CN202142925U - Motor rotor and motor with same - Google Patents
Motor rotor and motor with same Download PDFInfo
- Publication number
- CN202142925U CN202142925U CN201120284936U CN201120284936U CN202142925U CN 202142925 U CN202142925 U CN 202142925U CN 201120284936 U CN201120284936 U CN 201120284936U CN 201120284936 U CN201120284936 U CN 201120284936U CN 202142925 U CN202142925 U CN 202142925U
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- Prior art keywords
- iron core
- motor
- mounting groove
- rotor
- motor rotor
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 32
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 abstract 3
- 239000003351 stiffener Substances 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model provides a motor rotor and have its motor. According to the utility model discloses a motor rotor, including the iron core and locating the permanent magnet in the iron core, be provided with the multiunit mounting groove on the iron core along the circumference direction of iron core, every group mounting groove includes two or more than two mounting grooves that are interrupted the setting in the radial direction of iron core; the permanent magnets in each group of permanent magnets are correspondingly embedded into the mounting grooves of each group of mounting grooves; an island-shaped area is arranged between the mounting groove of the outermost layer and the periphery of the iron core, a reinforcing hole is formed in the island-shaped area, and a reinforcing rod is arranged in the reinforcing hole. According to the utility model discloses an electric motor, including motor stator and the aforementioned motor rotor, motor rotor sets up the inboard at motor stator. The utility model discloses an electric motor rotor through set up on island shape region strengthen the hole and set up the stiffener in strengthening the hole, has reinforceed the structural strength of whole rotor, has promoted the performance of motor.
Description
Technical field
The utility model relates to electric motors, more specifically, relates to a kind of motor rotor and has its motor.
Background technology
Permanent magnetism assist type synchronous reluctance motor is as a kind of novel magneto; It has combined the advantage of magneto and synchronous magnetic resistance motor; Have advantages such as power density height, speed-regulating range width, efficient are high, volume is little; It is very outstanding in the application prospect that speed governing drives the field, and the formula of its electromagnetic torque is following:
T＝mp(L
q-L
d)i
di
q+mpψ
pMi
q。
In the above-mentioned formula, T is a motor output torque, improves the value of T, can improve motor performance; First behind the T in the equality is reluctance torque, and second is permanent-magnet torque; Ψ
PMThe maximum of the rotor coupling magnetic flux that produces for motor permanent magnet, m is the number of phases of stator conductors, L
d, L
qBe respectively d axle and q axle inductance, wherein the d axle refers to and the axle of main pole dead in line, and the q axle refers to the axle with the main pole axis normal, wherein vertically refer to electrical degree; i
d, i
qBe respectively the component of armature supply on d axle, q direction of principal axis.
Mainly improve motor performance in the prior art, promptly improve the value of synthetic torque, and then improve motor efficiency through the way that improves permanent-magnet torque through the performance that improves permanent magnet.Common way is exactly built-in rare-earth permanent magnet.But because rare earth is non-renewable resources, and costs an arm and a leg, so this kind motor is used widely and is restricted.In addition, only improve motor performance, also can't satisfy an urgent demand of further raising motor efficiency by improving permanent magnet performance.In addition, in motor, insert permanent magnet, rotor is when running up, and rotor edge can draw high distortion even rupture.
The utility model content
The utility model purpose is to provide a kind of motor rotor of the structural strength that improves motor rotor and has its motor.
An aspect according to the utility model; A kind of motor rotor is provided; Comprise the permanent magnet inner unshakable in one's determination with being located at iron core; Upper edge unshakable in one's determination circumferential direction unshakable in one's determination is provided with many group mounting grooves, and every group of mounting groove comprises two or more mounting grooves that is interrupted setting in the radial direction at iron core; Permanent magnet is many groups, and each permanent magnet in every group of permanent magnet embeds in each mounting groove of every group of mounting groove accordingly; Have the island-shaped area territory between the periphery of outermost mounting groove and iron core, island-shaped area has reinforced hole on the territory, is provided with bracing piece in the reinforced hole, connects through girth member between the end of each bracing piece.
Further, reinforced hole is for being arranged on epitrochanterian through hole, and bracing piece is a rivet, and rivet passes through hole and rivets mutually with girth member.
Further, all be provided with reinforced hole on the island-shaped area territory of every group of mounting groove.
Further, girth member is the fixed dam that is arranged on two ends unshakable in one's determination, and bracing piece passes reinforced hole and is connected with fixed dam.
Further, from the peripheral direction of iron core, the edge of each mounting groove of every group increases with the distance L of the periphery of iron core gradually.
Further, when every group of mounting groove had two-layer mounting groove, from the peripheral direction of iron core, the edge of outermost mounting groove and the mounting groove that is adjacent was respectively La and Lb with the distance of periphery unshakable in one's determination, wherein: 2La >=Lb >=1.1La.
Further, every group of mounting groove comprises three or the mounting groove that is interrupted setting in the radial direction at iron core more than three.
Further, begin direction from inside to outside, from being respectively Lc, Lb and La, wherein: 2Lb >=Lc >=1.2Lb, 2La >=Lb >=1.1La near the distance of the edge of three outside mounting grooves of the mounting groove in the center of circle and periphery unshakable in one's determination from the center of circle of iron core.
An aspect according to the utility model also provides a kind of motor, comprises motor stator and aforesaid motor rotor, and motor rotor is arranged on the inboard of motor stator.
Further, motor also comprises fixed dam, and rivet passes fixed dam with unshakable in one's determination and be connected fixed dam and rotor.
Further, the spacing between the interior week of motor stator and the periphery of motor rotor is n, wherein, and 0.35mm≤n≤0.55mm.
Adopt the motor rotor of the utility model and have its motor; Form the island-shaped area territory between the outermost layer mounting groove of motor rotor and the periphery unshakable in one's determination; On the island-shaped area territory, reinforced hole is set, and in reinforced hole, bracing piece is set, thereby strengthen the structural strength of whole rotor.Under the situation that does not change the rotor flux path, through reinforced hole and bracing piece are set, greatly strengthened rotor structure intensity on rotor, reduce the deformation quantity of lower rotor part that runs up, thereby realized minimizing of rotor gap, promote motor properties.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the structural representation according to the motor rotor of the utility model;
Fig. 2 is according to the motor rotor of the utility model stress distribution situation when the high speed rotating;
Fig. 3 is the partial structurtes sketch map according to the motor rotor of the utility model;
Fig. 4 is the reinforcement sketch map according to the motor rotor of the utility model;
Fig. 5 is according to the motor rotor of the utility model distortion situation the high speed rotating time;
Fig. 6 is the stator and rotor sructure sketch map according to the motor of the utility model.
Embodiment
Below with reference to accompanying drawing and combine embodiment to specify the utility model.
Motor rotor according to the utility model; Comprise unshakable in one's determination 10 be located at unshakable in one's determination 10 inner permanent magnets 20, the circumferential direction of 10 upper edges unshakable in one's determination unshakable in one's determination 10 is provided with many group mounting grooves 30, every group of mounting groove 30 comprises two-layer or two-layer above at unshakable in one's determination 10 the mounting groove that is interrupted setting in the radial direction 30; Permanent magnet 20 is many groups; Each permanent magnet 20 in every group of permanent magnet 20 embeds in each mounting groove 30 of every group of mounting groove 30 accordingly, has island-shaped area territory 12 between outermost mounting groove 30 and unshakable in one's determination 10 the periphery, has reinforced hole 13 on the island-shaped area territory 12; Be provided with bracing piece 60 in the reinforced hole 13, connect through girth member between the end of each bracing piece 60.
As shown in figures 1 and 3, form island-shaped area territory 12 between the outermost layer mounting groove 30 of motor rotor and 10 peripheries unshakable in one's determination.Because it is the type zone, island of outermost layer groove that Fig. 5 shows the maximum place of rotor deflection; The line of symmetry setting of permanent magnet mounting groove such as Fig. 3 and reinforced hole 13 shown in Figure 4 on the 12 upper edge rotors of island-shaped area territory; And bracing piece 60 is set therein; And pass through the end that girth member connects each bracing piece 60, thereby strengthen the structural strength of whole rotor.On the island-shaped area territory 12 of every group of mounting groove 30 reinforced hole 13 can be set, with further reinforcement rotor structure intensity.Therefore, do not change under the situation in rotor flux path, through reinforced hole 13 and bracing piece 60 are set on rotor; Greatly strengthened rotor structure intensity; Reduce the deformation quantity of lower rotor part that runs up, thereby realized minimizing of rotor gap, promoted motor properties.Preferably, girth member is the fixed dam 70 that is arranged on 10 two ends unshakable in one's determination, and bracing piece 60 passes said reinforced hole 13 and is connected with fixed dam 70.
In order further to strengthen the mechanical strength of rotor, reinforced hole 13 is for being arranged on epitrochanterian through hole, and bracing piece 60 is a rivet, and rivet passes through hole and rivets mutually with girth member.
The reinforced hole 13 that connects rotor is set on the line of symmetry direction of the mounting groove 30 of rotor, rivets mutually with girth member through the rivet that passes reinforced hole 13.Preferably; As shown in Figure 4; Both ends in rotor core 10 increase fixed dam 70, and rivet passes the fixed dam 70 and epitrochanterian island-shaped area territory 12 at two ends, and fixed dam 70 and rotor are riveted tightly to be connected is connected into an integral body; Because the restriction of the rivet that connects, the distortion in island-shaped area territory will receive strict restriction more.Thereby further improved the mechanical strength of rotor.In other embodiments, bracing piece 60 also can be bolt, and is threaded with reinforced hole 13.
As shown in Figure 1; When rotor high-speed rotated, the centrifugal force that every layer of permanent magnet 20 produced was respectively F1, F2 and F3, and direction is along the rotor radius direction; Centrifugal force acts on every layer of permanent magnet 20 next-door neighbours' arc silicon steel sheet part respectively, like arrow indication zone among Fig. 1.Wherein, 40a, 40b and 40c are respectively the separated magnetic bridge of every layer of permanent magnet groove and rotor outer peripheral face intersection, play the effect that connects every layer of mounting groove 30 at a distance from magnetic bridge, are responsible for intercepting the leakage field of every layer of permanent magnet 20 end simultaneously again.F1, F2, F3 are final and that 40a, 40b and 40c bear, and reversal interlocking relay balances each other.Stress cloud atlas when Fig. 2 rotates for rotor high-speed can be seen at a distance from magnetic bridge 40c and partly having born than 40a and the big many stress of 40b, is distortion and the most incidental place of fracture.
The deflection of rotor edge depends on the width of rotor periphery at a distance from magnetic bridge 40; High at a distance from magnetic bridge 40 wide then mechanical strengths; Thereby motor can be worked under higher rotating speed; Increase but negative effect is the magnetic leakage of permanent magnet 20 ends, thereby can reduce the useful flux in stator and the rotor, cause motor performance to descend.
The separated magnetic bridge that the utility model has passed through optimal design mounting groove 30 and rotor periphery form; The special structure that has multilayer to every group of mounting groove; Width at a distance from magnetic bridge 40 has carried out different designs, will be arranged to gradient distribution at a distance from the magnetic bridge width, and is as shown in Figure 6; Peripheral direction from unshakable in one's determination 10 is towards the direction of its center of rotation, and the edge of each mounting groove 30 of every group increases with the distance L of the periphery of iron core 10 gradually.
When every group of mounting groove 30 has two-layer permanent magnet 20, the peripheral direction from unshakable in one's determination 10, the edge of outermost mounting groove 30 and the mounting groove 30 that is adjacent is respectively La and Lb with the distance of unshakable in one's determination 10 periphery, wherein: 2La >=Lb >=1.1La.
As shown in Figure 6; When every group of mounting groove 30 comprise three or more than three unshakable in one's determination 10 be interrupted the mounting groove 30 of setting in the radial direction the time; Peripheral direction from unshakable in one's determination 10; Be respectively La, Lb and Lc from the distance of the edge of three inside mounting grooves 30 of outermost mounting groove 30 and unshakable in one's determination 10 periphery, wherein: 2Lb >=Lc >=1.2Lb, 2La >=Lb >=1.1La.
Fig. 5 is the deformation form under the rotor high-speed rotation; As scheme to show that (dotted line is the structure under the stationary rotor state; Solid line is distortion back structure) maximum in the island-shaped area area deformation amount of outermost layer magnet steel; Be that rotor in the axis of symmetry direction of mounting groove 30 stretcher strain has taken place, but the L value can make deflection be controlled at below the 20 μ m after satisfying above-mentioned relation, and also be controlled in the safe scope at a distance from the stress of magnetic bridge 40c.
By on can know; When every group of mounting groove 30 comprise three layers or more than three layers unshakable in one's determination 10 be interrupted the mounting groove 30 of setting in the radial direction the time, the distance of the edge of mounting groove 30 and unshakable in one's determination 10 periphery is suitable for aforesaid 2La >=Lb >=1.1La (this moment is from being respectively Lb, La near the distance of the edge of outside preceding two mounting grooves 30 of the mounting groove in the center of circle 30 and unshakable in one's determination 10 periphery) too.Two number ranges limit and can separately implement in the case, also can Joint Implementation, can effectively improve the mechanical strength of rotor, and reduce the deflection of rotor when high-speed cruising.
The utility model also provides a kind of motor, comprises motor stator 50 and aforesaid motor rotor, and motor rotor is arranged on the inboard of motor stator 50.Motor also comprises fixed dam 70, and rivet passes fixed dam 70 and unshakable in one's determination 10 and be connected fixed dam 70 and rotor.Spacing between the interior week of motor stator 50 and the periphery of motor rotor is n, wherein, and 0.35mm≤n≤0.55mm.
The deflection of rotor edge depends on the width of rotor periphery at a distance from magnetic bridge, can be operated in higher rotating speed at a distance from the high motor of the wide then mechanical strength of magnetic bridge, increases but negative effect is the permanent magnet brow leakage, and electric efficiency descends.The utility model optimal design the magnetic bridge that forms of magnet steel groove and rotor periphery, to sandwich construction, the magnetic bridge width is changed in gradient, effectively improves the mechanical strength of rotor especially, reduces the deflection of rotor when high-speed cruising.
In addition, 12 places are provided with reinforced hole in mounting groove 30 outermost island-shaped area territories, and iron core 10 both ends of rotor increase fixed dam 70, are suitable for fixed dam 70 and island-shaped area territory that bolt or rivet pass two ends, and iron core 10 and fixed dam 70 are tightened to one.The utility model has greatly been strengthened rotor structure intensity under the situation that does not change the rotor flux path, reduced the deformation quantity of lower rotor part that runs up, thereby realized minimizing of rotor gap, has promoted motor properties.
Therefore, previous designs has the rotor of the embedded magnet structure of multilayer and the spacing n of stator 50 designs forr a short time, and the loss of magnetic flux just reduces thus, and motor properties can get a promotion.When 0.35mm≤n≤0.55mm, motor properties and deflection are to satisfy reliability requirement according to the test result of reality.
From above description, can find out that the utility model the above embodiments have realized following technique effect:
The motor rotor of the utility model and have its motor; The clear and definite characteristic of rotor each magnetic bridge width under magnetic bridge width desired value and multilayer situation; And adopt the two ends fixed dam to run through the mode that is connected one with rotor core outermost layer island-shaped area territory, and strengthened rotor structure intensity, improved the reliability of rotor; Make the rotor air gap of motor can do forr a short time, improved motor properties.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (11)
1. a motor rotor comprises iron core (10) and is located at the inner permanent magnet (20) of said iron core (10), it is characterized in that,
The circumferential direction of the said iron core in said iron core (10) upper edge (10) is provided with many group mounting grooves (30), and every group of said mounting groove (30) comprises two or more mounting grooves that is interrupted setting in the radial direction (30) at said iron core (10);
Said permanent magnet (20) is many groups, and each permanent magnet (20) in every group of said permanent magnet (20) embeds in each said mounting groove (30) of every group of mounting groove (30) accordingly;
Has island-shaped area territory (12) between the periphery of outermost said mounting groove (30) and said iron core (10); Has reinforced hole (13) on the said island-shaped area territory (12); Be provided with bracing piece (60) in the said reinforced hole (13), connect through girth member between the end of each said bracing piece (60).
2. motor rotor according to claim 1 is characterized in that, said reinforced hole (13) is for being arranged on said epitrochanterian through hole, and said bracing piece (60) is a rivet, and said rivet passes said through hole and rivets mutually with said girth member.
3. motor rotor according to claim 1 is characterized in that, all is provided with reinforced hole (13) on the island-shaped area territory (12) of every group of said mounting groove (30).
4. motor rotor according to claim 1 is characterized in that, said girth member is for being arranged on the fixed dam (70) at said iron core (10) two ends, and said bracing piece (60) passes said reinforced hole (13) and is connected with said fixed dam (70).
5. motor rotor according to claim 1 is characterized in that, from the peripheral direction of said iron core (10), the distance L of the periphery of the edge of the said mounting groove of each of every group (30) and said iron core (10) increases gradually.
6. motor rotor according to claim 5; It is characterized in that; When every group of said mounting groove (30) has two-layer mounting groove; From the peripheral direction of said iron core (10), the distance of the edge of outermost mounting groove (30) and the said mounting groove (30) that is adjacent and the periphery of said iron core (10) is respectively La and Lb, wherein: 2La >=Lb >=1.1La.
7. motor rotor according to claim 5 is characterized in that, every group of said mounting groove (30) comprises three or the mounting groove that is interrupted setting in the radial direction (30) at said iron core (10) more than three.
8. motor rotor according to claim 7; It is characterized in that; Begin direction from inside to outside from the center of circle of said iron core (10); From being respectively Lc, Lb and La near the distance of the periphery of the edge of outside three the said mounting grooves (30) of the mounting groove (30) in the center of circle and said iron core (10), wherein: 2Lb >=Lc >=1.2Lb, 2La >=Lb >=1.1La.
9. a motor is characterized in that, comprises each described motor rotor in motor stator (50) and the claim 2 to 8, and said motor rotor is arranged on the inboard of said motor stator (50).
10. motor according to claim 9 is characterized in that, also comprises fixed dam (70), and said rivet passes said fixed dam (70) with said iron core (10) and be connected said fixed dam (70) and said rotor.
11. motor according to claim 9 is characterized in that, the spacing between the interior week of said motor stator (50) and the periphery of said motor rotor is n, wherein, and 0.35mm≤n≤0.55mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120284936U CN202142925U (en) | 2011-08-05 | 2011-08-05 | Motor rotor and motor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120284936U CN202142925U (en) | 2011-08-05 | 2011-08-05 | Motor rotor and motor with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202142925U true CN202142925U (en) | 2012-02-08 |
Family
ID=45553963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120284936U Expired - Lifetime CN202142925U (en) | 2011-08-05 | 2011-08-05 | Motor rotor and motor with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202142925U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769367A (en) * | 2012-03-05 | 2012-11-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet assisted synchronous reluctance motor and its installation method |
| CN102790456A (en) * | 2012-03-05 | 2012-11-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet auxiliary synchronized reluctance motor rotor iron core, motor and assembling method of motor |
| CN102801235A (en) * | 2011-08-05 | 2012-11-28 | 珠海格力电器股份有限公司 | Motor rotor and motor with same |
| WO2013020312A1 (en) * | 2011-08-05 | 2013-02-14 | 珠海格力电器股份有限公司 | Motor rotor and motor having same |
| CN103457372A (en) * | 2012-05-30 | 2013-12-18 | 通用汽车环球科技运作有限责任公司 | Bi-permanent magnets in synchronous machines |
| CN111541323A (en) * | 2020-04-10 | 2020-08-14 | 珠海格力节能环保制冷技术研究中心有限公司 | Reluctance motor and rotor thereof |
| USD960086S1 (en) | 2017-07-25 | 2022-08-09 | Milwaukee Electric Tool Corporation | Battery pack |
| US11780061B2 (en) | 2019-02-18 | 2023-10-10 | Milwaukee Electric Tool Corporation | Impact tool |
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2011
- 2011-08-05 CN CN201120284936U patent/CN202142925U/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9502930B2 (en) | 2011-08-05 | 2016-11-22 | Gree Electric Appliances, Inc. Of Zhuhai | Motor rotor and motor having same |
| CN102801235A (en) * | 2011-08-05 | 2012-11-28 | 珠海格力电器股份有限公司 | Motor rotor and motor with same |
| WO2013020312A1 (en) * | 2011-08-05 | 2013-02-14 | 珠海格力电器股份有限公司 | Motor rotor and motor having same |
| WO2013020310A1 (en) * | 2011-08-05 | 2013-02-14 | 珠海格力电器股份有限公司 | Motor rotor and motor having same |
| CN102801235B (en) * | 2011-08-05 | 2013-09-18 | 珠海格力电器股份有限公司 | Motor rotor and motor with same |
| US9502934B2 (en) | 2011-08-05 | 2016-11-22 | Gree Electric Appliances, Inc. Of Zhuhai | Motor rotor and motor having same |
| CN102790456A (en) * | 2012-03-05 | 2012-11-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet auxiliary synchronized reluctance motor rotor iron core, motor and assembling method of motor |
| CN102769367B (en) * | 2012-03-05 | 2013-08-14 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet assisted synchronous reluctance motor and installation method thereof |
| CN102769367A (en) * | 2012-03-05 | 2012-11-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet assisted synchronous reluctance motor and its installation method |
| CN103457372B (en) * | 2012-05-30 | 2016-09-28 | 通用汽车环球科技运作有限责任公司 | Dual permanent-magnet in synchronous motor |
| CN103457372A (en) * | 2012-05-30 | 2013-12-18 | 通用汽车环球科技运作有限责任公司 | Bi-permanent magnets in synchronous machines |
| USD960086S1 (en) | 2017-07-25 | 2022-08-09 | Milwaukee Electric Tool Corporation | Battery pack |
| US11462794B2 (en) | 2017-07-25 | 2022-10-04 | Milwaukee Electric Tool Corporation | High power battery-powered system |
| US11476527B2 (en) | 2017-07-25 | 2022-10-18 | Milwaukee Electric Tool Corporation | High power battery-powered system |
| USD1035566S1 (en) | 2017-07-25 | 2024-07-16 | Milwaukee Electric Tool Corporation | Battery pack |
| US11780061B2 (en) | 2019-02-18 | 2023-10-10 | Milwaukee Electric Tool Corporation | Impact tool |
| US12544885B2 (en) | 2019-02-18 | 2026-02-10 | Milwaukee Electric Tool Corporation | Impact tool |
| CN111541323A (en) * | 2020-04-10 | 2020-08-14 | 珠海格力节能环保制冷技术研究中心有限公司 | Reluctance motor and rotor thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120208 Effective date of abandoning: 20130918 |
|
| RGAV | Abandon patent right to avoid regrant |