TWI408286B - Fan speed control method - Google Patents
Fan speed control method Download PDFInfo
- Publication number
- TWI408286B TWI408286B TW99104143A TW99104143A TWI408286B TW I408286 B TWI408286 B TW I408286B TW 99104143 A TW99104143 A TW 99104143A TW 99104143 A TW99104143 A TW 99104143A TW I408286 B TWI408286 B TW I408286B
- Authority
- TW
- Taiwan
- Prior art keywords
- fan
- resistance value
- flow resistance
- value
- rotation speed
- Prior art date
Links
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
本發明是有關於一種控制方法，特別是指一種風扇轉速控制方法。The invention relates to a control method, in particular to a fan speed control method.
現有散熱風扇的散熱效果多取決風扇的轉速，風扇的轉速愈高散熱效果愈好，但是，相對的風扇的轉速愈高，所產生的噪音也愈大而且也較為耗電，因此，現有風扇多會在如圖1所示之風扇性能曲線(靜壓-風量曲線，P-Q曲線)上決定風扇的最佳出風量與靜壓值，以在散熱效果、噪音值與耗電量間取得平衡。The heat dissipation effect of the existing cooling fan depends on the rotation speed of the fan. The higher the rotation speed of the fan, the better the heat dissipation effect. However, the higher the rotational speed of the opposite fan, the greater the noise generated and the more power consumption. Therefore, the existing fan has more The optimal fan volume and static pressure value of the fan will be determined on the fan performance curve (static pressure-wind volume curve, PQ curve) as shown in Fig. 1 to balance the heat dissipation effect, noise value and power consumption.
隨著科技的進步，各式各樣電子產品的體積也愈來愈小，但是元件發熱量卻愈來愈高，因此，散熱風扇除了降低元件運作時所產生的熱量外，還需因應空間狹小，以及運作時間之長短所造成之積熱現象進行轉速的調整。With the advancement of technology, the volume of various electronic products is getting smaller and smaller, but the heat generation of components is getting higher and higher. Therefore, in addition to reducing the heat generated by the operation of the components, the cooling fan needs to have a small space. And the accumulated heat caused by the length of operation to adjust the speed.
現有常見的散熱風扇轉速控制方法，如中華民國公告第I295421號「風扇轉速自動控制方法」發明專利，利用感測溫度以調整風扇的轉速，以達成依據溫度調整風扇轉速穩定散熱效果的目的，雖然利用周遭溫度的變化以改變風扇轉速能適用於大多數的散熱需求。The existing common cooling fan speed control method, such as the Republic of China Announcement No. I295421 "fan speed automatic control method" invention patent, the use of sensing temperature to adjust the fan speed, in order to achieve the purpose of temperature adjustment fan speed stability cooling effect, although Utilizing changes in ambient temperature to change fan speed can be applied to most cooling needs.
但是，周遭溫度的變化有可能是因為散熱風扇的入風口或是出風口遭受遮蔽，或是流體阻力的改變，造成出風量降低、靜壓值升高，使得散熱風扇的散熱效果降低而產生積熱所引起，因此，利用周遭溫度的變化以改變風扇轉速的風扇轉速控制方法，並不適用於入風口或是出風口會不定時受到遮蔽，或流體阻力可能發生改變處之風扇。However, the change in ambient temperature may be due to the shielding of the air inlet or the air outlet of the cooling fan, or the change of the fluid resistance, resulting in a decrease in the air volume and an increase in the static pressure value, so that the heat dissipation effect of the heat dissipation fan is reduced and the product is accumulated. Because of the heat, the fan speed control method that uses the change of ambient temperature to change the fan speed is not suitable for the fan where the air inlet or the air outlet is blocked from time to time or where the fluid resistance may change.
因此，本發明之目的，即在提供一種能維持在最佳出風量與靜壓值的風扇轉速控制方法。Accordingly, it is an object of the present invention to provide a fan speed control method capable of maintaining an optimum air volume and static pressure value.
於是，本發明風扇轉速控制方法，依序包含一偵測步驟、一判斷步驟、一調整步驟，及一確認步驟。Therefore, the fan speed control method of the present invention sequentially includes a detecting step, a determining step, an adjusting step, and a confirming step.
該偵測步驟是利用一控制器偵測風扇運轉時所產生的一運轉流阻值；該判斷步驟是利用該控制器判斷該運轉流阻值是否小於一設定流阻值，若是該運轉流阻值小於該設定流阻值則進入下一步驟，若是該運轉流阻值不小於該設定流阻值則回復至該偵測步驟。The detecting step is to use a controller to detect an operating flow resistance value generated when the fan is running; the determining step is to use the controller to determine whether the operating flow resistance value is less than a set flow resistance value, and if the operating flow resistance is If the value is less than the set flow resistance value, the process proceeds to the next step, and if the operation flow resistance value is not less than the set flow resistance value, the detection step is returned.
該調整步驟是由該控制器輸出一脈衝寬度調變信號增加風扇的轉速，並偵測對應該轉速所產生的一調整流阻值；該確認步驟是利用該控制器判斷該調整流阻值是否小於該設定流阻值，若該調整流阻值不小於該設定流阻值，則固定該風扇的轉速，若該調整流阻值小於該設定流阻值，則回復至該調整步驟直到風扇的轉速達最高值。The adjusting step is that the controller outputs a pulse width modulation signal to increase the rotation speed of the fan, and detects an adjusted flow resistance value corresponding to the rotation speed; the confirming step is to use the controller to determine whether the adjusted flow resistance value is If the adjusted flow resistance value is not less than the set flow resistance value, the rotation speed of the fan is fixed, and if the adjustment flow resistance value is less than the set flow resistance value, returning to the adjustment step until the fan is The maximum speed is reached.
本發明之功效在於：利用偵測風扇運轉時所產生的該運轉流阻值與該設定流阻值做比較，以調整風扇的轉速，不但無須增加額外構件，而且由於風扇的出風量與風扇的被遮蔽率呈反比，而出風量又受該調整流阻值控制，使風扇在一定的遮蔽率下仍能維持在最佳出風量與靜壓值。The effect of the invention is that the running flow resistance value generated when the detecting fan is operated is compared with the set flow resistance value to adjust the rotating speed of the fan, not only without adding additional components, but also because of the fan outlet amount and the fan The shielding rate is inversely proportional, and the air volume is controlled by the adjusted flow resistance value, so that the fan can maintain the optimal air volume and static pressure value under a certain shielding rate.
有關本發明之前述及其他技術內容、特點與功效，在以下配合參考圖式之一個較佳實施例的詳細說明中，將可清楚的呈現。The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.
參閱圖2，本發明風扇轉速控制方法之較佳實施例，依序包含一偵測步驟11、一判斷步驟12、一調整步驟13，及一確認步驟14。Referring to FIG. 2, a preferred embodiment of the fan speed control method of the present invention includes a detecting step 11, a determining step 12, an adjusting step 13, and a confirming step 14.
參閱圖2、3，該偵測步驟11是利用一控制器偵測風扇運轉時所產生的一運轉流阻值。於本較佳實施例中，該控制器是一可程式控制的微控制單元(Micro Controller Unit,MCU)，而該運轉流阻值是驅動風扇所需的電流值，並與該風扇運轉時的遮蔽率呈反比。當然在實際應用上，該控制器也可以是積體電路，而該運轉流阻值則也可以是驅動該風扇所需的電壓值，或是風扇運轉時流經線圈之電流所產生的磁通量。Referring to Figures 2 and 3, the detecting step 11 is to use a controller to detect an operating flow resistance value generated when the fan is running. In the preferred embodiment, the controller is a programmable Micro Controller Unit (MCU), and the operating flow resistance value is a current value required to drive the fan, and is in operation with the fan. The shielding rate is inversely proportional. Of course, in practical applications, the controller may also be an integrated circuit, and the operational flow resistance value may also be a voltage value required to drive the fan, or a magnetic flux generated by a current flowing through the coil when the fan is running.
該判斷步驟12是利用該控制器判斷該運轉流阻值是否小於一設定流阻值，若是該運轉流阻值小於該設定流阻值則進入下一步驟，若是該運轉流阻值不小於該設定流阻值則回復至該偵測步驟11。於本較佳實施例中，該設定流阻值是風扇性能曲線上最佳出風量與靜壓值所對應的電流值。The determining step 12 is to determine whether the operating flow resistance value is less than a set flow resistance value by using the controller, and if the operating flow resistance value is less than the set flow resistance value, proceeding to the next step, if the operating flow resistance value is not less than the Setting the flow resistance value returns to the detecting step 11. In the preferred embodiment, the set flow resistance value is a current value corresponding to the optimal air flow rate and the static pressure value on the fan performance curve.
該調整步驟13是由該控制器輸出一脈衝寬度調變信號(Pulse Width Modulation,PWM)增加風扇的轉速，並偵測對應該轉速所產生的一調整流阻值。於本較佳實施中，該調整流阻值是對應風扇經脈衝寬度調變信號增加轉速後的電流值。In the adjusting step 13, the controller outputs a Pulse Width Modulation (PWM) to increase the rotation speed of the fan, and detects an adjusted flow resistance value corresponding to the rotation speed. In the preferred embodiment, the adjusted flow resistance value is a current value corresponding to a fan that increases the rotational speed after the pulse width modulation signal.
該確認步驟14是利用該控制器判斷該調整流阻值是否小於該設定流阻值，若該調整流阻值不小於該設定流阻值，則固定該風扇的轉速，若該調整流阻值小於該設定流阻值，則回復至該調整步驟13直到風扇的轉速達最高值。The confirming step 14 is to determine whether the adjusted flow resistance value is less than the set flow resistance value by using the controller, and if the adjusted flow resistance value is not less than the set flow resistance value, fixing the rotational speed of the fan, if the adjusted flow resistance value If it is less than the set flow resistance value, it returns to the adjustment step 13 until the fan speed reaches the highest value.
參閱圖4，發明人以出風口的不同遮蔽率進行實驗，以驗證本發明風扇轉速控制方法的功效，當然可以是以入風口的不同遮蔽率進行實驗，依然可以達成相同的結果。Referring to FIG. 4, the inventors conducted experiments with different shielding rates of the air outlet to verify the effectiveness of the fan speed control method of the present invention. Of course, the experiment can be performed with different shielding rates of the air inlet, and the same result can still be achieved.
在此要先說明的是，風扇的出風量與出(入)風口的遮蔽率呈反比，而且出風量又取決於風扇的轉速，而風扇的轉速改變又是與調整流阻值成正比，因此，本實驗例是以風扇的轉速代表不同的調整流阻值進行說明。It should be noted here that the air output of the fan is inversely proportional to the shielding rate of the air inlet (inlet), and the air volume depends on the speed of the fan, and the speed change of the fan is proportional to the value of the adjusted flow resistance. This experimental example is based on the fact that the fan speed represents different adjusted flow resistance values.
其中，圖4右側的縱軸是出風量的比率、左側的縱軸是風扇的轉速，而橫軸則是代表出風口的不同遮蔽率。由圖3中所示可知，當出風口的遮蔽率為0~5%且風扇的轉速是4000rpm時，是100%的出風量，也就是代表在出風口的遮蔽率為0~5%時，4000rpm轉速即可維持該風扇於最佳的出風量與靜壓值。The vertical axis on the right side of FIG. 4 is the ratio of the air volume, the vertical axis on the left side is the rotation speed of the fan, and the horizontal axis represents the different shielding rate of the air outlet. As can be seen from FIG. 3, when the shielding rate of the air outlet is 0 to 5% and the rotation speed of the fan is 4000 rpm, it is 100% of the air volume, that is, when the shielding rate of the air outlet is 0 to 5%. The optimum airflow and static pressure of the fan can be maintained at 4000 rpm.
而當出風口的遮蔽率為10%~65%時，利用將風扇的轉速由4100rpm逐漸提高至5500rpm，仍可使出風量維持在100%，也就是說，在出風口的遮蔽率為10%~65%時，利用脈衝寬度調變信號提高風扇的轉速，仍然能維持該風扇於最佳的出風量與靜壓值。When the shielding rate of the air outlet is 10%~65%, the fan speed can be maintained at 100% by gradually increasing the rotational speed of the fan from 4100 rpm to 5500 rpm, that is, the shielding rate at the air outlet is 10%. When ~65%, the pulse width modulation signal is used to increase the fan speed, and the fan can maintain the optimal air volume and static pressure value.
當出風口的遮蔽率增加至70%~100%時，風扇的轉速雖提升至5600rpm，而出風量卻逐漸遞減至80%，這代表此風扇的轉速最高為5600rpm，而且當出風口的遮蔽率增加至70%~100%，即會造成該風扇的出風量降低、靜壓值升高。When the shielding rate of the air outlet increases to 70%~100%, the fan speed is increased to 5600 rpm, and the air volume is gradually reduced to 80%, which means that the fan speed is up to 5600 rpm, and the shielding rate of the air outlet is Increasing to 70%~100% will cause the fan's airflow to decrease and the static pressure to rise.
由上述說明可知，利用偵測風扇運轉時所產生的該運轉流阻值與該設定流阻值做比較，只要出(入)風口受到遮蔽或是流體阻力發生變化，就可以立刻藉由增加風扇的轉速提高出風量，使風扇於一定的遮蔽率下仍維持在最佳出風量與靜壓值，而且無須增加額外的設備，對於風扇轉速的控制不但更為即時，也能應用出(入)風口不定時受到遮蔽，或流體阻力可能發生改變之風扇的轉速控制上。It can be seen from the above description that the running flow resistance value generated by detecting the fan operation is compared with the set flow resistance value, and as long as the air inlet is blocked or the fluid resistance changes, the fan can be immediately increased. The speed of the fan increases the air volume, so that the fan maintains the optimal air volume and static pressure value under a certain shielding rate, and does not need to add additional equipment. The control of the fan speed is not only more immediate, but also can be applied (in). The tuyere is shielded from time to time, or the speed of the fan whose fluid resistance may change is controlled.
綜上所述，本發明風扇轉速控制方法，利用偵測風扇運轉時所產生的該運轉流阻值與該設定流阻值做比較，以調整風扇的轉速，不但無須增加額外構件，而且只要出(入)風口受到遮蔽，或是流體阻力發生變化，就可以立刻藉由增加風扇的轉速提高出風量，使風扇於一定的遮蔽率下仍維持在最佳出風量與靜壓值，而且無須增加額外的設備，對於風扇轉速的控制不但更為即時，也能應用出(入)風口不定時受到遮蔽，或流體阻力可能發生改變之風扇的轉速控制上，故確實能達成本發明之目的。In summary, the fan speed control method of the present invention compares the running flow resistance value generated when the detecting fan is operated with the set flow resistance value to adjust the rotation speed of the fan, not only without adding additional components, but also as long as If the air inlet is shielded or the fluid resistance changes, the fan output can be increased immediately by increasing the fan speed, so that the fan maintains the optimal air volume and static pressure value at a certain shielding rate, and does not need to increase. The additional equipment, the control of the fan speed is not only more immediate, but also can be applied to the speed control of the fan whose air inlet is blocked from time to time or the fluid resistance may change, so the object of the present invention can be achieved.
惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及發明說明內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.
11．．．偵測步驟11. . . Detection step
12．．．判斷步驟12. . . Judgment step
13．．．調整步驟13. . . Adjustment steps
14．．．確認步驟14. . . Confirmation step
圖1是一特性曲線圖，說明現有散熱風扇的靜壓-風量特性曲線；1 is a characteristic diagram illustrating a static pressure-air volume characteristic curve of a conventional cooling fan;
圖2是一流程圖，說明本發明風扇轉速控制方法之較佳實施例；2 is a flow chart showing a preferred embodiment of the method for controlling the rotational speed of the fan of the present invention;
圖3是一流程圖，輔助說明圖2中每一步驟的過程；及Figure 3 is a flow chart for explaining the process of each step in Figure 2;
圖4是一比較圖，說明該較佳實施例的實驗結果。Figure 4 is a comparative diagram illustrating the experimental results of the preferred embodiment.
11．．．偵測步驟11. . . Detection step
12．．．判斷步驟12. . . Judgment step
13．．．調整步驟13. . . Adjustment steps
14．．．確認步驟14. . . Confirmation step
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW99104143A TWI408286B (en) | 2010-02-10 | 2010-02-10 | Fan speed control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW99104143A TWI408286B (en) | 2010-02-10 | 2010-02-10 | Fan speed control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201128075A TW201128075A (en) | 2011-08-16 |
| TWI408286B true TWI408286B (en) | 2013-09-11 |
Family
ID=45025030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW99104143A TWI408286B (en) | 2010-02-10 | 2010-02-10 | Fan speed control method |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TWI408286B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI495990B (en) * | 2012-12-14 | 2015-08-11 | Wistron Corp | Method for detecting heat dissipating air flow and electronic device using the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005076525A (en) * | 2003-08-29 | 2005-03-24 | Shin Caterpillar Mitsubishi Ltd | Fan rotation speed control method |
| TW200644401A (en) * | 2006-03-10 | 2006-12-16 | Shou-De You | Driving circuit structure for electric fan |
| TW200719128A (en) * | 2005-11-15 | 2007-05-16 | Zippy Tech Corp | Fan rotation speed control method and the architecture thereof |
| US7291995B2 (en) * | 2005-12-01 | 2007-11-06 | Zippy Technology Corp. | Air fan rotation speed control method and structure thereof |
-
2010
- 2010-02-10 TW TW99104143A patent/TWI408286B/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005076525A (en) * | 2003-08-29 | 2005-03-24 | Shin Caterpillar Mitsubishi Ltd | Fan rotation speed control method |
| TW200719128A (en) * | 2005-11-15 | 2007-05-16 | Zippy Tech Corp | Fan rotation speed control method and the architecture thereof |
| US7291995B2 (en) * | 2005-12-01 | 2007-11-06 | Zippy Technology Corp. | Air fan rotation speed control method and structure thereof |
| TW200644401A (en) * | 2006-03-10 | 2006-12-16 | Shou-De You | Driving circuit structure for electric fan |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201128075A (en) | 2011-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103312245B (en) | Motor controller and motor control method | |
| KR102009450B1 (en) | Method for constant air volume control by direct power control of pm motor and hvac system applying same | |
| US8251671B2 (en) | Apparatus for controlling an air distribution system | |
| US10003287B2 (en) | Magnet degradation and damage controls and diagnostics for permanent magnet motors | |
| US9374931B2 (en) | Graphic card with multiple fans and controlling method thereof | |
| EP3139717B1 (en) | Heat dissipation device, heat dissipation control method and controller | |
| CN103790846B (en) | Fan rotational frequency control method and device | |
| CN103062086A (en) | Cooling system and control method thereof | |
| JP2017500470A5 (en) | ||
| JP2010249751A (en) | Current-sensing circuit and air-conditioning device provided therewith | |
| US8415907B2 (en) | Motor control method | |
| CN110196608A (en) | A kind of heat dissipation of terminal device and the cooling control method based on heat dissipation of terminal device | |
| CN105570175A (en) | Constant-air-volume motor drive control method for fan | |
| CN102192174A (en) | Method for controlling the rotation speed of fan | |
| JPWO2014041720A1 (en) | Motor control device and motor control method | |
| CN105276651A (en) | Low-static-pressure resisting constant-air-volume control method and device and constant-air-volume kitchen ventilator | |
| TWI408286B (en) | Fan speed control method | |
| FI125258B (en) | Method of controlling a vacuum centrifugal fan with adjustable rotational speed | |
| TWI660263B (en) | Temperature control device and method thereof | |
| TWI494052B (en) | Method for controlling fan speed and electronic device | |
| TW201918824A (en) | Temperature control device and control method thereof | |
| CN105762986A (en) | Automatic speed-regulating ECM motor and freezer using same | |
| US8179071B2 (en) | System and method for cooling using counter-rotating fans | |
| JP6040066B2 (en) | Fan motor drive control device | |
| JP2010022102A (en) | Brushless dc motor and ventilation blower mounting it |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Annulment or lapse of patent due to non-payment of fees |