JP5721306B2 - Fan speed linear compensation method - Google Patents
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本発明は一種のファン回転速度直線補償方法に関する。特にＩＣにより補償後のＰＷＭ信号を提供し、ファン回転速度を制御し、ファンの回転速度は曲線補償を経た後、直線かつ線性を呈するファン回転速度直線補償方法に係る。 The present invention relates to a kind of fan rotational speed linear compensation method. In particular, the present invention relates to a fan rotational speed linear compensation method in which a compensated PWM signal is provided by an IC, the fan rotational speed is controlled, and the rotational speed of the fan is linear and linear after undergoing curve compensation.
電子パーツの高速化と複雑化は、電子パーツ作動時に発生する熱エネルギーを増大させている。よって多くの電子パーツ上或いはその作動環境中には散熱ファンを設置し、電子パーツを冷却し正常に作動させるよう確保しなければならない。
現在コンピュータ、グラフィクスカード或いはノート型コンピュータ(パソコン)においてファンが使用される時、一般的に重視される点は散熱ファンの回転速度制御等の問題である。散熱ファンの運転方式制御においては、オン/オフ(ON/OFF)以外に、主なものはＰＷＭ(Pulse Width Modulation)を用いたファン運転を制御することで、各単位時間内において作動周期(duty cycle)の差異を調整し、これによりファン回転速度を制御する。
Increasing the speed and complexity of electronic parts increases the thermal energy generated when electronic parts are operating. Therefore, a heat-dissipating fan must be installed on many electronic parts or in the operating environment to ensure that the electronic parts are cooled and operate normally.
When a fan is currently used in a computer, a graphics card, or a notebook computer (personal computer), the point that is generally emphasized is a problem such as the rotational speed control of the heat dissipation fan. In heat dissipation fan operation system control, in addition to on / off (ON / OFF), the main thing is to control the fan operation using PWM (Pulse Width Modulation), so that the operation cycle (duty) Cycle) is adjusted to control the fan speed.
図１、２に示すように、公知のファン速度制御が、オープンループ(Open Loop)測定回転速度制御を行う時は、ＩＣ(Integrated Circut)により受信した入力ＰＷＭ(Pulse width modulation)信号を出力ＰＷＭ信号に転換する。
図１中ＰＷＭ信号の作動周期は0％〜100％で、しかも前記ＰＷＭ信号の入力信号は出力信号に対応し、前記作動周期範囲内の曲線は直線A1を呈する。しかも１:１の比率で、前記ＩＣは出力ＰＷＭ信号に基づきファン運転を制御し、ファンの回転速度曲線は図２に示すように上放物線F1を呈する。前記図２では、ファン回転速度がＰＷＭ作動周期に対応する曲線は上放物線F1を呈する。上記公知のファン回転速度制御には以下の三つの欠点が存在する。
１．ファン回転速度のＰＷＭ作動周期に対応する曲線は上放物線であるため、ファン回転速度の不安定を招き易い。
２．もし、オープンループの制御曲線(すなわち、ファン回転速度とＰＷＭ作動周期の曲線図)を直線性に設計するなら、回路を別に増設しなければならず、パーツコストの増加を招いてしまう。
３．各ファンモーターの特性は異なるため、ファン回転速度の規格も制定しにくい。
In FIG. 1, the operation period of the PWM signal is 0% to 100%, and the input signal of the PWM signal corresponds to the output signal, and the curve within the operation period range exhibits a straight line A1. In addition, at a ratio of 1: 1, the IC controls the fan operation based on the output PWM signal, and the rotational speed curve of the fan exhibits an upper parabola F1 as shown in FIG. In FIG. 2, the curve in which the fan rotation speed corresponds to the PWM operation cycle exhibits the upper parabola F1. The known fan rotation speed control has the following three drawbacks.
1. Since the curve corresponding to the PWM operation period of the fan rotation speed is an upper parabola, the fan rotation speed is likely to be unstable.
2. If the open loop control curve (that is, the curve diagram of the fan rotation speed and the PWM operation cycle) is designed to be linear, an additional circuit must be added, resulting in increased part costs.
3. Because the characteristics of each fan motor are different, it is difficult to establish a standard for fan rotation speed.
本発明が解決しようとする課題は、上記公知技術の欠点を解決し、ＩＣを通して補償後のＰＷＭ信号を提供し、ファン回転速度を制御し、ファンの回転速度曲線は補償を経た後、直線かつ帯ではなく線性を呈する効果を達成するファン回転速度直線補償方法を提供するものである。 The problem to be solved by the present invention is to solve the above-mentioned disadvantages of the known technique, provide a compensated PWM signal through the IC, control the fan rotation speed, and the fan rotation speed curve is linear and The present invention provides a fan rotational speed linear compensation method that achieves the effect of exhibiting linearity instead of a belt.
上記課題を解決するため、本発明は下記のファン回転速度直線補償方法を提供する。
ファン回転速度直線補償方法は以下を含み、
ＩＣ(Integrated Circut)によりＰＷＭ(Pulse width modulation)信号を読取り、補償演算を行い、補償値を求め、
前記ＰＷＭ信号から補償値をマイナス或いはプラスし、得られた補償後のＰＷＭ信号は上放物線を呈し、
前記ＩＣは前記補償後のＰＷＭ信号に基づき、ファンの回転速度を制御し、ファンの回転速度は曲線補償を経た後、直線かつ線性を呈する。
In order to solve the above problems, the present invention provides the following fan rotational speed linear compensation method.
Fan speed linear compensation method includes:
Read PWM (Pulse width modulation) signal by IC (Integrated Circut), perform compensation calculation, find compensation value ,
The minus or plus a compensation value from the PWM signal, the PWM signal after compensation obtained exhibits on the parabola,
The IC controls the rotational speed of the fan based on the compensated PWM signal, and the rotational speed of the fan is linear and linear after undergoing curve compensation.
上記のように、本発明はＩＣにより補償後のＰＷＭ信号を提供し、ファン回転速度を制御し、ファンの回転速度は曲線補償を経た後、直線かつ帯ではなく線性を呈するのでファン回転速度を安定させ、オープンループの制御曲線(すなわち、ファン回転速度とＰＷＭ作動周期の曲線図)を直線性に設計するので回路を別に増設しなくてもよくパーツコストも増加せず、各ファンモーターの特性は異なるがファン回転速度の規格に対して設計しやすい。 As described above, the present invention provides a PWM signal compensated by the IC, controls the fan rotation speed, and after the fan rotation speed undergoes curve compensation, the fan rotation speed exhibits a linearity instead of a belt. Stabilize and design the open loop control curve (i.e., curve diagram of fan rotation speed and PWM operation cycle) to be linear, so there is no need to add a separate circuit and the parts cost does not increase, and the characteristics of each fan motor Although it is different, it is easy to design to the standard of fan rotation speed.
本発明の上記目的及びその構造と機能上の特性について、図を参照して本発明の最適実施例に対して説明を行う。
図３、４、５に示すように、本発明ファン回転速度直線補償方法の最適実施例は以下のステップを含む。
(300)スタート。
(301)ＩＣ(Integrated Circuit)によりＰＷＭ(Pulse Width Modulation)信号を読取り、補償演算を行い、補償値を求める。
(302)前記ＰＷＭ信号から補償値をマイナス或いはプラスし、得られた補償後のＰＷＭ信号は下放物線A2を呈する。
(303)前記ＩＣは前記補償後のＰＷＭ信号に基づき、ファンの回転速度を制御し、ファンの回転速度は曲線補償を経た後は直線かつ線性を呈する。
(304)終了。
上記のように、本発明の実施例のファン回転速度はＰＷＭ作動周期の線性に対応し(すなわち直線)曲線F2は明確に公知ファンの上放物線F1に比べスムーズで、しかも線性である。
The above objects and the characteristics of the structure and function of the present invention will be described with reference to the drawings with respect to the optimum embodiment of the present invention.
As shown in FIGS. 3, 4 and 5, the optimum embodiment of the fan rotational speed linear compensation method of the present invention includes the following steps.
(300) Start.
(301) A PWM (Pulse Width Modulation) signal is read by an IC (Integrated Circuit), a compensation operation is performed, and a compensation value is obtained.
(302) the minus or plus a compensation value from the PWM signal, the PWM signal after compensation obtained exhibits a lower parabolic A2.
(303) The IC controls the rotational speed of the fan based on the compensated PWM signal, and the rotational speed of the fan is linear and linear after the curve compensation.
(304) End.
As described above, the fan rotation speed in the embodiment of the present invention corresponds to the linearity of the PWM operation cycle (ie, a straight line), and the curve F2 is clearly smoother and more linear than the known parabola F1.
さらに、図４、５、６に示すように、ファンがオープンループ(Open Loop)測定回転速度制御を行う時、該ＩＣを通して前記ＰＷＭ信号を読取り補償演算を行った後、前記補償値を求める。次に該ＩＣはＰＷＭ信号より前記補償値をマイナス或いはプラスし、これにより補償後のＰＷＭ信号を求める(図4参照)。こうして前記ＩＣは補償後のＰＷＭ信号に基づきファンの回転速度を制御し、ファン回転速度はＰＷＭ作動周期に対応する曲線補償を経た後、直線でかつ帯ではなく線性の効果を呈し(図5参照)、しかもファン回転速度の安定が達成できる。 Furthermore, as shown in FIG. 4, 5 and 6, the fans when performing open loop (Open Loop) measuring the rotational speed control, after the reading compensating computation the PWM signal through the IC, obtaining the compensation value . The IC then subtracts or adds the compensation value from the PWM signal, thereby obtaining a compensated PWM signal (see FIG. 4). Thus, the IC controls the rotational speed of the fan based on the compensated PWM signal, and the fan rotational speed is linear and exhibits a linearity effect instead of a band after undergoing curve compensation corresponding to the PWM operation cycle (see FIG. 5). ) In addition, stable fan rotation speed can be achieved.
以下に例を挙げ説明する。
9センチのファンがオープンループ測定回転速度制御を行う時、測定を経て、ファンのＰＷＭ作動周期100％時の回転速度が5000RPM(すなわち全速)であることが分かる。つまり、それは50％における理想の回転速度値は2500RPMであるべきだが、ファンモーターの素因により、実際にはＰＷＭ作動周期50％時のファンの回転速度は3000RPMであるため、前記理想的回転速度値が必要なＰＷＭ作動周期は40％であるはずで、補償が必要である。もとのＰＷＭ作動周期50％からＰＷＭ作動周期10％ (すなわち前記補償値) をマイナスし、必要なＰＷＭ作動周期40％を求める。こうしてファン回転速度はＰＷＭに対応し作動周期の曲線補償を経た後、直線かつ線性の効果を呈する。
An example will be described below.
When a 9 cm fan performs open loop measurement rotational speed control, it can be seen that the rotational speed when the PWM operating period of the fan is 100% is 5000 RPM (ie, full speed). In other words, the ideal rotation speed value at 50% should be 2500RPM, but due to the premise of the fan motor, the rotation speed of the fan at the PWM operation cycle of 50% is actually 3000RPM. The required PWM operating period should be 40% and compensation is required. The PWM operation cycle of 10% (that is, the compensation value) is subtracted from the original PWM operation cycle of 50% to obtain a necessary PWM operation cycle of 40%. In this way, the fan rotation speed corresponds to PWM, and after performing the curve compensation of the operation cycle, exhibits a linear and linear effect.
ファン回転速度とＰＷＭ作動周期の曲線指示図である図６、７に示すように、図中では補償前の回転速度曲線B1(すなわち公知の上放物線F1)をセクション分割方式により(三セクション、四セクション等に分ける)補償演算を行い、その後に補償後の回転速度曲線B2(すなわち本最適実施の線性(すなわち直線)曲線F2)を得る。前記補償演算を行うステップを以下に説明する。
(400)スタート
(401)前記補償前の回転速度曲線B1をＰＷＭ作動周期0％からＰＷＭ作動周期100％までの間を三セクションに分け補償演算を行う。図６中から分かるように、第一セクションはＰＷＭ作動周期０％からＸ％までの間で補償演算を行い、第二セクションはＰＷＭ作動周期Ｘ％からＹ％までの間で補償演算を行い、第三セクションはＰＷＭ作動周期Ｙ％から１００％までの間で補償演算を行う。前記Ｘ％とＹ％の値は、Ｘ％は３０％、Ｙ％は７０％のように、事前に予知する数値であり、且つ該数値は補償前の回転速度曲線の変化により分かる。
(402)先ず、該第一セクションは直角三角形を区画し、その斜率(m＝Δy／Δx：傾斜率)に対して補償演算後、第一直線L1を求める。前記斜率の補償演算は、既知の０％とＸ％の
２点の内挿法(補間法)によって斜率を求める。（即ち、前記第一直線L1）
(403)次に、該第二セクションは平行四辺形を区画し、その斜率に対して補償演算後、第二直線L2を求める。前記斜率の補償演算は、既知のＸ％とＹ％の２点の内挿法によって
斜率を求める。（即ち、前記第二直線L2）
(404)該第三セクションは直角三角形を区画し、その斜率に対して補償演算後、第三直線L3を求める。前記斜率の補償演算は、既知のＹ％と１００％の２点の内挿法によって斜
率を求める。（即ち、前記第三直線L3）
(405)前記第一直線、第二直線及び第三直線を統合後、補償後曲線B2を求める。
(406)終了
上述は、本発明の好適な実施例であり、本発明を実施する時、前記PWM作動周期0% 〜１００％間の補償演算を三段階に分けて行うことを限定せず、四段、五段、六段、七段・・・等に分けて補償演算することも可能であり、分段数を多くするほど、補償後の回転速度曲線は直線に近づき、更に好適な線性化を得られる。
したがって、前実施例と同様に、本発明の本実施例のファン回転速度はＰＷＭ作動周期の線性に対応し(すなわち直線)曲線B2は明確に公知ファンの上放物線B1に比べスムーズで、しかも、帯状でなない線性である。
As shown in FIGS. 6 and 7 which are curve indication diagrams of the fan rotation speed and the PWM operation cycle, the rotation speed curve B1 before compensation (that is, a known upper parabola F1) is divided into sections (three sections, four). Compensation calculation (divided into sections and the like) is performed, and then a rotational speed curve B2 after compensation (that is, the linearity (ie, straight line) curve F2 of the optimum implementation) is obtained. The step of performing the compensation calculation will be described below.
(400) Start
(401) The rotational speed curve B1 before compensation is divided into three sections from 0% PWM operation period to 100% PWM operation period, and compensation calculation is performed. As can be seen from FIG. 6, the first section performs a compensation operation between 0% and X% of the PWM operation cycle, and the second section performs a compensation operation between the PWM operation cycle of X% and Y%. The third section performs a compensation calculation between the PWM operation period Y% and 100%. The values of X% and Y% are numerical values that are predicted in advance, such as 30% for X% and 70% for Y%, and the numerical values can be understood from changes in the rotational speed curve before compensation.
(402) First, the first section divides a right triangle, and after the compensation calculation for the inclination rate (m = Δy / Δx: inclination rate), the first straight line L1 is obtained. In the compensation calculation of the oblique rate, the oblique rate is obtained by a known interpolation method (interpolation method) of two points of 0% and X%. (That is, the first straight line L1)
(403) Next, the second section defines a parallelogram, and after the compensation calculation for the oblique rate, a second straight line L2 is obtained. In the compensation operation of the oblique rate, the oblique rate is obtained by an interpolation method of two known points of X% and Y%. (That is, the second straight line L2)
(404) The third section divides a right triangle, and after the compensation calculation for the oblique rate, a third straight line L3 is obtained. In the compensation operation of the oblique rate, the oblique rate is obtained by an interpolation method of two known points of Y% and 100%. (That is, the third straight line L3)
(405) After the first straight line, the second straight line and the third straight line are integrated, a post-compensation curve B2 is obtained.
(406) EndThe above is a preferred embodiment of the present invention, and when implementing the present invention, it is not limited to performing the compensation calculation between the
Therefore, as in the previous embodiment, the fan rotation speed of this embodiment of the present invention corresponds to the linearity of the PWM operating cycle (i.e., a straight line), and the curve B2 is clearly smoother than the known parabola B1, and moreover, Linearity that is not strip-shaped.
以上のように、本発明の各実施例は、ＩＣにより補償後のＰＷＭ信号を提供し、ファン回転速度を制御し、ファンの回転速度は曲線補償を経た後、直線かつ帯ではなく線性を呈するのでファン回転速度が安定し、オープンループの制御曲線(すなわち、ファン回転速度とＰＷＭ作動周期の曲線図)を直線性に設計するので回路を別に増設しなくてもよくパーツコストも増加せず、各ファンモーターの特性は異なるがファン回転速度の規格に対して設計しやすい。
なお、上記の各実施例は本発明を限定するものではない。当該技術を熟知する者なら誰でも、本発明が掲示する技術内容に基づき、本発明の製品と領域を脱しない範囲内で各種の変動や潤色を加えることができ、したがって本発明の保護範囲は、特許請求の範囲で指定した内容を基準とする。
As described above, each embodiment of the present invention provides a PWM signal after compensation by an IC, controls the fan rotation speed, and the fan rotation speed exhibits linearity instead of a straight line and a band after curve compensation. Therefore, the fan rotation speed is stable, and the open loop control curve (i.e., the curve diagram of the fan rotation speed and PWM operation cycle) is designed to be linear, so there is no need to add another circuit and the part cost does not increase. Although the characteristics of each fan motor are different, it is easy to design for fan speed standards.
In addition, each said Example does not limit this invention. Anyone who is familiar with the technology can add various variations and colours within the scope of the product and area of the present invention based on the technical contents posted by the present invention. Based on the contents specified in the claims.
A2 下放物線
F2 線性曲線
B1 補償前曲線
B2 補償後曲線
L1 第一直線
L2 第二直線
L3 第三直線
A2 Lower parabola
F2 linearity curve
B1 Pre-compensation curve
B2 Curve after compensation
L1 first straight line
L2 2nd straight line
L3 3rd straight line
Claims (2)
前記複数の作動周期の範囲ごとに、補償後のＰＷＭ信号が、出力が小さくなる方向を下方向とした場合の下放物線関係を示すように、前記ＰＷＭ信号の作動周期(%)から補償値たる前記比率(%)をマイナスし、
前記複数の作動周期の範囲ごとに、前記補償後のＰＷＭ信号の作動周期に対する前記ファンの回転速度が前記直線関係を示すべく、前記ＩＣは前記補償後のＰＷＭ信号に基づき、ファンの回転速度をオープンループ制御する
ことを特徴とするファン回転速度直線補償方法。 The PWM signal related to the rotation of the fan is read via the IC, and the compensation operation is performed for each of a plurality of operation cycle ranges in the curve relationship indicated by the rotation speed of the fan with respect to the operation cycle of the PWM signal, and the operation cycle is 100%. Rotation speed based on the curve relationship from the ideal rotation speed (R1) based on the linear relationship that approximates the curve relationship at the predetermined operation cycle within the range with respect to the maximum rotation speed (R (MAX)) at the time ( R2) to find a compensation value that is the ratio of the increment (ΔR = R2-R1) (ΔR / R (MAX) × 100%)
For each range of the plurality of operation period, the PWM signal after compensation, as shown below parabolic relationship when the direction in which the output is reduced to the lower direction, serving as compensation value from the operating cycle of the PWM signal (%) the ratios (%) were minus,
For each range of the plurality of operation period, to the rotational speed of the fan for the operating cycle of the PWM signal after the compensation showing the linear relationship, the IC based on the PWM signal after the compensation, the rotational speed of the fan A fan rotational speed linear compensation method characterized by open loop control.
補償前の前記ＰＷＭ信号の作動周期に対する前記ファンの回転速度の関係を示す曲線をＰＷＭ作動周期0％〜100％の間でセクション分割し、
分割された第一セクションは直角三角形で近似し、当該直角三角形の斜率に対して補償演算して第一直線を求め、
分割された第二セクションは平行四辺形で近似し、当該平行四辺形の斜率に対して補償演算して第二直線を求め、
分割された第三セクションは直角三角形で近似し、当該直角三角形の斜率に対して補償演算して第三直線を求め、
該第一直線、該第二直線及び該第三直線を統合して補償後の回転速度曲線を求める
ことを特徴とする請求項１記載のファン回転速度直線補償方法。 The compensation operation is
A curve indicating the relationship of the rotation speed of the fan to the operation period of the PWM signal before compensation is divided into sections between 0% and 100% of the PWM operation period,
The divided first section is approximated by a right triangle, and the first straight line is obtained by performing a compensation operation on the slope of the right triangle,
The divided second section is approximated by a parallelogram, and a compensation calculation is performed on the slope of the parallelogram to obtain a second straight line.
The divided third section is approximated by a right triangle, and the third straight line is obtained by performing a compensation operation on the slope of the right triangle,
The fan rotational speed straight line compensation method according to claim 1, wherein the first rotational straight line, the second straight line, and the third straight line are integrated to obtain a compensated rotational speed curve.
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| GB2536195A (en) * | 2015-02-18 | 2016-09-14 | Melexis Technologies Nv | A single phase motor drive circuit and a method of driving a single phase motor |
| CN106208828B (en) | 2015-05-27 | 2020-09-29 | 罗姆股份有限公司 | Motor drive device, motor drive IC, and cooling device and electronic apparatus using the same |
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