CN202260856U - Radiating device of permanent magnet motor rotor - Google Patents

Radiating device of permanent magnet motor rotor Download PDF

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Publication number
CN202260856U
CN202260856U CN2011202816815U CN201120281681U CN202260856U CN 202260856 U CN202260856 U CN 202260856U CN 2011202816815 U CN2011202816815 U CN 2011202816815U CN 201120281681 U CN201120281681 U CN 201120281681U CN 202260856 U CN202260856 U CN 202260856U
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CN
China
Prior art keywords
rotor
permanent magnet
end plate
blade
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2011202816815U
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Chinese (zh)
Inventor
杨金霞
李益丰
何思源
辛本雨
刘春秀
王健
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Zhuzhou CRRC Times Electric Co Ltd
Original Assignee
Zhuzhou CSR Times Electric Co Ltd
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Priority to CN2011202816815U priority Critical patent/CN202260856U/en
Application granted granted Critical
Publication of CN202260856U publication Critical patent/CN202260856U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a radiating device of a permanent magnet motor rotor, which comprises a blade, a permanent magnet, a rotor and a rotor end plate. The rotor end plate comprises a rotor inner end plate and a rotor outer end plate, the permanent magnet is installed in a groove of the rotor, the rotor inner end plate and the rotor outer end plate are fixed to two ends of the rotor and sleeved on a revolving shaft of a motor together, and the blade is fixed on the rotor end plate. When the motor rotates, the blade is driven to rotate so as to take away the heat on the surface of the rotor. The radiating device of the permanent magnet motor rotor solves the technical problems that when the rotor rotates, an existing motor rotor radiating structure has no air flow on the surface basically and only depends on convection current between the radiating structure and a stator and a motor base for radiating, radiating capacity of the rotor is poor, especially under the condition that the motor is powered by an inverter, due to the increase of rotor loss, temperature rise of the rotor is caused by limited rotor radiating condition. Under the condition that the permanent magnet motor is powered by a variable frequency power supply, by means of improving the rotor radiating condition, the temperature rise of the rotor is reduced, and the operating reliability of the permanent magnet motor is improved greatly.

Description

A kind of permanent magnet machine rotor heat abstractor
Technical field
The utility model relates to a kind of heat abstractor of motor, especially relates to the permanent magnet machine rotor heat abstractor in a kind of electric traction field.
Background technology
Magneto is because efficient is high, loss is little, and the heat radiation of rotor is not generally increased cooling measure, only relies on convection current, conduction between the motor internal can reduce temperature of rotor.But the magneto that is applied to the electric traction field is by the variable frequency power supply powered; Owing to contain abundant harmonic components in the power supply; Cause the eddy current loss of permanent magnet in the permanent magnet machine rotor, the iron loss and the rotor stray loss of silicon steel sheet to increase greatly; Temperature of rotor sharply increases, and increases the risk of permanent magnet demagnetization, finally reduces the motor reliability of operation.
Permanent magnet motor has advantages such as High Power Factor, high efficiency and high power density and is widely used in the electric traction field with it.Because the permanent magnet machine rotor that inverter drives is only installed the permanent magnet that produces magnetic field, does not have the mouse cage winding.When supposing that stator input power supply is three-phase symmetrical sine voltage; When the motor steady operation; Because main flux is with rotor synchronous cutting stator; Produce any loss on the rotor permanent magnet hardly, the rotor only conduction of the convection current between dependence and stator and the support can be taken away heat, and temperature of rotor maintains lower level.
The magneto that is applied to the electric traction field contains in the stator winding and enriches time harmonic usually by the variable frequency power supply power supply.The harmonic field cutting rotor that time harmonic produces produces eddy current loss on permanent magnet, produce eddy current loss and magnetic hysteresis loss on the rotor silicon steel sheet.The rotor loss of extra increase, under original rotor radiating condition, temperature of rotor raises, and increases the risk of permanent magnet demagnetization, therefore, must improve the radiating condition of rotor, keeps rotor temperature rise a reasonable levels.
The rotor structure of existing inverter power supplied permanent magnet motor is following: rotor punching is packed into behind the permanent magnet, and be inserted on the axle after by the rotor end plates axial restraint at the punching two ends.The rotor end plates surface is smooth disk, and rotor when rotation, the surface does not have air current flow basically, and rotor is the heat loss through convection between dependence and stator and the support only, and the rotor heat-sinking capability is poor.Special motor is under the inverter power supply condition, because rotor loss increases, limited rotor radiating condition causes rotor temperature rise to increase.
In the prior art, in application on 01 09th, 2004, on 01 09th, 2005 bulletin, notification number were that the Chinese utility model patent of CN2672946 proposes a kind of magneto that has centrifugal radiator structure by the auspicious clock of woods.It utilizes the centrifugal force of rotor high-speed rotation generation through on rotor, being provided with air inlet and gas outlet, and centrifugal the distributing of heat that rotor is produced realized the centrifugal heat radiation of motor.
Apply on November 10th, 2005 by Jiangsu Sanjiang Electric Group Co.,Ltd, on 05 16th, 2007 bulletins, notification number is that the Chinese utility model patent of CN2901675 relates to the radiator structure that a kind of motor internal rotor has aerofoil fan.Aerofoil fan is made up of wheel hub, pressure face, the pressure back side, fan blade, is installed on the rotor.During machine operation, drive coupled aerofoil fan, fan is with the given speed rotation of motor, thereby in the certain pressure differential of the front and back of blade generation, the drive vane ambient air forms axial flow along the motor axial motion.Air-flow directly blows to winding overhang, reduces winding temperature rise.
Therefore, when rotor rotated, the surface did not have air current flow basically to the permanent magnet machine rotor radiator structure of prior art; Rotor is the heat loss through convection between dependence and stator and the support only, and the rotor heat-sinking capability is poor, and particularly motor is under the inverter power supply condition; Because rotor loss increases; The technical problem that limited rotor radiating condition causes rotor temperature rise to increase is studied a kind of rotor radiating condition that improves, and the permanent magnet machine rotor radiator structure that reduces rotor temperature rise becomes the technical problem that needs to be resolved hurrily.
The utility model content
The purpose of the utility model provides a kind of permanent magnet machine rotor heat abstractor, and this device makes magneto under the variable frequency power supply electric power thus supplied, through improving the rotor radiating condition, reduces rotor temperature rise, has significantly improved the magneto reliability of operation.
To achieve these goals, the utility model specifically provides a kind of technical scheme of permanent magnet machine rotor heat abstractor, a kind of permanent magnet machine rotor heat abstractor; Comprise: blade, permanent magnet, rotor and rotor end plates; Rotor end plates comprises rotor inner end plate and rotor outer end plate, and permanent magnet is installed in the groove of rotor, and the two ends of rotor are fixed with rotor inner end plate and rotor outer end plate; And be sleeved on together in the rotating shaft of motor; Be fixed with blade on the rotor end plates, when motor rotates, drive the blade rotation, take away the heat of rotor surface.
As the further improvement of a kind of permanent magnet machine rotor heat abstractor of the utility model technical scheme, rotor, the installation direction of rotor inner end plate and rotor outer end plate upper edge machine shaft has ventilation hole, forms the rotor axial air pipe.
As the further improvement of a kind of permanent magnet machine rotor heat abstractor of the utility model technical scheme, on rotor inner end plate and rotor outer end plate, all be fixed with blade.
As the further improvement of a kind of permanent magnet machine rotor heat abstractor of the utility model technical scheme, rotor end plates and blade are unitary whole formula structure.
Another kind as the technical scheme of a kind of permanent magnet machine rotor heat abstractor of the utility model improves, and blade pass is crossed screw and is separately fixed on rotor inner end plate and the rotor outer end plate.
As the further improvement of a kind of permanent magnet machine rotor heat abstractor of the utility model technical scheme, blade is radially evenly distribution at rotor inner end plate and rotor outer end plate upper edge circumference.
As the further improvement of a kind of permanent magnet machine rotor heat abstractor of the utility model technical scheme, blade installation is being positioned at the relative outside of rotor end plates ventilation hole on the rotor end plates circumferencial direction.
As the further improvement of a kind of permanent magnet machine rotor heat abstractor of the utility model technical scheme, the installation quantity of blade is provided with according to the external diameter of rotor.
As the further improvement of a kind of permanent magnet machine rotor heat abstractor of the utility model technical scheme, blade adopts aluminum alloy materials or high-intensity composite material.
Through implementing the technical scheme of a kind of permanent magnet machine rotor heat abstractor of above-mentioned the utility model, it is simple to have structural design, good manufacturability, the advantage that cost is low.When machine operation, place of the rotation of the blade of rotor end plates with rotor, play the effect of built-in fans, as the pressure head source of rotor wind path, utilize the coolant in the motor that the heat that rotor produces is taken away, can play better cooling effect.Temperature of rotor is low simultaneously, can effectively reduce the danger of permanent magnet Yin Gaowen demagnetization or loss of excitation, thereby makes the motor operational efficiency high, and the motor reliability strengthens, and prolong useful life.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the rotor longitudinal profile sketch map of a kind of embodiment of the utility model permanent magnet machine rotor heat abstractor;
Fig. 2 is the rotor axial generalized section of a kind of embodiment of the utility model permanent magnet machine rotor heat abstractor;
Fig. 3 is the rotor blade structure sketch map 1 of a kind of embodiment of the utility model permanent magnet machine rotor heat abstractor;
Fig. 4 is the rotor blade structure sketch map 2 of a kind of embodiment of the utility model permanent magnet machine rotor heat abstractor;
Fig. 5 is the rotor blade structure sketch map 3 of a kind of embodiment of the utility model permanent magnet machine rotor heat abstractor;
Wherein: 1-blade, 2-rotor axial air pipe, 3-permanent magnet, 4-screw, 5-rotor inner end plate, 6-rotor outer end plate, 7-rotating shaft, 8-rotor.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is a part of embodiment of the utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Shown in accompanying drawing 1 to accompanying drawing 5, provided the specific embodiment of a kind of motor teeth groove of the utility model location torque measurement mechanism, below in conjunction with accompanying drawing and specific embodiment the utility model is described further.
The embodiment of a kind of permanent magnet machine rotor heat abstractor as depicted in figs. 1 and 2 comprises: blade 1, permanent magnet 3; Rotor 8 and rotor end plates, rotor end plates further comprise rotor inner end plate 5 and rotor outer end plate 6, and permanent magnet 3 is installed in the groove of rotor 8; The two ends of rotor 8 are fixed with rotor inner end plate 5 and rotor outer end plate 6, and are sleeved on together in the rotating shaft 7 of motor, are fixed with blade 1 on the rotor end plates; When motor rotates, drive blade 1 rotation, take away the heat of rotor surface.
For the further heat-sinking capability of strengthening rotor, rotor 8, the installation direction of rotor inner end plate 5 and rotor outer end plate 6 upper edge machine shafts has ventilation hole, forms rotor axial air pipe 2.Blade 1 can be arranged on rotor inner end plate 5 and/or the rotor outer end plate 6.Rotor inner end plate 5 and/or rotor outer end plate 6 can be the monolithic construction of one processing or casting with blade 1.Blade 1 also can be separately fixed on rotor inner end plate 5 and the rotor outer end plate 6 through screw 4.Blade 1 is radially evenly distribution at rotor inner end plate 5 and rotor outer end plate 6 upper edge circumference.Blade 1 is installed in and is positioned at the relative outside of rotor end plates ventilation hole on the rotor end plates circumferencial direction, and the installation quantity of blade 1 is provided with according to the external diameter of rotor 8, can adopt aluminum alloy materials, also can adopt high strength composite.This structural design is simple, good manufacturability, and cost is low.
The assembling process of permanent magnet machine rotor heat abstractor is: through frock with the rotor punching of specified quantity and rotor inner end plate 5 hot jackets in rotating shaft 7; Adopt frock to import the permanent magnet 3 of segmentation in rotors 8 mounting grooves and put in place; Again with rotor outer end plate 6 hot jackets in rotating shaft 7, and it is put in place through equipment such as hydraulic presses.Blade 1 with specified quantity is fixed on the rotor end plates through screw 4 at last.In the assembling process, notice that both sides rotor end plates and rotor punching ventilation hole will align, to guarantee good axial ventilation effect.
The described rotor cooling principle of the utility model embodiment is: through on the rotor end plates of both sides, increasing the vanelets of similar fan, when motor rotated, drive placed the blade of rotor end plates to rotate with the rotation of rotor; Play the effect of built-in fans; Thereby the front and back at blade form pressure differential, and the air-flow that drives rotor surface rotates with rotor, and air-flow brushes rotor surface; The heat that rotor produces is taken away, reached the purpose that reduces rotor temperature rise.Particularly, when reducing temperature of rotor, can effectively reduce the danger of permanent magnet Yin Gaowen demagnetization or loss of excitation, thereby make the motor operational efficiency high, the motor reliability strengthens, and prolong useful life.
To shown in Figure 5, blade processing is become L shaped structure like Fig. 3, and be fixed on rotor inner end plate 5 and the rotor outer end plate 6 through screw 4.
The above only is the preferred embodiment of the utility model, is not the utility model is done any pro forma restriction.Though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model.Any those of ordinary skill in the art; Do not breaking away under the utility model technical scheme scope situation; All the method for above-mentioned announcement capable of using and technology contents are made many possible changes and modification to the utility model technical scheme, or are revised as the equivalent embodiment of equivalent variations.Therefore; Every content that does not break away from the utility model technical scheme; According to the technical spirit of the utility model to any simple modification that above embodiment did, be equal to replacement, equivalence changes and modify, all still belong in the scope of the utility model technical scheme protection.

Claims (9)

1. a permanent magnet machine rotor heat abstractor is characterized in that, comprising: blade (1); Permanent magnet (3), rotor (8) and rotor end plates, rotor end plates comprise rotor inner end plate (5) and rotor outer end plate (6); Permanent magnet (3) is installed in the groove of rotor (8); The two ends of rotor (8) are fixed with rotor inner end plate (5) and rotor outer end plate (6), and are sleeved on together in the rotating shaft (7) of motor, are fixed with blade (1) on the rotor end plates; When motor rotates, drive blade (1) rotation, take away the heat of rotor surface.
2. a kind of permanent magnet machine rotor heat abstractor according to claim 1; It is characterized in that: described rotor (8); The installation direction of rotor inner end plate (5) and rotor outer end plate (6) upper edge machine shaft has ventilation hole, forms rotor axial air pipe (2).
3. a kind of permanent magnet machine rotor heat abstractor according to claim 1 and 2 is characterized in that: on described rotor inner end plate (5) and rotor outer end plate (6), all be fixed with blade (1).
4. a kind of permanent magnet machine rotor heat abstractor according to claim 3 is characterized in that: described rotor end plates and blade (1) are unitary whole formula structure.
5. a kind of permanent magnet machine rotor heat abstractor according to claim 3 is characterized in that: described blade (1) is separately fixed on rotor inner end plate (5) and the rotor outer end plate (6) through screw (4).
6. a kind of permanent magnet machine rotor heat abstractor according to claim 5 is characterized in that: described blade (1) is radially evenly distribution at rotor inner end plate (5) and rotor outer end plate (6) upper edge circumference.
7. a kind of permanent magnet machine rotor heat abstractor according to claim 6 is characterized in that: described blade (1) is installed in and is positioned at the relative outside of rotor end plates ventilation hole on the rotor end plates circumferencial direction.
8. a kind of permanent magnet machine rotor heat abstractor according to claim 7 is characterized in that: the installation quantity of said blade (1) is provided with according to the external diameter of rotor (8).
9. a kind of permanent magnet machine rotor heat abstractor according to claim 8 is characterized in that: described blade (1) adopts aluminum alloy materials.
CN2011202816815U 2011-08-04 2011-08-04 Radiating device of permanent magnet motor rotor Expired - Lifetime CN202260856U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011202816815U CN202260856U (en) 2011-08-04 2011-08-04 Radiating device of permanent magnet motor rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011202816815U CN202260856U (en) 2011-08-04 2011-08-04 Radiating device of permanent magnet motor rotor

Publications (1)

Publication Number Publication Date
CN202260856U true CN202260856U (en) 2012-05-30

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104426263A (en) * 2013-08-26 2015-03-18 苏州奥宝杰电机科技有限公司 Rotor and brushless motor adopting same
CN105429413A (en) * 2015-12-31 2016-03-23 青岛地恩地机电科技股份有限公司 Electric tool with outer rotor wheel hub motor
CN105846580A (en) * 2016-06-06 2016-08-10 南通金驰机电有限公司 Surface-mounted permanent magnet motor structure
CN108063503A (en) * 2017-12-27 2018-05-22 无锡浩盛电机制造有限公司 A kind of motor rotor construction
CN109292596A (en) * 2018-10-23 2019-02-01 威特电梯部件(苏州)有限公司 A kind of elevator traction machine
CN110474470A (en) * 2019-07-10 2019-11-19 中车永济电机有限公司 Low-loss, low noise the totally-enclosed self-ventilation pulling motor of 100% low floor vehicle
CN112737176A (en) * 2020-12-29 2021-04-30 滨州博而特电机有限公司 Rotor of permanent magnet motor
WO2023240788A1 (en) * 2022-06-15 2023-12-21 广州地铁集团有限公司 Rotor assembly, and motor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104426263A (en) * 2013-08-26 2015-03-18 苏州奥宝杰电机科技有限公司 Rotor and brushless motor adopting same
CN105429413A (en) * 2015-12-31 2016-03-23 青岛地恩地机电科技股份有限公司 Electric tool with outer rotor wheel hub motor
CN105846580A (en) * 2016-06-06 2016-08-10 南通金驰机电有限公司 Surface-mounted permanent magnet motor structure
CN108063503A (en) * 2017-12-27 2018-05-22 无锡浩盛电机制造有限公司 A kind of motor rotor construction
CN109292596A (en) * 2018-10-23 2019-02-01 威特电梯部件(苏州)有限公司 A kind of elevator traction machine
CN110474470A (en) * 2019-07-10 2019-11-19 中车永济电机有限公司 Low-loss, low noise the totally-enclosed self-ventilation pulling motor of 100% low floor vehicle
CN110474470B (en) * 2019-07-10 2021-08-03 中车永济电机有限公司 Low-loss low-noise totally-enclosed self-ventilation traction motor for 100% low-floor vehicle
CN112737176A (en) * 2020-12-29 2021-04-30 滨州博而特电机有限公司 Rotor of permanent magnet motor
WO2023240788A1 (en) * 2022-06-15 2023-12-21 广州地铁集团有限公司 Rotor assembly, and motor

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GR01 Patent grant
CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 412001 Hunan Province, Zhuzhou Shifeng District Tian Xin era Road No. 169

Patentee after: ZHUZHOU CRRC TIMES ELECTRIC Co.,Ltd.

Address before: 412001 Hunan Province, Zhuzhou Shifeng District Tian Xin era Road No. 169

Patentee before: ZHUZH CSR TIMES ELECTRIC Co.,Ltd.

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20120530