the rotary variable baffle ring is fixedly connected with the rotary variable baffle through a screw and a gasket; an adjusting gasket is arranged on the inner side of the rotary transformer to adjust the axial clearance of the rotor of the rotary transformer; after the rotating shaft corner of the rotor assembly of the rotary transformer and the rotor is determined, a rotary transformer bushing arranged on the outer side of the rotary transformer is fixedly connected with the rotating shaft of the rotor assembly through a screw; the hoisting plates are fixedly arranged on two sides of a front base of the stator assembly; the industrial aviation plug is arranged on a rear base assembled by the stator through a screw and a gasket and is a wiring plug of the electromagnetic safety brake; the aviation plug is fixedly arranged on a rear base of the stator assembly through a screw and a gasket; a rotary transformer shielding cable led out from the rotary transformer is connected with a plug connector of the industrial aviation plug; sealing rings are arranged at the matching surface position of the front end cover assembled by the rotor and the front base of the stator, the matching position of the rear end cover assembled by the stator and the front base, the matching position of the rear end cover assembled by the rear base and the stator and the matching position of the rear cover plate assembled by the stator and the rear base.
After adopting such design, the utility model discloses following advantage has at least:
(1) the utility model realizes the rotor segment oblique pole through the positioning hexagon of the rotor core, the positioning magnetic steel (big N) and the uniform magnetic steel assembling direction; compared with the continuous oblique poles of the permanent magnet rotor, the rotor sectional oblique poles have low cost and are suitable for mass production. The rotor is divided into oblique poles, so that the tooth harmonic wave is effectively weakened, the tooth space torque and the torque fluctuation of the permanent magnet variable pitch motor are reduced, the inherent defects of the permanent magnet motor are overcome, and the control precision is improved.
(2) The utility model discloses a permanent magnetism becomes oar motor has overcome direct current series excitation and has become the respective shortcoming of oar and exchange asynchronous oar, has that power density is high, operating current is little, the speed governing scope is wide, inertia is little, the response is quick a bit, brushless change oar, efficient, temperature rise low, the maintenance-free basically simultaneously, has greatly improved the reliability and the life who becomes the oar motor.
(3) The utility model discloses a permanent magnetism becomes reliability, safe operation and the high control accuracy of oar motor, guaranteed the safe and reliable operation of fan change oar system, also guaranteed the safe and reliable operation of fan exactly.
(4) The electromagnetic safety brake of the utility model is arranged outside the rear end cover of the permanent magnet pitch-variable motor, adopts a rear-mounted structure of the brake, and has small volume and compact structure; and the maintenance is convenient.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is a schematic structural diagram of a first magnetic pole core of the present invention, in which (a) is a schematic end view, and (B) is a side view of the first magnetic pole core mounted with a magnetic steel shield;
fig. 2 is a schematic structural view of a second magnetic pole core according to the present invention, wherein (a) is a schematic end view, and (B) is a side view of the second magnetic pole core mounted with a magnetic steel shield;
fig. 3 is an assembly view of a rotor core of a rear permanent magnet motor according to the present invention;
fig. 4 is a schematic diagram of the general structure of a brake rear permanent magnet motor according to the present invention;
fig. 5 is the general structure diagram of the brake postposition type permanent magnet pitch-variable motor of the utility model.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The utility model provides an embodiment of permanent-magnet machine rotor, as shown in fig. 1 to 5, including sectional type pole core, sectional type pole core includes first pole core A and second pole core B, wherein:
the first magnetic pole iron core A comprises a first rotor iron core A02 and a first permanent magnet which is annularly pasted on the periphery of the first rotor iron core A02, a first positioning polygonal hole A7 is formed in the first rotor iron core A02, the first permanent magnet is formed by splicing a first positioning magnetic steel A03 and a plurality of magnetic steels, the first positioning magnetic steel A03 is N-pole magnetic steel, the radians of the magnetic steels of the first permanent magnet are the same and different from the radians of a first positioning magnetic steel A03, and can be larger than the radians of other magnetic steels, and the first positioning magnetic steel A03 is used as a starting material to be sequentially assembled, namely S-pole magnetic steel A04, N-pole magnetic steel A01 and S-pole magnetic steel; the gap between the last S-pole magnetic steel and the first positioning magnetic steel A03 is filled with the loctite glue A06; the assembling position of the first positioning magnetic steel A03 is confirmed through the position of the first positioning polygonal hole A7;
the second magnetic pole iron core B comprises a second rotor iron core B04 and a second permanent magnet annularly attached to the periphery of the second rotor iron core B04, and a second positioning polygonal hole B7 is formed in the second rotor iron core B04; the second permanent magnet is formed by splicing a second positioning magnetic steel B01 and a plurality of magnetic steels, the second positioning magnetic steel B01 is an N-pole magnetic steel, the radians of the magnetic steels of the second permanent magnet are the same and different from those of the second positioning magnetic steel B01, and can be larger than those of other magnetic steels, and the second positioning magnetic steel B01 is used as the first positioning magnetic steel to be sequentially assembled, namely S-pole magnetic steel B02, N-pole magnetic steel B03. The gap between the last S-pole magnetic steel and the second positioning magnetic steel B01 is filled with the loctite glue B06; the assembling position of the second positioning magnetic steel B01 is confirmed through the position of a second positioning polygonal hole B7;
the first magnetic pole iron core A and the second magnetic pole iron core B are positioned and correspondingly assembled through a first positioning polygonal hole A7 and a second positioning polygonal hole B7, so that the circumferential difference between first positioning magnetic steel A03 and second positioning magnetic steel B01 is 180 degrees, and the magnetic steels corresponding to the first permanent magnet and the second permanent magnet are staggered by an angle of an oblique pole. The fitting hole B8 in fig. 2 is for insert bolt fitting.
The utility model discloses a magnet steel concatenation mode of first permanent magnet and second permanent magnet is almost the same, and the join in marriage dress position difference that mainly lies in first location magnet steel, first location magnet steel is different. During the assembling process, the components are assembled along the same direction. The utility model realizes the rotor segment oblique pole through the positioning hexagon of the rotor core, the positioning magnetic steel (big N) and the uniform magnetic steel assembling direction; compared with the continuous oblique poles of the permanent magnet rotor, the rotor sectional oblique poles have low cost and are suitable for mass production. The rotor is divided into oblique poles, so that the tooth harmonic wave is effectively weakened, the tooth space torque and the torque fluctuation of the permanent magnet variable pitch motor are reduced, the inherent defects of the permanent magnet motor are overcome, and the control precision is improved.
Further, the number of the splicing magnetic steels of the first permanent magnet and the second permanent magnet is the same, and the splicing magnetic steels can be 8 or other numbers, and the specifications of the first positioning magnetic steel A03 and the second positioning magnetic steel B01 are the same.
Furthermore, the loctite glue is adhered between the first permanent magnet and the first rotor core a02 and between the second permanent magnet and the second rotor core.
Furthermore, the first polygonal positioning hole and the second polygonal positioning hole are hexagonal holes and are in the direction of a key groove of the rotor rotating shaft.
Further, the segment type pole core includes a plurality of segments of pole cores assembled by the first pole core and the second pole core B.
Further, still include the magnet steel guard shield, be used for the suit at first magnetic pole iron core or second magnetic pole iron core B tip and mark.
Further, still include balanced clamping ring and balanced daub, balanced clamping ring is used for installing at sectional type magnetic pole iron core both ends, and balanced daub is used for proofreading dynamic balance.
The utility model discloses an it is to join in marriage dress embodiment:
first rotor pole a: a positioning hexagonal hole is formed in the first rotor iron core A02; in the assembling process of the segmented rotor pole core A, firstly, the position of first positioning magnetic steel (big N) A03 is confirmed; coating a thin layer of loctite glue A06 on the binding surface of the magnetic steel, alternately bonding first positioning magnetic steel (large N) A03, S-pole magnetic steel A04 and N-pole magnetic steel (the magnetic steels can be at the same interval) on a first rotor iron core A02, assembling along the same direction, and accumulating the gap between the magnetic steel and the magnetic steel to the position between the last S-pole magnetic steel and the first positioning magnetic steel (large N) A03; after the magnetic steels are completely assembled, filling gaps between the magnetic steels in the axial direction with a loctite adhesive A06; firstly, pressing a magnetic steel shield A05 at one end; n, S polarity marks are made on the circumferential surface of the magnetic steel shield A05 by a marker pen; then, the other end of the magnetic steel shield A05 is pressed in, and the circumference surface is marked with a marker A.
A positioning hexagonal hole is formed in the second rotor iron core B04; in the assembling process of the segmented rotor pole core B, the position of the second positioning magnetic steel (large N) B01 is confirmed first; coating a thin layer of loctite adhesive B06 on the binding surface of the magnetic steel, bonding second positioning magnetic steel (large N) B01 and S-pole magnetic steel alternately on a second rotor core B04, assembling along the same direction, and accumulating the gap between the magnetic steel and the magnetic steel to the space between the last S-pole magnetic steel and the second positioning magnetic steel (large N) B01; after the magnetic steels are completely assembled, filling gaps between the magnetic steels in the axial direction with loctite glue; firstly, pressing a magnetic steel shield B05 at one end; n, S polarity marks are made on the circumferential surface of the shield by a marker pen; the other end shield B05 was pressed in and marked "B" on the circumference.
Please refer to fig. 1, fig. 2, and fig. 3. The assembly positions of the first positioning magnetic steel (big N) A03 of the magnetic pole core A and the second positioning magnetic steel (big) B01 of the second magnetic pole core B are different, and the circumferential phase difference is 180 degrees. The first magnetic pole iron core a and the second magnetic pole iron core B are respectively provided with a magnetic steel which is staggered with an oblique pole by an angle of 9 degrees (4.5 degrees +4.5 degrees).
Referring to fig. 3, the rotor core assembly mainly includes: the rotor comprises a rotating shaft 101, a balance compression ring 102, a rotor core A103, a rotor core B104, a balance compression ring 105, balance cement 106 and a thin gasket 107.
The rotor magnetic pole iron core is of a segmented magnetic pole iron core structure and is four segments, namely a rotor iron core A103, a rotor iron core B104, a rotor iron core A103 and a rotor iron core B104; when the rotor core A103 and the rotor core B104 are assembled, the positioning hexagons are aligned, and the hexagonal holes are opposite to the keyways on the shaft; when the pole core A103 and the pole core B104 are assembled, the assembly sequence is required; after the rotor is assembled, the balance is calibrated and adjusted by the balance plaster 106.
The four-section segmented pole core A, the pole core B, the pole core A and the pole core B are assembled in sequence and aligned, and the effect of the motor rotor oblique pole is achieved.
Referring to fig. 4, fig. 4 is an assembly view of a rotor of a rear-mounted permanent magnet pitch motor of a brake. The rotor assembly drawing mainly includes: a rotor 1-0 and a bushing 1-1; the bearing comprises a front end cover 1-2, a sealing ring 1-3, a front bearing 1-4, a front bearing inner cover 1-5, a screw 1-6, a rear bearing 1-7, a key 1-8 and an outer spline housing 1-9.
Firstly, mounting an inner bearing cover 1-5 on a rotor 1-0, and then sequentially pressing a front bearing 1-4 and a bush 1-1; the front end cover 1-2 is sleeved on the front bearing 1-4, and the sealing ring 1-3 is pressed in the inner ring of the front end cover 1-2; the front end cover 1-2 is fixedly connected with the front bearing inner cover 1-5 by screws 1-6; the rear bearings 1-7 are pressed in place; the keys 1-8 are installed and the external splines 1-9 are pressed in.
Referring to fig. 5, fig. 5 is a general structure diagram of a rear-mounted brake permanent magnet pitch motor.
The general structure of the rear-mounted permanent magnet variable pitch motor of the brake mainly comprises: the rotor assembly comprises a rotor assembly 1, a screw 2, a gasket 3, an O-shaped sealing ring 4, a stator 5, a hoisting plate 6, a rear end cover 7, a corrugated spring piece 8, an industrial aviation plug 9, a screw 10, a gasket 11, an industrial aviation plug 12, a screw 13, a gasket 14, a rear cover plate 15, a screw 16, a gasket 17, a rotary transformer shielding cable 18, a rotary transformer 19, an adjusting gasket 20, a screw 21, a rotary transformer sleeve 22, a screw 23, a rotary transformer retainer ring 24, a rotary transformer gasket 25, a rotary transformer retainer plate 26, a screw 27, a gasket 28, an electromagnetic safety brake 29, a key 30 and a shaft extension sleeve 31.
Referring to fig. 1-5, a front base of a stator 5 is fastened and connected with a front end cover 1-2 of a rotor assembly 1 through a screw 2 and a gasket 3; the rear end cover 7 is sleeved on the rotor assembly rear bearings 1-7; the front engine base and the rear end cover 7 of the stator 1-5, the rear end cover 7 and the rear engine base, and the rear engine base and the rear cover plate 15 are matched through rabbets and are fastened and connected with a gasket 17 through a screw 16; the electric safety brake 29 is sleeved on the external spline housing 1-9 in the rotor assembly 1; clinging to the side surface of the rear end cover 7; the rotary change baffle is sleeved on the rotating shaft 101 of the rotor assembly 1 and is fixed on the side surface of the electric safety brake 29 through a screw 27 and a gasket 28; a rotation change retainer ring 24 is arranged between the rotation change baffle 26 and the rotary transformer 19; the rotary change retainer ring 23 is fixedly connected with the rotary change baffle plate 26 through a screw 22 and a gasket 23; an adjusting gasket 20 is arranged on the inner side of the rotary transformer 19 to adjust the axial clearance of the rotor of the rotary transformer 19; after the rotor of the rotary transformer 19 and the rotating shaft 101 of the rotor assembly 1 are determined, a rotary transformer sleeve arranged on the outer side of the rotary transformer 19 is fixedly connected with the rotating shaft 101 of the rotor assembly 1 through a screw 21; the hoisting plates 6 are fixedly arranged on two sides of the front base of the stator assembly 5; the industrial aviation plug 9 is arranged on the rear base of the stator assembly 5 through a screw 10 and a gasket 11 and is a wiring plug of an electromagnetic safety brake 29; the aviation plug 12 is fixedly arranged on a rear engine base of the stator assembly 5 through a screw 13 and a gasket 14; a rotary transformer shielding cable 18 led out from the rotary transformer 19 is connected with a plug connector of the industrial aviation plug 12; an O-shaped sealing ring 4 is arranged at the matching surface position of a front end cover of the rotor assembly 1 and a front machine base of the stator 1, the matching position of a rear end cover and a front machine base of the stator assembly 1, the matching position of the rear end cover and a rear machine base of the stator assembly 1 and the matching position of a rear cover plate 15 and the rear machine base of the stator assembly 1, so that the motor is ensured to reach IP protection level IP 67.
The rotor structure of the permanent magnet motor and the special wind power variable pitch permanent magnet motor comprising the rotor structure have the following advantages:
1. the rotor segmented oblique poles are realized through the positioning hexagon of the rotor core, the positioning magnetic steel (big N) and the uniform magnetic steel assembling direction; compared with the continuous oblique poles of the permanent magnet rotor, the rotor sectional oblique poles have low cost and are suitable for mass production.
2. The rotor indexing oblique pole effectively weakens the tooth harmonic wave, reduces the tooth space torque and the torque fluctuation of the permanent magnet variable pitch motor, overcomes the inherent defects of the permanent magnet motor and improves the control precision.
3. The permanent magnet variable pitch motor overcomes the respective defects of direct current series excitation variable pitch and alternating current asynchronous variable pitch, has the advantages of high power density, small running current, wide speed regulation range, small rotational inertia and quick response, is brushless and variable pitch, has high efficiency and low temperature rise, is basically maintenance-free, and greatly improves the reliability and the service life of a variable pitch motor.
4. The reliability, safe operation and high control precision of the permanent magnet variable pitch motor ensure the safe and reliable operation of a fan variable pitch system, namely the safe and reliable operation of the fan.
5. The electromagnetic safety brake is arranged on the outer side of the rear end cover of the permanent magnet variable pitch motor, and a rear brake structure is adopted, so that the motor is small in size and compact in structure; and the maintenance is convenient.
The above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and those skilled in the art can make various modifications, equivalent changes and modifications using the above-described technical content, all of which fall within the scope of the present invention.
Claims (10)
1. A permanent magnet electric machine rotor comprising a segmented pole core comprising a first pole core and a second pole core, wherein:
the first magnetic pole iron core comprises a first rotor iron core and a first permanent magnet annularly adhered to the periphery of the first rotor iron core, the first rotor iron core is provided with a first positioning polygonal hole, the first permanent magnet is formed by splicing a first positioning magnetic steel and a plurality of magnetic steels, the first positioning magnetic steel is an N-pole magnetic steel, the radians of the magnetic steels of the first permanent magnet are the same and different from the radians of the first positioning magnetic steel, and the first positioning magnetic steel is sequentially assembled from the beginning, and sequentially comprises an S-pole magnetic steel, an N-pole magnetic steel and an S-pole magnetic steel; the gap between the last S-pole magnetic steel and the first positioning magnetic steel is filled with glue; confirming the assembling position of the first positioning magnetic steel through the position of the first positioning polygonal hole;
the second magnetic pole iron core comprises a second rotor iron core and a second permanent magnet annularly attached to the periphery of the second rotor iron core, and a second positioning polygonal hole is formed in the second rotor iron core; the second permanent magnet is formed by splicing a second positioning magnetic steel and a plurality of magnetic steels, the second positioning magnetic steel is an N-pole magnetic steel, the radians of the magnetic steels of the second permanent magnet are the same and different from those of the second positioning magnetic steel, and the second positioning magnetic steel is sequentially assembled from the second positioning magnetic steel, namely an S-pole magnetic steel, an N-pole magnetic steel and an S-pole magnetic steel; the gap between the last S-pole magnetic steel and the second positioning magnetic steel is filled with glue; confirming the assembling position of the second positioning magnetic steel through the position of the second positioning polygonal hole;
the first magnetic pole iron core and the second magnetic pole iron core are correspondingly assembled through the first positioning polygonal hole and the second positioning polygonal hole in a positioning mode, so that the first positioning magnetic steel and the second positioning magnetic steel are circumferentially different by 180 degrees, and the magnetic steels corresponding to the first permanent magnet and the second permanent magnet are staggered by an angle of an oblique pole.
2. The rotor of claim 1, wherein the first and second permanent magnets have the same number of spliced magnetic steels, and the first and second positioning magnetic steels have the same size.
3. The permanent magnet electric machine rotor of claim 1, wherein loctite glue is adhered between the first permanent magnet and the first rotor core and between the second permanent magnet and the second rotor core.
4. The rotor of claim 1, wherein the first and second polygonal positioning holes are hexagonal holes and aligned with the keyways of the rotor shaft.
5. The permanent magnet electric machine rotor of claim 1 wherein said segmented pole core comprises a plurality of pole cores assembled from a first pole core and a second pole core.
6. The rotor of any one of claims 1 to 5, further comprising a magnetic steel shield for fitting over an end of the first or second pole core and marking.
7. The permanent magnet motor rotor according to any one of claims 1 to 5, further comprising a balance compression ring and balance mortar, wherein the balance compression ring is used for being installed at two ends of the segmented pole core, and the balance mortar is used for correcting dynamic balance.
8. A permanent magnet electric motor comprising a permanent magnet machine rotor according to any of claims 1 to 7.
9. The permanent magnet motor according to claim 8, being a brake-rear mounted permanent magnet pitch motor, further comprising a rotor assembly and a stator;
the rotor assembly comprises a lining, a front end cover, a sealing ring, a front bearing inner cover and a screw, wherein a magnetic pole iron core of the permanent magnet motor rotor is sequentially arranged in the bearing inner cover, the front bearing and the lining; the front end cover is sleeved on the front bearing, and a sealing ring is arranged on the inner ring of the front end cover; the front end cover and the front bearing inner cover are fixedly connected through screws; a rear bearing, a key and an external spline are sequentially arranged on a magnetic pole iron core of the permanent magnet motor rotor;
the stator comprises a front engine base, a rear end cover, a rear engine base, a rear cover plate, an electric safety brake, a rotary variable baffle and a gasket;
the front base of the stator is fastened and connected with the front end cover assembled by the rotor through a screw and a gasket; the rear end cover is sleeved on the rotor assembly rear bearing; the front engine base and the rear end cover, the rear end cover and the rear engine base, and the rear engine base and the rear cover plate are matched through rabbets and are fixedly connected with the gasket through screws; the electric safety brake is sleeved on an external spline sleeve in rotor assembly and tightly attached to the side surface of the rear end cover, and is sealed and protected by the rear base and the rear cover plate; the rotary change baffle is sleeved on a rotating shaft assembled by the rotor and is fixed on the side surface of the electric safety brake through a screw and a gasket.
10. The permanent magnet motor according to claim 9, further comprising a seal ring, a lifting plate, a wave spring plate, an industrial aviation plug, a rotary transformer shielded cable, a rotary transformer, an adjusting gasket, a rotary transformer bushing, a screw, a rotary transformer retainer ring, a rotary transformer washer, and a shaft extension bushing, wherein:
the rotary variable baffle ring is fixedly connected with the rotary variable baffle through a screw and a gasket; an adjusting gasket is arranged on the inner side of the rotary transformer to adjust the axial clearance of the rotor of the rotary transformer; after the rotating shaft corner of the rotor assembly of the rotary transformer and the rotor is determined, a rotary transformer bushing arranged on the outer side of the rotary transformer is fixedly connected with the rotating shaft of the rotor assembly through a screw; the hoisting plates are fixedly arranged on two sides of a front base of the stator assembly; the industrial aviation plug is arranged on a rear base assembled by the stator through a screw and a gasket and is a wiring plug of the electromagnetic safety brake; the aviation plug is fixedly arranged on a rear base of the stator assembly through a screw and a gasket; a rotary transformer shielding cable led out from the rotary transformer is connected with a plug connector of the industrial aviation plug; sealing rings are arranged at the matching surface position of the front end cover assembled by the rotor and the front base of the stator, the matching position of the rear end cover assembled by the stator and the front base, the matching position of the rear end cover assembled by the rear base and the stator and the matching position of the rear cover plate assembled by the stator and the rear base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021766116.3U CN212627369U (en) | 2020-08-21 | 2020-08-21 | Permanent magnet motor rotor and permanent magnet motor comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021766116.3U CN212627369U (en) | 2020-08-21 | 2020-08-21 | Permanent magnet motor rotor and permanent magnet motor comprising same |
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| Publication Number | Publication Date |
|---|---|
| CN212627369U true CN212627369U (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021766116.3U Active CN212627369U (en) | 2020-08-21 | 2020-08-21 | Permanent magnet motor rotor and permanent magnet motor comprising same |
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| Country | Link |
|---|---|
| CN (1) | CN212627369U (en) |
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2020
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