CN203456961U - Permanent-magnet direct-driven traction motor - Google Patents
Permanent-magnet direct-driven traction motor Download PDFInfo
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- CN203456961U CN203456961U CN201320520211.9U CN201320520211U CN203456961U CN 203456961 U CN203456961 U CN 203456961U CN 201320520211 U CN201320520211 U CN 201320520211U CN 203456961 U CN203456961 U CN 203456961U
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- rotating shaft
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Abstract
The utility model provides a permanent-magnet direct-driven traction motor which comprises the following components: a housing, a stator, a rotor and a bearing assembly. The housing comprises a base, a left end cover and a right end cover. The stator comprises a stator core and a stator winding. The stator is fixedly arranged on the base of the housing through the stator core. The rotor comprises a rotor core, a permanent magnet, a rotating shaft and a shaft key. The rotating shaft is a hollow cylinder. The rotor core is pressed into the rotating shaft from one side of the rotating shaft, and furthermore the rotor core and the rotating shaft are integrated through shaft key connection. The permanent magnet is inserted into the rotor core and forms an integrated structure with the rotor core. The bearing assembly comprises two bearings and four bearing covers. The permanent-magnet direct-driven traction motor can be in direct driving connection with wheels through elastic couplings, and no gear transmission device is required. The permanent-magnet direct-driven traction motor has the following functions: saving cost, reducing noise and improving transmission efficiency. Curve passing-through capability of a turning frame is improved. High-performance permanent magnet material is adopted, and power density of the motor is greatly improved. Compared with a motor with same power, the volume and mass of the permanent-magnet direct-driven traction motor can be greatly improved.
Description
Technical field
The utility model relates to machine field, is specifically related to a kind of permanent magnet direct-drive traction electric machine for railcar.
Background technology
Traditional city underground vehicle traction mode adopts the mode of non-direct driving to drive with asynchronous traction motor conventionally, the transmission of torque by gear drive, asynchronous traction motor being produced to vehicle wheel to driving vehicle.Owing to having used reduction gearing transmission device, thereby driving system structure is complicated, volume increases, weight increases, and operation maintenance cost is higher, and running noises is large, and transmission efficiency is lower.Directly driving is that motor and axletree are directly coupled together, and the torque that motor produces is directly delivered to vehicle wheel to upper without gear.Adopt direct drive mode, do not need gear drive, but motor speed reduces, torque increases, and motor volume will increase, and weight increases, to the impact of track and traction electric machine, all can increase, and on car body, the size of motor and weight are all subject to strict restriction, thereby it is very difficult with asynchronous machine, to realize directly driving.
Utility model content
The purpose of this utility model is: overcome the deficiencies in the prior art, provide a kind of simple in structure, small volume, weight light and can be easily with railcar wheel to being directly connected to realize the permanent magnet direct-drive traction electric machine of direct driving train.
The technical solution of the utility model is: permanent magnet direct-drive traction electric machine of the present utility model, comprises shell, stator, rotor and bearing assembly; Its design feature is: shell comprises support, left end cap and right end cap; Left end cap and right end cap are divided into the left and right sides of support and are sealedly and fixedly connected with support; The middle of left end cap and right end cap is equipped with left and right to the manhole connecting and inside outstanding bearing mounting base;
Stator comprises stator core and stator winding; Stator is fixedly mounted on the support of shell by its stator core;
Rotor comprises rotor core, permanent magnet, rotating shaft and axle key; Rotating shaft is the column member of hollow; Rotor core is entered rotating shaft and is connected and made rotor core and rotating shaft form one by axle key by a side pressure of rotating shaft; It is inner that permanent magnet embeds rotor core, is integral formula structure with rotor core;
Bearing assembly comprises left bearing, right bearing and bearing cap; The outer ring of left bearing is fixedly mounted on the bearing mounting base of left end cap of shell; The left side interference fit of the inner ring of left bearing and the rotating shaft of rotor is fixedly sleeved; The outer ring of right bearing is fixedly mounted on the bearing mounting base of right end cap of shell; The right side interference fit of the inner ring of right bearing and rotating shaft is fixedly sleeved; The middle part of bearing cap is provided with the manhole to perforation for the left and right with rotating shaft socket; Bearing cap is provided with 4, and these 4 bearings are placed on the left and right sides of left bearing and the left and right sides of right bearing respectively arranges respectively 1; The bearing cap interference fit of the left and right sides of left bearing is socketed in rotating shaft and is sealedly and fixedly connected with the left and right sides of the left end cap of shell; The bearing cap interference fit of the left and right sides of right bearing is socketed in rotating shaft and is sealedly and fixedly connected with the left and right sides of the right end cap of shell.
Further scheme is: the material of the permanent magnet of above-mentioned rotor is Nd-Fe-B; Rotating shaft is 45# forged steel integral piece.
Further scheme also has: the stator winding of above-mentioned stator is the double-deck short distance winding of three-phase.
The utlity model has positive effect: (1) permanent magnet direct-drive traction electric machine of the present utility model, take turns being directly connected with railcar by elastic coupling at its rotating shaft two ends, the torque that motor produces is directly delivered to vehicle wheel to upper without gear drive, can effectively save cost, reduces noise and improve transmission efficiency.(2) permanent magnet direct-drive traction electric machine of the present utility model, motor direct-drive wheel, has cancelled gear drive, and then has shortened the wheelbase of metro vehicle bogie, has improved the curve negotiation ability of bogie.(3) permanent magnet direct-drive traction electric machine of the present utility model, adopts high performance permanent magnetic materials, and the power density of motor obtains larger raising, compares with the asynchronous machine of same capability, and its volume and quality all significantly reduce.(4) permanent magnet direct-drive traction electric machine of the present utility model, rotor-exciting adopts permanent magnet, thereby there is no idle exciting current and copper loss of rotor, thereby power factor and efficiency higher.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present utility model, has also shown that the utility model is by the coupling annexation right with ground iron tyre in figure.
Reference numeral in above-mentioned accompanying drawing is as follows:
Shell 1, support 11, left end cap 12, right end cap 13,
Stator 2,
Rotor 3, rotor core 31, permanent magnet 32, rotating shaft 33, axle key 34,
Bearing assembly 4, left bearing 41, right bearing 42, bearing cap 43,
Axletree 5,
Elastic coupling 6,
Vehicle wheel is to 7, left wheel 71, right wheel 72.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
(embodiment 1)
See Fig. 1, the permanent magnet direct-drive traction electric machine of the present embodiment, is mainly comprised of shell 1, stator 2, rotor 3 and bearing assembly 4.
Shell 1 is comprised of support 11, left end cap 12 and right end cap 13.Left end cap 12 is arranged on the left side of support 11 and is sealedly and fixedly connected with support 11; Right end cap 13 is arranged on the right side of support 11 and is sealedly and fixedly connected with support 11.The middle of left end cap 12 and right end cap 13 is equipped with left and right to the manhole connecting and inside outstanding bearing mounting base.
Stator 2 is comprised of stator core and stator winding.The structure of stator 2 and the stator of normal asynchronous are basic identical, and stator core adopts high permeability, low-loss silicon steel plate packing to form; Stator winding is embedded in the groove of stator core; Stator 2 is arranged in shell 1, and stator 2 is fixedly mounted on the support 11 of shell 1 by its stator core.In order to reduce harmonic field and the negative effect thereof of winding, in the present embodiment, stator winding design becomes the double-deck short distance winding of three-phase, and it is connected three-phase alternating current and produces rotating magnetic field.
Rotor 3 is comprised of rotor core 31, permanent magnet 32, rotating shaft 33 and axle key 34.Rotor core 31 is formed by silicon steel plate packing; The material of permanent magnet 32 is high performance permanent magnetic materials, in the present embodiment, and preferred Nd-Fe-B.The cylinder that rotating shaft 33 is hollow; The outer surface of rotating shaft 33 is provided with for locating the shaft shoulder step of rotor core 31, and has keyway; The rotor core 31 laminating enters rotating shaft 33 to its locating shaft shoulder rank by rotating shaft 33 1 side pressures to be located, and by axle key 34, is connected and is made rotor core 31 and rotating shaft 33 form one; Permanent magnet 32 embeds rotor core 31 inside, is integral formula structure with rotor core 31.The magnetic structure of rotor 3 adopts built-in rotor magnetic structure; its advantage is that magnetic leakage factor is little; in rotating shaft 33, do not need to take every magnetic measure; simple in structure; the rear rotor 3 of permanent magnet 32 is installed not yielding; permanent magnet 32 layer that do not need protection, and this structure can provide the installing space of larger permanent magnet 32, thus can reduce the volume of motor.
Bearing assembly 4 is comprised of left bearing 41, right bearing 42 and bearing cap 43.The outer ring of left bearing 41 is fixedly mounted on the bearing mounting base of left end cap 12 of shell 1; The left side interference fit of the rotating shaft 33 of the inner ring of left bearing 41 and rotor 3 is fixedly sleeved; The outer ring of right bearing 42 is fixedly mounted on the bearing mounting base of right end cap 13 of shell 1; The right side interference fit of the inner ring of right bearing 42 and rotating shaft 33 is fixedly sleeved; The middle part of bearing cap 43 is provided with left and right to the manhole connecting, for being socketed rotating shaft 33; Bearing cap 43 is provided with 4, these 4 bearing caps 43 in the left and right sides of left bearing 41 and the left and right sides of right bearing 42 respectively arrange respectively 1; Bearing cap 43 interference fit of the left and right sides of left bearing 41 are socketed in rotating shaft 33 and are sealedly and fixedly connected with the left and right sides of the left end cap 12 of shell 1; Bearing cap 43 interference fit of the left and right sides of right bearing 42 are socketed in rotating shaft 33 and are sealedly and fixedly connected with the left and right sides of the right end cap 13 of shell 1.
Still see Fig. 1, the permanent magnet direct-drive traction electric machine of the present embodiment in use, is placed in the middle part of the axletree of railcar 5 in the rotating shaft 33 of rotor 3; The left end of axletree 5 and vehicle wheel are fixedly connected with 7 left wheel 71; The right-hand member of axletree 5 and vehicle wheel are fixedly connected with 7 right wheel 72; The left end of the rotating shaft 33 of rotor 3 is by 1 elastic coupling 6 and left wheel 71 driving coupling; The right-hand member of rotating shaft 33 passes through 1 elastic coupling 6 and right wheel 72 driving coupling, thereby completes the application installation of the permanent magnet direct-drive traction electric machine of the present embodiment.
The two ends of the rotating shaft 33 of the rotor 3 of the permanent magnet direct-drive traction electric machine of the present embodiment are connected 7 with vehicle wheel by elastic coupling 6, and when there is side knock, elastic coupling 6 can effectively reduce the impact to track and traction electric machine.
To sum up, the permanent magnet direct-drive traction electric machine of the present embodiment, the two ends of the rotating shaft 33 of its rotor 3 are connected 7 with vehicle wheel by elastic coupling 6, and when there is side knock, elastic coupling 6 can effectively reduce the impact to track and traction electric machine; The two ends of rotating shaft 33 are directly connected 7 by elastic coupling 6 and railcar wheel, and the torque that motor produces is directly delivered to vehicle wheel on 7 without gear drive, can effectively save cost, reduction noise and raising transmission efficiency; Motor direct-drive wheel, has cancelled gear drive, and then has shortened the wheelbase of metro vehicle bogie, has improved the curve negotiation ability of bogie; Rotor 3 adopts high performance permanent magnetic materials, and the power density of motor obtains larger raising, compares with the asynchronous machine of same capability, and its volume and quality all significantly reduce; There is no idle exciting current and copper loss of rotor, thus power factor and efficiency higher.
Above embodiment is the explanation to embodiment of the present utility model; but not to restriction of the present utility model; person skilled in the relevant technique is not in the situation that departing from spirit and scope of the present utility model; can also make various conversion and variation and obtain the corresponding technical scheme being equal to, therefore all technical schemes that are equal to all should be included into scope of patent protection of the present utility model.
Claims (3)
1. a permanent magnet direct-drive traction electric machine, comprises shell (1), stator (2), rotor (3) and bearing assembly (4); It is characterized in that: described shell (1) comprises support (11), left end cap (12) and right end cap (13); Left end cap (12) and right end cap (13) are divided into the left and right sides of support (11) and are sealedly and fixedly connected with support (11); The middle of left end cap (12) and right end cap (13) is equipped with left and right to the manhole connecting and inside outstanding bearing mounting base;
Stator (2) comprises stator core and stator winding; Stator (2) is fixedly mounted on the support (13) of shell (1) by its stator core;
Rotor (3) comprises rotor core (31), permanent magnet (32), rotating shaft (33) and axle key (34); The column member that rotating shaft (33) is hollow; Rotor core (31) is entered rotating shaft (33) and is connected and made rotor core (31) and rotating shaft (33) form one by axle key (34) by a side pressure of rotating shaft (33); Permanent magnet (32) embeds rotor core (31) inside, is integral formula structure with rotor core (31);
Bearing assembly (4) comprises left bearing (41), right bearing (42) and bearing cap (43); The outer ring of left bearing (41) is fixedly mounted on the bearing mounting base of left end cap (12) of shell (1); The left side interference fit of the rotating shaft (33) of the inner ring of left bearing (41) and rotor (3) is fixedly sleeved; The outer ring of right bearing (42) is fixedly mounted on the bearing mounting base of right end cap (13) of shell (1); The right side interference fit of the inner ring of right bearing (42) and rotating shaft (33) is fixedly sleeved; The middle part of bearing cap (43) is provided with the manhole to perforation for the left and right with rotating shaft (33) socket; Bearing cap (43) is provided with 4, these 4 bearing caps (43) in the left and right sides of left bearing (41) and the left and right sides of right bearing (42) respectively arrange respectively 1; It is upper and be sealedly and fixedly connected with the left and right sides of the left end cap (12) of shell (1) that bearing cap (43) interference fit of the left and right sides of left bearing (41) is socketed in rotating shaft (33); It is upper and be sealedly and fixedly connected with the left and right sides of the right end cap (13) of shell (1) that bearing cap (43) interference fit of the left and right sides of right bearing (42) is socketed in rotating shaft (33).
2. permanent magnet direct-drive traction electric machine according to claim 1, is characterized in that: the material of the permanent magnet (32) of described rotor (3) is Nd-Fe-B; Rotating shaft (33) is 45# forged steel integral piece.
3. permanent magnet direct-drive traction electric machine according to claim 1, is characterized in that: the stator winding of described stator (2) is the double-deck short distance winding of three-phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320520211.9U CN203456961U (en) | 2013-08-23 | 2013-08-23 | Permanent-magnet direct-driven traction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320520211.9U CN203456961U (en) | 2013-08-23 | 2013-08-23 | Permanent-magnet direct-driven traction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203456961U true CN203456961U (en) | 2014-02-26 |
Family
ID=50136812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320520211.9U Expired - Lifetime CN203456961U (en) | 2013-08-23 | 2013-08-23 | Permanent-magnet direct-driven traction motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203456961U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849516A (en) * | 2017-03-23 | 2017-06-13 | 康为同创集团有限公司 | Permanent magnet direct-drive traction electric machine and track train |
| CN110962873A (en) * | 2018-09-28 | 2020-04-07 | 中车大同电力机车有限公司 | High-power permanent magnet direct-drive bogie and rapid passenger locomotive |
-
2013
- 2013-08-23 CN CN201320520211.9U patent/CN203456961U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849516A (en) * | 2017-03-23 | 2017-06-13 | 康为同创集团有限公司 | Permanent magnet direct-drive traction electric machine and track train |
| CN110962873A (en) * | 2018-09-28 | 2020-04-07 | 中车大同电力机车有限公司 | High-power permanent magnet direct-drive bogie and rapid passenger locomotive |
| CN110962873B (en) * | 2018-09-28 | 2021-02-02 | 中车大同电力机车有限公司 | High-power permanent magnet direct-drive bogie and rapid passenger locomotive |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 213022 Jiangsu city of Changzhou province Hehai West New District No. 300 Patentee after: Changzhou Changqing Technology Co.,Ltd. Address before: 213022 Jiangsu city of Changzhou province Hehai West New District No. 300 Patentee before: CHANGZHOU CHANGQING TRAFFIC TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |
|
| CX01 | Expiry of patent term |