JP4215980B2

JP4215980B2 - Fan motor and ventilator equipped with the same

Info

Publication number: JP4215980B2
Application number: JP2001400158A
Authority: JP
Inventors: 昌亨高田
Original assignee: Panasonic Ecology Systems Co Ltd
Current assignee: Panasonic Ecology Systems Co Ltd
Priority date: 2001-12-28
Filing date: 2001-12-28
Publication date: 2009-01-28
Anticipated expiration: 2021-12-28
Also published as: JP2003201991A

Description

【０００１】
【発明の属する技術分野】
本発明は、主にレンジフードや天井埋め込み型等の排気用および給気用の換気装置に搭載するファンモータ、およびそのファンモータを搭載した換気装置に関するものである。
【０００２】
【従来の技術】
近年、レンジフードや天井埋め込み型の換気装置などにおいては、高効率化による消費電力の削減をした上で、ダクト配管形態による圧力損失や外風圧、フィルタ等の目詰まりによる圧力損失の変化の影響を受けることなく、調理の状態や居室の状況に応じて最適な風量で換気ができるような制御性の良いファンモータが求められている。また、２４時間常時換気の増加にともない、静音化および低消費電力化したファンモータが求められている。
【０００３】
従来、この種のファンモータの一例として特開平５−１４６１８９号公報に示されるように、ファンモータの運転回転数を検出する回転数検出手段とファンモータへの印加電圧を検出する印加電圧検出手段と、指示風量に対して一定運転するために必要な規定回転数を複数の印加電圧に対応して記憶する規定回転数記憶手段を設け、印加電圧検出手段によって検出された印加電圧時に必要な規定回転数を規定回転数記憶手段から検索し、回転数検出手段によって検出した運転回転数と検索した規定回転数が一致するよう印加電圧を昇圧あるいは降圧するファンモータが開示されている。しかしながら、２４時間常時換気の増加にともない、高効率化のために、磁石回転子の磁極数も４極から６極，８極へと多極化してきている。そして、２５Ｗを越えるような出力の高いモータにおいては、トルクリップル・トルク変化率を小さくして、騒音・振動の発生を抑制するために、ＤＣモータの電機子巻線への通電を１２０度から１３０度へ、１３０度から１４０度へ、１４０度から１５０度へと導通角を拡げた通電制御も必要になってきており、そのためには磁石回転子の磁極位置を誘起電圧のゼロクロスを検出して行う方法ではなく、ホールＩＣなどを用いて磁石回転子の磁極位置を検出し通電相の切替を行う方式を採用している。このようなＤＣモータの場合は、プリント基板上にホールＩＣを実装，はんだ付けし、磁石回転子からある程度の空隙を持たせ、磁石の洩れ磁束をホールＩＣにて検知できるように、プリント基板をＤＣモータ内部の固定子などに取り付けたＤＣモータの構造である。また、２５Ｗ以下の出力のモータにおいては、制御回路の小型化を図るために、モータ駆動回路をモータ内部に内蔵したＤＣモータを採用する方式が増えてきている。このような場合は、プリント基板上にホールＩＣと、このホールＩＣの出力信号に基づいて電機子巻線への通電相を切り替えるロジック回路とスイッチング素子を内蔵した汎用の駆動ＩＣなどを実装・はんだ付けし、磁石回転子からある程度の空隙を持たせ、磁石の洩れ磁束をホールＩＣにて検知できるように、プリント基板をＤＣモータ内部の固定子などに取り付けたＤＣモータの構造である。
【０００４】
【発明が解決しようとする課題】
このような従来のファンモータによれば、ＤＣモータの電機子巻線への通電相の切替をホールＩＣの信号出力に基づいて行っているが、プリント基板へのホールＩＣの実装は実装機のマウント精度が高いものでも、０．２ｍｍ〜０．３ｍｍ（平面上で）ずれてしまう。また、実装する際の接着剤の塗布量にもばらつきがあるので、磁石とホールＩＣとの空隙がばらつき、ホールＩＣの信号変化に差異が生じる。さらには、ホールＩＣのセンサ感度も±２０ｍＴのばらつきがあり、このようなばらつきを総合すると、磁石外径５０ｍｍ，磁石極数８極のＤＣモータの場合、誘起電圧位相に対する通電位相が電気角で±１０度程度ばらつくこととなり、同一のトルクと回転数を出力するために必要な印加電圧、電流が通電位相のばらつきにより大きく異なってくる。一般的に、転流タイミングが遅れ、通電位相が遅れ位相となる場合は、同一のトルクと回転数を出力するための印加電圧も電流も高くなり、逆に通電位相が進み位相の場合は、印加電圧も電流も低くなる。ここで、図８に従来のファンモータの通電位相が進み位相のモータと、遅れ位相のモータにおける同一指示風量・同一印加電圧時の、風量−静圧と風量−回転数特性を示す。図に示すように、同一指示風量・同一印加電圧時において通電位相が遅れ位相のモータの方が、進み位相のモータよりも回転数が高くなる。したがって、指示風量に対するＤＣモータへの印加電圧と規定回転数のテーブルが、通電位相の違いにより異なるため、通電位相が中心となるＤＣモータにてテーブルを作成した時、通電位相が進み位相の場合は回転数を規定回転数と同一にするために、ＤＣモータへの印加電圧を昇圧していくので、風量が大幅に増加し、逆に通電位相が遅れ位相の場合は回転数を規定回転数と同一にするために、ＤＣモータへの印加電圧を降圧していくので、風量が大幅に減少するという課題があった。
【０００５】
また、風量一定制御を実現するためには、ホールＩＣの位置を確認した上で個別にテーブルを作成するか、ＤＣモータを選別して搭載する必要があり、汎用性がないという課題があった。
【０００６】
本発明は、このような従来の課題を解決するものであり、ホールＩＣの信号出力に基づいて電機子巻線への通電切替を行うＤＣモータを搭載したファンモータであっても、風量を指示風量に対して略一定に制御できるファンモータおよびそれを搭載した換気装置を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明のファンモータは上記目的を達成するために、ＤＣモータを搭載したファンモータであって、前記ＤＣモータの磁石回転子の磁極位置を検出する位置検出手段と、この位置検出手段の信号に基づき、前記ＤＣモータの複数の電機子巻線に対する通電を制御する通電制御手段と、前記位置検出手段の信号出力から前記ＤＣモータの運転回転数を検出する回転数検出手段と、前記ファンモータの運転風量を指示する風量指示手段と、前記ＤＣモータへの印加電圧を検知する印加電圧検出手段と、この印加電圧検出手段によって検知された印加電圧は、前記風量指示手段によって指示された各風量毎に、前記ＤＣモータへの複数の印加電圧範囲に分類判別する印加電圧範囲判別手段と、前記風量指示手段によって指示された各風量で略一定運転するために前記ＤＣモータの必要な回転数を、各風量毎、複数の印加電圧範囲毎に記憶する規定回転数記憶手段とを備え、前記回転数検出手段によって検出された運転回転数と前記風量指示手段によって指示された風量と前記印加電圧範囲判別手段によって検知された印加電圧範囲に対応した規定回転数を前記規定回転数記憶手段から選定し、この選定した規定回転数と検出した運転回転数とが同一になるよう前記ＤＣモータへの印加電圧を制御する印加電圧制御手段を配してなるファンモータの構成としたものである。
【０００８】
本発明によれば、ホールＩＣ等の磁極検出素子を用いて磁石回転子の磁極位置を検知し、通電相を切り替えるＤＣモータを搭載しても、指示風量に対して複数の印加電圧範囲を設定し、ファンモータにかかる静圧を概略判断して、段階的に複数段回転数一定で運転するので、通電位相が変化しても関係なく指示風量に対して略一定で制御できるファンモータが得られる。
【０００９】
また他の手段は、ファンモータの設置される雰囲気温度を検出する雰囲気温度検出手段と、前記ファンモータの運転風量を指示する風量指示手段と、前記ＤＣモータへの印加電圧を検知する印加電圧検出手段と、この印加電圧検出手段によって検知された印加電圧は、前記風量指示手段によって指示された各風量毎に、前記ＤＣモータへの複数の印加電圧範囲に分類判別する印加電圧範囲判別手段と、前記風量指示手段によって指示された各風量で略一定運転するために基準温度時におけるＤＣモータの必要な回転数を、各風量毎、複数の印加電圧範囲毎に記憶する基準温度時規定回転数記憶手段と、前記雰囲気温度検出手段によって検出された温度と基準温度との差から、前記基準温度時規定回転数記憶手段より選定した規定回転数を補正する規定回転数補正手段とを備え、この規定回転数補正手段によって補正した規定回転数と検出した運転回転数とが同一になるよう前記ＤＣモータへの印加電圧を制御する印加電圧制御手段を配してなるファンモータの構成としたものである。
【００１０】
本発明によれば、雰囲気温度の変化により、磁石の磁束量や、空気比重量が変化しても、規定回転数を補正するので、指示風量に対して略一定で制御できるファンモータが得られる。
【００１１】
また他の手段は、ＤＣモータを搭載したファンモータであって、前記ＤＣモータの磁石回転子の磁極位置を検出する位置検出手段と、この位置検出手段の信号に基づき、前記ＤＣモータの複数の電機子巻線に対する通電を制御する通電制御手段と、前記ＤＣモータに流れる電流を検知する電流検知手段と、前記位置検出手段の信号出力から前記ＤＣモータの運転回転数を検出する回転数検出手段と、前記ファンモータの運転風量を指示する風量指示手段と、この風量指示手段によって指示された各風量毎に、前記ＤＣモータへの複数の電流範囲を分類判別する電流範囲判別手段と、前記風量指示手段によって指示された各風量で略一定運転するために前記ＤＣモータの必要な回転数を、各風量毎、複数の電流範囲毎に記憶する規定回転数記憶手段とを備え、前記回転数検出手段によって検出された運転回転数と前記風量指示手段によって指示された風量と前記電流範囲判別手段によって検知された電流範囲に対応した規定回転数を前記規定回転数記憶手段から選定し、この選定した規定回転数と検出した運転回転数とが同一になるよう前記ＤＣモータへの印加電圧を制御する印加電圧制御手段を配してなるファンモータの構成としたものである。
【００１２】
本発明によれば、高圧ＰＷＭ駆動であって、ホールＩＣ等の磁極検出素子を用いて磁石回転子の磁極位置を検知し、通電相を切り替えるＤＣモータを搭載しても、指示風量に対して複数の電流範囲を設定し、ファンモータにかかる静圧を概略判断して、段階的に複数段回転数一定で運転するので、通電位相が変化しても関係なく指示風量に対して略一定で制御できるファンモータが得られる。
【００１３】
また他の手段は、ファンモータの設置される雰囲気温度を検出する雰囲気温度検出手段と、前記ファンモータの運転風量を指示する風量指示手段と、この風量指示手段によって指示された各風量毎に、前記ＤＣモータへの複数の電流範囲を分類判別する電流範囲判別手段と、前記風量指示手段によって指示された各風量で略一定運転するために基準温度時におけるＤＣモータの必要な回転数を、各風量毎、複数の電流範囲毎に記憶する基準温度時規定回転数記憶手段と、前記雰囲気温度検出手段によって検出された温度と基準温度との差から、前記基準温度時規定回転数記憶手段より選定した規定回転数を補正する規定回転数補正手段とを備え、この規定回転数補正手段によって補正した規定回転数と検出した運転回転数とが同一になるよう前記ＤＣモータへの印加電圧を制御する電圧制御手段を配してなるファンモータの構成としたものである。
【００１４】
本発明によれば、雰囲気温度の変化により、磁石の磁束量や、空気比重量が変化しても、規定回転数を補正するので、指示風量に対して略一定で制御できるファンモータが得られる。
【００１５】
【発明の実施の形態】
本発明は、風量指示手段によって指示された各風量毎に、ＤＣモータへの複数の印加電圧範囲を分類判別する印加電圧範囲判別手段と、前記風量指示手段によって指示された各風量で略一定運転するために前記ＤＣモータの必要な回転数を、各風量毎、複数の印加電圧範囲毎に記憶する規定回転数記憶手段とを備え、前記回転数検出手段によって検出された運転回転数と前記風量指示手段によって指示された風量と前記印加電圧範囲判別手段によって検知された印加電圧範囲に対応した規定回転数を前記規定回転数記憶手段から選定し、この選定した規定回転数と検出した運転回転数とが同一になるよう前記ＤＣモータへの印加電圧を制御する構成としたものであり、複数の印加電圧範囲に応じて、ファンモータにかかる静圧を概略判断して、段階的に回転数一定で運転するという作用を有する。
【００１６】
また、ファンモータの設置される雰囲気温度を検出する雰囲気温度検出手段を設け、この雰囲気温度検出手段によって検出された温度と基準温度との差から、基準温度時規定回転数記憶手段より選定した規定回転数を補正する規定回転数補正手段とを備え、この規定回転数補正手段によって補正した規定回転数と検出した運転回転数とが同一になるよう前記ＤＣモータへの印加電圧を制御する印加電圧制御手段を配してなるファンモータの構成としたものであり、雰囲気温度の変化により、磁石の磁束量や、空気比重量が変化しても、規定回転数を電圧範囲に応じて補正するという作用を有する。
【００１７】
また、ＤＣモータへの複数の電流範囲を分類判別する電流範囲判別手段と、風量指示手段によって指示された各風量で略一定運転するために前記ＤＣモータの必要な回転数を、各風量毎、複数の電流範囲毎に記憶する規定回転数記憶手段とを備え、検出された運転回転数と前記風量指示手段によって指示された風量と前記電流範囲判別手段によって検知された電流範囲に対応した規定回転数を前記規定回転数記憶手段から選定し、この選定した規定回転数と検出した運転回転数とが同一になるよう前記ＤＣモータへの印加電圧を制御する印加電圧制御手段を配してなるファンモータの構成としたものであり、指示風量に対して複数の電流範囲に応じて、ファンモータにかかる静圧を概略判断して、段階的に回転数一定で運転するという作用を有する。
【００１８】
また、ファンモータの設置される雰囲気温度を検出する雰囲気温度検出手段を設け、この雰囲気温度検出手段によって検出された温度と基準温度との差から、基準温度時規定回転数記憶手段より選定した規定回転数を補正する規定回転数補正手段とを備え、この規定回転数補正手段によって補正した規定回転数と検出した運転回転数とが同一になるよう前記ＤＣモータへの印加電圧を制御する印加電圧制御手段を配してなるファンモータの構成としたものであり、雰囲気温度の変化により、磁石の磁束量や、空気比重量が変化しても、規定回転数を電流範囲に応じて補正するという作用を有する。
【００１９】
以下、本発明の実施例について図１〜図７を参照しながら説明する。
【００２０】
【実施例】
（実施例１）
図１〜図５に示すように、１はＤＣモータ２を搭載した遠心型のファンモータで、１９はファンモータ１を内蔵した換気装置である。ファンモータ１の吐出口１６はダクト１４を介して建物の壁１５を貫通してファンモータ１によって吸い込まれた、たばこの煙や調理による廃ガス、油煙によって汚染した室内空気を屋外に排気する。４はサーミスタなどの雰囲気温度検出手段で、換気する空気の温度を検出する。ＤＣモータ２は磁石回転子３の磁極位置を検出するホールＩＣ５と、駆動ロジック回路７ａとスイッチング素子群７ｂよりなる通電制御手段６等を搭載した駆動ＩＣ（図示せず）や、コンデンサ等の電子部品を実装したプリント基板（図示せず）を内蔵した構造である。駆動ロジック回路７ａはホールＩＣ５の信号出力を基に、スイッチング素子群７ｂをＯＮ・ＯＦＦ制御して電機子巻線１７への通電切り替えを制御する。１３は弱、中、強などのファンモータ１の運転風量を指示する風量指示手段で、９はホールＩＣ５の信号出力から運転回転数を検知する運転回転数検出手段で、１８はＤＣモータ２への印加電圧を検知する印加電圧検出手段である。１０は印加電圧検出手段１８によって検出された印加電圧が風量指示手段１３にて指示された各風量毎にＤＣモータ２への複数の印加電圧範囲を分類判別する印加電圧範囲判別手段であり、１２は基準温度時の規定回転数記憶手段で、換気装置１９が換気する空気の温度が所定の雰囲気温度において、風量指示手段１３によって指示された各風量で略一定運転するためにＤＣモータ２の必要な回転数を各風量毎、複数の印加電圧範囲毎に規定回転数として記憶している。８は規定回転数補正手段で、雰囲気温度検出手段４が検知した温度と基準の所定温度を比較し、その温度差に応じて規定回転数を補正する。１１は印加電圧制御手段で、規定回転数記憶手段１２から指示風量と印加電圧範囲に対応した規定回転数を選定し、選定した規定回転数を規定回転数補正手段８が補正し、補正した規定回転数と運転回転数が同一になるようにＤＣモータ２への印加電圧を制御する構成である。そして、図５には雰囲気温度が高温の場合と低温の場合における同一指示風量・同一印加電圧時の、風量−静圧と風量−回転数特性を示す。図に示すように、同一指示風量・同一印加電圧時において雰囲気温度が高温の方が、雰囲気温度が低温となるよりも回転数が高くなる。したがって、雰囲気温度が基準温度よりも高温の場合は回転数を規定回転数と同一にするために、ＤＣモータへの印加電圧を昇圧していくので、風量が大幅に増加し、逆に雰囲気温度が基準温度よりも低温の場合は回転数を規定回転数と同一にするために、ＤＣモータへの印加電圧を降圧していくので、風量が大幅に減少することとなるので、規定回転数補正手段８は雰囲気温度検出手段４が検知した雰囲気温度が基準の所定温度よりも高い場合は、規定回転数をプラス側に補正し、逆に検知した雰囲気温度が基準の所定温度よりも低い場合は、規定回転数をマイナス側に補正する。
【００２１】
このような本発明のファンモータ１によれば、風量指示手段１３によって指示された風量と、この指示風量に応じて範囲分けされた印加電圧範囲に対応して、ファンモータ１にかかる静圧を概略判断して、段階的に規定された回転数で一定に運転制御するので、ホールＩＣ等の磁極検出素子の基板への実装位置がずれるなどの影響により、通電位相が変化しても指示風量に対して略一定で制御できるファンモータおよび換気装置が得られる。
【００２２】
また、換気する空気の温度を検出する雰囲気温度検出手段２０を設け、検出された雰囲気温度と基準の所定温度とを比較し、その温度差から段階的に規定された回転数を補正する規定回転数補正手段２１を備えることにより、雰囲気温度の変化により、電機子巻線の抵抗や、磁石の磁束量や、空気比重量が変化しても指示風量に対して略一定で制御できるファンモータおよび換気装置が得られる。
【００２３】
なお、クリーンルームのように、ほぼ恒温恒湿の環境下に設置されるファンモータや換気装置においては、雰囲気温度を検出して、規定回転数を補正する手段を設けなくても良く、指示風量に対して略一定で運転するという作用効果に差異を生じない。
【００２４】
また、実施例１では、ＤＣモータ２は磁極位置を検出するホールＩＣ５を内蔵した構成としたが、誘起電圧などから磁極位置を検出するセンサレス駆動方式のＤＣモータの構成としても良く、その作用効果に差異を生じない。
【００２５】
また、印加電圧の範囲設定はファンモータおよび換気装置に要求される風量の精度に応じて、印加電圧範囲の設定数等を決定すれば良い。
【００２６】
また、実施例１では、雰囲気温度と基準温度の差から、規定回転数記憶手段１２から検索した回転数を直接加・減して規定回転数を補正する制御方法としたが、電圧範囲をシフトして、検索する規定回転数を補正する方法としても良く、その作用効果に差異を生じない。
【００２７】
また、ＰＷＭ駆動方式の場合は、整流平滑後の波高値を検知し、検知した波高値にデューティを掛け合わせた値を電圧として制御すれば良く、その作用効果に差異を生じない。また、波高値がばらつかない場合は、デューティをそのまま電圧として制御すれば良い。
【００２８】
（実施例２）
図６および図７に示すように、２６はＤＣモータ２を搭載した遠心型のファンモータで、２７はファンモータ２６を内蔵した換気装置である。ファンモータ２６の吐出口１６はダクト１４に接続されている。ダクト１４は建物の壁１５を貫通してファンモータ１によって吸い込まれた、たばこの煙や調理による廃ガス、油煙によって汚染した室内空気を屋外に排気する。２０は雰囲気温度検出手段で、換気する空気の温度を検出する。ＤＣモータ２は磁石回転子３の磁極位置を検出するホールＩＣ５と、駆動ロジック回路７ａとスイッチング素子群７ｂよりなる通電制御手段６等を搭載した駆動ＩＣ（図示せず）や、コンデンサ等の電子部品を実装したプリント基板（図示せず）を内蔵した構造である。駆動ロジック回路７ａはホールＩＣ５の信号出力を基に、スイッチング素子群７ｂをＯＮ・ＯＦＦ制御して電機子巻線１７への通電切り替えを制御する。１３は弱、中、強などのファンモータ２６の運転風量を指示する風量指示手段で、９はホールＩＣ５の信号出力から運転回転数を検知する運転回転数検出手段で、２２はＤＣモータ２の駆動電流を検知する電流検出手段である。２３は電流検出手段２２によって検出された電流が風量指示手段１３にて指示された各風量毎にＤＣモータ２への複数の電流範囲を分類判別する電流範囲判別手段であり、２４は基準温度時規定回転数記憶手段で、換気装置１９が換気する空気の温度が所定の雰囲気温度において、風量指示手段１３によって指示された各風量で略一定運転するためにＤＣモータ２の必要な回転数を各風量毎、複数の電流範囲毎に規定回転数として記憶している。２５は規定回転数補正手段で、雰囲気温度検出手段２０が検知した温度と基準の所定温度を比較し、検知した温度が基準の温度よりも高い場合は、規定回転数をプラス側に補正し、逆に検知した温度が基準の温度よりも低い場合は、規定回転数をマイナス側に補正する。１１は印加電圧制御手段で、規定回転数記憶手段２４から指示風量と電流範囲に対応した規定回転数を選定し、選定した規定回転数を規定回転数補正手段２５が補正し、補正した規定回転数と運転回転数が同一になるようにＤＣモータ２への印加電圧を制御する構成である。
【００２９】
このような本発明のファンモータ２６によれば、風量指示手段１３によって指示された風量と、この指示風量に応じて範囲分けされた電流範囲に対応して、段階的に規定された回転数で一定に運転制御するので、ホールＩＣ等の磁極検出素子の基板への実装位置がずれるなどの影響により、通電位相が変化しても指示風量に対して略一定で制御できるファンモータおよび換気装置が得られる。
【００３０】
また、換気する空気の温度を検出する雰囲気温度検出手段２０を設け、検出された雰囲気温度と基準の所定温度とを比較し、その温度差から段階的に規定された回転数を補正する規定回転数補正手段２１を備えることにより、雰囲気温度の変化により、電機子巻線の抵抗や、磁石の磁束量や、空気比重量が変化しても指示風量に対して略一定で制御できるファンモータおよび換気装置が得られる。
【００３１】
なお、クリーンルームのように、ほぼ恒温恒湿の環境下に設置されるファンモータや換気装置においては、雰囲気温度を検出して、規定回転数を補正する手段を設けなくても良く、指示風量に対して略一定で運転するという作用効果に差異を生じない。
【００３２】
また、実施例２では、ＤＣモータ２は磁極位置を検出するホールＩＣ５を内蔵した構成としたが、誘起電圧などから磁極位置を検出するセンサレス駆動方式のＤＣモータの構成としても良く、その作用効果に差異を生じない。
【００３３】
また、電流の範囲設定はファンモータおよび換気装置に要求される風量の精度に応じて、電流範囲の設定数等を決定すれば良い。
【００３４】
また、実施例２では、雰囲気温度と基準温度の温度差から、規定回転数記憶手段より検索した回転数を直接加・減して補正する制御方法を採用したが、電流範囲をシストすることによって、検索する規定回転数を補正する制御方法でも良く、その作用効果に差異を生じない。
【００３５】
【発明の効果】
以上の実施例から明らかなように、本発明によれば、風量指示手段によって指示された風量と、この指示風量に応じて範囲分けされた印加電圧範囲に対応して、ファンモータにかかる静圧を概略判断して、段階的に規定された回転数で一定に運転制御するので、ホールＩＣ等の磁極検出素子の基板への実装位置がずれるなどの影響により、通電位相が変化しても指示風量に対して略一定で制御できるファンモータおよび換気装置が得られる。
【００３６】
また、換気する空気の温度を検出する雰囲気温度検出手段を設け、検出された雰囲気温度と基準の所定温度とを比較し、その温度差から段階的に規定された回転数を補正する規定回転数補正手段を備えることにより、雰囲気温度の変化により、電機子巻線の抵抗や、磁石の磁束量や、空気比重量が変化しても指示風量に対して略一定で制御できるファンモータおよび換気装置が得られる。
【００３７】
また、風量指示手段によって指示された風量と、この指示風量に応じて範囲分けされた電流範囲に対応して、ファンモータにかかる静圧を概略判断して、段階的に規定された回転数で一定に運転制御するので、ホールＩＣ等の磁極検出素子の基板への実装位置がずれるなどの影響により、通電位相が変化しても指示風量に対して略一定で制御できるファンモータおよび換気装置が得られる。
【００３８】
また、換気する空気の温度を検出する雰囲気温度検出手段を設け、検出された雰囲気温度と基準の所定温度とを比較し、その温度差から段階的に規定された回転数を補正する規定回転数補正手段２１を備えることにより、雰囲気温度の変化により、電機子巻線の抵抗や、磁石の磁束量や、空気比重量が変化しても指示風量に対して略一定で制御できるファンモータおよび換気装置が得られる。
【図面の簡単な説明】
【図１】本発明の実施例１におけるファンモータを搭載した換気装置の構成を示すブロック図
【図２】同ファンモータの風量−静圧と風量−回転数特性を示すグラフ
【図３】同ファンモータにおける規定回転数の記憶内容の一例を示す表を表す図
【図４】同ファンモータにおける規定回転数の補正内容の一例を示す表を表す図
【図５】同ファンモータの雰囲気温度変化時の風量−静圧と風量−回転数特性を示すグラフ
【図６】本発明の実施例２におけるファンモータを搭載した換気装置の構成を示すブロック図
【図７】同ファンモータにおける規定回転数の記憶内容の一例を示す表を表す図
【図８】従来のファンモータにおける通電位相の違いによる風量−静圧と風量−回転数特性を示すグラフ
【符号の説明】
１ファンモータ
２ＤＣモータ
３磁石回転子
４雰囲気温度検出手段
５ホールＩＣ
６通電制御手段
７ａスイッチング素子群
７ｂ駆動ロジック回路
８規定回転数補正手段
９運転回転数検出手段
１０印加電圧範囲判別手段
１１印加電圧制御手段
１２規定回転数記憶手段
１３風量指示手段
１４ダクト
１５壁
１６吐出口
１７電気子巻線
１８印加電圧検出手段
１９換気装置
２０ファンモータ
２１換気装置
２２電流検出手段
２３電流範囲判別手段
２４規定回転数記憶手段
２５規定回転数補正手段[0001]
BACKGROUND OF THE INVENTION
The present invention mainly relates to a fan motor mounted on a ventilator for exhaust and air supply such as a range hood and a ceiling-embedded type, and a ventilator equipped with the fan motor.
[0002]
[Prior art]
In recent years, in range hoods and ceiling-embedded ventilators, etc., after reducing power consumption through higher efficiency, the effects of pressure loss due to duct piping configuration, external air pressure, and changes in pressure loss due to clogging of filters, etc. There is a need for a fan motor with good controllability that can ventilate with the optimum air volume according to the cooking condition and the situation of the living room. In addition, a fan motor that is quieter and consumes less power is being demanded as the 24-hour constant ventilation increases.
[0003]
Conventionally, as an example of this type of fan motor, as disclosed in Japanese Patent Application Laid-Open No. 5-146189, a rotational speed detecting means for detecting the operating rotational speed of the fan motor and an applied voltage detecting means for detecting a voltage applied to the fan motor And a prescribed rotational speed storage means for storing a prescribed rotational speed necessary for a constant operation with respect to the indicated air flow in correspondence with a plurality of applied voltages, and a regulation required at the applied voltage detected by the applied voltage detecting means. A fan motor is disclosed in which the rotation speed is searched from a specified rotation speed storage means, and the applied voltage is increased or decreased so that the operating rotation speed detected by the rotation speed detection means matches the searched rotation speed. However, with the increase in 24-hour constant ventilation, the number of magnetic poles of the magnet rotor has been increased from 4 poles to 6 poles and 8 poles for higher efficiency. In motors with high output exceeding 25 W, the energization to the armature winding of the DC motor is reduced from 120 degrees in order to reduce the torque ripple and torque change rate and suppress the generation of noise and vibration. There is also a need for energization control that increases the conduction angle from 130 degrees, from 130 degrees to 140 degrees, and from 140 degrees to 150 degrees. To that end, the zero position of the induced voltage is detected from the magnetic rotor magnetic pole position. Instead of this method, a method of detecting the magnetic pole position of the magnet rotor using a Hall IC or the like and switching the energized phase is adopted. In the case of such a DC motor, the Hall IC is mounted and soldered on the printed circuit board, and a certain amount of air gap is provided from the magnet rotor so that the magnetic flux leakage can be detected by the Hall IC. This is a structure of a DC motor attached to a stator or the like inside the DC motor. In motors with an output of 25 W or less, an increasing number of systems adopt a DC motor with a motor drive circuit built into the motor in order to reduce the size of the control circuit. In such a case, mount and solder a Hall IC on the printed circuit board, a logic circuit that switches the energization phase to the armature winding based on the output signal of the Hall IC, and a general-purpose drive IC that incorporates a switching element. The DC motor has a structure in which a printed circuit board is attached to a stator or the like inside the DC motor so that a certain amount of air gap is provided from the magnet rotor and leakage flux of the magnet can be detected by the Hall IC.
[0004]
[Problems to be solved by the invention]
According to such a conventional fan motor, the energization phase to the armature winding of the DC motor is switched based on the signal output of the Hall IC, but the Hall IC is mounted on the printed circuit board by the mounting machine. Even if the mounting accuracy is high, it is displaced by 0.2 mm to 0.3 mm (on a plane). Further, since the amount of adhesive applied during mounting also varies, the gap between the magnet and the Hall IC varies, resulting in a difference in signal change of the Hall IC. Furthermore, the sensor sensitivity of the Hall IC also varies within ± 20 mT. When these variations are combined, in the case of a DC motor having a magnet outer diameter of 50 mm and a magnet pole number of 8 poles, the energization phase with respect to the induced voltage phase is an electrical angle. The variation is about ± 10 degrees, and the applied voltage and current required to output the same torque and rotation speed vary greatly depending on the variation in the energization phase. In general, when the commutation timing is delayed and the energization phase becomes a delayed phase, the applied voltage and current for outputting the same torque and rotation speed increase, and conversely, when the energization phase is the advanced phase, Both applied voltage and current are lowered. FIG. 8 shows the air volume-static pressure and air volume-rotation speed characteristics of the conventional fan motor when the energized phase is the leading phase motor and the delayed phase motor at the same indicated air volume and the same applied voltage. As shown in the figure, a motor with a delayed energization phase at the same indicated air volume and the same applied voltage has a higher rotational speed than a motor with a lead phase. Therefore, since the table of the applied voltage to the DC motor and the specified rotational speed for the commanded air volume varies depending on the difference in the energization phase, when the table is created with the DC motor centering on the energization phase, the energization phase is the leading phase In order to make the rotation speed the same as the specified rotation speed, the voltage applied to the DC motor is boosted, so that the air volume increases significantly. Conversely, if the energization phase is a delayed phase, the rotation speed is set to the specified rotation speed. Therefore, the voltage applied to the DC motor is stepped down to cause the air volume to be greatly reduced.
[0005]
In addition, in order to realize constant air volume control, it is necessary to create a table individually after confirming the position of the Hall IC, or to select and mount a DC motor, and there is a problem that there is no versatility. .
[0006]
The present invention solves such a conventional problem, and even if it is a fan motor equipped with a DC motor that switches energization to the armature winding based on the signal output of the Hall IC, the air volume is indicated. It is an object of the present invention to provide a fan motor that can be controlled substantially uniformly with respect to the air volume and a ventilation device equipped with the fan motor.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the fan motor of the present invention is a fan motor equipped with a DC motor, and includes a position detection means for detecting the magnetic pole position of the magnet rotor of the DC motor, and a signal from the position detection means. Based on the energization control means for controlling energization of the plurality of armature windings of the DC motor, the rotation speed detection means for detecting the operating rotation speed of the DC motor from the signal output of the position detection means, and the fan motor An air volume instruction means for instructing an operating air volume; The applied voltage detecting means for detecting the applied voltage to the DC motor, and the applied voltage detected by the applied voltage detecting means are A plurality of voltage ranges applied to the DC motor for each air volume instructed by the air volume instructing means In Applied voltage range discriminating means for classifying discriminating, and the rotational speed necessary for the DC motor to perform substantially constant operation at each air volume instructed by the air volume instructing means is stored for each air volume and for each of a plurality of applied voltage ranges. A specified rotation number corresponding to the operating rotation number detected by the rotation number detecting unit, the air volume specified by the air volume indicating unit, and the applied voltage range detected by the applied voltage range determining unit. A fan having an applied voltage control means for controlling a voltage applied to the DC motor so that the selected specified revolution speed is equal to the detected operation revolution speed. This is a motor configuration.
[0008]
According to the present invention, even if a DC motor that detects the magnetic pole position of the magnet rotor using a magnetic pole detection element such as a Hall IC and switches the energized phase is mounted, a plurality of applied voltage ranges are set for the indicated air volume. In addition, since the static pressure applied to the fan motor is roughly determined and the motor is operated step by step at a constant number of rotations, a fan motor that can be controlled to be substantially constant with respect to the indicated air volume regardless of changes in the energization phase. can get.
[0009]
The other means includes an ambient temperature detection means for detecting an ambient temperature in which the fan motor is installed, an air volume instruction means for instructing an operating air volume of the fan motor, The applied voltage detecting means for detecting the applied voltage to the DC motor, and the applied voltage detected by the applied voltage detecting means are A plurality of voltage ranges applied to the DC motor for each air volume instructed by the air volume instructing means In Applied voltage range discriminating means for classifying discriminating, and the necessary number of rotations of the DC motor at the reference temperature for each air volume instructed by the air volume instructing means for each air volume and each of a plurality of applied voltage ranges. And a regulation for correcting the specified rotational speed selected from the reference temperature specified rotational speed storage means from the difference between the temperature detected by the ambient temperature detecting means and the reference temperature. And an applied voltage control means for controlling the applied voltage to the DC motor so that the specified rotational speed corrected by the specified rotational speed corrector and the detected operating rotational speed are the same. The fan motor is configured as follows.
[0010]
According to the present invention, even if the magnetic flux amount and the air specific weight change due to changes in the ambient temperature, the specified rotational speed is corrected, so that a fan motor that can be controlled to be substantially constant with respect to the indicated air volume is obtained. .
[0011]
The other means is a fan motor equipped with a DC motor, and a position detection means for detecting a magnetic pole position of a magnet rotor of the DC motor, and a plurality of the DC motors based on a signal of the position detection means. Energization control means for controlling energization of the armature winding, current detection means for detecting the current flowing through the DC motor, and rotation speed detection means for detecting the operating rotation speed of the DC motor from the signal output of the position detection means An air volume instruction means for instructing an operating air volume of the fan motor, a current range determination means for classifying and determining a plurality of current ranges to the DC motor for each air volume instructed by the air volume instruction means, and the air volume Specified rotational speed storage for storing the necessary rotational speed of the DC motor for each air volume and for each of a plurality of current ranges in order to perform substantially constant operation at each air volume instructed by the instruction means A predetermined rotational speed corresponding to a current range detected by the operating speed detected by the rotational speed detecting means, the air volume indicated by the air volume indicating means, and the current range determining means. The fan motor has a configuration in which applied voltage control means for controlling the applied voltage to the DC motor is arranged so that the selected specified rotational speed is the same as the detected operating rotational speed. It is.
[0012]
According to the present invention, even if a DC motor that is a high-voltage PWM drive and detects a magnetic pole position of a magnet rotor using a magnetic pole detection element such as a Hall IC and switches an energized phase is mounted, Multiple current ranges are set, the static pressure applied to the fan motor is roughly judged, and the motor is operated at a constant multi-stage rotation speed step by step. A fan motor that can be controlled with is obtained.
[0013]
The other means includes an ambient temperature detecting means for detecting an ambient temperature in which the fan motor is installed, an air volume instruction means for instructing an operating air volume of the fan motor, and for each air volume instructed by the air volume instruction means, Current range discriminating means for classifying and discriminating a plurality of current ranges to the DC motor, and the number of revolutions required for the DC motor at a reference temperature for substantially constant operation at each air quantity instructed by the air quantity instructing means, Selection from the reference temperature time specified rotation speed storage means for each air volume and a plurality of current ranges, and the reference temperature time specified rotation speed storage means from the difference between the temperature detected by the ambient temperature detection means and the reference temperature A specified rotational speed correcting means for correcting the specified rotational speed, so that the specified rotational speed corrected by the specified rotational speed correcting means is the same as the detected operating rotational speed. Serial is obtained by the configuration of the fan motor made by arranging a voltage control means for controlling a voltage applied to the DC motor.
[0014]
According to the present invention, even if the magnetic flux amount and the air specific weight change due to changes in the ambient temperature, the specified rotational speed is corrected, so that a fan motor that can be controlled to be substantially constant with respect to the indicated air volume is obtained. .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The present invention includes an applied voltage range discriminating means for classifying and discriminating a plurality of applied voltage ranges to the DC motor for each air volume instructed by the air volume instructing means, and a substantially constant operation at each air volume instructed by the air volume instructing means. In order to achieve the required rotational speed of the DC motor for each air volume and for each of a plurality of applied voltage ranges, the specified rotational speed storage means, and the operating rotational speed detected by the rotational speed detection means and the air volume The specified rotational speed corresponding to the air volume instructed by the instruction means and the applied voltage range detected by the applied voltage range discriminating means is selected from the specified rotational speed storage means, and the selected rotational speed and the detected operating rotational speed are selected. Is configured to control the applied voltage to the DC motor so that the static pressure applied to the fan motor is roughly determined according to a plurality of applied voltage ranges. An effect that operating in stepwise rotational speed constant.
[0016]
Also provided is an ambient temperature detection means for detecting the ambient temperature in which the fan motor is installed, and a regulation selected by the standard speed specified revolution speed storage means from the difference between the temperature detected by the ambient temperature detection means and the reference temperature. An applied voltage for controlling the applied voltage to the DC motor so that the specified rotational speed corrected by the specified rotational speed correcting means is the same as the detected operating rotational speed. The fan motor is configured with control means, and the specified rotational speed is corrected according to the voltage range even if the magnetic flux amount and air specific weight change due to changes in the ambient temperature. Has an effect.
[0017]
Further, a current range discriminating means for classifying and discriminating a plurality of current ranges to the DC motor, and a rotational speed necessary for the DC motor to perform a substantially constant operation at each air volume instructed by the air volume instructing means, for each air volume, Provided with a prescribed rotational speed storage means for storing each of a plurality of current ranges, and a prescribed rotational speed corresponding to the detected operational rotational speed, the air volume instructed by the air volume instructing means, and the current range detected by the current range discriminating means. A fan having an applied voltage control means for controlling a voltage applied to the DC motor so that the selected specified revolution speed is equal to the detected operation revolution speed. This is a motor configuration, and it is possible to roughly determine the static pressure applied to the fan motor in accordance with a plurality of current ranges with respect to the indicated air volume, and to operate at a constant rotational speed step by step. To.
[0018]
Also provided is an ambient temperature detection means for detecting the ambient temperature in which the fan motor is installed, and a regulation selected by the standard speed specified revolution speed storage means from the difference between the temperature detected by the ambient temperature detection means and the reference temperature. An applied voltage for controlling the applied voltage to the DC motor so that the specified rotational speed corrected by the specified rotational speed correcting means is the same as the detected operating rotational speed. The fan motor is configured with control means, and the specified rotational speed is corrected according to the current range even if the magnetic flux amount and air specific weight change due to changes in the ambient temperature. Has an effect.
[0019]
Embodiments of the present invention will be described below with reference to FIGS.
[0020]
【Example】
Example 1
As shown in FIGS. 1 to 5, reference numeral 1 denotes a centrifugal fan motor equipped with a DC motor 2, and 19 denotes a ventilation device incorporating the fan motor 1. The discharge port 16 of the fan motor 1 exhausts indoor air contaminated with cigarette smoke, cooking waste gas, and oil smoke, which is sucked by the fan motor 1 through the wall 15 of the building via the duct 14. Reference numeral 4 denotes an ambient temperature detecting means such as a thermistor for detecting the temperature of air to be ventilated. The DC motor 2 includes a Hall IC 5 for detecting the magnetic pole position of the magnet rotor 3, a drive IC (not shown) equipped with an energization control means 6 including a drive logic circuit 7a and a switching element group 7b, and an electronic device such as a capacitor. This is a structure with a built-in printed circuit board (not shown) on which components are mounted. Based on the signal output of the Hall IC 5, the drive logic circuit 7a controls ON / OFF of the switching element group 7b to control energization switching to the armature winding 17. 13 is an air volume instruction means for instructing the operation air volume of the fan motor 1 such as weak, medium and strong, 9 is an operation speed detection means for detecting the operation speed from the signal output of the Hall IC 5, and 18 is to the DC motor 2. Applied voltage detecting means for detecting the applied voltage. Reference numeral 10 denotes applied voltage range discriminating means for classifying and discriminating a plurality of applied voltage ranges to the DC motor 2 for each air volume in which the applied voltage detected by the applied voltage detecting means 18 is instructed by the air volume indicating means 13. Is a specified rotational speed storage means at the reference temperature, and the DC motor 2 is necessary for a substantially constant operation at each air volume instructed by the air volume instructing means 13 when the temperature of the air ventilated by the ventilator 19 is a predetermined atmospheric temperature. Is stored as a prescribed number of rotations for each air volume and for each of a plurality of applied voltage ranges. Reference numeral 8 denotes a specified rotational speed correcting means that compares the temperature detected by the ambient temperature detecting means 4 with a predetermined reference temperature and corrects the specified rotational speed according to the temperature difference. Reference numeral 11 denotes an applied voltage control means, which selects a specified rotational speed corresponding to the indicated air volume and the applied voltage range from the specified rotational speed storage means 12, and the specified rotational speed correction means 8 corrects the selected specified rotational speed and corrects it. In this configuration, the voltage applied to the DC motor 2 is controlled so that the rotational speed and the operating rotational speed are the same. FIG. 5 shows the air volume-static pressure and air volume-rotational speed characteristics when the ambient temperature is high and when the temperature is low and the same indicated air volume and the same applied voltage. As shown in the figure, the rotation speed is higher when the ambient temperature is higher than when the ambient temperature is lower at the same indicated air volume and the same applied voltage. Therefore, when the ambient temperature is higher than the reference temperature, the voltage applied to the DC motor is increased in order to make the rotational speed the same as the specified rotational speed. When the temperature is lower than the reference temperature, the voltage applied to the DC motor is stepped down in order to make the rotation speed the same as the specified rotation speed, so the air volume will be greatly reduced. The means 8 corrects the specified rotational speed to the plus side when the ambient temperature detected by the ambient temperature detection means 4 is higher than the reference predetermined temperature, and conversely when the detected ambient temperature is lower than the reference predetermined temperature. Correct the specified rotational speed to the minus side.
[0021]
According to the fan motor 1 of the present invention as described above, the static pressure applied to the fan motor 1 is corresponding to the air volume instructed by the air volume instructing means 13 and the applied voltage range divided according to the instructed air volume. Since the operation is controlled at a constant speed with a stepwise specified rotational speed, the commanded air volume will change even if the energization phase changes due to the effect of shifting the mounting position of the magnetic pole detection element such as Hall IC on the board. Thus, a fan motor and a ventilator that can be controlled substantially constant are obtained.
[0022]
In addition, an atmospheric temperature detecting means 20 for detecting the temperature of the air to be ventilated is provided, the detected atmospheric temperature is compared with a predetermined reference temperature, and the specified rotation for correcting the rotational speed specified stepwise from the temperature difference. By providing the number correction means 21, a fan motor that can be controlled to be substantially constant with respect to the indicated air volume even if the resistance of the armature winding, the amount of magnetic flux of the magnet, or the air specific weight changes due to changes in the ambient temperature, A ventilation device is obtained.
[0023]
Note that fan motors and ventilators installed in almost constant temperature and humidity environments, such as clean rooms, do not have to provide a means to detect the ambient temperature and correct the specified rotational speed. On the other hand, there is no difference in the operational effect of driving at a substantially constant level.
[0024]
In the first embodiment, the DC motor 2 has a built-in Hall IC 5 for detecting the magnetic pole position. However, the DC motor 2 may be configured as a sensorless drive type DC motor for detecting the magnetic pole position from an induced voltage or the like. No difference.
[0025]
The range of the applied voltage may be determined by determining the number of applied voltage ranges set according to the accuracy of the air volume required for the fan motor and the ventilator.
[0026]
In the first embodiment, the control method for correcting the specified rotational speed by directly adding or subtracting the rotational speed retrieved from the specified rotational speed storage means 12 based on the difference between the ambient temperature and the reference temperature is used. However, the voltage range is shifted. Then, the method may be a method of correcting the specified rotational speed to be searched, and there is no difference in the operation effect.
[0027]
In the case of the PWM drive method, the peak value after rectification and smoothing is detected, and a value obtained by multiplying the detected peak value by the duty may be controlled as a voltage, and there is no difference in the operation effect. If the peak value does not vary, the duty may be controlled as it is as a voltage.
[0028]
(Example 2)
As shown in FIGS. 6 and 7, reference numeral 26 denotes a centrifugal fan motor having the DC motor 2 mounted thereon, and reference numeral 27 denotes a ventilation device having the fan motor 26 built therein. The discharge port 16 of the fan motor 26 is connected to the duct 14. The duct 14 exhausts the indoor air contaminated with cigarette smoke, cooking waste gas, and oil smoke, which is sucked by the fan motor 1 through the wall 15 of the building. Reference numeral 20 denotes an ambient temperature detecting means for detecting the temperature of air to be ventilated. The DC motor 2 includes a Hall IC 5 for detecting the magnetic pole position of the magnet rotor 3, a drive IC (not shown) equipped with an energization control means 6 including a drive logic circuit 7a and a switching element group 7b, and an electronic device such as a capacitor. This is a structure with a built-in printed circuit board (not shown) on which components are mounted. Based on the signal output of the Hall IC 5, the drive logic circuit 7a controls ON / OFF of the switching element group 7b to control energization switching to the armature winding 17. 13 is an air volume indicating means for instructing the operating air volume of the fan motor 26 such as weak, medium, strong, etc. 9 is an operating speed detecting means for detecting the operating speed from the signal output of the Hall IC 5, and 22 is the DC motor 2. This is current detection means for detecting a drive current. Reference numeral 23 denotes current range determination means for classifying and determining a plurality of current ranges to the DC motor 2 for each air volume in which the current detected by the current detection means 22 is instructed by the air volume instruction means 13. With the specified rotational speed storage means, the required rotational speed of the DC motor 2 is set for each of the air volumes instructed by the air volume instructing means 13 at a predetermined atmospheric temperature. It is stored as a specified rotational speed for each air volume and for each of a plurality of current ranges. 25 is a specified rotational speed correcting means, which compares the temperature detected by the ambient temperature detecting means 20 with a predetermined reference temperature, and if the detected temperature is higher than the reference temperature, corrects the specified rotational speed to the plus side, Conversely, if the detected temperature is lower than the reference temperature, the specified rotational speed is corrected to the minus side. Reference numeral 11 denotes applied voltage control means, which selects a specified rotational speed corresponding to the indicated air volume and current range from the specified rotational speed storage means 24, and corrects the selected specified rotational speed by the specified rotational speed correcting means 25, thereby correcting the specified rotational speed. In this configuration, the voltage applied to the DC motor 2 is controlled so that the number and the operating rotational speed are the same.
[0029]
According to the fan motor 26 of the present invention as described above, at a rotational speed defined in a stepwise manner corresponding to the air volume instructed by the air volume instructing means 13 and the current range divided according to the instructed air volume. A fan motor and a ventilator that can be controlled to be almost constant with respect to the indicated air volume even if the energization phase changes due to the effect of shifting the mounting position of the magnetic pole detection element such as Hall IC on the substrate because it is controlled to operate constantly. can get.
[0030]
In addition, an atmospheric temperature detecting means 20 for detecting the temperature of the air to be ventilated is provided, the detected atmospheric temperature is compared with a predetermined reference temperature, and the specified rotation for correcting the rotational speed specified stepwise from the temperature difference. By providing the number correction means 21, a fan motor that can be controlled to be substantially constant with respect to the indicated air volume even if the resistance of the armature winding, the amount of magnetic flux of the magnet, or the air specific weight changes due to changes in the ambient temperature, A ventilation device is obtained.
[0031]
Note that fan motors and ventilators installed in almost constant temperature and humidity environments, such as clean rooms, do not have to provide a means to detect the ambient temperature and correct the specified rotational speed. On the other hand, there is no difference in the operational effect of driving at a substantially constant level.
[0032]
In the second embodiment, the DC motor 2 has a built-in Hall IC 5 for detecting the magnetic pole position. However, a sensorless drive type DC motor for detecting the magnetic pole position from an induced voltage or the like may be used. No difference.
[0033]
The current range may be set by determining the number of current ranges set according to the accuracy of the air volume required for the fan motor and the ventilator.
[0034]
Further, in the second embodiment, a control method is adopted in which the rotational speed retrieved from the specified rotational speed storage means is directly corrected based on the temperature difference between the ambient temperature and the reference temperature, and is corrected. A control method for correcting the specified rotational speed to be searched may be used, and there is no difference in operation and effect.
[0035]
【The invention's effect】
As apparent from the above embodiments, according to the present invention, the static pressure applied to the fan motor in accordance with the air volume instructed by the air volume instructing means and the applied voltage range divided according to the instructed air volume. Since the operation is controlled at a constant speed at a stepwise specified rotational speed, instructions are given even if the energization phase changes due to the effect that the mounting position of the magnetic pole detection element such as Hall IC on the substrate is shifted. A fan motor and a ventilator that can be controlled to be substantially constant with respect to the air volume are obtained.
[0036]
In addition, an ambient temperature detection means for detecting the temperature of the air to be ventilated is provided, the detected ambient temperature is compared with a predetermined reference temperature, and the specified rotational speed is corrected stepwise from the temperature difference. By providing the correction means, a fan motor and a ventilator that can be controlled to be substantially constant with respect to the indicated air volume even if the resistance of the armature winding, the magnetic flux amount of the magnet, or the air specific weight changes due to changes in the ambient temperature Is obtained.
[0037]
In addition, the static pressure applied to the fan motor is roughly determined in accordance with the air volume instructed by the air volume instructing means and the current range divided according to the instructed air volume, and the rotational speed specified in stages. A fan motor and a ventilator that can be controlled to be almost constant with respect to the indicated air volume even if the energization phase changes due to the effect of shifting the mounting position of the magnetic pole detection element such as Hall IC on the substrate because it is controlled to operate constantly. can get.
[0038]
In addition, an ambient temperature detection means for detecting the temperature of the air to be ventilated is provided, the detected ambient temperature is compared with a predetermined reference temperature, and the specified rotational speed is corrected stepwise from the temperature difference. By providing the correction means 21, a fan motor and a ventilation that can be controlled to be substantially constant with respect to the indicated air volume even when the resistance of the armature winding, the magnetic flux amount of the magnet, and the air specific weight change due to a change in the ambient temperature. A device is obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a ventilator equipped with a fan motor in Embodiment 1 of the present invention.
FIG. 2 is a graph showing air volume-static pressure and air volume-rotational speed characteristics of the fan motor.
FIG. 3 is a view showing a table showing an example of stored contents of a specified rotation speed in the fan motor
FIG. 4 is a view showing a table showing an example of correction contents of a specified rotational speed in the fan motor
FIG. 5 is a graph showing air volume-static pressure and air volume-rotational speed characteristics when the ambient temperature of the fan motor changes.
FIG. 6 is a block diagram showing the configuration of a ventilator equipped with a fan motor in Embodiment 2 of the present invention.
FIG. 7 is a diagram showing a table showing an example of stored contents of a specified rotation speed in the fan motor
FIG. 8 is a graph showing air volume-static pressure and air volume-rotational speed characteristics according to the difference in energization phase in a conventional fan motor.
[Explanation of symbols]
1 Fan motor
2 DC motor
3 Magnet rotor
4 Atmospheric temperature detection means
5 Hall IC
6 Energization control means
7a Switching element group
7b Drive logic circuit
8 Specified rotational speed correction means
9 Driving speed detection means
10 Applied voltage range discrimination means
11 Applied voltage control means
12 Specified rotational speed storage means
13 Air volume instruction means
14 Duct
15 walls
16 Discharge port
17 Electron winding
18 Applied voltage detection means
19 Ventilator
20 Fan motor
21 Ventilator
22 Current detection means
23 Current range discrimination means
24 Specified rotational speed storage means
25 Specified rotational speed correction means

Claims

A fan motor equipped with a DC motor, the position detecting means for detecting the magnetic pole position of the magnet rotor of the DC motor;
Energization control means for controlling energization to the plurality of armature windings of the DC motor based on the signal of the position detection means;
A rotational speed detecting means for detecting an operating rotational speed of the DC motor from a signal output of the position detecting means;
An air volume instruction means for instructing an operating air volume of the fan motor;
An applied voltage detecting means for detecting an applied voltage to the DC motor;
Applied voltage detected by the applied voltage detecting means for each air volume indicated by the airflow rate instruction means, the applied voltage range discriminating means for classifying determination to a plurality of applied voltages ranging to the DC motor,
A specified rotational speed storage means for storing a rotational speed necessary for the DC motor for each air volume and for each of a plurality of applied voltage ranges in order to perform a substantially constant operation at each air volume instructed by the air volume instruction means;
From the specified rotational speed storage means, the operating rotational speed detected by the rotational speed detecting means, the air volume instructed by the air volume instructing means, and the specified rotational speed corresponding to the applied voltage range detected by the applied voltage range discriminating means. A fan motor which is selected and provided with an applied voltage control means for controlling the applied voltage to the DC motor so that the selected specified rotational speed is equal to the detected operating rotational speed.

Atmospheric temperature detection means for detecting the atmospheric temperature where the fan motor is installed;
An air volume instruction means for instructing an operating air volume of the fan motor;
An applied voltage detecting means for detecting an applied voltage to the DC motor;
Applied voltage detected by the applied voltage detecting means for each air volume indicated by the airflow rate instruction means, the applied voltage range discriminating means for classifying determination to a plurality of applied voltages ranging to the DC motor,
Reference temperature time specified rotational speed storage that stores the required rotational speed of the DC motor at the reference temperature for each air volume and for each of a plurality of applied voltage ranges in order to perform substantially constant operation at each air volume instructed by the air volume instruction means. Means,
A specified rotational speed correcting means for correcting the specified rotational speed selected from the specified rotational speed storage means at the reference temperature from the difference between the temperature detected by the ambient temperature detecting means and the reference temperature;
2. A fan motor according to claim 1, further comprising applied voltage control means for controlling an applied voltage to the DC motor so that the specified rotational speed corrected by the specified rotational speed correcting means is the same as the detected operating rotational speed. .

A fan motor equipped with a DC motor, the position detection means for detecting the magnetic pole position of the magnet rotor of the DC motor, and the energization of the armature windings of the DC motor based on the signal of the position detection means Current control means for controlling the current of the DC motor, current detection means for detecting the current of the DC motor, rotational speed detection means for detecting the rotational speed of the DC motor from the signal output of the position detection means, and operation of the fan motor An air volume instruction means for instructing an air volume, a current range determination means for classifying and determining a plurality of current ranges to the DC motor for each air volume instructed by the air volume instruction means, and each of the air volume instruction means instructed A predetermined rotational speed storage means for storing the rotational speed necessary for the DC motor for each air volume and each of a plurality of current ranges in order to perform a substantially constant operation with the air volume; The specified rotational speed corresponding to the operating rotational speed detected by the detecting means, the air volume instructed by the air volume instructing means, and the current range detected by the current range determining means is selected from the specified rotational speed storage means, and this selection is made. A fan motor provided with an applied voltage control means for controlling an applied voltage to the DC motor so that the specified rotational speed is the same as the detected operating rotational speed.

Atmospheric temperature detection means for detecting the ambient temperature in which the fan motor is installed; air volume instruction means for instructing the operating air volume of the fan motor; and for each air volume instructed by the air volume instruction means, a plurality of DC motors are provided. Current range discriminating means for classifying and discriminating the current range of the DC motor, and the number of revolutions required for the DC motor at the reference temperature for a substantially constant operation at each air quantity instructed by the air quantity instructing means, for each air quantity, a plurality of currents The specified number of revolutions selected from the reference number of revolutions at the reference temperature is corrected based on the difference between the reference temperature at the reference temperature and the reference temperature at the reference temperature stored for each range. To the DC motor so that the specified rotational speed corrected by the specified rotational speed correcting means is the same as the detected operating rotational speed. Fan motor according to claim 3, wherein comprising arranging the applied voltage control means for controlling the applied voltage.

A ventilator equipped with the fan motor according to any one of claims 1 to 4.