JP2003111478A - Fan motor provided with abnormal-revolution detecting circuit - Google Patents
Fan motor provided with abnormal-revolution detecting circuitInfo
- Publication number
- JP2003111478A JP2003111478A JP2001299107A JP2001299107A JP2003111478A JP 2003111478 A JP2003111478 A JP 2003111478A JP 2001299107 A JP2001299107 A JP 2001299107A JP 2001299107 A JP2001299107 A JP 2001299107A JP 2003111478 A JP2003111478 A JP 2003111478A
- Authority
- JP
- Japan
- Prior art keywords
- rotation speed
- fan motor
- abnormal
- circuit
- detection circuit
- 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.)
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- 230000002159 abnormal effect Effects 0.000 claims abstract description 48
- 238000001514 detection method Methods 0.000 claims description 53
- 238000004804 winding Methods 0.000 claims description 6
- 230000005856 abnormality Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 2
- 230000006866 deterioration Effects 0.000 claims 1
- 238000009423 ventilation Methods 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000009499 grossing Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 102100028175 Abasic site processing protein HMCES Human genes 0.000 description 1
- 101001006387 Homo sapiens Abasic site processing protein HMCES Proteins 0.000 description 1
- 101150080148 RR10 gene Proteins 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の利用される分野】本発明はフアンモータ、特に
異常回転数検出回路を備えるフアンモータに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan motor, and more particularly to a fan motor having an abnormal rotation speed detection circuit.
【０００２】[0002]
【従来の技術】図２は従来から実施されている異常回転
数検出回路を備えたフアンモータ駆動回路のブロック図
の一例を示すもので、１はホール素子、２は通電制御信
号発生回路、３は回転数指令回路、４は通電制御用スイ
ッチング回路、５はフアンモータの固定子巻線、６はホ
ール素子の出力を受けて回転数を電圧に変換するｆ／ｖ
変換回路を含む回転数検出回路、７は比較回路、８は回
転数の閾値発生回路、９は異常回転数検出信号の警報出
力端子である。2. Description of the Related Art FIG. 2 shows an example of a block diagram of a fan motor drive circuit provided with an abnormal rotation speed detection circuit which has been conventionally implemented. 1 is a hall element, 2 is an energization control signal generation circuit, 3 Is a rotation speed command circuit, 4 is a switching circuit for energization control, 5 is a stator winding of a fan motor, and 6 is an f / v that receives the output of a hall element and converts the rotation speed into a voltage.
A rotation speed detection circuit including a conversion circuit, 7 is a comparison circuit, 8 is a rotation speed threshold value generation circuit, and 9 is an alarm output terminal of an abnormal rotation speed detection signal.
【０００３】図２に示した回路は、図示はしていない
が、固定子巻線を備えた固定子と、該固定子と空隙を介
して対向し回転自在に軸支された永久磁石を有する回転
子と、前記永久磁石の磁極位置を検出するためのホール
素子を備える電動機を駆動制御するもので、前記ホール
素子の出力電圧を通電制御信号発生回路２に入力し、該
通電制御信号発生回路２の出力により通電制御用スイッ
チング回路４を制御して、前記固定子巻線に適宜通電し
て回転子を所定の方向に回転駆動するものである。対象
のフアンモータは、回転数指令回路３の指令に従って回
転するようになっている。Although not shown, the circuit shown in FIG. 2 has a stator provided with a stator winding, and a permanent magnet that is rotatably supported by the stator facing the stator via a gap. A drive control is performed for an electric motor including a rotor and a Hall element for detecting the magnetic pole position of the permanent magnet. The output voltage of the Hall element is input to an energization control signal generating circuit 2 to generate the energization control signal generating circuit. The output circuit 2 controls the energization control switching circuit 4 to appropriately energize the stator winding to rotationally drive the rotor in a predetermined direction. The target fan motor is adapted to rotate in accordance with a command from the rotation speed command circuit 3.
【０００４】本発明に係るフアンモータは、発熱部材を
内蔵する電子機器に併設され冷却用として使用されるも
のが多く、これらの電子機器は通常、冷却用フアンモー
タが正常に機能していることを前提に、動作が保証され
ている。従って、併設されるフアンモータが異常を来た
し回転数が低下すると、冷却性能が低下して当該電子機
器の動作にも異常が生じることになる。Many of the fan motors according to the present invention are used together for cooling for electronic equipment having a built-in heat generating member. In these electronic equipment, the cooling fan motor is normally functioning normally. Operation is guaranteed on the assumption that Therefore, when the attached fan motor becomes abnormal and the rotation speed decreases, the cooling performance decreases and the operation of the electronic device also becomes abnormal.
【０００５】上述の如き問題を解決するために、ｆ／ｖ
変換回路によりホール素子１の出力電圧を回転数に比例
した電圧に変換して、フアンモータの回転数を取得する
回転数検出回路６と、回転数の最低限界値を定めた閾値
発生回路８と、前記回転数検出回路６の出力と閾値発生
回路８の出力とを比較する比較回路７と共に、前記回転
数検出回路６の出力が閾値発生回路の出力より低いと判
定されたとき警報信号端子９から異常回転数検出の信号
を発する異常回転数検出回路を備え、フアンモータの回
転数低下による電子機器の故障発生を未然に防ぐように
なっている。To solve the above problems, f / v
A rotation speed detection circuit 6 that acquires the rotation speed of the fan motor by converting the output voltage of the Hall element 1 into a voltage that is proportional to the rotation speed by a conversion circuit, and a threshold value generation circuit 8 that determines the minimum limit value of the rotation speed. , And an alarm signal terminal 9 when it is determined that the output of the rotation speed detection circuit 6 is lower than the output of the threshold generation circuit together with the comparison circuit 7 that compares the output of the rotation speed detection circuit 6 and the output of the threshold generation circuit 8. Is provided with an abnormal rotation speed detection circuit that outputs an abnormal rotation speed detection signal to prevent occurrence of a failure in electronic equipment due to a decrease in the rotation speed of the fan motor.
【０００６】[0006]
【発明が解決しょうとする課題】ところが、上述の如き
異常回転数検出回路では、個々のフアンモータの回転数
低下を監視することは可能であるが、複数のフアンモー
タを同一の通風路に対し直列、又は並列に実装配置する
ような構成では新たな問題が生ずる。However, in the abnormal rotation speed detection circuit as described above, it is possible to monitor the decrease in the rotation speed of each fan motor, but a plurality of fan motors are connected to the same ventilation passage. A new problem arises in a configuration in which the components are mounted in series or in parallel.
【０００７】図３は、異常回転数検出回路を備える２つ
のフアンモータａ，ｂを同じ通風路に直列配置した例と
して示すが、今２つのフアンモータａ，ｂが動作してい
るとき、フアンモータｂの通電制御回路が故障して停止
状態となったとすると、フアンモータａの風Ｆは、フア
ンモータｂをも通過して流れるので、その結果風Ｆによ
りフアンモータｂの羽根が回転させられることになる。
この時、フアンモータｂが閾値以上の回転数で回転する
と、フアンモータｂの異常回転数検出回路はフアンモー
タｂの回転を正常と判断してしまい、異常回転数を検出
し得ず警報信号が出力されないので、フアンモータｂの
故障発生を見逃してしまうことになる。FIG. 3 shows an example in which two fan motors a and b having an abnormal rotation speed detection circuit are arranged in series in the same ventilation passage. When the two fan motors a and b are operating now, the fan motors a and b are in operation. If the energization control circuit of the motor b fails and is in a stopped state, the wind F of the fan motor a also flows through the fan motor b, and as a result, the blades of the fan motor b are rotated by the wind F. It will be.
At this time, if the fan motor b rotates at a rotation speed equal to or higher than the threshold value, the abnormal rotation speed detection circuit of the fan motor b determines that the rotation of the fan motor b is normal, and the abnormal rotation speed cannot be detected. Since it is not output, the failure occurrence of the fan motor b is overlooked.
【０００８】[0008]
【課題を解決する手段】本発明は、上述のような問題を
解決するために、異常回転数検出回路と共にフアンモー
タの通電電流を検出する通電電流検出回路を設け、該通
電電流検出信号の異常信号もしくは前記異常回転数検出
回路の異常信号、の何れかの信号により警報信号が出る
ように構成する。In order to solve the above problems, the present invention provides an abnormal rotation speed detection circuit and an energization current detection circuit for detecting an energization current of a fan motor, and an abnormality of the energization current detection signal. The alarm signal is output by either the signal or the abnormal signal of the abnormal rotation speed detection circuit.
【０００９】[0009]
【実施例】図１は本発明に成る回路図の一例を示すもの
で、図２に示す従来技術に成る異常回転数検出回路を備
えるフアンモータに、通電電流検出回路とワイアードオ
ア回路を追加したものである。図に見るように、該通電
電流検出回路は、フアンモータＭの電源端子Ｖと電源
（＋）との間に配置され、その両端が夫々分圧抵抗１
１，１２を介してオペアンプ１６’を有する差動増幅器
１３に接続されている電流検出抵抗１０を備え、前記差
動増幅器１３の出力がダイオード１４で整流され、コン
デンサ１５の平滑回路を介してオペアンプ１６の（＋）
側に接続されると共に、該オペアンプ１６の（−）側が
抵抗１７と抵抗１８の分圧点に、またオペアンプ１６の
出力がトランジスタ１９のベースに夫々接続され、該ト
ランジスタ１９のコレクタが抵抗２０を介して電源＋に
接続されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a circuit diagram according to the present invention. An energizing current detection circuit and a wired OR circuit are added to a fan motor having an abnormal rotation speed detection circuit according to the prior art shown in FIG. It is a thing. As shown in the drawing, the energization current detection circuit is arranged between the power supply terminal V of the fan motor M and the power supply (+), and both ends thereof are divided by the voltage dividing resistor 1 respectively.
1, a current detecting resistor 10 connected to a differential amplifier 13 having an operational amplifier 16 ′, an output of the differential amplifier 13 is rectified by a diode 14, and an operational amplifier is provided via a smoothing circuit of a capacitor 15. 16 (+)
And the (−) side of the operational amplifier 16 is connected to the voltage dividing points of the resistors 17 and 18, and the output of the operational amplifier 16 is connected to the base of the transistor 19, and the collector of the transistor 19 connects the resistor 20. Connected to the power supply + via.
【００１０】又、フアンモータＭの異常回転数検出信号
端子Ｓは、抵抗２１を介して電源（＋）とトランジスタ
２２のベースに接続され、該トランジスタ２２のコレク
タが前記トランジスタ１９のコレクタに接続されてワイ
アードオア回路を形成している。また、前記トランジス
タ１９のコレクタは、トランジスタ２３のベースに接続
され、該トランジスタ２３のコレクタが警報出力端子Ａ
に接続されている。The abnormal rotation speed detection signal terminal S of the fan motor M is connected to the power source (+) and the base of the transistor 22 via the resistor 21, and the collector of the transistor 22 is connected to the collector of the transistor 19. Form a wired or circuit. The collector of the transistor 19 is connected to the base of the transistor 23, and the collector of the transistor 23 has an alarm output terminal A.
It is connected to the.
【００１１】上述図１に示す回路の動作について説明す
る。フアンモータＭに通電し動作させると、電流検出抵
抗１０の両端には、通電電流に対応する電圧が発生す
る。該電圧は抵抗１１，１２により分圧され、差動増幅
器１３のオペアンプに入力される。該差動増幅器１３の
出力はダイオード１４で整流されて、その出力が平滑コ
ンデンサ１５で平滑されてオペアンプ１６の（＋）側に
入力され、該オペアンプ１６の（−）側には電源電圧が
分圧抵抗１７，１８で分圧されて得られた、基準電圧が
入力されている。The operation of the circuit shown in FIG. 1 will be described. When the fan motor M is energized and operated, a voltage corresponding to the energized current is generated across the current detection resistor 10. The voltage is divided by the resistors 11 and 12 and input to the operational amplifier of the differential amplifier 13. The output of the differential amplifier 13 is rectified by the diode 14, the output thereof is smoothed by the smoothing capacitor 15 and input to the (+) side of the operational amplifier 16, and the power supply voltage is distributed to the (-) side of the operational amplifier 16. A reference voltage obtained by dividing the voltage with the piezoresistors 17 and 18 is input.
【００１２】オペアンプ１６に入力された平滑コンデン
サ１５の電圧は、分圧抵抗１７，１８により電源電圧が
分圧された基準電圧と比較され、電流が正常値の場合は
オペアンプ１６から出力電圧が出るように前記分圧抵抗
１７，１８が設定されており、オペアンプ１６の出力に
よりトランジスタ１９に所定の電流が流れる。一方、異
常回転数検出回路においては、回転数が正常の値（閾値
以上）であると、その異常回転検出信号端子Ｓから
（＋）電圧が出力しているので、トランジスタ２２に所
定の電流が流れる。そして該トランジスタ２２のコレク
タと前記トランジスタ１９のコレクタとが接続されてい
るので、該コレクタの電位は、抵抗２０と、トランジス
タ２２とトランジスタ１９の双方の内部抵抗が並列に接
続された回路との直列接続で形成される分圧回路によ
り、電源電圧を分圧した低い値となっており、この電圧
ではトランジスタ２３への電流を遮断するので警報出力
端子Ａから警報信号が出ないことになる。The voltage of the smoothing capacitor 15 input to the operational amplifier 16 is compared with a reference voltage obtained by dividing the power supply voltage by the voltage dividing resistors 17 and 18, and when the current is a normal value, an output voltage is output from the operational amplifier 16. Thus, the voltage dividing resistors 17 and 18 are set, and a predetermined current flows through the transistor 19 by the output of the operational amplifier 16. On the other hand, in the abnormal rotation speed detection circuit, when the rotation speed is a normal value (greater than or equal to the threshold value), the (+) voltage is output from the abnormal rotation detection signal terminal S, so that a predetermined current flows to the transistor 22. Flowing. Since the collector of the transistor 22 and the collector of the transistor 19 are connected, the potential of the collector is in series with the resistor 20 and a circuit in which the internal resistances of both the transistor 22 and the transistor 19 are connected in parallel. The voltage dividing circuit formed by connection divides the power supply voltage into a low value, and at this voltage the current to the transistor 23 is cut off, so that no alarm signal is output from the alarm output terminal A.
【００１３】例えば、通電電流は変化せず正常値を保つ
た状態で、異常回転数検出回路の異常値（閾値より低
下）が検出されると、異常回転検出信号端子Ｓから電圧
は出力せず、トランジスタ２２がＯＦＦとなり、抵抗２
０とで電源電圧を分圧するトランジシタの内部抵抗はト
ランジスタ１９分のみとなり、この部分の抵抗が高くな
るのでコレクタの電位が上昇し、トランジスタ２３に電
流が流れて警報出力端子Ａから警報信号が出るようにな
る。For example, when an abnormal value of the abnormal rotation speed detection circuit (lower than a threshold value) is detected in a state where the energization current does not change and maintains a normal value, no voltage is output from the abnormal rotation detection signal terminal S. , The transistor 22 is turned off and the resistor 2
The internal resistance of the transistor that divides the power supply voltage with 0 becomes only the transistor 19 minutes, and the resistance of this part becomes high, the potential of the collector rises, current flows through the transistor 23, and an alarm signal is output from the alarm output terminal A. Like
【００１４】また別の例で、前記フアンモータが正常に
回転（閾値以上）しているときは、異常回転数検出回路
の異常回転検出信号端子Ｓから（＋）電圧が出力してお
り、通電電流の値が正常値より低くなると、電流検出抵
抗１０から差動増幅器１３への入力電圧が低下する。す
るとオペアンプ１６の入力電圧が低下して、該入力電圧
が前記分圧抵抗１７，１８により分圧された基準電圧よ
り低くなると、オペアンプ１６から出力が出なくなって
トランジスタ１９はＯＦＦとなる。一方、異常回転数検
出回路の異常回転検出信号端子Ｓから＋電圧が出力して
いるので、トランジスタ２２に電流が流れ、抵抗２０と
電源電圧を分圧するトランジスタの内部抵抗はトランジ
スタ２２分のみとなり、トランジスタ２２のコレクタ電
位が高くなってトランジスタ２３が０Ｎになり、警報出
力端子Ａから警報信号が出るようになる。In another example, when the fan motor is rotating normally (greater than a threshold value), a (+) voltage is output from the abnormal rotation detection signal terminal S of the abnormal rotation speed detection circuit, and the fan is energized. When the current value becomes lower than the normal value, the input voltage from the current detection resistor 10 to the differential amplifier 13 decreases. Then, when the input voltage of the operational amplifier 16 decreases and the input voltage becomes lower than the reference voltage divided by the voltage dividing resistors 17 and 18, no output is output from the operational amplifier 16 and the transistor 19 is turned off. On the other hand, since the + voltage is output from the abnormal rotation detection signal terminal S of the abnormal rotation speed detection circuit, a current flows through the transistor 22, and the internal resistance of the resistor 20 and the transistor for dividing the power supply voltage is only the transistor 22. The collector potential of the transistor 22 becomes high, the transistor 23 becomes 0N, and the alarm signal is output from the alarm output terminal A.
【００１５】上述２つの例での動作は、前記図３で説明
したように、異常回転数検出回路を備えたフアンモータ
２個を通風路に対し直列に配置した構成で、一方のフア
ンモータｂが故障して通電不能となり、他方のフアンモ
ータａのみで駆動しているときにフアンモータａの風で
フアンモータｂが回転させられ、この回転数が閾値以上
であると、フアンモータｂの異常回転数検出回路が異常
回転数を検出しない状況に相当するので、代わって通電
電流検出回路で電流異常を検出することで、警報信号回
路からの警報信号を得るようになっている。The operation in the above two examples is, as described in FIG. 3, a configuration in which two fan motors having an abnormal rotation speed detection circuit are arranged in series with respect to the air passage, and one fan motor b Fails and current cannot be supplied, and the fan motor b is rotated by the wind of the fan motor a when the fan motor a is driven only by the other fan motor a. If this rotation speed is equal to or higher than the threshold value, the fan motor b is abnormal. Since this corresponds to a situation in which the rotation speed detection circuit does not detect an abnormal rotation speed, an alarm signal from the alarm signal circuit is obtained by detecting a current abnormality by the energization current detection circuit instead.
【００１６】図１では、本発明に成る異常回転数検出回
路を備えるフアンモータの駆動回路を、通常部品を接続
した構成として示しているが、異常回転数検出回路を含
めて半導体集積回路、あるいはモス集積回路にて構成す
ることにより容積を縮減し信頼度を向上させることもで
きる。In FIG. 1, the fan motor drive circuit including the abnormal rotation speed detection circuit according to the present invention is shown as a structure in which normal parts are connected. However, a semiconductor integrated circuit including the abnormal rotation speed detection circuit, or It is also possible to reduce the volume and improve reliability by using a moss integrated circuit.
【００１７】[0017]
【発明の効果】本発明になるフアンモータは上述のよう
に構成されているから、通電電流に異常があっても、ま
た回転数に異常があっても、警報信号を出すことが出
来、複数のフアンモータを共通の通風路内に直列あるい
は並列にして実装・配置する構成においても、故障した
フアンモータが他のフアンモータで強制回転させられて
いる状態であっても、故障の発生を検出できる効果があ
る。Since the fan motor according to the present invention is configured as described above, an alarm signal can be issued even if the energization current is abnormal or the rotation speed is abnormal. Even if the fan motors are mounted and arranged in series or in parallel in the common ventilation passage, the failure occurrence is detected even if the failed fan motor is forcibly rotated by another fan motor. There is an effect that can be done.
【図１】本発明に成る例の異常回転数検出回路を備える
フアンモータの回路図である。FIG. 1 is a circuit diagram of a fan motor including an abnormal rotation speed detection circuit according to an example of the present invention.
【図２】従来技術に成る例の異常回転数検出回路を備え
るフアンモータの駆動回路ブロック図である。FIG. 2 is a drive circuit block diagram of a fan motor including an abnormal rotation speed detection circuit according to an example of a conventional technique.
【図３】本発明に係る異常回転数検出回路を備えるフア
ンモータ２個を、通風路に対し直列配置した状態を示す
説明図である。FIG. 3 is an explanatory diagram showing a state in which two fan motors provided with the abnormal rotation speed detection circuit according to the present invention are arranged in series with respect to a ventilation path.
１ ホール素子 ２ 通電制御信号発生回路 ３ 回転数指令回路 ４ 通電用スイッチング回路 ５ フアンモータの固定子巻線 ６ 回転数検出回路 ７ 比較回路 ８ 閾値発生回路 ９ 警報信号端子 １０ 電流検出抵抗 １１、１２ 分圧抵抗 １３ 差動増幅器 １４ ダイオード １５ 平滑コンデンサ １６ オペアンプ １７、１８ 分圧抵抗 １９、２２、２３ トランジスタ ２０、２１ 抵抗 Ｍ フアンモータ Ｖ 電源端子 Ｓ 異常回転検出信号端子 1 Hall element 2 Energization control signal generation circuit 3 rotation speed command circuit 4 Switching circuit for energization 5 Fan motor stator winding 6 Rotation speed detection circuit 7 Comparison circuit 8 threshold generation circuit 9 Alarm signal terminal 10 Current detection resistor 11, 12 partial pressure resistance 13 Differential amplifier 14 Diode 15 Smoothing capacitor 16 operational amplifier 17, 18 division resistance 19, 22, 23 transistors 20,21 resistance M fan motor V power supply terminal S Abnormal rotation detection signal terminal
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０２Ｐ 6/12 Ｈ０２Ｐ 6/02 ３２１Ｐ Ｆターム(参考） 3H021 AA01 AA08 BA21 CA04 EA07 EA20 3H045 AA06 AA09 AA12 AA26 AA31 BA41 CA09 EA17 EA26 EA50 5H560 AA01 BB12 DA02 DB00 DC12 RR10 SS01 XA04 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) H02P 6/12 H02P 6/02 321P F term (reference) 3H021 AA01 AA08 BA21 CA04 EA07 EA20 3H045 AA06 AA09 AA12 AA26 AA31 BA41 CA09 EA17 EA26 EA50 5H560 AA01 BB12 DA02 DB00 DC12 RR10 SS01 XA04
Claims (3)
と空隙を介して対向し回転自在に軸支され、永久磁石と
フアンとを備えた回転子と、前記永久磁石の磁極位置を
検出するためのホール素子と、該ホール素子の出力電圧
により前記固定子巻線への通電を制御する通電制御回路
を有し、該通電制御回路が、回転速度を指令する回転数
指令回路と、回転数検出器と、該回転数検出器の出力と
予め定められた回転数閾値とを比較するための比較回路
を備えると共に、回転数が所定の閾値以下となったとき
に異常回転数検出の信号を発する異常回転数検出装置を
も備える可変速度フアンモータにおいて、該フアンモー
タの通電電流を検出する通電電流検出回路を備え、該通
電電流検出回路の異常信号もしくは前記比較回路による
回転数低下の異常判定信号の、何れかの出力により異常
回転数検出信号が出るように構成されていること、を特
徴とする異常回転数検出回路を備えるフアンモータ。1. A stator provided with a stator winding, a rotor provided with a permanent magnet and a fan, which is rotatably supported by the stator so as to face the stator via a gap, and a magnetic pole of the permanent magnet. A Hall element for detecting a position, and an energization control circuit for controlling energization to the stator winding by an output voltage of the Hall element, the energization control circuit being a rotation speed command circuit for instructing a rotation speed. And a rotation speed detector and a comparison circuit for comparing the output of the rotation speed detector with a predetermined rotation speed threshold value, and the abnormal rotation speed when the rotation speed falls below a predetermined threshold value. In a variable speed fan motor that also includes an abnormal rotation speed detection device that outputs a detection signal, a conduction current detection circuit that detects a conduction current of the fan motor is provided, and an abnormality signal of the conduction current detection circuit or the rotation speed by the comparison circuit Deterioration abnormal A fan motor having an abnormal rotation speed detection circuit, characterized in that an abnormal rotation speed detection signal is output by either output of a constant signal.
路とが、半導体集積回路により構成されていること、を
特徴とする請求項１に記載の異常回転数検出回路を備え
るフアンモータ。2. A fan motor having an abnormal rotation speed detection circuit according to claim 1, wherein the abnormal rotation speed detection circuit and the energization current detection circuit are constituted by a semiconductor integrated circuit.
路とが、モス集積回路により構成されていること、を特
徴とする請求項１に記載の異常回転数検出回路を備える
フアンモータ。3. A fan motor having an abnormal rotation speed detection circuit according to claim 1, wherein the abnormal rotation speed detection circuit and the energization current detection circuit are constituted by a MOS integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001299107A JP2003111478A (en) | 2001-09-28 | 2001-09-28 | Fan motor provided with abnormal-revolution detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001299107A JP2003111478A (en) | 2001-09-28 | 2001-09-28 | Fan motor provided with abnormal-revolution detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003111478A true JP2003111478A (en) | 2003-04-11 |
Family
ID=19119908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001299107A Pending JP2003111478A (en) | 2001-09-28 | 2001-09-28 | Fan motor provided with abnormal-revolution detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003111478A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007224903A (en) * | 2006-02-24 | 2007-09-06 | Taida Electronic Ind Co Ltd | Fan system |
| JP2008208806A (en) * | 2007-02-27 | 2008-09-11 | Nec Corp | Fan failure diagnosis device, method and program |
| JP2010073995A (en) * | 2008-09-19 | 2010-04-02 | Nec Corp | Fault diagnosis system of cooling fan, fault diagnosis device, fault diagnosis method, fault diagnosis program, and cooling device |
| WO2011006411A1 (en) * | 2009-07-13 | 2011-01-20 | 中兴通讯股份有限公司 | Dc fan fault detecting device and method with alarm |
| JP2011052583A (en) * | 2009-09-01 | 2011-03-17 | Mitsubishi Electric Corp | Blowing device |
| JP2013137000A (en) * | 2011-12-28 | 2013-07-11 | Noritz Corp | Water heater and control device for fan motor |
| CN105822583A (en) * | 2016-04-29 | 2016-08-03 | 成都瑞阳机械有限公司 | High-recognition safe type centrifugal fan intelligent control system |
| CN114060298A (en) * | 2020-08-04 | 2022-02-18 | 广东美的环境电器制造有限公司 | Control circuit and method of electric fan |
| CN116857216A (en) * | 2023-07-05 | 2023-10-10 | 安徽尚特杰电力技术有限公司 | Multi-fan fault detection circuit and method |
| CN116857216B (en) * | 2023-07-05 | 2024-04-26 | 安徽尚特杰电力技术有限公司 | Multi-fan fault detection circuit and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001193688A (en) * | 2000-01-17 | 2001-07-17 | Mitsubishi Electric Corp | Driving device for air blowing device and for fluid pressure feeding device |
-
2001
- 2001-09-28 JP JP2001299107A patent/JP2003111478A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001193688A (en) * | 2000-01-17 | 2001-07-17 | Mitsubishi Electric Corp | Driving device for air blowing device and for fluid pressure feeding device |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007224903A (en) * | 2006-02-24 | 2007-09-06 | Taida Electronic Ind Co Ltd | Fan system |
| JP2008208806A (en) * | 2007-02-27 | 2008-09-11 | Nec Corp | Fan failure diagnosis device, method and program |
| JP2010073995A (en) * | 2008-09-19 | 2010-04-02 | Nec Corp | Fault diagnosis system of cooling fan, fault diagnosis device, fault diagnosis method, fault diagnosis program, and cooling device |
| WO2011006411A1 (en) * | 2009-07-13 | 2011-01-20 | 中兴通讯股份有限公司 | Dc fan fault detecting device and method with alarm |
| JP2011052583A (en) * | 2009-09-01 | 2011-03-17 | Mitsubishi Electric Corp | Blowing device |
| JP2013137000A (en) * | 2011-12-28 | 2013-07-11 | Noritz Corp | Water heater and control device for fan motor |
| CN105822583A (en) * | 2016-04-29 | 2016-08-03 | 成都瑞阳机械有限公司 | High-recognition safe type centrifugal fan intelligent control system |
| CN114060298A (en) * | 2020-08-04 | 2022-02-18 | 广东美的环境电器制造有限公司 | Control circuit and method of electric fan |
| CN114060298B (en) * | 2020-08-04 | 2023-11-17 | 广东美的环境电器制造有限公司 | Control circuit and method of electric fan |
| CN116857216A (en) * | 2023-07-05 | 2023-10-10 | 安徽尚特杰电力技术有限公司 | Multi-fan fault detection circuit and method |
| CN116857216B (en) * | 2023-07-05 | 2024-04-26 | 安徽尚特杰电力技术有限公司 | Multi-fan fault detection circuit and method |
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