JPH1150993A - Dc fan driving circuit, method for starting dc fan, method for dc fan drive controlling - Google Patents
Dc fan driving circuit, method for starting dc fan, method for dc fan drive controllingInfo
- Publication number
- JPH1150993A JPH1150993A JP9211992A JP21199297A JPH1150993A JP H1150993 A JPH1150993 A JP H1150993A JP 9211992 A JP9211992 A JP 9211992A JP 21199297 A JP21199297 A JP 21199297A JP H1150993 A JPH1150993 A JP H1150993A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- fan
- fans
- starting
- terminal
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 12
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
- F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
-
- 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
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/85—Starting
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Motor And Converter Starters (AREA)
- Control Of Multiple Motors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は複数台のＤＣファン
を用いる機器のＤＣファン駆動回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC fan drive circuit for a device using a plurality of DC fans.
【０００２】[0002]
【従来の技術】近年機器で小型化や高密度化に伴い、機
器の放熱を自然対流だけでまかないきれない場合があ
り、その対策の１としてファンを用いて強制対流させる
方法がある。このファンの電源方式としてＡＣ式とＤＣ
式があるが、一般的に使い勝手の良いＤＣ式が用いられ
ている。また、機器の場所によって必要な冷却量や許容
出来る騒音が異なっており、各々のファンに対する要求
も異なっている。よって、各々の要求に合ったファンを
採用するのが理想であるがコストを考慮した場合、最低
限の種類を採用し電源電圧を各々変えることで風量を変
え対応している。2. Description of the Related Art In recent years, with the miniaturization and high-density of equipment, there is a case where the heat radiation of the equipment cannot be covered only by natural convection, and there is a method of forcibly convection using a fan as one of the measures. AC type and DC type
Although there is a formula, a DC formula that is easy to use is generally used. Also, the required cooling amount and allowable noise differ depending on the location of the equipment, and the requirements for each fan also differ. Therefore, it is ideal to adopt a fan that meets each requirement. However, in consideration of cost, the minimum type is adopted and the power supply voltage is changed to change the air flow to cope with the cost.
【０００３】また、電源電圧を各々変える方法として個
別に電源を用意するのが理想であるが、これも前記同様
コストを考慮した場合、ファンを駆動させるために必要
十分な電源から、各々抵抗器を直列に接続されたファン
電源として利用する。すなわち、抵抗器の抵抗値によっ
て、駆動に必要な電流による電圧降下が変わりファンの
風量を各々制御することが出来る。ここでの問題は、フ
ァンの通常動作時の電流より起動時の電流が大きいの
で、抵抗器による電圧降下が大きくなり、その結果、フ
ァン起動時に必要な電源電圧以下になることがあって、
ファンが起動できないことがある。It is ideal to individually prepare power supplies as a method of changing the power supply voltage. However, in consideration of the cost as in the above case, each of the power supplies is changed from a necessary and sufficient power supply for driving the fan to a resistor. Are used as fan power supplies connected in series. That is, the voltage drop due to the current required for driving changes depending on the resistance value of the resistor, and the airflow of the fan can be controlled individually. The problem here is that the current at startup is larger than the current during normal operation of the fan, so the voltage drop due to the resistor becomes large, and as a result, the power supply voltage required at the time of fan startup may become less than
The fan may not start.
【０００４】複数台のＤＣファンを各々異なった条件で
駆動させる場合、一般的に図２に示すようなＤＣファン
駆動回路が用いられる。図示のＤＣファン駆動動回路
は、電源ライン２１と、この電源ライン２１に第１のフ
ァン風量制御抵抗器２２−１を介して接続された第１の
ファン２３−１と、電源ライン２１に第２のファン風量
制御抵抗器２２−２を介して接続された第２のファン２
３−２とを有する。図示の例では、２台のファンを使用
する場合の例を示しているが、３台以上のファンを使用
する場合も同様に構成される。When a plurality of DC fans are driven under different conditions, a DC fan drive circuit as shown in FIG. 2 is generally used. The illustrated DC fan drive circuit includes a power supply line 21, a first fan 23-1 connected to the power supply line 21 via a first fan air volume control resistor 22-1, and a power supply line 21. Second fan 2 connected via the second fan airflow control resistor 22-2
3-2. In the illustrated example, an example in which two fans are used is shown, but a configuration in which three or more fans are used is similarly configured.
【０００５】また、他の従来のＤＣファン駆動回路とし
て、図３に示されたものが知られてている。このＤＣフ
ァン駆動回路は、三端子レギュレータ等の電源インピー
ダンスの低いものを電源として用いている。すなわち、
図示のＤＣファン起動回路は、電源ライン３１と、この
電源ライン３１に入力端が接続された三端子レギュレー
タ３２と、この三端子レギュレータ３２の出力端に電源
供給端子が接続されて、接地端子が接地されたファン３
３とを有する。[0005] As another conventional DC fan drive circuit, the one shown in FIG. 3 is known. This DC fan drive circuit uses a low power supply impedance such as a three-terminal regulator as a power supply. That is,
The illustrated DC fan starting circuit includes a power supply line 31, a three-terminal regulator 32 having an input terminal connected to the power supply line 31, a power supply terminal connected to an output terminal of the three-terminal regulator 32, and a ground terminal. Grounded fan 3
And 3.
【０００６】尚、本発明に関連する先行技術も種々知ら
れてる。例えば、特開平７−３１１９０号公報（以下、
先行技術１と呼ぶ）には、サーミスタを用いて周囲温度
を検知しながらＤＣファンの風量を制御する技術思想が
開示されている。また、実開平３−１１３９５７号公報
（以下、先行技術２と呼ぶ）には、ファン自体を冷却す
る技術思想が開示されている。[0006] Various prior arts related to the present invention are also known. For example, Japanese Patent Application Laid-Open No. 7-31190 (hereinafter, referred to as
(Referred to as Prior Art 1) discloses a technical idea of controlling the airflow of a DC fan while detecting the ambient temperature using a thermistor. Japanese Utility Model Laid-Open No. 3-113957 (hereinafter referred to as Prior Art 2) discloses a technical idea of cooling a fan itself.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、図２に
示したＤＣファン駆動回路では、起動時に駆動時に必要
な電流の２〜５倍程度の起動電流が必要となる。その
為、抵抗器と起動電流による電圧降下が大きくなり、供
給電圧が下がり、この供給電圧が最低定格電圧以下（一
般的に最大定格電圧の５０％）となり起動できないこと
がある。However, the DC fan drive circuit shown in FIG. 2 requires a starting current of about 2 to 5 times the current required for driving at the time of starting. For this reason, the voltage drop due to the resistor and the starting current increases, the supply voltage decreases, and the supply voltage may become lower than the minimum rated voltage (generally, 50% of the maximum rated voltage), and starting may not be performed.
【０００８】その対策として、図３に示されたものが用
いられている。しかしながら、図３に示したＤＣファン
駆動回路では、複数台のＤＣファンを各々異なった条件
で駆動させる場合、個々に電源を設けるかＤＣファンの
種類を変える必要があり、コストアップの要因となる。As a countermeasure, the one shown in FIG. 3 is used. However, in the DC fan drive circuit shown in FIG. 3, when driving a plurality of DC fans under different conditions, it is necessary to provide a power supply individually or to change the type of the DC fan, which causes a cost increase. .
【０００９】したがって、本発明の課題は、起動時に各
々のＤＣファンに起動電圧を供給して、確実にＤＣファ
ンを駆動させることができるＤＣファン駆動回路を提供
することにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a DC fan driving circuit that can supply a starting voltage to each DC fan at the time of starting and can reliably drive the DC fan.
【００１０】また、本発明の課題は、最小限の回路規模
で各人にＤＣファンを起動することできるＤＣファン駆
動回路を提供することにある。It is another object of the present invention to provide a DC fan drive circuit that can start a DC fan for each person with a minimum circuit scale.
【００１１】尚、上記先行技術１は本発明の目的である
確実にＤＣファンを起動させるものではなく、手法も全
く異なるものである。また、先行技術２も、本発明の目
的である機器の冷却の分野のものでなく、手法も全く異
なるものである。The prior art 1 does not reliably start the DC fan, which is the object of the present invention, and the method is completely different. Further, Prior Art 2 is not in the field of cooling equipment which is the object of the present invention, and the technique is completely different.
【００１２】[0012]
【課題を解決するための手段】本発明によれば、各々が
電源供給端子と接地端子とをもつ第１乃至第ｎ（ｎは２
以上の整数）のＤＣファンと、電源ラインと第１乃至第
ｎのＤＣファンの電源供給端子との間にそれぞれ接続さ
れて、第１乃至第ｎのＤＣファンの風量を制御する第１
乃至第ｎの抵抗器とを有するＤＣファン駆動回路におい
て、起動用別電源と、この起動用別電源と第１乃至第ｎ
のＤＣファンの電源供給端子との間に、それぞれ、起動
用別電源から電源供給端子へ順方向になるように接続さ
れた第１乃至第ｎのダイオードとを備えたＤＣファン駆
動回路が得られる。According to the present invention, first to n-th (n is 2) each having a power supply terminal and a ground terminal.
(The above integer), and a first fan connected between a power supply line and a power supply terminal of each of the first to n-th DC fans to control the airflow of the first to n-th DC fans.
In the DC fan drive circuit having the first to n-th resistors, the separate power supply for starting, the separate power supply for starting and the first to n-th
And a first to n-th diode respectively connected between the separate power supply for starting and the power supply terminal in a forward direction between the power supply terminals of the DC fan. .
【００１３】上記ＤＣファン駆動回路において、起動用
別電源は、ＤＣファン起動時に第１乃至第ｎのＤＣファ
ンの各々に起動電流を供給し、ＤＣファン駆動時には第
１乃至第ｎのダイオードを用いて起動電流を止める働き
を行うことが好ましい。また、起動用別電源は、例え
ば、電源ラインに一端が接続され、他端が接地され、出
力端子より微分波形の出力電圧を出力する微分回路と、
微分回路の出力端子に制御端子が接続され、電源ライン
に第１の主電極端子が接続され、第１乃至第ｎのダイオ
ードの各々のアノードに第２の主電極端子が接続された
スイッチング素子とから構成される。上記微分回路は、
例えば、電源ラインに一端が接続され、他端が出力端子
に接続されたコンデンサと、出力端子に一端が接続さ
れ、他端が接地された抵抗器とから成るＣＲ微分回路で
ある。上記スイッチング素子は、例えば、制御端子とし
てベースを、第１の主電極端子としてコレクタを、第２
の主電極端子としてエミッタを持つ、ｎｐｎ形バイポー
ラトランジスタである。In the DC fan driving circuit, the separate power supply for starting supplies a starting current to each of the first to nth DC fans when the DC fan is started, and uses the first to nth diodes when driving the DC fan. It is preferable to perform a function of stopping the starting current. In addition, the separate power supply for starting, for example, one end is connected to the power supply line, the other end is grounded, and a differentiating circuit that outputs an output voltage of a differential waveform from an output terminal,
A switching element having a control terminal connected to the output terminal of the differentiating circuit, a first main electrode terminal connected to the power supply line, and a second main electrode terminal connected to each anode of the first to n-th diodes; Consists of The differentiating circuit is
For example, the CR differentiating circuit includes a capacitor having one end connected to the power supply line and the other end connected to the output terminal, and a resistor having one end connected to the output terminal and the other end grounded. The switching element includes, for example, a base as a control terminal, a collector as a first main electrode terminal,
Is an npn-type bipolar transistor having an emitter as a main electrode terminal.
【００１４】また、本発明によれば、電源ラインに各々
がそれぞれの抵抗器を介して接続された複数台のＤＣフ
ァンを起動する方法であって、起動時に電源ラインから
抵抗器を介して複数台のＤＣファンに供給される供給電
流とは別に、別電源からの起動電流をも複数台のＤＣフ
ァンへ供給することを特徴とするＤＣファン起動方法が
得られる。Further, according to the present invention, there is provided a method for starting a plurality of DC fans, each connected to a power supply line via a respective resistor, wherein a plurality of DC fans are connected from the power supply line via the resistors at the time of startup. In addition to the supply current supplied to one DC fan, a DC fan starting method characterized in that a startup current from another power supply is also supplied to a plurality of DC fans.
【００１５】更に、本発明によれば、電源ラインに各々
がそれぞれの抵抗器を介して接続された複数台のＤＣフ
ァンの駆動を制御する方法であって、複数台のＤＣファ
ンの起動時に、電源ラインから抵抗器を介して複数台の
ＤＣファンに供給される供給電流とは別に、別電源から
の起動電流をも複数台のＤＣファンへ供給するステップ
と、複数台のＤＣファンの駆動時に、起動電流を停止す
るステップとを含むことを特徴とするＤＣファン駆動制
御方法が得られる。Further, according to the present invention, there is provided a method for controlling the driving of a plurality of DC fans, each connected to a power supply line via a respective resistor, wherein when the plurality of DC fans are started, In addition to the supply current supplied from the power supply line to the plurality of DC fans via the resistor, a step of supplying a starting current from another power supply to the plurality of DC fans, and the step of driving the plurality of DC fans. And stopping the starting current.
【００１６】[0016]
【作用】複数台のＤＣファンの各々に最小定格電圧がフ
ァン風量制御抵抗器の抵抗値と関係なく供給されるの
で、ＤＣファンの起動が失敗することを防止できる。ま
た、別電源が１つですむなど最小回路規模で実現でき、
コストダウンと品質信頼性の大幅な向上が期待できる。Since the minimum rated voltage is supplied to each of the plurality of DC fans irrespective of the resistance value of the fan air volume control resistor, it is possible to prevent the DC fan from failing to start. In addition, it can be realized with a minimum circuit scale, such as only one separate power supply is required.
Cost reduction and significant improvement in quality reliability can be expected.
【００１７】[0017]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照して詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１８】図１を参照して、本発明の一実施の形態に
係るＤＣファン駆動回路について説明する。図示のＤＣ
ファン駆動回路は、図２に示した従来技術の形式を用い
ているが、ダイオードを介してインピーダンスが十分に
低い起動用別電源を接続している点が、図２に示したも
のと異なる。Referring to FIG. 1, a DC fan drive circuit according to one embodiment of the present invention will be described. DC shown
The fan drive circuit uses the conventional type shown in FIG. 2, but differs from the one shown in FIG. 2 in that a separate power supply for starting having a sufficiently low impedance is connected via a diode.
【００１９】すなわち、図示のＤＣファン駆動回路は、
電源ライン１１と、第１および第２のファン風量制御抵
抗器１２−１，１２−２と、第１および第２のファン１
３−１，１３−２と、起動用別電源１４と、第１および
第２のダイオード１５−１，１５−２とから構成されて
いる。第１のファン風量制御抵抗器１２−１は、電源ラ
イン１１と第１のＤＣファン１３−１の電源供給端子と
の間に接続されて、第１のＤＣファン１３−１の風量を
制御するためのものである。同様に、第２のファン風量
制御抵抗器１２−２は、電源ライン１１と第２のＤＣフ
ァン１３−１の電源供給端子との間に接続されて、第２
のＤＣファン１３−２の風量を制御するためのものであ
る。第１のダイオード１５−１は、起動用別電源１４と
第１のＤＣファン１３−１の電源供給端子との間に、起
動用別電源１４から電源供給端子へ順方向になるように
接続されている。同様に、第２のダイオード１５−２
は、起動用別電源１４と第２のＤＣファン１３−２の電
源供給端子との間に、起動用別電源１４から電源供給端
子へ順方向になるように接続されている。That is, the illustrated DC fan drive circuit is
A power supply line 11, first and second fan air volume control resistors 12-1 and 12-2, and first and second fans 1;
3-1 and 13-2, a separate power supply 14 for starting, and first and second diodes 15-1 and 15-2. The first fan air volume control resistor 12-1 is connected between the power supply line 11 and a power supply terminal of the first DC fan 13-1 to control the air volume of the first DC fan 13-1. It is for. Similarly, the second fan air volume control resistor 12-2 is connected between the power supply line 11 and the power supply terminal of the second DC fan 13-1, and
Of the DC fan 13-2. The first diode 15-1 is connected between the separate power supply 14 for starting and the power supply terminal of the first DC fan 13-1 so as to be in a forward direction from the power supply 14 for separate activation to the power supply terminal. ing. Similarly, the second diode 15-2
Is connected between the separate power supply 14 for start-up and the power supply terminal of the second DC fan 13-2 so as to be forward from the power supply 14 for separate start-up to the power supply terminal.
【００２０】起動用別電源１４から供給される起動電圧
の電圧値は、第１および第２のファン１３−１，１３−
２の最小定格電圧とダイオード順方向電圧とを合わせた
電圧よりも高く設定してある。また、第１および第２の
ファン風量制御抵抗器１２−１，１２−２の抵抗値は、
ファン駆動時において電源ライン１１から第１および第
２のファン風量制御抵抗器１２−１，１２−２を介して
第１および第２のファン１３−１，１３−２に供給され
る供給電圧が、上記第１および第２のダイオード１５−
１，１５−２を介して供給される起動電圧よりも高くな
るような値に設定される。The voltage value of the starting voltage supplied from the starting separate power supply 14 is determined by the first and second fans 13-1 and 13-.
2 is set higher than the combined voltage of the minimum rated voltage and the diode forward voltage. The resistance values of the first and second fan air volume control resistors 12-1 and 12-2 are
When the fan is driven, the supply voltage supplied from the power supply line 11 to the first and second fans 13-1 and 13-2 via the first and second fan air volume control resistors 12-1 and 12-2 is , The first and second diodes 15-
The value is set so as to be higher than the starting voltage supplied via the terminals 1 and 15-2.
【００２１】このような構成によれば、起動用別電源１
４は、ＤＣファン起動時に第１および第２のＤＣファン
１３−１．１３−２の各々に起動電流を供給するが、Ｄ
Ｃファン駆動時には第１および第２のダイオード１５−
１．１５−２を用いて起動電流を止める働きを行う。According to such a configuration, the separate power supply 1 for starting
4 supplies a starting current to each of the first and second DC fans 13-1.13-2 when the DC fan is started.
When the C fan is driven, the first and second diodes 15-
The function of stopping the starting current is performed by using 1.5-2.
【００２２】また、起動用別電源１４から供給される起
動電圧の電圧値は、ファンが変わっても同様であり、ま
た、ファン個々にダイオードを介して起動用別電源１４
を接続しているので、ファンの台数に関係なく１つで対
応できる。The voltage value of the starting voltage supplied from the starting separate power supply 14 is the same even if the fan is changed.
Is connected, so that one can be used regardless of the number of fans.
【００２３】[0023]
【実施例】次に、図４を参照して、図１のＤＣファン起
動回路に使用される起動用別電源１４の構成について説
明する。Next, referring to FIG. 4, the configuration of a separate power supply 14 for starting used in the DC fan starting circuit of FIG. 1 will be described.
【００２４】図示の起動用別電源１４は、時定数コンデ
ンサ１４−１と、時定数抵抗器１４−２と、スイッチ用
トランジスタ１４−３とから構成されている。時定数コ
ンデンサ１４−１は、その一端が電源ライン１１に接続
され、他端が出力端子１４ａに接続されている。また、
時定数抵抗器１４−２は、その一端が出力端子１４ａに
接続され、他端が接地されている。すなわち、時定数コ
ンデンサ１４−１と時定数抵抗器１４−２との組み合わ
せは、出力端子１４ａより微分波形の出力電圧を出力す
るＣＲ微分回路として働く。スイッチ用トランジスタ１
４−３はｎｐｎ形バイポーラトランジスタであって、制
御端子としてベースを、第１の主電極端子としてコレク
タを、第２の主電極端子としてエミッタを持つ。ベース
はＣＲ微分回路の出力端子１４ａに接続され、コレクタ
は電源ライン１１に接続され、エミッタは第１および第
２のダイオード１５−１，１５−２の各々のアノードに
接続されている。The separate starting power supply 14 shown in the figure comprises a time constant capacitor 14-1, a time constant resistor 14-2, and a switching transistor 14-3. The time constant capacitor 14-1 has one end connected to the power supply line 11 and the other end connected to the output terminal 14a. Also,
The time constant resistor 14-2 has one end connected to the output terminal 14a and the other end grounded. That is, the combination of the time constant capacitor 14-1 and the time constant resistor 14-2 functions as a CR differentiating circuit that outputs an output voltage having a differential waveform from the output terminal 14a. Transistor for switch 1
4-3, an npn-type bipolar transistor having a base as a control terminal, a collector as a first main electrode terminal, and an emitter as a second main electrode terminal. The base is connected to the output terminal 14a of the CR differentiating circuit, the collector is connected to the power supply line 11, and the emitter is connected to the anode of each of the first and second diodes 15-1 and 15-2.
【００２５】図示の例はファンが２台の例を示している
が、ファン風量制御抵抗器を電源ライン１１に、ダイオ
ードを起動用別電源１４のスイッチ用トランジスタ１４
−３のエミッタに接続することにより、ファンの台数を
増やすことが可能である。The illustrated example shows an example in which there are two fans. A fan air flow control resistor is connected to the power supply line 11 and a diode is connected to the switching transistor 14 of the separate power supply 14 for starting.
By connecting to the -3 emitter, the number of fans can be increased.
【００２６】次に、図４に示したＤＣファン駆動回路の
動作について説明する。機器の電源（図示せず）が投入
されと、電源ライン１１に電源電圧が供給される。この
時、時定数コンデンサ１４−１と時定数抵抗器１４−２
とによって、スイッチ用トランジスタ１４−３のベース
電圧がＣＲ微分回路の時定数（時定数コンデンサ１４−
１の容量値と時定数抵抗器１４−２の抵抗値とによって
規定される）時間だけ上がる。このとき、スイッチ用ト
ランジスタ１４−３が活性化状態となり、スイッチ用ト
ランジスタ１４−３のエミッタのインピーダンスの低い
起動用別電源１４となる。この起動用別電源１４からの
微分波形をもつ起動電圧（起動電流）は、第１および第
２のダイオード１５−１，１５−２を介して第１および
第２のファン１３−１，１３−２に供給される。Next, the operation of the DC fan drive circuit shown in FIG. 4 will be described. When a power supply (not shown) of the device is turned on, a power supply voltage is supplied to the power supply line 11. At this time, the time constant capacitor 14-1 and the time constant resistor 14-2
As a result, the base voltage of the switching transistor 14-3 becomes equal to the time constant (time constant capacitor 14-
(Defined by the capacitance value of 1 and the resistance value of the time constant resistor 14-2). At this time, the switching transistor 14-3 is activated, and becomes the starting power supply 14 having a low impedance of the emitter of the switching transistor 14-3. A starting voltage (starting current) having a differentiated waveform from the starting separate power supply 14 is supplied via the first and second diodes 15-1 and 15-2 to the first and second fans 13-1 and 13-. 2 is supplied.
【００２７】機器の電源を投入した時点からＣＲ微分回
路の時定数の時間経過すると、スイッチ用トランジスタ
１４−３のベース電圧が下がり、スイッチ用トランジス
タ１４−３のエミッタ電圧も下がる。この時、第１およ
び第２のファン１３−１，１３−２と電源ライン１１と
の間に接続されている第１および第２のファン風量制御
抵抗器１２−１，１２−２を介して機器の電源より電源
電圧が、第１および第２のファン１３−１，１３−２の
電源供給端子へ供給電圧として供給される。この供給電
圧は上記起動電圧よりも高いので、第１および第２のダ
イオード１５−１，１５−２は逆バイアス状態となり、
起動用別電源１４からの起動電流が止まる。When the time of the time constant of the CR differentiating circuit elapses from the time when the power of the device is turned on, the base voltage of the switching transistor 14-3 decreases, and the emitter voltage of the switching transistor 14-3 also decreases. At this time, via the first and second fan air volume control resistors 12-1 and 12-2 connected between the first and second fans 13-1 and 13-2 and the power supply line 11. A power supply voltage is supplied from a power supply of the device to the power supply terminals of the first and second fans 13-1 and 13-2 as a supply voltage. Since this supply voltage is higher than the starting voltage, the first and second diodes 15-1 and 15-2 are in a reverse bias state,
The starting current from the separate power source for starting 14 stops.
【００２８】このように、電源投入時のファン起動を専
用の回路で賄うため、個々のファンを駆動する回路は極
めて単純となると共に、制御範囲を大きくできる。As described above, since the startup of the fan at the time of turning on the power is covered by the dedicated circuit, the circuit for driving each fan is extremely simple and the control range can be increased.
【００２９】本発明について特定の実施の形態によって
説明したけれども、当業者は本発明の範囲を逸脱しない
で種々の変更が可能であることが詳細に理解できるだろ
う。例えば、起動用別電源は上述した実施例のものに限
定せず、種々の変形が可能である。例えば、ＣＲ微分回
路以外の他の微分回路を使用しても良い。また、スイッ
チング手段もｎｐｎ形バイポーラトランジスタに限定さ
れず、他のスイッチング手段を使用しても良い。Although the present invention has been described with reference to specific embodiments, those skilled in the art will recognize in detail that various modifications may be made without departing from the scope of the invention. For example, the separate power supply for starting is not limited to the above-described embodiment, and various modifications are possible. For example, a differentiating circuit other than the CR differentiating circuit may be used. Further, the switching means is not limited to the npn-type bipolar transistor, and other switching means may be used.
【００３０】[0030]
【発明の効果】以上説明したように、本発明では、ファ
ン起動時の電流を別電源を新たに設けて供給している。
この別電源は、インピーダンスの低いものでファン起動
時に必要に起動電圧（起動電流）をファンに供給する。
よって、ファン起動時にインピーダンスの低い電源とな
り、ファンの起動が確実に行える。また、本発明ではダ
イオードによって個々に回路が切り離されるので、複数
台のファンでも１つの別電源で対応できる。As described above, in the present invention, the current at the time of starting the fan is supplied by providing a separate power supply.
This separate power supply has a low impedance and supplies a starting voltage (starting current) to the fan as required when the fan is started.
Therefore, when the fan is started, the power source becomes low in impedance, and the fan can be started reliably. Also, in the present invention, since the circuits are individually separated by the diodes, even a plurality of fans can be handled by one separate power supply.
【図１】本発明の一実施の形態に係るＤＣファン駆動回
路の構成を示すブロック図である。FIG. 1 is a block diagram showing a configuration of a DC fan drive circuit according to one embodiment of the present invention.
【図２】従来のＤＣファン駆動回路の構成を示すブロッ
ク図である。FIG. 2 is a block diagram showing a configuration of a conventional DC fan drive circuit.
【図３】他の従来のＤＣファン駆動回路の構成を示すブ
ロック図である。FIG. 3 is a block diagram showing a configuration of another conventional DC fan drive circuit.
【図４】本発明の一実施例に係るＤＣファン駆動回路の
構成を示すブロック図である。FIG. 4 is a block diagram illustrating a configuration of a DC fan drive circuit according to one embodiment of the present invention.
１１ 電源ライン １２−１，１２−２ ファン風量制御抵抗器 １３−１，１３−２ ファン １４ 起動用別電源 １４−１ 時定数コンデンサ １４−２ 時定数抵抗器 １４−３ スイッチ用トランジスタ １５−１，１５−２ ダイオード 11 Power supply line 12-1, 12-2 Fan air volume control resistors 13-1, 13-2 Fan 14 Separate power supply for starting 14-1 Time constant capacitor 14-2 Time constant resistor 14-3 Switch transistor 15-1 , 15-2 Diode
Claims (7)
第１乃至第ｎ（ｎは２以上の整数）のＤＣファンと、電
源ラインと前記第１乃至第ｎのＤＣファンの前記電源供
給端子との間にそれぞれ接続されて、前記第１乃至第ｎ
のＤＣファンの風量制御する第１乃至第ｎの抵抗器とを
有するＤＣファン駆動回路において、 起動用別電源と、 該起動用別電源と前記第１乃至第ｎのＤＣファンの前記
電源供給端子との間に、それぞれ、前記起動用別電源か
ら前記電源供給端子へ順方向になるように接続された第
１乃至第ｎのダイオードとを備えたＤＣファン駆動回
路。1. A first to n-th (n is an integer of 2 or more) DC fans each having a power supply terminal and a ground terminal, and a power supply line and the power supply of the first to n-th DC fans. Between the first through n-th terminals.
A DC fan drive circuit having first to n-th resistors for controlling the air flow of the DC fan, comprising: a separate power supply for starting; a separate power supply for starting; and the power supply terminal of the first to n-th DC fans. And a first to n-th diodes respectively connected between the separate power supply for starting and the power supply terminal in a forward direction.
に前記第１乃至第ｎのＤＣファンにの各々に起動電流を
供給し、ＤＣファン駆動時には前記第１乃至第ｎのダイ
オードを用いて前記起動電流を止める働きを行うことを
特徴とする請求項１に記載のＤＣファン駆動回路。2. The starting separate power supply supplies a starting current to each of the first to nth DC fans when the DC fan is started, and uses the first to nth diodes when the DC fan is driven. The DC fan drive circuit according to claim 1, wherein the DC fan drive circuit performs a function of stopping the starting current.
力端子より微分波形の出力電圧を出力する微分回路と、 前記微分回路の出力端子に制御端子が接続され、前記電
源ラインに第１の主電極端子が接続され、前記第１乃至
第ｎのダイオードの各々のアノードに第２の主電極端子
が接続されたスイッチング素子とを有することを特徴と
する請求項２に記載のＤＣファン駆動回路。3. The different power supply for starting has one end connected to the power supply line, the other end grounded, and a differential circuit that outputs an output voltage of a differential waveform from an output terminal; and an output terminal of the differential circuit. A switching element having a terminal connected thereto, a first main electrode terminal connected to the power supply line, and a second main electrode terminal connected to each anode of the first to n-th diodes. The DC fan drive circuit according to claim 2, wherein
が接続され、他端が前記出力端子に接続されたコンデン
サと、前記出力端子に一端が接続され、他端が接地され
た抵抗器とから成るＣＲ微分回路である請求項３に記載
のＤＣファン駆動回路。4. The differentiating circuit includes a capacitor having one end connected to the power supply line and the other end connected to the output terminal, and a resistor having one end connected to the output terminal and the other end grounded. 4. The DC fan drive circuit according to claim 3, wherein the DC fan drive circuit is a CR differentiator circuit.
としてベースを、前記第１の主電極端子としてコレクタ
を、前記第２の主電極端子としてエミッタを持つ、ｎｐ
ｎ形バイポーラトランジスタである請求項３に記載のＤ
Ｃファン駆動回路。5. The switching device according to claim 1, wherein the switching element has a base as the control terminal, a collector as the first main electrode terminal, and an emitter as the second main electrode terminal.
The D according to claim 3, which is an n-type bipolar transistor.
C fan drive circuit.
介して接続された複数台のＤＣファンを起動する方法で
あって、起動時に前記電源ラインから前記抵抗器を介し
て前記複数台のＤＣファンに供給される供給電流とは別
に、別電源からの起動電流をも前記複数台のＤＣファン
へ供給することを特徴とするＤＣファン起動方法。6. A method of starting a plurality of DC fans, each connected to a power supply line via a respective resistor, wherein the plurality of DC fans are connected via the resistors from the power supply line at startup. A DC fan starting method, characterized in that a starting current from another power source is also supplied to the plurality of DC fans, separately from a supply current supplied to the fans.
介して接続された複数台のＤＣファンの駆動を制御する
方法であって、 前記複数台のＤＣファンの起動時に、前記電源ラインか
ら前記抵抗器を介して前記複数台のＤＣファンに供給さ
れる供給電流とは別に、別電源からの起動電流をも前記
複数台のＤＣファンへ供給するステップと、 前記複数台のＤＣファンの駆動時に、前記起動電流を停
止するステップとを含むことを特徴とするＤＣファン駆
動制御方法。7. A method for controlling the driving of a plurality of DC fans, each connected to a power supply line via a respective resistor, wherein the plurality of DC fans are activated from the power supply line when the plurality of DC fans are started. A step of supplying a starting current from another power source to the plurality of DC fans separately from a supply current supplied to the plurality of DC fans via a resistor; Stopping the starting current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09211992A JP3075344B2 (en) | 1997-08-06 | 1997-08-06 | DC fan drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09211992A JP3075344B2 (en) | 1997-08-06 | 1997-08-06 | DC fan drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1150993A true JPH1150993A (en) | 1999-02-23 |
| JP3075344B2 JP3075344B2 (en) | 2000-08-14 |
Family
ID=16615112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09211992A Expired - Fee Related JP3075344B2 (en) | 1997-08-06 | 1997-08-06 | DC fan drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3075344B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008143231A1 (en) * | 2007-05-22 | 2008-11-27 | Daikin Industries, Ltd. | Fan control system and air conditioner having the same |
-
1997
- 1997-08-06 JP JP09211992A patent/JP3075344B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008143231A1 (en) * | 2007-05-22 | 2008-11-27 | Daikin Industries, Ltd. | Fan control system and air conditioner having the same |
| JP2008291656A (en) * | 2007-05-22 | 2008-12-04 | Daikin Ind Ltd | Fan control system and air conditioning machine provided with fan control system thereof |
| US8773048B2 (en) | 2007-05-22 | 2014-07-08 | Daikin Industries, Ltd. | Fan control system and air conditioner that includes the same |
| US8801390B2 (en) | 2007-05-22 | 2014-08-12 | Daikin Industries, Ltd. | Fan control system and air conditioner that includes the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3075344B2 (en) | 2000-08-14 |
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