CN202872490U - Electric automobile permanent magnet reluctance motor rotor magnetism gathering structure - Google Patents
Electric automobile permanent magnet reluctance motor rotor magnetism gathering structure Download PDFInfo
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- CN202872490U CN202872490U CN201220584421XU CN201220584421U CN202872490U CN 202872490 U CN202872490 U CN 202872490U CN 201220584421X U CN201220584421X U CN 201220584421XU CN 201220584421 U CN201220584421 U CN 201220584421U CN 202872490 U CN202872490 U CN 202872490U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The utility model relates to an electric automobile permanent magnet reluctance motor rotor magnetism gathering structure which includes a rotor iron core and a first strip-like permanent magnet, a second strip-like permanent magnet, a third strip-like permanent magnet, and a fourth strip-like permanent magnet which are arranged in the rotor iron core. One end of the second strip-like permanent magnet and one end of the third strip-like permanent magnet which approach to the inner surface of the rotor iron core are close to each other, and the other end of the second strip-like permanent magnet and the other end of the third strip-like permanent magnet which approach to the outer surface of the rotor iron core are far away from each other. The fourth strip-like permanent magnet is arranged below one end of the second strip-like permanent magnet and one end of the third strip-like permanent magnet which approach to the inner surface of the rotor iron core. The first strip-like permanent magnet is close to the outer surface of the rotor iron core and is arranged between the second strip-like permanent magnet and the third strip-like permanent magnet. The electric automobile permanent magnet reluctance motor rotor magnetism gathering structure reduces the motor production cost, increases the ratio of the motor air gap magnetic flux density to the permanent magnet residual flux density, has the magnetism gathering capacity, reduces the magnetic leakage, increases the permanent magnet utilization rate, improves the salient pole rate and the motor performance, and at the same time, reduces the motor torque ripple, the motor iron consumption and the permanent magnet eddy current loss, and improves the motor efficiency, thus being suitable for large scale popularization and application.
Description
Technical field
The utility model relates to electric drive system for electric vehicles drive motors part technical field, and particularly used for electric vehicle magneto technical field specifically refers to a kind of used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure.
Background technology
Along with increasing sharply of automobile pollution in the global range, the aggravation of motor vehicle exhaust emission, the resource and environment problem of bringing thus becomes increasingly conspicuous, therefore in the world under each large universities and colleges scientific research institution and car load factory one after another the research and development of new-energy automobile as the scientific research emphasis.Power drive system is the core of electric automobile, and motor wherein is the heart of power drive system, and its performance directly affects vehicle performance.Permagnetic synchronous motor adopts permanent magnet excitation at rotor, has the power density height, efficient is high, the advantage that torque performance is good, these advantages have well met in the electric drive system for electric vehicles requirement to traction electric machine, therefore, permagnetic synchronous motor becomes the first-selected type in current power drive system research and the application.As a complete unit, the most frequently used is surface-type rotor structure and built-in rotor structure two large classes.
Therefore the built-in rotor structure becomes present automobile permanent magnet motor and uses more rotor structure because its reluctance torque is outstanding.But, the permanent magnet price that the automobile permanent magnet motor uses is higher, the motor manufacturing cost is large, there is leakage field in the built-in rotor permanent magnet of permanent magnet motor in rotor core simultaneously, cause the motor gas-gap magnetic flux density more much lower than permanent magnet residual magnetic flux density, cause at the bottom of the permanent magnet utilance, the automobile permanent magnet synchronous motor salient pole rate of conventional built-in rotor structure is little, be that motor friendship axle inductance and d-axis inductance ratio are little, cause permagnetic synchronous motor because the reluctance torque that Interior permanent magnet produces is little, motor performance descends.The built-in rotor magneto is when at a high speed weak magnetic operating mode, because the weak magnetic control system of the degree of depth so that the air-gap field waveform of motor seriously distort, cause torque pulsation large, the motor iron loss increases, decrease in efficiency, causes simultaneously the increase of permanent magnet eddy current loss, rotor heating, permanent magnet that irreversible demagnetization easily occurs.
At present, there is certain methods that built-in rotor structure is improved, though larger to other performance impact of motor after having certain effect to improve, and processing technology is complicated, is not suitable for batch production.
Therefore, for the problems referred to above and the defective that solves existence, need to provide a kind of used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure, adopt this structure, can reduce the motor manufacturing cost, increase the ratio of motor gas-gap magnetic flux density and permanent magnet residual magnetic flux density, have poly-magnetic energy power, reduce leakage field, increase the permanent magnet utilance, improve the salient pole rate, improve motor performance, simultaneously can reduce motor torque ripple, reduce motor iron loss and permanent magnet eddy current loss, improve electric efficiency.
The utility model content
The purpose of this utility model is to have overcome above-mentioned shortcoming of the prior art, a kind of used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure is provided, this used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure design is ingenious, simple for structure, can reduce the motor manufacturing cost, increase the ratio of motor gas-gap magnetic flux density and permanent magnet residual magnetic flux density, has poly-magnetic energy power, reduce leakage field, increase the permanent magnet utilance, improve the salient pole rate, improve motor performance, simultaneously motor torque ripple be can reduce, motor iron loss and permanent magnet eddy current loss reduced, improve electric efficiency, be suitable for large-scale promotion application.
To achieve these goals, used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure of the present utility model, comprise rotor core, be characterized in, described used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure also comprises the first strip permanent magnet, the second strip permanent magnet, the 3rd strip-shaped permanent-magnet body and the 4th strip-shaped permanent-magnet body, described the first strip permanent magnet, described the second strip permanent magnet, described the 3rd strip-shaped permanent-magnet body and described the 4th strip-shaped permanent-magnet body all are built in the described rotor core, the end of the inner surface of the close described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body is mutually close, the end of the outer surface of the close described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body mutually away from, described the 4th strip-shaped permanent-magnet body is near the inner surface of described rotor core and below between the end of the inner surface of close the described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body, the outer surface of the close described rotor core of described the first strip permanent magnet and between the end of the outer surface of the close described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body.
Preferably, described the first strip permanent magnet, described the second strip permanent magnet, described the 3rd strip-shaped permanent-magnet body and described the 4th strip-shaped permanent-magnet body are in-line.
Preferably, the two ends of described the first strip permanent magnet, described the second strip permanent magnet, described the 3rd strip-shaped permanent-magnet body and described the 4th strip-shaped permanent-magnet body are provided with the air magnet isolation tank.
More preferably, the border of the air magnet isolation tank of the end of close described the 4th strip-shaped permanent-magnet body of described the second strip permanent magnet is parallel with the border of the air magnet isolation tank of an end of described the 4th strip-shaped permanent-magnet body, and the border of the air magnet isolation tank of the end of close described the 4th strip-shaped permanent-magnet body of described the 3rd strip-shaped permanent-magnet body is parallel with the border of the air magnet isolation tank of the other end of described the 4th strip-shaped permanent-magnet body.
Preferably, described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body are symmetrically set.
More preferably, the axis of described the first strip permanent magnet and described the 4th strip-shaped permanent-magnet body is vertical with the symmetrical center line of described the 3rd strip-shaped permanent-magnet body with described the second strip permanent magnet.
Preferably, described the first strip permanent magnet is parallel with the axis of described the 4th strip-shaped permanent-magnet body and center line is identical, and described axis is vertical with described center line.
The beneficial effects of the utility model specifically are: used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure of the present utility model comprises rotor core, the first strip permanent magnet, the second strip permanent magnet, the 3rd strip-shaped permanent-magnet body and the 4th strip-shaped permanent-magnet body, described the first strip permanent magnet, described the second strip permanent magnet, described the 3rd strip-shaped permanent-magnet body and described the 4th strip-shaped permanent-magnet body all are built in the described rotor core, the end of the inner surface of the close described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body is mutually close, the end of the outer surface of the close described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body mutually away from, described the 4th strip-shaped permanent-magnet body is near the inner surface of described rotor core and below between the end of the inner surface of the close described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body, described the first strip permanent magnet is near the outer surface of described rotor core and between the end of the outer surface of the close described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body, design ingenious, simple for structure, can increase the ratio of motor gas-gap magnetic flux density and permanent magnet residual magnetic flux density, has poly-magnetic function, improve the permanent magnet utilance, increase and hand over the axle inductance with the ratio of d-axis inductance, improve Interior permanent magnet rotor with salient pole rate, increase the reluctance torque utilance, power density that can Effective Raise motor integral body, improve and torque capacity, reduce motor volume and quality, reduce complete vehicle weight, can reduce the air gap flux density irregularity of wave form, reduce motor torque ripple, thereby reduce electric automobile when low cruise shake and the noise in the high-speed cruising, improve level of comfort by bus, simultaneously can reduce the loss of electric machine, lifting motor efficient, reach the effect that reduces the motor manufacturing cost and improve the service behaviour of motor, be suitable for large-scale promotion application.
Description of drawings
Fig. 1 is the structural representation of a specific embodiment of the present utility model.
Embodiment
In order more clearly to understand technology contents of the present utility model, describe in detail especially exemplified by following examples.Wherein identical parts adopt identical Reference numeral.
See also shown in Figure 1, used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure of the present utility model comprises rotor core 9, the first strip permanent magnet 1, the second strip permanent magnet 2, the 3rd strip-shaped permanent-magnet body 3 and the 4th strip-shaped permanent-magnet body 4, described the first strip permanent magnet 1, described the second strip permanent magnet 2, described the 3rd strip-shaped permanent-magnet body 3 and described the 4th strip-shaped permanent-magnet body 4 all are built in the described rotor core 9, the end of the inner surface of the close described rotor core 9 of described the second strip permanent magnet 2 and described the 3rd strip-shaped permanent-magnet body 3 is mutually close, the end of the outer surface of the close described rotor core 9 of described the second strip permanent magnet 2 and described the 3rd strip-shaped permanent-magnet body 3 mutually away from, described the 4th strip-shaped permanent-magnet body 4 is near the inner surface of described rotor cores 9 and below between the end of the inner surface of close the described rotor core 9 of described the second strip permanent magnet 2 and described the 3rd strip-shaped permanent-magnet body 3, the outer surface of described the first strip permanent magnet 1 close described rotor core 9 and between the end of the outer surface of the close described rotor core 9 of described the second strip permanent magnet 2 and described the 3rd strip-shaped permanent-magnet body 3.
Described the first strip permanent magnet 1, described the second strip permanent magnet 2, described the 3rd strip-shaped permanent-magnet body 3 and described the 4th strip-shaped permanent-magnet body 4 can adopt any suitable shape, can be identical, also can be different, in specific embodiment of the utility model, described the first strip permanent magnet 1, described the second strip permanent magnet 2, described the 3rd strip-shaped permanent-magnet body 3 and described the 4th strip-shaped permanent-magnet body 4 are in-line.Shape, polarity and the material of described the first strip permanent magnet 1, described the second strip permanent magnet 2, described the 3rd strip-shaped permanent-magnet body 3 and described the 4th strip-shaped permanent-magnet body 4 can be just the same.In order to reduce cost, all adopt lower-cost ferrite permanent-magnet materials.
In order to reduce leakage field, in specific embodiment of the utility model, the two ends of described the first strip permanent magnet 1, described the second strip permanent magnet 2, described the 3rd strip-shaped permanent-magnet body 3 and described the 4th strip-shaped permanent-magnet body 4 are provided with the air magnet isolation tank.
In order further to improve performance, see also shown in Figure 1, in specific embodiment of the utility model, the border 5 of the air magnet isolation tank of the end of close described the 4th strip-shaped permanent-magnet body 4 of described the second strip permanent magnet 2 is parallel with the border 6 of the air magnet isolation tank of an end of described the 4th strip-shaped permanent-magnet body 4, and the border 8 of the air magnet isolation tank of the end of close described the 4th strip-shaped permanent-magnet body 4 of described the 3rd strip-shaped permanent-magnet body 3 is parallel with the border 7 of the air magnet isolation tank of the other end of described the 4th strip-shaped permanent-magnet body 4.
Described the second strip permanent magnet 2 and described the 3rd strip-shaped permanent-magnet body 3 can be symmetrical arranged, also can asymmetricly arrange, see also shown in Figure 1ly, in specific embodiment of the utility model, described the second strip permanent magnet 2 and described the 3rd strip-shaped permanent-magnet body 3 are symmetrically set.Then the axis of described the first strip permanent magnet 1 and described the 4th strip-shaped permanent-magnet body 4 can be vertical with the symmetrical center line of described the 3rd strip-shaped permanent-magnet body 3 with described the second strip permanent magnet 2.
In order further to improve performance, see also shown in Figure 1ly, in specific embodiment of the utility model, described the first strip permanent magnet 1 is parallel with the axis of described the 4th strip-shaped permanent-magnet body 4 and center line is identical, and described axis is vertical with described center line.
The first strip permanent magnet 1, the second strip permanent magnet 2, the 3rd strip-shaped permanent-magnet body 3 and the 3rd strip-shaped permanent-magnet body 4 can along rotor core 9 axially be divided into four sections, fill respectively during assembling, reduced the difficulty of assembling and the cost of processing permanent magnet.
Therefore, every permanent magnet that extremely descends is block-shaped by four in the used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure of the present utility model, polarity and material be identical permanent magnet (i.e. the first strip permanent magnet 1 all, the second strip-shaped permanent-magnet, the 2 and the 3rd strip-shaped permanent-magnet body 3 and the 4th strip-shaped permanent-magnet body 4) form, permanent magnet is the in-line permanent magnet, wherein the first strip permanent magnet 1 is pressed close to the outer surface of rotor core 9, but guarantee the mechanical strength of rotor core 9, the second strip permanent magnet 2 and the 3rd strip-shaped permanent-magnet body 3 are arranged in v-shaped structure, but V-arrangement bottom is non-intersect, and the 4th strip-shaped permanent-magnet body 4 is arranged near the inner surface of rotor core 9 and below between the second strip permanent magnet 2 and the 3rd strip-shaped permanent-magnet body 3.The first strip permanent magnet 1 is arranged near the outer surface of rotor core 9 and between the second strip permanent magnet 2 and the 3rd strip-shaped permanent-magnet body 3.
The polar arc factor of permanent magnet, the size of air magnet isolation tank size is all analyzed by finite element software, the polar arc factor of permanent magnet, the arrangement of four permanent magnets and emulation mode are to guarantee that in-line permanent magnet (reach following " in-line permanent magnet " here and refer in particular to the first strip permanent magnet 1) polar arc factor is constant, change the V-arrangement permanent magnet (by the second strip permanent magnet 2, the 3rd strip-shaped permanent-magnet body 3 and the 4th strip-shaped permanent-magnet body 4 form) the polar arc factor, calculate the optimum polar arc factor of V-arrangement permanent magnet, in the constant situation of the optimum polar arc factor of V-arrangement permanent magnet, change in-line permanent magnet polar arc factor, determine the corresponding polar arc factor of last optimum air gap flux density.Air magnet isolation tank size will make leakage field reach minimum, but will consider simultaneously the requirement of saturated and mechanical strength.
The utlity model has following advantage:
1, by adopting in-line permanent magnet and V-arrangement permanent magnet combined structure, article four, permanent magnet all adopts low-cost ferrite permanent-magnet materials, reduce the motor manufacturing cost, can reduce leakage field, can increase the ratio of motor gas-gap magnetic flux density and permanent magnet residual magnetic flux density, have poly-magnetic function, promote the permanent magnet utilance
2, hand over the axle inductance with the ratio of d-axis inductance by adopting in-line permanent magnet and V-arrangement permanent magnet combined structure, increasing, improve Interior permanent magnet rotor with salient pole rate, increase the reluctance torque utilance, promoted motor performance.
3, by adopting in-line permanent magnet and V-arrangement permanent magnet combined structure, reduce the air gap flux density irregularity of wave form, reduce motor torque ripple, reduce the loss of electric machine, lifting motor efficient, reduce the operating torque pulsation of motor, thus reduce electric automobile when low cruise shake and the noise in the high-speed cruising, improve level of comfort by bus.
To sum up, the automobile-used low-cost permanent-magnet reluctance electrical machine rotor magnetism-collected structure design of the utility model is ingenious, simple for structure, can increase the ratio of motor gas-gap magnetic flux density and permanent magnet residual magnetic flux density, has poly-magnetic function, increase and hand over the axle inductance with the ratio of d-axis inductance, improve Interior permanent magnet rotor with salient pole rate, increase the reluctance torque utilance, reduce the air gap flux density irregularity of wave form, reduce motor torque ripple, reduce the loss of electric machine, lifting motor efficient has reached the effect that reduces the motor manufacturing cost and improve the service behaviour of motor, is suitable for large-scale promotion application.
In this specification, the utility model is described with reference to its specific embodiment.But, still can make various modifications and conversion obviously and not deviate from spirit and scope of the present utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (7)
1. used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure, comprise rotor core, it is characterized in that, described used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure also comprises the first strip permanent magnet, the second strip permanent magnet, the 3rd strip-shaped permanent-magnet body and the 4th strip-shaped permanent-magnet body, described the first strip permanent magnet, described the second strip permanent magnet, described the 3rd strip-shaped permanent-magnet body and described the 4th strip-shaped permanent-magnet body all are built in the described rotor core, the end of the inner surface of the close described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body is mutually close, the end of the outer surface of the close described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body mutually away from, described the 4th strip-shaped permanent-magnet body is near the inner surface of described rotor core and below between the end of the inner surface of close the described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body, the outer surface of the close described rotor core of described the first strip permanent magnet and between the end of the outer surface of the close described rotor core of described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body.
2. used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure according to claim 1 is characterized in that, described the first strip permanent magnet, described the second strip permanent magnet, described the 3rd strip-shaped permanent-magnet body and described the 4th strip-shaped permanent-magnet body are in-line.
3. used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure according to claim 1, it is characterized in that the two ends of described the first strip permanent magnet, described the second strip permanent magnet, described the 3rd strip-shaped permanent-magnet body and described the 4th strip-shaped permanent-magnet body are provided with the air magnet isolation tank.
4. used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure according to claim 3, it is characterized in that, the border of the air magnet isolation tank of the end of close described the 4th strip-shaped permanent-magnet body of described the second strip permanent magnet is parallel with the border of the air magnet isolation tank of an end of described the 4th strip-shaped permanent-magnet body, and the border of the air magnet isolation tank of the end of close described the 4th strip-shaped permanent-magnet body of described the 3rd strip-shaped permanent-magnet body is parallel with the border of the air magnet isolation tank of the other end of described the 4th strip-shaped permanent-magnet body.
5. used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure according to claim 1 is characterized in that, described the second strip permanent magnet and described the 3rd strip-shaped permanent-magnet body are symmetrically set.
6. used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure according to claim 5, it is characterized in that the axis of described the first strip permanent magnet and described the 4th strip-shaped permanent-magnet body is vertical with the symmetrical center line of described the 3rd strip-shaped permanent-magnet body with described the second strip permanent magnet.
7. used for electric vehicle permanent-magnet reluctance electrical machine rotor magnetism-collected structure according to claim 1 is characterized in that, described the first strip permanent magnet is parallel with the axis of described the 4th strip-shaped permanent-magnet body and center line is identical, and described axis is vertical with described center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220584421XU CN202872490U (en) | 2012-11-07 | 2012-11-07 | Electric automobile permanent magnet reluctance motor rotor magnetism gathering structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220584421XU CN202872490U (en) | 2012-11-07 | 2012-11-07 | Electric automobile permanent magnet reluctance motor rotor magnetism gathering structure |
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| Publication Number | Publication Date |
|---|---|
| CN202872490U true CN202872490U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220584421XU Expired - Fee Related CN202872490U (en) | 2012-11-07 | 2012-11-07 | Electric automobile permanent magnet reluctance motor rotor magnetism gathering structure |
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| CN (1) | CN202872490U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023421A (en) * | 2017-12-21 | 2018-05-11 | 珠海格力电器股份有限公司 | Motor rotor and permanent magnet motor |
| CN109905000A (en) * | 2019-04-23 | 2019-06-18 | 山东理工大学 | Radial and tangential permanent magnet magnetic pole mixed excitation electric machine method for production of rotor |
| CN110768426A (en) * | 2019-11-07 | 2020-02-07 | 南通大学 | High-speed high-torque permanent magnet synchronous motor rotor punching sheet and motor |
-
2012
- 2012-11-07 CN CN201220584421XU patent/CN202872490U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023421A (en) * | 2017-12-21 | 2018-05-11 | 珠海格力电器股份有限公司 | Motor rotor and permanent magnet motor |
| CN108023421B (en) * | 2017-12-21 | 2024-05-28 | 珠海格力电器股份有限公司 | Motor rotor and permanent magnet motor |
| CN109905000A (en) * | 2019-04-23 | 2019-06-18 | 山东理工大学 | Radial and tangential permanent magnet magnetic pole mixed excitation electric machine method for production of rotor |
| CN110768426A (en) * | 2019-11-07 | 2020-02-07 | 南通大学 | High-speed high-torque permanent magnet synchronous motor rotor punching sheet and motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20211107 |