US20080014102A1 - Fan and selecting method for motor size thereof - Google Patents
Fan and selecting method for motor size thereof Download PDFInfo
- Publication number
- US20080014102A1 US20080014102A1 US11/822,246 US82224607A US2008014102A1 US 20080014102 A1 US20080014102 A1 US 20080014102A1 US 82224607 A US82224607 A US 82224607A US 2008014102 A1 US2008014102 A1 US 2008014102A1
- Authority
- US
- United States
- Prior art keywords
- fan
- frame
- stator structure
- dimension
- impeller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000004907 flux Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
- F04D25/0646—Details of the stator
Definitions
- the invention relates to a fan and the method for selecting the motor size thereof.
- the invention relates to a method for selecting matching, corresponding fan and motor sizes to achieve optimal efficiency.
- a conventional fan 3 includes a frame 31 , an impeller 32 , and a motor 33 .
- the impeller 32 is accommodated in the frame 31 , and includes a hub 321 and several blades 322 disposed around the hub 321 .
- the motor 33 connects to the hub 321 and drives the blades 32 .
- the motor 33 includes stator structure 331 and a rotor structure 332 .
- the rotor structure 332 is pivotally disposed in the stator structure 331 . The magnetic interaction between the rotor structure 332 and the stator structure 331 drives the hub 321 to rotate the blades 322 so that air flow can be generated.
- fan size and blade shape To increase the air flux and pressure of the fan 3 , a key factor is the selection of fan size and blade shape. An appropriate choice of fan size can help achieve the goals of maximal performance, minimal energy consumption, and minimal noise.
- the sizes of the motor 33 and the frame 31 have often been decided by the developer's experience or trial and error. No experience or theoretical formula between them is available to people working in the field. This increases the time and efforts for designing and thus the production cost.
- the invention is to provide a high-performance and low-noise fan and the method for selecting the motor size thereof that reduces the development time.
- the invention discloses a fan including a frame, an impeller, and a motor.
- the impeller is accommodated in the frame.
- the motor drives the impeller and includes a rotor structure and a stator structure.
- the invention also discloses a method for selecting the motor size of a fan.
- C is a constant and n is a variable number.
- the invention can indeed find a suitable combination of the frame dimension and motor size. It achieves the goals of reducing the development time, maximizing the performance, and minimizing noise in the fans.
- FIG. 1 is a schematic view of the conventional fan
- FIG. 2 is a schematic view of the fan according to a preferred embodiment of the invention.
- FIG. 3 shows the relation between the dimension of the frame and the diameter of the stator structure in a fan according to the preferred embodiment
- FIG. 4 is a flowchart of the disclosed method for selecting the motor size of a fan according to the preferred embodiment.
- the fan 2 according to a preferred embodiment of the invention includes a frame 21 , an impeller 22 , and a motor 23 .
- the fan 2 is an axial-flow fan.
- the impeller 22 is accommodated in the frame 21 . It has a hub 221 and several blades 222 disposed around the hub 221 .
- the motor 23 connects to the hub 221 and drives the hub 221 to rotate the blades 222 .
- the motor 23 includes a rotor structure 231 and a stator structure 232 .
- the rotor structure 231 includes a magnetically conductive shell 231 a, a magnetic element 231 b, and a shaft 231 c.
- the magnetic element 231 b is disposed on an inner surface of the magnetically conductive shell 231 a corresponding to the stator structure 232 .
- the shaft 231 c is coupled to the magnetically conductive shell 231 a.
- the magnetically conductive shell 231 a connects to the hub 221 of the impeller 22 .
- the stator structure 232 has an axial hole 232 a.
- the shaft 231 c of the rotor structure 231 is inserted through the axial hole 232 a and is pivotally disposed in the stator structure 232 .
- the stator structure 232 drives the rotor structure 231 to rotate the impeller 22 so that the airflow is generated.
- the X and Y are dimensions of the stator structure 232 and the frame 21 , respectively.
- the equation is obtained through the following steps. First, the dimensions Y of several fans 21 and the diameters X of the stator structure 232 of several motors 23 are measured. The measured frame dimensions Y and stator structure diameters X are then examined using statistical analyses and recursion processes. The equation is obtained by taking the diameters X as the x-axis coordinates and the dimensions Y as the y-axis coordinates.
- the fan 2 has a thickness greater than or equal to 1.5 inch or 38 mm.
- the dimension Y of the frame 21 is greater than or equal to 0.04 m and smaller than or equal to 0.12 m.
- a ration of the diameter X of the stator structure 232 to the dimension Y of the frame 21 is greater than or equal to 25% and smaller than or equal to 50%. That is, 25% ⁇ X/Y ⁇ 50%.
- Step S 1 provides a frame 21 with a dimension Y and a stator structure 232 with a diameter X.
- the invention can indeed find a suitable combination of the frame dimension and motor size. It achieves the goals of reducing the development time, maximizing the performance, and minimizing noise in the fans.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A fan includes a frame, an impeller and a motor. The impeller is accommodated in the frame. The motor connects and drives the impeller to rotate, and includes a rotor structure and a stator structure. The dimension Y of the frame and the diameter X of the stator structure meet the equation of Y=CXn′ wherein C is a constant, and n is a variable number. A selecting method for motor size of the fan is also disclosed.
Description
- This Non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 095126094 filed in Taiwan, Republic of China on Jul. 17, 2006, the entire contents of which are hereby incorporated by reference.
- 1. Field of Invention
- The invention relates to a fan and the method for selecting the motor size thereof. In particular, the invention relates to a method for selecting matching, corresponding fan and motor sizes to achieve optimal efficiency.
- 2. Related Art
- As electronic products increase in performance, frequency, speeds, and compactness, they inevitably encounter the problem of excessive heat production. Such heat results in elevated temperature and system instability. Therefore, heat dissipation has become one of the most important issues in designing electronic products.
- Using a fan as the heat dissipating device is one common solution. As shown in
FIG. 1 , aconventional fan 3 includes aframe 31, animpeller 32, and amotor 33. Theimpeller 32 is accommodated in theframe 31, and includes ahub 321 andseveral blades 322 disposed around thehub 321. Themotor 33 connects to thehub 321 and drives theblades 32. Themotor 33 includesstator structure 331 and arotor structure 332. Therotor structure 332 is pivotally disposed in thestator structure 331. The magnetic interaction between therotor structure 332 and thestator structure 331 drives thehub 321 to rotate theblades 322 so that air flow can be generated. - To increase the air flux and pressure of the
fan 3, a key factor is the selection of fan size and blade shape. An appropriate choice of fan size can help achieve the goals of maximal performance, minimal energy consumption, and minimal noise. During the development offans 3, the sizes of themotor 33 and theframe 31 have often been decided by the developer's experience or trial and error. No experience or theoretical formula between them is available to people working in the field. This increases the time and efforts for designing and thus the production cost. - Therefore, it is highly desirable to provide a high-performance and low-noise fan and the method for selecting the motor size thereof that reduces the development time.
- In view of the foregoing, the invention is to provide a high-performance and low-noise fan and the method for selecting the motor size thereof that reduces the development time.
- To achieve the above, the invention discloses a fan including a frame, an impeller, and a motor. The impeller is accommodated in the frame. The motor drives the impeller and includes a rotor structure and a stator structure. The dimension Y of the frame and the diameter X of the stator structure meet an equation of Y=CXn, where C is a constant and n is a variable number.
- To achieve the above, the invention also discloses a method for selecting the motor size of a fan. The method includes the steps of: providing a frame with a dimension Y of a frame and a stator structure with a diameter X; and obtaining the diameter X of the stator structure or the dimension Y of the frame according to an equation of Y=CXn. Wherein, C is a constant and n is a variable number.
- As mentioned above, the invention requires that the frame dimension and the motor size meet the equation of Y=CXn. In comparison with the prior art, the invention can indeed find a suitable combination of the frame dimension and motor size. It achieves the goals of reducing the development time, maximizing the performance, and minimizing noise in the fans.
- The invention will become more fully understood from the detailed description given herein below illustration only, and thus is not limitative of the present invention, and wherein:
-
FIG. 1 is a schematic view of the conventional fan; -
FIG. 2 is a schematic view of the fan according to a preferred embodiment of the invention; -
FIG. 3 shows the relation between the dimension of the frame and the diameter of the stator structure in a fan according to the preferred embodiment; and -
FIG. 4 is a flowchart of the disclosed method for selecting the motor size of a fan according to the preferred embodiment. - The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.
- Please refer to
FIG. 2 . Thefan 2 according to a preferred embodiment of the invention includes aframe 21, animpeller 22, and amotor 23. In the preferred embodiment, thefan 2 is an axial-flow fan. - The
impeller 22 is accommodated in theframe 21. It has ahub 221 andseveral blades 222 disposed around thehub 221. - The
motor 23 connects to thehub 221 and drives thehub 221 to rotate theblades 222. Themotor 23 includes arotor structure 231 and astator structure 232. Therotor structure 231 includes a magneticallyconductive shell 231 a, amagnetic element 231 b, and ashaft 231 c. Themagnetic element 231 b is disposed on an inner surface of the magneticallyconductive shell 231 a corresponding to thestator structure 232. Theshaft 231 c is coupled to the magneticallyconductive shell 231 a. The magneticallyconductive shell 231 a connects to thehub 221 of theimpeller 22. Thestator structure 232 has anaxial hole 232 a. Theshaft 231 c of therotor structure 231 is inserted through theaxial hole 232 a and is pivotally disposed in thestator structure 232. Thestator structure 232 drives therotor structure 231 to rotate theimpeller 22 so that the airflow is generated. As shown inFIG. 2 , the X and Y are dimensions of thestator structure 232 and theframe 21, respectively. - As shown in
FIG. 3 , to increase the performance of thefan 2, i.e. the air pressure and flux, the dimension Y of theframe 21 and the diameter X of thestator structure 232 meet the equation of Y=CXn, where C is a constant and n is a variable number between 1 and 2. - In this embodiment, the equation is obtained through the following steps. First, the dimensions Y of
several fans 21 and the diameters X of thestator structure 232 ofseveral motors 23 are measured. The measured frame dimensions Y and stator structure diameters X are then examined using statistical analyses and recursion processes. The equation is obtained by taking the diameters X as the x-axis coordinates and the dimensions Y as the y-axis coordinates. - In particular, the
fan 2 has a thickness greater than or equal to 1.5 inch or 38 mm. The dimension Y of theframe 21 is greater than or equal to 0.04 m and smaller than or equal to 0.12 m. A ration of the diameter X of thestator structure 232 to the dimension Y of theframe 21 is greater than or equal to 25% and smaller than or equal to 50%. That is, 25%≦X/Y≦50%. The variable number n is greater than 1 and smaller than 2. In this embodiment, the equation is Y=13.25X1.4±5%. - A method for selecting the motor size of the
fan 2 according to a preferred embodiment of the invention is illustrated inFIG. 4 . The method includes steps S1 and S2. Step S1 provides aframe 21 with a dimension Y and astator structure 232 with a diameter X. Step S2 obtains the diameter X of thestator structure 232 or the dimension Y of theframe 21 according to an equation of Y=CXn, where C is a constant and n is a variable number. - When applying the equation to the assembly of a
fan 2, one first measures the dimension Y of theframe 21 or the diameter X of thestator structure 232. Using the equation, one obtains the diameter X of thestator structure 232 or the dimension Y of theframe 21 that satisfies the equation. This determines the dimension of theframe 21 and the size of themotor 23. Finally, theframe 21 with the dimension Y and thestator structure 232 with the diameter X are assembled to form themotor 23. - In summary, the invention requires that the frame dimension and the motor size meet the equation of Y=CXn. In comparison with the prior art, the invention can indeed find a suitable combination of the frame dimension and motor size. It achieves the goals of reducing the development time, maximizing the performance, and minimizing noise in the fans.
- Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the invention.
Claims (19)
1. A fan comprising:
a frame;
an impeller accommodated in the frame; and
a motor driving the impeller and comprising a rotor structure and a stator structure;
wherein a dimension Y of the frame and a diameter X of the stator structure meet an equation of Y=CXn, where C is a constant and n is a variable number.
2. The fan of claim 1 , wherein Y is greater than or equal to 0.04 m and smaller than or equal to 0.12 m.
3. The fan of claim 1 , wherein the equation is Y=13.25X1.4±5%.
4. The fan of claim 1 , wherein n is greater than 1 and smaller than 2.
5. The fan of claim 1 , wherein the fan has a thickness greater than or equal to 1.5 inches.
6. The fan of claim 1 , wherein the impeller includes a hub and a plurality of blades disposed around the hub.
7. The fan of claim 1 , wherein the fan is an axial-flow fan.
8. The fan of claim 1 , wherein a ratio of the diameter X of the stator structure to the dimension Y of the frame ranges between 25% and 50%.
9. The fan of claim 1 , wherein the rotor structure includes a magnetically conductive shell, a magnetic element, and a shaft, the magnetic element is disposed on an inner surface of the magnetically conductive shell corresponding to the stator structure, the shaft is coupled to the magnetically conductive shell, and the magnetically conductive shell connects to a hub of the impeller.
10. The fan of claim 9 , wherein the stator structure has an axial hole and the shaft of the rotor structure is inserted through the axial hole.
11. A method for selecting the motor size of a fan, comprising the steps of: a
providing a frame with a dimension Y and a stator structure with a diameter X; and
obtaining the diameter X of the stator structure or the dimension Y of the frame according to an equation of Y=CXn;
wherein C is a constant and n is a variable number.
12. The method of claim 11 , wherein Y is greater than or equal to 0.04 m and smaller than or equal to 0.12 m.
13. The method of claim 11 , wherein the equation is Y=13.25X1.4±5%.
14. The method of claim 11 , wherein n is greater than 1 and smaller than 2.
15. The method of claim 11 , wherein the fan has a thickness greater than or equal to 1.5 inches.
16. The method of claim 11 , wherein a ratio of the diameter X of the stator structure to the dimension Y of the frame ranges between 25% and 50%.
17. The method of claim 11 , wherein the rotor structure includes a magnetically conductive shell, a magnetic element, and a shaft, the magnetic element is disposed on an inner surface of the magnetically conductive shell corresponding to the stator structure, the shaft is coupled to the magnetically conductive shell, and the magnetically conductive shell connects to a hub of the impeller.
18. The method of claim 17 , wherein the stator structure has an axial hole and the shaft of the rotor structure is inserted through the axial hole.
19. The method of claim 11 , wherein the fan is an axial-flow fan.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW095126094A TWI307741B (en) | 2006-07-17 | 2006-07-17 | Fan and selecting method for motor size thereof |
TW095126094 | 2006-07-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080014102A1 true US20080014102A1 (en) | 2008-01-17 |
Family
ID=38949446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/822,246 Abandoned US20080014102A1 (en) | 2006-07-17 | 2007-07-03 | Fan and selecting method for motor size thereof |
Country Status (2)
Country | Link |
---|---|
US (1) | US20080014102A1 (en) |
TW (1) | TWI307741B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10965459B2 (en) | 2015-03-13 | 2021-03-30 | Fornetix Llc | Server-client key escrow for applied key management system and process |
US11470086B2 (en) | 2015-03-12 | 2022-10-11 | Fornetix Llc | Systems and methods for organizing devices in a policy hierarchy |
US11537195B2 (en) | 2016-02-26 | 2022-12-27 | Fornetix Llc | Policy-enabled encryption keys having complex logical operations |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2812459A (en) * | 1956-07-30 | 1957-11-05 | Gen Electric | Electric motor winding arrangement |
US2928632A (en) * | 1954-08-09 | 1960-03-15 | Wayne J Morrill | Resilient motor mounting |
US6133666A (en) * | 1999-03-25 | 2000-10-17 | General Electric Company | Electric motor with a stator including a central locator |
US6346755B1 (en) * | 2000-06-30 | 2002-02-12 | General Electric Company | Optimization of ventilating flow path at air gap exit in reverse flow generators |
US20040189135A1 (en) * | 2003-03-27 | 2004-09-30 | Kuen Yang Industrial Co., Ltd. | Motor stator for a home electric fan |
-
2006
- 2006-07-17 TW TW095126094A patent/TWI307741B/en not_active IP Right Cessation
-
2007
- 2007-07-03 US US11/822,246 patent/US20080014102A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2928632A (en) * | 1954-08-09 | 1960-03-15 | Wayne J Morrill | Resilient motor mounting |
US2812459A (en) * | 1956-07-30 | 1957-11-05 | Gen Electric | Electric motor winding arrangement |
US6133666A (en) * | 1999-03-25 | 2000-10-17 | General Electric Company | Electric motor with a stator including a central locator |
US6346755B1 (en) * | 2000-06-30 | 2002-02-12 | General Electric Company | Optimization of ventilating flow path at air gap exit in reverse flow generators |
US20040189135A1 (en) * | 2003-03-27 | 2004-09-30 | Kuen Yang Industrial Co., Ltd. | Motor stator for a home electric fan |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11470086B2 (en) | 2015-03-12 | 2022-10-11 | Fornetix Llc | Systems and methods for organizing devices in a policy hierarchy |
US10965459B2 (en) | 2015-03-13 | 2021-03-30 | Fornetix Llc | Server-client key escrow for applied key management system and process |
US11924345B2 (en) | 2015-03-13 | 2024-03-05 | Fornetix Llc | Server-client key escrow for applied key management system and process |
US11537195B2 (en) | 2016-02-26 | 2022-12-27 | Fornetix Llc | Policy-enabled encryption keys having complex logical operations |
Also Published As
Publication number | Publication date |
---|---|
TWI307741B (en) | 2009-03-21 |
TW200806889A (en) | 2008-02-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DELTA ELECTRONICS, INC., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LEE, SUNG-WEI;LEE, CHIN-HONG;REEL/FRAME:019554/0952 Effective date: 20070320 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |