JP4711802B2 - 電動ファンの駆動装置 - Google Patents
電動ファンの駆動装置 Download PDFInfo
- Publication number
- JP4711802B2 JP4711802B2 JP2005318295A JP2005318295A JP4711802B2 JP 4711802 B2 JP4711802 B2 JP 4711802B2 JP 2005318295 A JP2005318295 A JP 2005318295A JP 2005318295 A JP2005318295 A JP 2005318295A JP 4711802 B2 JP4711802 B2 JP 4711802B2
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- Prior art keywords
- noise
- electric fan
- control
- sound
- signal
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- 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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- Structures Of Non-Positive Displacement Pumps (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Description
12 電動ファン
16 変調回路
24 マイクロホン
26 制御回路
Claims (3)
- 騒音源から発生する騒音に対し制御音を干渉させることによって該騒音を低減する能動消音装置において、
上記騒音を検出する騒音検出手段と、
上記騒音検出手段による検出結果に基づいて上記騒音を打ち消すべく騒音制御信号を生成する騒音制御手段と、
上記騒音制御信号に従う上記制御音を生成して上記騒音に干渉させる2次音源手段と、
を具備し、
上記2次音源手段は、上記騒音が存在する空間に設けられた電動ファンと、該電動ファンを駆動するための駆動信号を上記騒音制御信号によって変調することにより該駆動信号に該騒音制御信号を重畳させる変調手段と、を備え、該変調手段による変調後の該駆動信号に含まれる該騒音制御信号に従って該電動ファンの回転速度を変化させることで該電動ファンから上記制御音を発生させ、さらに、
上記騒音源は上記電動ファン自体を含むこと、
を特徴とする、能動消音装置。 - 上記電動ファンは上記空間の通気を行うように設けられた、請求項1に記載の能動消音装置。
- 上記制御音は上記騒音と実質的に等大かつ逆位相の音である、
請求項1または2に記載の能動消音装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005318295A JP4711802B2 (ja) | 2005-11-01 | 2005-11-01 | 電動ファンの駆動装置 |
Applications Claiming Priority (1)
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JP2005318295A JP4711802B2 (ja) | 2005-11-01 | 2005-11-01 | 電動ファンの駆動装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007126983A JP2007126983A (ja) | 2007-05-24 |
JP4711802B2 true JP4711802B2 (ja) | 2011-06-29 |
Family
ID=38149839
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JP2005318295A Active JP4711802B2 (ja) | 2005-11-01 | 2005-11-01 | 電動ファンの駆動装置 |
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JP (1) | JP4711802B2 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013506075A (ja) * | 2009-09-29 | 2013-02-21 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 音響冷却システムのためのノイズ低減 |
JP2017227676A (ja) * | 2016-06-20 | 2017-12-28 | 株式会社リコー | 画像投影装置および画像投影装置の制御方法 |
TWI645116B (zh) * | 2017-09-20 | 2018-12-21 | 中原大學 | 風扇噪音控制系統 |
CN109058176A (zh) * | 2018-08-01 | 2018-12-21 | 济南浪潮高新科技投资发展有限公司 | 一种具有主动降噪功能的散热风扇 |
CN114704497B (zh) * | 2022-03-14 | 2024-08-13 | 桂林智神信息技术股份有限公司 | 一种散热结构及其的自相关相同步控制的主动降噪方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5462509A (en) * | 1977-10-27 | 1979-05-19 | Agency Of Ind Science & Technol | Blower-noise reducing method by phase control |
JPH05157094A (ja) * | 1991-12-06 | 1993-06-22 | Toshiba Corp | Oa機器の冷却装置 |
JP2004112296A (ja) * | 2002-09-18 | 2004-04-08 | Canon Inc | スピーカシステム、能動式室内低音残響制御方式 |
JP2005076585A (ja) * | 2003-09-02 | 2005-03-24 | Ebara Densan Ltd | 送風装置 |
JP2005269522A (ja) * | 2004-03-22 | 2005-09-29 | Dimagic:Kk | 直接変調型気流スピーカ及びスピーカユニット |
-
2005
- 2005-11-01 JP JP2005318295A patent/JP4711802B2/ja active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5462509A (en) * | 1977-10-27 | 1979-05-19 | Agency Of Ind Science & Technol | Blower-noise reducing method by phase control |
JPH05157094A (ja) * | 1991-12-06 | 1993-06-22 | Toshiba Corp | Oa機器の冷却装置 |
JP2004112296A (ja) * | 2002-09-18 | 2004-04-08 | Canon Inc | スピーカシステム、能動式室内低音残響制御方式 |
JP2005076585A (ja) * | 2003-09-02 | 2005-03-24 | Ebara Densan Ltd | 送風装置 |
JP2005269522A (ja) * | 2004-03-22 | 2005-09-29 | Dimagic:Kk | 直接変調型気流スピーカ及びスピーカユニット |
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JP2007126983A (ja) | 2007-05-24 |
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