CN113937942A - Permanent magnet synchronous motor and end cover thereof - Google Patents
Permanent magnet synchronous motor and end cover thereof Download PDFInfo
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- CN113937942A CN113937942A CN202010606318.XA CN202010606318A CN113937942A CN 113937942 A CN113937942 A CN 113937942A CN 202010606318 A CN202010606318 A CN 202010606318A CN 113937942 A CN113937942 A CN 113937942A
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- permanent magnet
- magnet synchronous
- end cover
- synchronous motor
- hollow cavity
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 100
- 238000001816 cooling Methods 0.000 claims abstract description 99
- 239000000110 cooling liquid Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000002826 coolant Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 4
- 239000008233 hard water Substances 0.000 claims description 3
- 239000008234 soft water Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 4
- 230000017525 heat dissipation Effects 0.000 abstract description 27
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000001788 irregular Effects 0.000 description 4
- 239000012809 cooling fluid Substances 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention provides a permanent magnet synchronous motor and an end cover thereof, wherein the permanent magnet synchronous motor comprises a shell with a cooling channel, a stator, a rotor, a bearing and end covers respectively positioned at two ends of the permanent magnet synchronous motor, a through hole for mounting the bearing is arranged at the center of each end cover, a hollow cavity is arranged inside at least one end cover of the two end covers, the hollow cavity is close to the through hole in the radial direction of the through hole, the hollow cavity surrounds the through hole along at least part of the circumferential direction of the through hole, and cooling liquid is filled in the hollow cavity to form an end cover cooling channel so as to cool the bearing at least. According to the invention, the hollow cavity close to the bearing is arranged in the end cover to introduce the cooling liquid, so that the heat dissipation capability of the permanent magnet synchronous motor can be effectively improved, and particularly the heat dissipation capability of the bearing is effectively improved.
Description
Technical Field
The invention relates to a heat dissipation technology of a motor, in particular to a permanent magnet synchronous motor with an end cover heat dissipation structure and an end cover of the permanent magnet synchronous motor with the heat dissipation structure.
Background
The rail transit vehicle traction motor is arranged on a vehicle bottom bogie and limited by an installation space, and the motor is required to have smaller volume and lighter weight. The permanent magnet synchronous motor has the advantages of high efficiency, light weight, small size, good controllability and the like, is increasingly applied to the field of rail transit, and is a recognized traction motor of the next generation of rail transit vehicles. The permanent magnet synchronous motor is excited by the permanent magnet, so that the permanent magnet synchronous motor has strong magnetism and is easy to adsorb dust, impurities and the like in air, and the permanent magnet synchronous motor is usually in a fully closed structure. The totally-enclosed structure causes the difficulty in heat dissipation of the components such as the permanent magnet synchronous motor bearing, the rotor and the like, and the traction motor itself generates heat seriously due to the limitation of power, weight and volume, so that the temperature rise of the components such as the bearing, the rotor and the like is aggravated, and therefore, for the permanent magnet synchronous traction motor for rail transit, the temperature rise of the components such as the bearing, the rotor and the like is a key factor for limiting the power exertion.
In order to solve the heat dissipation problem of the permanent magnet synchronous motor, the prior art provides a permanent magnet synchronous motor provided with a cooling channel in a housing. Fig. 1 shows a schematic structural diagram of a permanent magnet synchronous motor with the advantages of high cooling efficiency, low noise and the like, which is common in the prior art. As shown in fig. 1, the conventional permanent magnet synchronous motor includes: the casing 100 with the casing cooling passage 110, the stator 200, the rotor 300, the bearing 400, and the end cap 500. The bearing 400 is used to set a rotation shaft for driving the rotor 300 to rotate, the stator 200 is fixed on the inner wall of the casing 100, and two ends of the permanent magnet synchronous motor are tightly covered and sealed by the end covers 500. It will be appreciated that fig. 1 only shows the upper half of the cross-section of the permanent magnet synchronous machine, the lower half of the cross-section of the permanent magnet synchronous machine being symmetrical about the axis of rotation.
The heat dissipation method of the case cooling channel 110 is as follows: heat generated from the coils and the core of the stator 200 is transferred to the casing 100 through a portion contacting the casing 100, and is carried away by the cooling fluid inside the casing cooling passage 110. In the conventional permanent magnet synchronous motor, the rotor 300, the bearing 400 and other components cannot be directly cooled by the cooling liquid in the casing cooling channel 110, and only radiation heat dissipation or heat dissipation through a long path of heat transfer is required, so that the heat dissipation condition is poor and the efficiency is low.
The temperature rise of the bearing 400, the rotor 300 and other components is an important factor for limiting the power exertion of the permanent magnet synchronous motor. Meanwhile, if the temperature rise of the components such as the bearing 400, the rotor 300 and the like is high, the service life of the motor bearing, the permanent magnet and the winding insulation is also affected.
In view of this, it is needed to provide a new permanent magnet synchronous motor, which can effectively reduce the temperature rise of the critical components such as the bearing and the rotor of the permanent magnet synchronous motor, so as to increase the power of the permanent magnet synchronous motor, and on the other hand, prolong the life of the critical components such as the bearing, the permanent magnet and the insulation, thereby increasing the life and reliability of the motor.
Disclosure of Invention
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
As described above, in order to effectively reduce the temperature rise of the key components such as the bearing and the rotor of the permanent magnet synchronous motor, thereby improving the power of the permanent magnet synchronous motor, and prolonging the service life of the key components such as the bearing, the permanent magnet and the insulation, and improving the service life and the reliability of the motor, the invention provides a permanent magnet synchronous motor, which comprises a casing, a stator, a rotor, a bearing and end covers respectively positioned at two ends of the permanent magnet synchronous motor, wherein the center of the end cover is provided with a through hole for installing the bearing, a hollow cavity is arranged inside at least one end cover of the end covers at two ends, the hollow cavity is close to the through hole in the radial direction of the through hole, the hollow cavity surrounds the through hole along at least part of the circumferential direction of the through hole, and cooling liquid is filled in the hollow cavity to form an end cover cooling channel, to cool at least the bearing.
The hollow cavity is arranged in the end cover close to the bearing, and the cooling liquid is introduced into the cavity, so that the cooling liquid can directly dissipate heat of the bearing, the heat dissipation capacity of the bearing can be improved, and the heat dissipation efficiency of the permanent magnet synchronous motor is improved.
In an embodiment of the permanent magnet synchronous motor, optionally, the hollow cavity surrounds the through hole along a whole circumferential direction of the through hole. Through making hollow cavity encircle the through-hole along whole circumferencial direction, can increase the area of contact between coolant liquid and the bearing effectively promptly to can further improve the heat-sinking capability of bearing, PMSM's radiating efficiency is higher.
In an embodiment of the permanent magnet synchronous motor, optionally, the hollow cavity is close to an inner side of the end cover in a mounting direction of the end cover to cool the rotor. Through setting up hollow cavity in the inboard of end cover, can subtract the distance between short hollow cavity and the rotor to can utilize the coolant liquid in the hollow cavity to dispel the heat to the rotor in the lump, thereby can alleviate the heat dissipation problem of rotor, wholly promote PMSM's radiating efficiency.
In an embodiment of the permanent magnet synchronous motor, optionally, the hollow cavity extends outward in a radial direction of the through hole to cool the stator. Through radially outwards extending hollow cavity along the through-hole, can reduce the distance between hollow cavity and the stator to make the coolant liquid in the hollow cavity can dispel the heat to the stator in the lump, thereby can improve the radiating efficiency of stator, further improvement PMSM's radiating efficiency.
In an embodiment of the permanent magnet synchronous motor, optionally, the end cover cooling channel and the casing cooling channel of the casing are located in the same motor cooling channel of the permanent magnet synchronous motor.
In an embodiment of the permanent magnet synchronous motor, optionally, the end cover cooling channel and the casing cooling channel are connected in parallel in the motor cooling channel through a connection water pipe.
In an embodiment of the permanent magnet synchronous motor, optionally, the end cover cooling channel and the casing cooling channel are connected in series in the motor cooling channel through a connection water pipe.
In an embodiment of the permanent magnet synchronous motor, optionally, the hollow cavities are disposed in both end caps of the permanent magnet synchronous motor, the hollow cavities in both end caps are filled with cooling liquid to respectively form a first end cap cooling channel and a second end cap cooling channel, and the first end cap cooling channel and the second end cap cooling channel are connected in series through a connecting water pipe.
In an embodiment of the permanent magnet synchronous motor, optionally, the casing cooling channel of the casing and the first end cover cooling channel and the second end cover cooling channel connected in series are located in the same motor cooling channel of the permanent magnet synchronous motor.
In an embodiment of the permanent magnet synchronous motor, optionally, the casing cooling channel and the first end cap cooling channel and the second end cap cooling channel connected in series are connected in parallel in the motor cooling channel by a connection water pipe.
In an embodiment of the permanent magnet synchronous motor, optionally, the casing cooling channel of the casing and the first end cap cooling channel and the second end cap cooling channel connected in series are connected in series in the motor cooling channel by a connection water pipe.
In any embodiment of the foregoing permanent magnet synchronous motor, optionally, the connection water pipe is a soft water pipe or a hard water pipe.
The invention also provides an end cover of the permanent magnet synchronous motor, wherein the center of the end cover is provided with a through hole for mounting the bearing, a hollow cavity is arranged inside the end cover, the hollow cavity is close to the through hole in the radial direction of the through hole, the hollow cavity surrounds the through hole along at least part of the circumferential direction of the through hole, and cooling liquid is introduced into the hollow cavity to form an end cover cooling channel so as to cool the bearing at least.
In an embodiment of the end cap, optionally, the hollow cavity surrounds the through hole along the entire circumference of the through hole.
In an embodiment of the end cover, optionally, the hollow cavity is close to an inner side of the end cover in a mounting direction of the end cover to cool a rotor of the permanent magnet synchronous motor.
In an embodiment of the end cover, optionally, the hollow cavity extends outward along a radial direction of the through hole to cool the stator of the permanent magnet synchronous motor.
According to the permanent magnet synchronous motor and the end cover thereof provided by the invention, the overall heat dissipation capacity of the permanent magnet synchronous motor can be effectively improved, and the problem of overhigh temperature rise of key components such as permanent magnet synchronous motor bearings and the like is solved, so that the temperature rise of the key components such as the bearings and the like can be reduced, the service life and the reliability of the key components such as the motor bearings and the like are improved, meanwhile, the internal heat dissipation capacity of the motor can be further enhanced, and the power of the motor is improved.
Drawings
The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.
Fig. 1 shows a schematic structural diagram of a permanent magnet synchronous motor in the prior art.
Fig. 2 illustrates a schematic front view of an embodiment of an end cap of a permanent magnet synchronous machine provided according to an aspect of the present invention.
Fig. 3 illustrates a schematic front view of another embodiment of an end cap of a permanent magnet synchronous machine provided in accordance with an aspect of the present invention.
Fig. 4 shows a cross-sectional schematic view of an end cover of a permanent magnet synchronous machine provided according to an aspect of the present invention.
Fig. 5 illustrates a cross-sectional schematic view of a permanent magnet synchronous machine provided in accordance with an aspect of the present invention.
Reference numerals
100 casing
110 casing cooling channel
200 stator
300 rotor
400 bearing
500. 600 end cap
610 through hole
700 hollow cavity
710 end cap cooling channel
720 water inlet/outlet
800 connecting water pipe
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be construed as imposing any limitation on the scope of the present invention.
The invention relates to a permanent magnet synchronous motor and an end cover thereof, which can effectively improve the overall heat dissipation capacity of the permanent magnet synchronous motor and solve the problem of overhigh temperature rise of key components such as permanent magnet synchronous motor bearings and the like, thereby reducing the temperature rise of the key components such as the bearings and the like, improving the service life and reliability of the key components such as the motor bearings and the like, further enhancing the heat dissipation capacity in the motor and improving the power of the motor.
The following description is presented to enable any person skilled in the art to make and use the invention and is incorporated in the context of a particular application. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to a wide range of embodiments. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In the following detailed description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the practice of the invention may not necessarily be limited to these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present invention.
The reader's attention is directed to all papers and documents which are filed concurrently with this specification and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference. All the features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
Note that where used, the designations left, right, front, back, top, bottom, positive, negative, clockwise, and counterclockwise are used for convenience only and do not imply any particular fixed orientation. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object.
As described above, in order to effectively reduce the temperature rise of the critical components such as the bearing and the rotor of the permanent magnet synchronous motor, thereby improving the power of the permanent magnet synchronous motor, prolonging the service life of the critical components such as the bearing, the permanent magnet and the insulation, and improving the service life and reliability of the motor, the invention provides the end cover for the permanent magnet synchronous motor, which can improve the heat dissipation capability of the permanent magnet synchronous motor. Please refer to fig. 2-4 to understand the end covers installed at both ends of the permanent magnet synchronous motor provided by the present invention.
Referring first to fig. 2, fig. 2 is a schematic front view of an embodiment of an end cover of a permanent magnet synchronous motor according to an aspect of the present invention. As shown in fig. 2, an aspect of the present invention provides an end cap 600 having a through hole 610 at a center thereof for mounting a bearing, the end cap 600 having a hollow chamber 700 formed inside thereof, the hollow chamber 700 being adjacent to the through hole 610 in a radial direction of the through hole 610, the hollow chamber 700 surrounding the through hole 610 in a partial circumferential direction of the through hole 610, and a cooling fluid may be introduced into the hollow chamber 700 through an inlet/outlet port 720 to form an end cap cooling passage for cooling the bearing mounted in the through hole 610.
It will be appreciated that for purposes of clarity of illustration, a hollow cavity 700 disposed inside the end cap 600 is shown in solid lines in fig. 2. It should be understood that, in order to adapt to the shape of the permanent magnet motor, the shape of the end cap 600 may be designed to be irregular, and therefore, the hollow cavity 700 inside the end cap 600 may also have an irregular shape, and fig. 2 is only a schematic diagram illustrating the relative relationship between the hollow cavity 700 and the through hole 610, and is not a substantial limitation on the specific shape of the hollow cavity 700.
Through the inside at the end cover 600 that is close to the bearing sets up hollow cavity 700 to let in the coolant liquid in hollow cavity 700, can make the coolant liquid can directly dispel the heat to the bearing of installing in through-hole 610, thereby can improve the heat-sinking capability of bearing, and then improve PMSM's radiating efficiency.
It will be appreciated that the person skilled in the art may use existing or future cooling fluids having a high cooling efficiency to introduce into the hollow chamber. The above-mentioned cooling liquid includes, but is not limited to, cooling water, cooling oil, etc., and the specific implementation manner of the cooling liquid should not unduly limit the protection scope of the present invention.
In another preferred embodiment, the hollow cavity 700 surrounds the through-hole 610 in the entire circumferential direction of the through-hole 610. Fig. 3 shows the above preferred embodiment, and as shown in fig. 3, the hollow chamber 700 surrounds the entire circumference of the through-hole 610.
It will be appreciated that for purposes of clarity of illustration, a hollow cavity 700 disposed inside the end cap 600 is shown in solid lines in fig. 3. It should be understood that, in order to adapt to the shape of the permanent magnet motor, the shape of the end cap 600 may be designed to be irregular, and therefore, the hollow cavity 700 inside the end cap 600 may also have an irregular shape, and fig. 3 is only a schematic diagram illustrating a relative relationship between the hollow cavity 700 and the through hole, and is not a substantial limitation to the specific shape of the hollow cavity 700.
Through making hollow cavity 700 encircle through-hole 610 along whole circumferencial direction, can increase the area of contact between coolant liquid and the bearing effectively to can further improve the heat-sinking capability of bearing, PMSM's radiating efficiency is higher.
In another embodiment of the end cap, the hollow cavity 700 is adjacent to the inner side of the end cap 600 in the installation direction of the end cap 600 to cool the rotor of the permanent magnet synchronous motor. Through setting up hollow cavity in the inboard of end cover, can subtract the distance between short hollow cavity and the rotor to can utilize the coolant liquid in the hollow cavity to dispel the heat to the rotor in the lump, thereby can alleviate the heat dissipation problem of rotor, wholly promote PMSM's radiating efficiency.
Preferably, in the above embodiment, the hollow cavity 700 is not only close to the inner side of the end cover 600 in the installation direction of the end cover 600, but also the hollow cavity 700 extends outward in the radial direction of the through hole 610 to cool the stator of the permanent magnet synchronous motor. Through radially outwards extending hollow cavity along the through-hole, can reduce the distance between hollow cavity and the stator to make the coolant liquid in the hollow cavity can dispel the heat to the stator in the lump, thereby can improve the radiating efficiency of stator, further improvement PMSM's radiating efficiency.
Fig. 4 shows a schematic diagram of a preferred embodiment of the end cover, as shown in fig. 4, the right side of the end cover 600 is a key component of a stator, a rotor, and the like of the permanent magnet synchronous motor, and therefore, the hollow cavity 700 is arranged inside the end cover 600 at a position close to the right side. Also, the hollow cavity 700 is further provided to extend outward in a radial direction of the through hole 610. As can be seen from fig. 4, heat Q1 from the rotor and stator of the permanent magnet synchronous motor on the right side of the end cover 600 can be cooled by an end cover cooling channel formed by a hollow cavity 700 extending radially outward along a through hole near the inner side of the end cover. The heat Q2 from the bearing can also be cooled by the end cap cooling channel formed by the hollow cavity 700 near the through hole where the bearing is mounted.
Thus, a specific implementation of an end cap for a permanent magnet synchronous machine provided according to an aspect of the present invention has been described. Please refer to fig. 5 to understand the application of the end cover provided by the present invention to a permanent magnet synchronous motor. Fig. 5 illustrates a cross-sectional schematic view of a permanent magnet synchronous machine provided in accordance with an aspect of the present invention. It will be appreciated that fig. 5 only shows the upper half of the cross-section of the permanent magnet synchronous machine, the lower half of the cross-section of the permanent magnet synchronous machine being symmetrical about the axis of rotation.
As shown in fig. 5, a permanent magnet synchronous motor provided in another aspect of the present invention includes a casing 100 with a casing cooling channel 110, a stator 200, a rotor 300, a bearing 400, and an end cover 600 with an end cover cooling channel 710 provided in one aspect of the present invention. In the embodiment shown in fig. 5, the end covers at both ends of the permanent magnet synchronous motor are both provided with the end cover 600 with the end cover cooling channel 710 provided by another aspect of the invention.
Details regarding the end cap 600 with the end cap cooling channel 710 provided by another aspect of the present invention have been described above and will not be described herein. It is understood that in another embodiment, the end cover 600 with the end cover cooling channel 710 provided by another aspect of the present invention may be used only at one end of the permanent magnet synchronous motor, and the end cover 500 in the prior art may be used at the other end, although the heat dissipation efficiency is lower than the preferred embodiment shown in fig. 5, the heat dissipation effect of the key components such as the bearing can be effectively improved compared with the prior art.
As shown in fig. 5, the end cap cooling channel 710 can directly cool the bearing 400, thereby greatly increasing the heat dissipation capability of the bearing 400. In the preferred embodiment shown in fig. 5, the end cover cooling channel 710 can also greatly reduce the temperature of the inner space of the permanent magnet synchronous motor, including the stator, the rotor, and the like. Because the heat dissipation capacity in the motor is increased, the effect of further improving the power of the motor can be achieved.
As shown in fig. 5, the end cover cooling channel 710 and the casing cooling channel 110 are merged into the same motor cooling circuit through the connection water pipe 800, so that the overall cooling of the permanent magnet synchronous motor can be realized through the motor cooling circuit, and the cooling effect is greatly enhanced.
It is understood that in one embodiment, the end cover cooling channel 710 and the casing cooling channel 110 may be connected in parallel in the motor cooling channel by connecting water pipes.
In another embodiment, the end cap cooling channel 710 and the casing cooling channel 110 may be connected in series in the motor cooling channel by connecting water pipes.
When the end covers with the end cover cooling channels provided by the invention are adopted at both ends of the permanent magnet synchronous motor, the end cover cooling channels in the end covers at the left end and the right end can be connected in series through the connecting water pipes to serve as the complete end cover cooling channels, and then the complete end cover cooling channels are connected in series or in parallel with the shell cooling channels 110 through the connecting water pipes.
In the above embodiment, the water pipe 800 may be a soft water pipe or a hard water pipe as required by those skilled in the art.
Accordingly, the permanent magnet synchronous motor and the end cover thereof provided by the invention have been described, the cooling water channel which at least partially surrounds the bearing and has a large cooling area is arranged at the position close to the inner side in the end cover, and the connection with the cooling channel of the shell is realized through the connecting water pipe, so that the overall cooling of the motor can be realized, and the cooling effect is greatly enhanced. The permanent magnet synchronous motor and the end cover thereof not only can directly cool the bearing, but also can greatly reduce the temperature of the inner space of the motor, including a stator coil, a rotor and the like, and simultaneously can further improve the power of the motor due to the increase of the heat dissipation capacity in the motor.
The permanent magnet synchronous motor and the end cover thereof provided by the invention can effectively improve the overall heat dissipation capacity of the permanent magnet synchronous motor, so that the problem of overhigh temperature rise of key components such as a permanent magnet synchronous motor bearing and the like can be solved, the temperature rise of the key components such as the bearing and the like can be reduced, the service life and the reliability of the key components such as the motor bearing and the like can be improved, the internal heat dissipation capacity of the motor can be further enhanced, and the power of the motor can be improved.
Although the present disclosure has been described with respect to specific exemplary embodiments, it will be evident that various modifications and changes may be made to these embodiments without departing from the broader spirit and scope of the disclosure. The specification and drawings are, accordingly, to be regarded in an illustrative sense rather than a restrictive sense.
It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. Furthermore, in the foregoing detailed description, it can be seen that various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment. Thus the following claims are hereby incorporated into the detailed description, with each claim standing on its own as a separate embodiment.
Reference in the specification to one embodiment or an embodiment is intended to include within at least one embodiment of a circuit or method a particular feature, structure, or characteristic described in connection with the embodiment. The appearances of the phrase one embodiment in various places in the specification are not necessarily all referring to the same embodiment.
Claims (16)
1. The utility model provides a permanent magnet synchronous motor, is including casing, stator, rotor, the bearing that has cooling channel and being located respectively the end cover at permanent magnet synchronous motor both ends, the center of end cover is equipped with and is used for the installation the through-hole of bearing, its characterized in that, the inside of at least one end cover in the end cover of both ends is equipped with hollow cavity, hollow cavity is in the footpath of through-hole is close to the through-hole, hollow cavity follows at least partial circumferencial direction of through-hole encircles the through-hole, it has the coolant liquid in order to constitute end cover cooling channel to lead to in the hollow cavity, with at least the cooling the bearing.
2. The permanent magnet synchronous motor according to claim 1, wherein the hollow cavity surrounds the through hole in a full circumferential direction of the through hole.
3. The permanent magnet synchronous motor of claim 1, wherein the hollow cavity is adjacent to an inner side of the end cover in a mounting direction of the end cover to cool the rotor.
4. The permanent magnet synchronous motor of claim 3, wherein the hollow cavity extends radially outward of the through-hole to cool the stator.
5. The permanent magnet synchronous motor of claim 1 wherein the end cap cooling channel and the casing cooling channel of the casing are located in the same motor cooling channel of the permanent magnet synchronous motor.
6. The permanent magnet synchronous motor according to claim 5, wherein the end cover cooling passage and the housing cooling passage are connected in parallel in the motor cooling passage by a connection water pipe.
7. The permanent magnet synchronous motor according to claim 5, wherein the end cover cooling passage and the case cooling passage are connected in series in the motor cooling passage by a connection water pipe.
8. The permanent magnet synchronous motor according to claim 1, wherein the hollow cavities are formed in both end covers of the permanent magnet synchronous motor, the hollow cavities in both end covers are filled with cooling liquid to form a first end cover cooling channel and a second end cover cooling channel respectively, and the first end cover cooling channel and the second end cover cooling channel are connected in series through a connecting water pipe.
9. The method of manufacturing of claim 8, wherein the casing cooling channel of the casing and the first end cap cooling channel and the second end cap cooling channel connected in series are located in a same motor cooling channel of the permanent magnet synchronous motor.
10. The manufacturing method according to claim 9, wherein the housing cooling passage and the first and second end cap cooling passages connected in series are connected in parallel in the motor cooling passage by a connecting water pipe.
11. The manufacturing method according to claim 9, wherein the housing cooling passage of the housing and the first and second end cap cooling passages connected in series are connected in series in the motor cooling passage by a connection water pipe.
12. The manufacturing method as claimed in any one of claims 6 to 11, wherein the connection water pipe is a soft water pipe or a hard water pipe.
13. The utility model provides an end cover of permanent magnet synchronous motor, the end cover center is equipped with and is used for installing the through-hole of bearing, its characterized in that, the inside of end cover is equipped with hollow cavity, hollow cavity is in the footpath of through-hole is close to the through-hole, hollow cavity follows at least partial circumferencial direction of through-hole encircles the through-hole, it has coolant liquid to lead to in the hollow cavity in order to constitute end cover cooling channel, with at least the cooling the bearing.
14. An end cap according to claim 13, wherein the hollow cavity surrounds the through bore in all circumferential directions of the through bore.
15. The end cap of claim 13, wherein the hollow cavity is adjacent to an inner side of the end cap in a mounting direction of the end cap to cool a rotor of the permanent magnet synchronous motor.
16. The end cap of claim 14, wherein the hollow cavity extends radially outward of the through-hole to cool a stator of the permanent magnet synchronous motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010606318.XA CN113937942A (en) | 2020-06-29 | 2020-06-29 | Permanent magnet synchronous motor and end cover thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010606318.XA CN113937942A (en) | 2020-06-29 | 2020-06-29 | Permanent magnet synchronous motor and end cover thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113937942A true CN113937942A (en) | 2022-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010606318.XA Pending CN113937942A (en) | 2020-06-29 | 2020-06-29 | Permanent magnet synchronous motor and end cover thereof |
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|---|---|
| CN (1) | CN113937942A (en) |
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| CN109687630A (en) * | 2018-12-07 | 2019-04-26 | 中车永济电机有限公司 | A kind of locomotive permanent-magnet synchronizing traction motor rotor seal structure |
| CN110429760A (en) * | 2019-07-25 | 2019-11-08 | 中车永济电机有限公司 | A kind of full-enclosed permanent-magnet motor bearings cooling structure equipped with separate space |
| CN210867385U (en) * | 2019-12-25 | 2020-06-26 | 苏州保邦电气有限公司 | Novel integrated water cooling system of high-speed permanent magnet motor |
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2020
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| GB1039770A (en) * | 1962-11-07 | 1966-08-24 | American Radiator & Standard | Refrigerant cooled electric motor |
| DD273923A1 (en) * | 1988-07-05 | 1989-11-29 | Werkzeugmasch Okt Veb | LIQUID-COOLED HOUSING FOR AN ELECTRIC MOTOR |
| DE4232322A1 (en) * | 1992-09-26 | 1994-03-31 | Kessler Franz Kg | Cooling device for induction or DC motor - has extra cooling jackets around rotor shaft between core-ends and bearings, connected with main stator coolant circuit |
| RU2201647C2 (en) * | 2001-05-04 | 2003-03-27 | ОАО "Элсиб" | Cooling system of totally enclosed electrical machine |
| US20030094872A1 (en) * | 2001-11-16 | 2003-05-22 | Tornquist Gerald Eugene | Rotor end caps and a method of cooling a high speed generator |
| CN2544459Y (en) * | 2002-04-28 | 2003-04-09 | 张世珞 | Water cooling high-temp. resistant motor |
| US20090243446A1 (en) * | 2004-10-18 | 2009-10-01 | Siemens Aktiengesellschaft | Housing of an Electrical Machine Comprising Cooling Channels Extending in a Housing Wall |
| CN101034828A (en) * | 2006-03-07 | 2007-09-12 | 上海上电电机有限公司 | Water-cooling three-phase asynchronous high-speed motor |
| CN201113625Y (en) * | 2007-08-31 | 2008-09-10 | 贵阳航空电机有限公司 | Automobile generator back end cover bearing base |
| JP2010004630A (en) * | 2008-06-19 | 2010-01-07 | Honda Motor Co Ltd | Motor |
| US20110304226A1 (en) * | 2010-06-14 | 2011-12-15 | Bradfield Michael D | Electric Machine Cooling System and Method |
| CN102769356A (en) * | 2011-05-05 | 2012-11-07 | 株洲南车时代电气股份有限公司 | Permanent magnet synchronous traction motor with air cooling structure and air cooling method of permanent magnet synchronous traction motor |
| CN203056746U (en) * | 2013-01-31 | 2013-07-10 | 分宜宏大煤矿电机制造有限公司 | Novel high strength water cooling electromotor end cover |
| CN106208499A (en) * | 2016-08-13 | 2016-12-07 | 中车永济电机有限公司 | A kind of full-enclosed permanent-magnet motor ventilation cooling structure |
| CN106712367A (en) * | 2016-11-29 | 2017-05-24 | 中车永济电机有限公司 | High speed train totally enclosed type permanent magnetic traction motor |
| JP2018207673A (en) * | 2017-06-05 | 2018-12-27 | 東芝三菱電機産業システム株式会社 | Rotary electric machine |
| CN206977197U (en) * | 2017-06-23 | 2018-02-06 | 中山大洋电机股份有限公司 | A kind of electric motor end cap and its motor of application |
| CN108539888A (en) * | 2018-03-30 | 2018-09-14 | 合肥巨动力系统有限公司 | A kind of permanent-magnetic synchronous motor rotor radiator structure |
| CN208522579U (en) * | 2018-06-22 | 2019-02-19 | 大陆汽车投资（上海）有限公司 | A kind of cooling device and belt driving motor assembly |
| CN109687630A (en) * | 2018-12-07 | 2019-04-26 | 中车永济电机有限公司 | A kind of locomotive permanent-magnet synchronizing traction motor rotor seal structure |
| CN110429760A (en) * | 2019-07-25 | 2019-11-08 | 中车永济电机有限公司 | A kind of full-enclosed permanent-magnet motor bearings cooling structure equipped with separate space |
| CN210867385U (en) * | 2019-12-25 | 2020-06-26 | 苏州保邦电气有限公司 | Novel integrated water cooling system of high-speed permanent magnet motor |
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Application publication date: 20220114 |
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