JP2004129383A - Fan motor and electrical apparatus equipped with the fan motor - Google Patents

Fan motor and electrical apparatus equipped with the fan motor Download PDF

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Publication number
JP2004129383A
JP2004129383A JP2002290052A JP2002290052A JP2004129383A JP 2004129383 A JP2004129383 A JP 2004129383A JP 2002290052 A JP2002290052 A JP 2002290052A JP 2002290052 A JP2002290052 A JP 2002290052A JP 2004129383 A JP2004129383 A JP 2004129383A
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Prior art keywords
motor
correlation
current
characteristic deviation
voltage
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JP4409157B2 (en
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Masayuki Takada
高田　昌亨
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Panasonic Ecology Systems Co Ltd
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Matsushita Ecology Systems Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fan motor, in which an air quantity is controlled to a constant value relative to an designated air quantity, in a fan motor model equipped with a DC motor performing energization switching for an armature winding, on the basis of a signal of a Hall IC, and to provide a ventilator equipped with the fan motor. <P>SOLUTION: A characteristic deviation determining means 10 applies the predetermined voltage to a DC motor 2, detects an operating rotational speed and a drive current, compares current characteristics of a reference DC motor with those of the drive current, determines it as being delay phase, if a current value which the current characteristic of the predetermined DC motor indicates is lower than a driving current value; determines it as being a lead phase if it is an opposite case; and determines a correction factor for performing the negative correction of a specified speed which is stored in a correlation storing means 12, corresponding to a difference of the current value. Thus, the fan motor and the ventilator, which are capable of performing constant operation with high accuracy and the designated air quantity, are provided, without being influenced by the variations in the characteristics of the DC motor 2 or the change in the atmospheric temperature. <P>COPYRIGHT: (C)2004,JPO

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や給湯機、乾燥機、空気清浄機、ファンフィルタユニット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電気機器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おり、高効率化のために、誘導電動機からＤＣモータを搭載するようになってきた。さらには、磁石回転子の磁極数も４極から８極へと多極化してきている。そして、２５Ｗを越える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、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構造となっている。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モータの構造となっており、このようなホールＩＣ等の磁極検出素子を内蔵したＤＣモータを搭載したファンモータでの最適風量制御が求められている。
【０００３】
従来、この種のファンモータの一例として特許文献１〜３に示されたものが知られており、その構成はＤＣモータを搭載し、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選定し、回転数検出手段によって検出した運転回転数と選定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の構成である。
【０００４】
また、特許文献４に示されたものが知られており、その構成は送排風機を所定の基準回転速度で実運転したときの、３相誘導電動機への入力電力を検出し、予め求められた、送排風機の基準回転速度における送排風量と入力電力の関係を、３相誘導電動機の効率と排送風機のファン効率が既知であることを利用した関数式から運転風量を算出し、算出された送排風量から、所望の送排風量を得られる回転速度を前記関数式から算出して制御する構成である。
【０００５】
また、特許文献５に示されたものが知られており、その構成はＤＣモータを搭載したファンモータを定電流スタートし、その時の運転回転数を検出し、この運転回転数から換気扇の負荷量としての据え付け条件を検索し、検索した負荷量に基づいて設定風量に対応したファンモータの設定回転数を求め、電圧を可変しながら設定回転数と運転回転数が一致するよう制御する（このとき電流値は制御対象ではない）構成である。
【０００６】
【特許文献１】
特開平５−１４６１８９号公報
【特許文献２】
特開平５−２２３０９１号公報
【特許文献３】
特開平８−１４０３９０号公報
【特許文献４】
特開昭６２−１６２７９１号公報
【特許文献５】
特開平８−１５２１６５号公報
【０００７】
【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、特許文献１〜３の構成において、高効率化や低振動化のために、特許文献５に示されるように、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う場合、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１１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昇圧していくので、風量が大幅に増加し、逆に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。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り、精度の高い風量一定制御を汎用性のある構成で実現することが要求されている。
【０００８】
また、特許文献４に示される送排風機の風量制御方法では、ファンモータにおいて、静圧や空気温度の変化によって、ファンブレードに対する空気の流入角度、流入位置や、渦の発生度合いが変化するので、ファン効率は非線形となり、容易に既知とはならず、さらに、ファン負荷（トルク）や磁石温度、巻線抵抗値の変化によって、モータの損失である銅損、鉄損、機械損の割合や、その絶対値が変化するのでモータ効率も非線形となり、容易に既知とはならないものであり、常温であっても開示された内容では、風量一定制御の実現は困難であり、一品一様の制御仕様となるとともに、精度が高い風量制御ができないという課題があり、一品一様の制御仕様となることなく、精度が高い風量一定制御を実現することが要求されている。
【０００９】
また、特許文献５に示される換気扇の風量制御装置では、一定時間毎の定電流下における回転数のみからの判断によって、ダクト配管などの圧力損失条件等の設置条件を推測しているので、推測時に空気温度の変化による空気比重量の変化や、外風等の影響により負荷条件を実際とは異なる状態と間違って判断する可能性が非常に高いため、精度が高い風量制御ができないという課題があった。また、仮に推測時点での負荷条件を正確に推測できたとしても、負荷条件の検知が、そのとき限りの１ポイントであるため、居室内のドアの開閉状況や、空気温度が推測時と異なる環境下では、設定風量とは異なる風量にあえて制御するので、精度が高い風量一定制御ができないという課題があった。また、ホールＩＣなどの磁極検出素子によって、磁石回転子の磁極位置を検知し、通電相の切替を行うので、上述した特許文献１〜３の場合と同様の課題があり、精度が高い風量一定制御を汎用性のある構成で実現することが要求されている。
【００１０】
また、近年は高圧ＰＷＭ駆動方式のＤＣモータが増加しているため、特許文献１から３の構成に示すような、ＤＣモータへの印加電圧をパラメータとする方法に、高圧ＰＷＭ駆動方式を適用した場合は、交流電源を整流平滑した後の波高値にデューティーを乗じた値をパラメータとする必要があるので、使用するマイコンなどのＲＯＭ容量の制限から、分解能が粗くなり、安価に高精度な制御の実現は困難であるという課題があり、安価に高精度な風量一定制御を実現することが要求されている。
【００１１】
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い、モータ個体のばらつきにより、通電位相が遅れ位相や進み位相となる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安価に高精度で一定に制御できるファンモータおよびそれを搭載した電気機器を提供することを目的とする。
【００１２】
【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、この風量指示手段によって指示された各風量で一定運転するために、基準となるＤＣモータの必要な規定回転数と印加電圧の相関関係を示す相関関係記憶手段と、前記ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と印加電圧の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへの印加電圧または電流と運転回転数から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータの構成としたものである。
【００１３】
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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、特性乖離判別手段はＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへの印加電圧または電流と運転回転数から、基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて相関関係補正手段は補正量を決定して補正するので、通電位相がばらついても、ＤＣモータをサービス部品として取り替えても、雰囲気温度変化のない空間において、常に指示風量に対して高精度で一定に制御できるファンモータが得られる。
【００１４】
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で一定運転するために、基準となるＤＣモータの必要な規定回転数と電流の相関関係を示す相関関係記憶手段と、前記ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と電流の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへ印加する等価電圧または電流と運転回転数から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータの構成としたものである。
【００１５】
本発明によれば、ＰＷＭ駆動であるとともに、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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、特性乖離判別手段はＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへ印加する等価電圧または電流と運転回転数から、基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて相関関係補正手段は補正量を決定して補正するので、通電位相がばらついても、ＤＣモータをサービス部品として取り替えても、雰囲気温度変化のない空間において、常に指示風量に対して高精度で一定に制御できるファンモータが得られる。
【００１６】
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で一定運転するために、基準の雰囲気温度時において、基準となるＤＣモータの必要な規定回転数と印加電圧の相関関係を示す相関関係記憶手段と、前記ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果と前記雰囲気温度検出手段の検知した雰囲気温度から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と印加電圧の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへの印加電圧または電流と運転回転数と雰囲気温度から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータの構成としたものである。
【００１７】
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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、特性乖離判別手段はＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへの印加電圧または電流と運転回転数と雰囲気温度から、基準となるＤＣモータとの特性乖離を判別し、その判別結果と雰囲気温度の温度変化に対応した温度変化分を併せて相関関係補正手段は補正量を決定して補正しながら制御するので、通電位相がばらついても、ＤＣモータをサービス部品として取り替えても、春夏秋冬、昼夜に関係なく、常に指示風量に対して高精度で一定に制御できるファンモータが得られる。
【００１８】
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で一定運転するために、基準の雰囲気温度時において、基準となるＤＣモータの必要な規定回転数と電流の相関関係を示す相関関係記憶手段と、前記ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果と前記雰囲気温度検出手段の検知した雰囲気温度から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と電流の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへ印加する等価電圧または電流と運転回転数と雰囲気温度から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータの構成としたものである。
【００１９】
本発明によれば、ＰＷＭ駆動であるとともに、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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、特性乖離判別手段はＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへ印加する等価電圧または電流と運転回転数と雰囲気温度から、基準となるＤＣモータとの特性乖離を判別し、その判別結果と雰囲気温度の温度変化に対応した温度変化分を併せて相関関係補正手段は補正量を決定して補正しながら制御するので、通電位相がばらついても、ＤＣモータをサービス部品として取り替えても、春夏秋冬、昼夜に関係なく、常に指示風量に対して高精度で一定に制御できるファンモータが得られる。
【００２０】
また他の手段は、特性乖離判別手段はＤＣモータへの所定の電流または電圧を２値供給することを特徴とするファンモータの構成としたものである。
【００２１】
本発明によれば、高負荷時と低負荷時にて特性の乖離を把握できることとなるので、より一層精度の高い風量一定制御を実現できるファンモータが得られる。
【００２２】
また他の手段は、特性乖離判別手段はＤＣモータを所定の回転数で略一定運転し、その時の前記ＤＣモータへ印加する等価電圧と電流から、基準となるＤＣモータとの特性乖離を判別することを特徴とするファンモータの構成としたものである。
【００２３】
本発明によれば、ＰＷＭ駆動であっても、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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、特性乖離判別手段はＤＣモータを所定の回転数で略一定運転し、その時の前記ＤＣモータへ印加する等価電圧と電流から、基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて相関関係補正手段は補正量を決定して補正するので、通電位相がばらついても、ＤＣモータをサービス部品として取り替えても、常に指示風量に対して高精度で一定に制御できるファンモータが得られる。
【００２４】
また他の手段は、特性乖離判別手段はＤＣモータを所定の回転数で略一定運転し、その時のＤＣモータへ印加する等価電圧と電流と雰囲気温度から、基準となるＤＣモータとの特性乖離を判別することを特徴とするファンモータの構成としたものである。
【００２５】
本発明によれば、ＰＷＭ駆動であっても、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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、特性乖離判別手段はＤＣモータを所定の回転数で略一定運転し、その時の前記ＤＣモータへ印加する等価電圧と電流から、基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて相関関係補正手段は補正量を決定して補正するので、通電位相がばらついても、ＤＣモータをサービス部品として取り替えても、春夏秋冬、昼夜に関係なく、常に指示風量に対して高精度で一定に制御できるファンモータが得られる。
【００２６】
また他の手段は、特性乖離判別手段はＤＣモータを所定の２つの回転数で略一定運転することを特徴とするファンモータの構成としたものである。
【００２７】
本発明によれば、高負荷時と低負荷時にて特性の乖離を把握できることとなるので、より一層精度の高い風量一定制御を実現できるファンモータが得られる。
【００２８】
また他の手段は、特性乖離判別手段は周期的に動作することを特徴とするファンモータの構成としたものである。
【００２９】
本発明によれば、特性乖離判別手段がＤＣモータの特性面の状態を周期的に把握するので、軸受けなど物理的な要素が経年変化などによってモータ特性に影響を与えても、ＤＣモータをサービス部品として取り替えても、常に指示風量に対して高精度で一定に制御できるファンモータが得られる。
【００３０】
【発明の実施の形態】
本発明の請求項１記載の発明は、風量指示手段によって指示された各風量で一定運転するために、基準となるＤＣモータの必要な規定回転数と印加電圧の相関関係を示す相関関係記憶手段と、ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と印加電圧の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへの印加電圧または電流と運転回転数から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータの構成としたものであり、特性乖離判別手段はＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへの印加電圧または電流と運転回転数から、基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて相関関係補正手段は補正量を決定して補正するという作用を有する。
【００３１】
また、風量指示手段によって指示された各風量で一定運転するために、基準となるＤＣモータの必要な規定回転数と電流の相関関係を示す相関関係記憶手段と、ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と電流の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへ印加する等価電圧または電流と運転回転数から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータの構成としたものであり、特性乖離判別手段はＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへの印加電圧または電流と運転回転数から、基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて相関関係補正手段は補正量を決定して補正するという作用を有する。
【００３２】
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で一定運転するために、基準の雰囲気温度時において、基準となるＤＣモータの必要な規定回転数と印加電圧の相関関係を示す相関関係記憶手段と、前記ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果と前記雰囲気温度検出手段の検知した雰囲気温度から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と印加電圧の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへの印加電圧または電流と運転回転数と雰囲気温度から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータの構成としたものであり、特性乖離判別手段はＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへの印加電圧または電流と運転回転数と雰囲気温度から、基準となるＤＣモータとの特性乖離を判別し、その判別結果と雰囲気温度の基準温度との差に対応した温度変化分を併せて相関関係補正手段は補正量を決定して補正しながら制御するという作用を有する。
【００３３】
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で一定運転するために、基準の雰囲気温度時において、基準となるＤＣモータの必要な規定回転数と電流の相関関係を示す相関関係記憶手段と、前記ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果と前記雰囲気温度検出手段の検知した雰囲気温度から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と電流の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへ印加する等価電圧または電流と運転回転数と雰囲気温度から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータの構成としたものであり、特性乖離判別手段はＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへの印加電圧または電流と運転回転数と雰囲気温度から、基準となるＤＣモータとの特性乖離を判別し、その判別結果と雰囲気温度の基準温度との差に対応した温度変化分を併せて相関関係補正手段は補正量を決定して補正しながら制御するという作用を有する。
【００３４】
また、特性乖離判別手段はＤＣモータへの所定の電流または電圧を２値供給することを特徴とするファンモータの構成としたものであり、高負荷時と低負荷時にて特性の乖離を把握できるという作用を有する。
【００３５】
また、特性乖離判別手段はＤＣモータを所定の回転数で略一定運転し、その時の前記ＤＣモータへ印加する等価電圧と電流から、基準となるＤＣモータとの特性乖離を判別することを特徴とするファンモータの構成としたものであり、特性乖離判別手段はＤＣモータを所定の回転数で略一定運転し、その時の前記ＤＣモータへ印加する等価電圧と電流から、基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて相関関係補正手段は補正量を決定して補正するという作用を有する。
【００３６】
また、特性乖離判別手段はＤＣモータを所定の回転数で略一定運転し、その時のＤＣモータへ印加する等価電圧と電流と雰囲気温度から、基準となるＤＣモータとの特性乖離を判別することを特徴とするファンモータの構成としたものであり、特性乖離判別手段はＤＣモータを所定の回転数で略一定運転し、その時の前記ＤＣモータへ印加する等価電圧と電流から、基準となるＤＣモータとの特性乖離を判別し、その判別結果と雰囲気温度の基準温度との差に対応した温度変化分を合わせて相関関係補正手段は補正量を決定して補正するという作用を有する。
【００３７】
また、特性乖離判別手段はＤＣモータを所定の２つの回転数で略一定運転することを特徴とするファンモータの構成としたものであり、高負荷時と低負荷時にて特性の乖離を把握できるという作用を有する。
【００３８】
また、特性乖離判別手段は周期的に動作することを特徴とするファンモータの構成としたものであり、特性乖離判別手段がＤＣモータの特性面の状態を周期的に把握するという作用を有する。
【００３９】
以下、本発明の実施例について図１〜図１０を参照しながら説明する。
【００４０】
【実施例】
（実施例１）
図１〜図７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、１８はファンモータ１を内蔵した筐体状の換気装置であり、室内から室内空気を吸い込むための給気口１８ａと、吸い込んだ室内空気を屋外に排気するための排気口１８ｂを開口している。給気ダクト１４ａ、給気口１８ａを介して換気装置１８内のファンモータ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は、排気口１８ｂ、排気ダクト１４ｂを介して建物の壁１５を貫通して屋外に排出される。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６ａとスイッチング素子群６ｂ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（図１はブロック図のためＤＣモータ２内に内蔵した状態では図示せず）。駆動ロジック回路６ａはホールＩＣ５の信号出力を基に、スイッチング素子群６ｂ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、１９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。７はＤＣモータ２の駆動電流を検知する電流検出手段で、１２は基準温度時において基準となるＤＣモータが風量指示手段１３にて指示された各風量毎に、その指示された風量で一定運転するために必要な回転数を規定回転数として複数の印加電圧に対応させて記憶する相関関係記憶手段である。８は相関関係補正手段で、ＤＣモータ２において、基準となるＤＣモータとの特性の乖離を判別して、その特性乖離分を対象にして相関関係を補正する特性乖離判別手段１０と、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の温度差に応じて相関関係を補正する温度補正手段１６と、特性乖離判別結果を記憶する特性乖離記憶手段１０ａより構成される。１１は風量制御手段で、相関関係記憶手段１２から指示風量と印加電圧に対応した基準の規定回転数を選定し、選定した規定回転数を相関関係補正手段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。そして、特性乖離判別手段１０の実施動作は換気装置１８の設置時にテストモードにて行い、実施した結果は特性乖離記憶手段１０ａに記憶する構成である。
【００４１】
上記構成において、換気装置１８の設置時にテストモードの実施によって、今回搭載されたＤＣモータ２の特性が基準となるＤＣモータの特性と比べて、どの程度特性が乖離しているのか把握する。その動作は特性乖離判別手段１０が、ＤＣモータ２に所定電圧を印加する指示を出力し、ファンモータ１を運転する。そして、運転回転数検出手段９がＤＣモータ２の回転が、ほぼ安定したことを確認するとともに、現在の運転回転数を検出し、電流検出手段７がＤＣモータ２の駆動電流を検出する。そして、雰囲気温度検出手段４によってファンモータ１が吸い込んだ空気の温度と基準温度との差を基に、検出した運転回転数と電流を基準温度時の値に補正する。この補正の相関図の一例を図４に示す。図に示すように、検出した現在の雰囲気温度が基準温度よりも高い場合は、その温度差に応じて図４の相関を比例配分して、回転数をプラス補正し、電流はマイナス補正する。逆に検出した現在の雰囲気温度が基準温度よりも低い場合は、同様にして回転数をマイナス補正し、電流はプラス補正して基準温度時への温度補正は完了する。次に、図３のモータトルク−回転数，モータトルク−電流特性と、温度補正した回転数と電流から基準のＤＣモータとの特性乖離を把握する。このとき、基準のＤＣモータの電流特性と温度補正した電流とを比較し、基準のＤＣモータの電流特性が示す電流値が、温度補正した電流値よりも低い場合は、今回のＤＣモータ２は転流タイミングが遅れ位相と判断し、電流値の差に応じて相関関係記憶手段１２に記憶された規定回転数をプラス補正する補正係数を決定する。逆に電流を比較し、基準のＤＣモータの電流特性が示す電流値が、温度補正した電流値よりも高い場合は、今回のＤＣモータ２は転流タイミングが進み位相と判断し、電流値の差に応じて相関関係記憶手段１２に記憶された規定回転数をマイナス補正する補正係数を決定する。そして、決定された補正係数は特性乖離記憶手段１０ａに記憶される。ここで、換気装置１８のテストモードは終了する。次に、通常の運転時では、温度補正手段１６は雰囲気温度検出手段４が検知した雰囲気温度が基準温度よりも高い場合は、規定回転数をプラス補正する補正量を決定し、逆に検知した雰囲気温度が基準温度よりも低い場合は、規定回転数をマイナス補正する補正量を決定する。この時の補正量は検知した雰囲気温度と基準温度との差に応じて決定する。そして、風量指示手段１３によって指示された指示風量と、印加電圧検出手段１９によって検出された印加電圧値をパラメータとして相関関係記憶手段１２から基準の規定回転数を選定し、その選定した規定回転数を、相関関係補正手段８はテストモード時に特性乖離記憶手段１０ａに記憶した特性乖離分の補正係数から求めた特性乖離分補正量と、温度補正手段１６が決定した空気温度の変化に対応した補正量とを併せて補正する。次に、風量制御手段１１は相関関係補正手段８によって補正された規定回転数と、運転回転数検出手段９が検出した運転回転数とが一致するようにＤＣモータ２への印加電圧を昇圧あるいは降圧を繰り返して制御するものである。ここで、図２にはＤＣモータの特性乖離の影響によるファンモータの風量−静圧と風量−回転数と風量−電流特性を示し、図３にはＤＣモータの特性乖離の影響によるモータトルク−回転数とモータトルク−電流特性を示す。図からも明らかなように、遠心型のファンモータにおいて、最大静圧の状態よりも静圧ゼロの状態の方がＤＣモータに対する負荷は重くなるので、製造時のばらつき等による特性乖離は静圧ゼロの状態に近くなれば近くなるほど、ＤＣモータへの電流の差が顕著に現れることとなる。そして、磁石回転子の磁石の磁束量が小さくなればなるほど、静圧ゼロの状態に近くなるほど電流は高くなり、ホールＩＣの実装位置のばらつきにより、通電位相が遅れ位相になればなるほど、静圧ゼロに近くなるにしたがって電流は一段と高くなり、ベアリングなど軸受けの動トルクが小さくなればなるほど、静圧ゼロに近くなるにしたがって電流は高くなり、電機子巻線の抵抗値が小さくなればなるほど、静圧ゼロに近くなるにしたがって電流は若干高くなる。したがって、磁束量が小さいＤＣモータや遅れ位相のＤＣモータや軸受け動トルクの小さいＤＣモータや電機子巻線の抵抗値が小さいＤＣモータを搭載したファンモータは、基準となるＤＣモータを搭載したファンモータに対して、同一指示風量、同一静圧の使用点を低い印加電圧にて達成できることとなるので、相関関係記憶手段１２に記憶された規定回転数をプラス側に補正するか、実際に検知した印加電圧よりも高い値をパラメータとして相関関係記憶手段１２から規定回転数を選定すれば良いことになる。逆に、磁束量が大きいＤＣモータや進み位相のＤＣモータや軸受け動トルクの大きいＤＣモータや電機子巻線の抵抗値が大きいＤＣモータを搭載したファンモータは、基準となるＤＣモータを搭載したファンモータに対して、同一指示風量、同一静圧の使用点には高い印加電圧が必要になるので、相関関係記憶手段１２に記憶された規定回転数をマイナス側に補正するか、実際に検知した印加電圧よりも低い値をパラメータとして相関関係記憶手段１２から規定回転数を選定すれば良いことになる。また、図４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印加電圧時の、風量−静圧と風量−回転数と風量−電流特性を示す。図からも明らかなように、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するか、実際に検知した印加電圧よりも高い値をパラメータとして相関関係記憶手段１２から規定回転数を選定すれば良いことになる。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か、実際に検知した印加電圧よりも低い値をパラメータとして相関関係記憶手段１２から規定回転数を選定すれば良いことになる。
【００４２】
このような本発明の実施例１のファンモータ１および換気装置１８によれば、特性乖離判別手段１０がＤＣモータ２に所定電圧を印加する指示を出力してファンモータ１を運転し、運転回転数検出手段９がＤＣモータ２の現在の運転回転数を検出し、電流検出手段７がＤＣモータ２の駆動電流を検出する。そして、雰囲気温度検出手段４によってファンモータ１が吸い込んだ空気の温度と基準温度との差を基に、検出した運転回転数と電流を基準温度時の値に補正する。そして、基準のＤＣモータの電流特性と温度補正した電流とを比較し、基準のＤＣモータの電流特性が示す電流値が、温度補正した電流値よりも低い場合は、今回のＤＣモータ２は転流タイミングが遅れ位相と判断し、電流値の差に応じて相関関係記憶手段１２に記憶された規定回転数をプラス補正する補正係数を決定する。逆に電流を比較し、基準のＤＣモータの電流特性が示す電流値が、温度補正した電流値よりも高い場合は、今回のＤＣモータ２は転流タイミングが進み位相と判断し、電流値の差に応じて相関関係記憶手段１２に記憶された規定回転数をマイナス補正する補正係数を決定することによって、特性乖離判別手段１０がＤＣモータの製造時における抵抗値や、磁石の磁束量や、ホールＩＣの実装位置などのばらつきによる基準のＤＣモータとの特性乖離分を把握して、相関関係補正手段８が特性乖離分と雰囲気温度変化分をあわせて規定回転数を補正するので、ＤＣモータ２の特性ばらつきや雰囲気温度の変化の影響を受けることなく、高精度で指示風量にて一定運転できるファンモータおよび換気装置が得られる。
【００４３】
なお、実施例１では、雰囲気温度検出手段４を設けて、回転数と電流を温度補正したが、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、雰囲気温度を検出することなく、電流と回転数から基準のＤＣモータとの特性乖離を判別して相関関係を補正すれば良く、雰囲気温度検出手段を設けなくても、指示風量に対して一定で運転するという作用効果に差異を生じない。
【００４４】
また、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、その場合はＤＣモータ２の製造条件などきめ細かく管理して製造しなくても、指示風量に対して一定で運転するという作用効果に差異を生じない。
【００４５】
また、相関関係記憶手段１２から選定した回転数を直接加・減算して規定回転数を補正する制御方法としたが、参照する印加電圧をシフトして、規定回転数を選定する方法としても良く、指示風量に対して一定で運転するという作用効果に差異を生じない。
【００４６】
また、相関関係記憶手段１２は基準温度時において基準となるＤＣモータが風量指示手段１３にて指示された各風量毎に、その指示された風量で一定運転するために必要な回転数を規定回転数として複数の印加電圧に対応させて記憶したが、規定回転数に対応させて必要な印加電圧を記憶しても良く、さらには、印加電圧と規定回転数の関係式を記憶し、印加電圧から規定回転数を求める構成や、回転数をパラメータとして必要な印加電圧を求める構成としても良く、その作用効果に差異を生じない。
【００４７】
また、特性乖離を判別するときに、検出した回転数と電流を基準の温度時の値に補正したが、基準のＤＣモータの特性を雰囲気温度検出手段が検出した雰囲気温度時の特性に補正しても良く、その作用効果に差異を生じない。
【００４８】
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ー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、デューティーをそのまま電圧として制御すれば良い。
【００４９】
また、特性乖離判別手段１０を動作するテストモードを、例えば１年に１回実施するなど、周期的に動作させることによって、ＤＣモータ２に使用した軸受けグリス量の若干の減少による動トルクの減少や、グリス量の大幅な減少や、グリスの劣化等による動トルクの増加など、物理的な要因によりＤＣモータの特性が初期状態から変化しても、その変化を検知できるので、恒久的に指示風量に対して一定制御ができるファンモータおよび換気装置が得られる。
【００５０】
また、矩形波通電するＤＣモータにあっては、電流検出手段７はピーク電流を検出する構成としても良く、その作用効果に差異を生じない。
【００５１】
また、特性乖離判別手段１０の動作時にＤＣモータ２への印加電圧の値は、ファンモータ１あるいは換気装置１８が許容される騒音から決定すればよいが、その印加電圧は高ければ高いほど、特性乖離を詳細に認識できることとなる。また、高負荷時と低負荷時の２種類の印加電圧にて判断するようにすれば、さらに特性乖離を詳細に認識できることとなる。
【００５２】
また、特性乖離判別手段１０はＤＣモータ２に所定の印加電圧を供給して特性乖離を把握する構成としたが、所定の電流を供給する構成としても良く、その場合はＤＣモータ２に印加される等価電圧と回転数を検出し、図７に基づいて検出した等価電圧と運転回転数を温度補正し、所定の印加電圧を供給した場合と同様にしてＤＣモータ２への温度補正した等価電圧と回転数から基準のＤＣモータとの特性乖離を把握し、相関関係を補正することによって、指示風量に対して一定で運転するという作用効果に差異を生じない。
【００５３】
（実施例２）
図８〜図１０に示すように、２２は基準温度時において基準となるＤＣモータが風量指示手段１３にて指示された各風量毎に、その指示された風量で一定運転するために必要な回転数を複数の電流に対応して記憶する相関関係記憶手段で、２１は相関関係補正手段であって、ＤＣモータ２において、基準となるＤＣモータとの特性の乖離を判別して、その特性乖離分を対象にして相関関係を補正する特性乖離判別手段２０と、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の温度差に応じて相関関係を補正する温度補正手段１６と、特性乖離判別結果を記憶する特性乖離記憶手段２０ａより構成される。その他の構成は実施例１と同一であり、詳細な説明は省略する。
【００５４】
上記構成において、換気装置１８の設置時にテストモードの実施によって、今回搭載されたＤＣモータ２の特性が基準となるＤＣモータの特性と比べて、どの程度特性が乖離しているのか把握する。その動作は特性乖離判別手段２０が、ＤＣモータ２を所定の回転数になるよう略一定回転させ、印加電圧検出手段１９がＤＣモータ２に印加されている等価電圧を検出し、電流検出手段７がＤＣモータ２の駆動電流を検出する。そして、雰囲気温度検出手段４によってファンモータ１が吸い込んだ空気の温度と基準温度との差を基に、検出した印加電圧と電流を基準温度時の値に補正する。この補正の相関図の一例を図９に示す。図に示すように、検出した現在の雰囲気温度が基準温度よりも高い場合は、その温度差に応じて図９の相関を比例配分して、印加電圧をマイナス補正するとともに、電流もマイナス補正する。逆に検出した現在の雰囲気温度が基準温度よりも低い場合は、同様にして印加電圧、電流とともにプラス補正して基準温度時への温度補正は完了する。次に、温度補正した印加電圧と電流から基準のＤＣモータとの特性乖離を実施例１と同様にして把握する。このとき、温度補正した印加電圧値からは換気装置１８の負荷状態を概略把握し、基準のＤＣモータの電流特性と温度補正した電流とを比較し、基準のＤＣモータの電流特性が示す電流値が、温度補正した電流値よりも低い場合は、今回のＤＣモータ２は転流タイミングが遅れ位相と判断し、電流値の差に応じて相関関係記憶手段２２に記憶された規定回転数をプラス補正する補正係数を決定する。逆に電流を比較し、基準のＤＣモータの電流特性が示す電流値が、温度補正した電流値よりも高い場合は、今回のＤＣモータ２は転流タイミングが進み位相と判断し、電流値の差に応じて相関関係記憶手段２２に記憶された規定回転数をマイナス補正する補正係数を決定する。そして、決定された補正係数は特性乖離記憶手段２０ａに記憶される。ここで、換気装置１８のテストモードは終了する。次に、通常の運転時では、温度補正手段１６は雰囲気温度検出手段４が検知した雰囲気温度が基準温度よりも高い場合は、規定回転数をプラス補正する補正量を決定し、逆に検知した雰囲気温度が基準温度よりも低い場合は、規定回転数をマイナス補正する補正量を決定する。この時の補正量は検知した雰囲気温度と基準温度との差に応じて決定する。そして、風量指示手段１３によって指示された指示風量と、電流検出手段７によって検出された電流値をパラメータとして相関関係記憶手段２２から基準の規定回転数を選定し、その選定した規定回転数を、相関関係補正手段２１はテストモード時に特性乖離記憶手段２０ａに記憶した特性乖離分の補正係数から求めた特性乖離分補正量と、温度補正手段１６が決定した空気温度の変化に対応した補正量とを併せて補正する。次に、風量制御手段１１は相関関係補正手段２１によって補正された規定回転数と、運転回転数検出手段９が検出した運転回転数とが一致するようにＤＣモータ２への印加電圧を昇圧あるいは降圧を繰り返して制御するものである。
【００５５】
このような本発明の実施例２のファンモータ１および換気装置１８によれば、特性乖離判別手段２０がＤＣモータ２に電圧を印加する指示を出力してファンモータ１を運転し、ＤＣモータ２が所定の回転数にて略一定運転するよう電圧調整を行い、運転回転数検出手段９がＤＣモータ２の現在の運転回転数が所定の回転数になったことを確認した後、印加電圧検出手段１９がＤＣモータ２に印加されている等価電圧を検出し、電流検出手段７がＤＣモータ２の駆動電流を検出する。そして、雰囲気温度検出手段４によってファンモータ１が吸い込んだ空気の温度と基準温度との差を基に、検出した運転回転数と電流を基準温度時の値に補正する。そして、基準のＤＣモータの電流特性と温度補正した電流とを比較し、基準のＤＣモータの電流特性が示す電流値が、温度補正した電流値よりも低い場合は、今回のＤＣモータ２は転流タイミングが遅れ位相と判断し、電流値の差に応じて相関関係記憶手段２２に記憶された規定回転数をプラス補正する補正係数を決定する。逆に電流を比較し、基準のＤＣモータの電流特性が示す電流値が、温度補正した電流値よりも高い場合は、今回のＤＣモータ２は転流タイミングが進み位相と判断し、電流値の差に応じて相関関係記憶手段２２に記憶された規定回転数をマイナス補正する補正係数を決定することによって、特性乖離判別手段２０がＤＣモータの製造時における抵抗値や、磁石の磁束量や、ホールＩＣの実装位置などのばらつきによる基準のＤＣモータとの特性乖離分を把握して、相関関係補正手段２１が特性乖離分と雰囲気温度変化分をあわせて規定回転数を補正するので、ＤＣモータ２の特性ばらつきや雰囲気温度の変化の影響を受けることなく、高精度で指示風量にて一定運転できるファンモータおよび換気装置が得られる。
【００５６】
また、相関関係記憶手段２２は電流をパラメータとして記憶しているので、ＤＣモータ２の駆動方式が高圧ＰＷＭ駆動であっても、整流平滑後の波高値にデューティーを乗じた値をパラメータとしないので、使用するマイコンなどの１ビットあたりの分解能が粗くなるのを抑制することから、高精度で指示風量にて一定運転できるファンモータおよび換気装置が得られる。
【００５７】
なお、実施例２では、雰囲気温度検出手段４を設けて、回転数と電流を温度補正したが、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、雰囲気温度を検出することなく、電流と回転数から基準のＤＣモータとの特性乖離を判別して相関関係を補正すれば良く、雰囲気温度検出手段を設けなくても、指示風量に対して一定で運転するという作用効果に差異を生じない。
【００５８】
また、相関関係記憶手段２２から選定した回転数を直接加・減算して規定回転数を補正する制御方法としたが、参照する電流をシフトして、規定回転数を選定する方法としても良く、指示風量に対して一定で運転するという作用効果に差異を生じない。
【００５９】
また、相関関係記憶手段２２は基準温度時において基準となるＤＣモータが風量指示手段１３にて指示された各風量毎に、その指示された風量で一定運転するために必要な回転数を規定回転数として複数の電流に対応させて記憶したが、規定回転数に対応させて必要な電流を記憶しても良く、さらには、電流と規定回転数の関係式を記憶し、電流から規定回転数を求める構成や、回転数をパラメータとして必要な電流を求める構成としても良く、その作用効果に差異を生じない。
【００６０】
また、特性乖離を判別するときに、検出した電圧と電流を基準の温度時の値に補正したが、基準のＤＣモータの特性を雰囲気温度検出手段が検出した雰囲気温度時の特性に補正しても良く、その作用効果に差異を生じない。
【００６１】
また、特性乖離判別手段２０の動作時にＤＣモータ２の所定の回転数は、ファンモータ１あるいは換気装置１８が許容される騒音から決定すればよいが、その印加電圧は高ければ高いほど、特性乖離を詳細に認識できることとなる。また、高負荷時と低負荷時の２種類の回転数にて判断するようにすれば、さらに特性乖離を詳細に認識できることとなる。
【００６２】
【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、基準となるＤＣモータの必要な規定回転数と印加電圧の相関関係を示す相関関係記憶手段を設け、特性乖離判別手段がＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへの印加電圧または電流と運転回転数から、基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて相関関係補正手段は補正量を決定することによって、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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、ＤＣモータをサービス部品として取り替えても、雰囲気温度変化のない空間において、常に指示風量に対して高精度で一定に制御できるファンモータおよび換気装置が得られる。
【００６３】
また、基準となるＤＣモータの必要な規定回転数と電流の相関関係を示す相関関係記憶手段を設け、特性乖離判別手段がＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへ印加する等価電圧または電流と運転回転数から、基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することによって、ＰＷＭ駆動であるとともに、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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、ＤＣモータをサービス部品として取り替えても、雰囲気温度変化のない空間において、常に指示風量に対して高精度で一定に制御できるファンモータおよび換気装置が得られる。
【００６４】
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と、基準の雰囲気温度時において、基準となるＤＣモータの必要な規定回転数と印加電圧の相関関係を示す相関関係記憶手段を設け、特性乖離判別手段がＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへの印加電圧または電流と運転回転数と雰囲気温度から、基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて相関関係補正手段は補正量を決定することによって、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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、ＤＣモータをサービス部品として取り替えても、春夏秋冬、昼夜に関係なく、常に指示風量に対して高精度で一定に制御できるファンモータおよび換気装置が得られる。
【００６５】
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と、基準の雰囲気温度時において、基準となるＤＣモータの必要な規定回転数と電流の相関関係を示す相関関係記憶手段を設け、特性乖離判別手段がＤＣモータへ所定の電流または電圧を供給し、その時のＤＣモータへ印加する等価電圧または電流と運転回転数と雰囲気温度から、基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することによって、ＰＷＭ駆動であるとともに、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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、ＤＣモータをサービス部品として取り替えても、春夏秋冬、昼夜に関係なく、常に指示風量に対して高精度で一定に制御できるファンモータおよび換気装置が得られる。
【００６６】
また、特性乖離判別手段はＤＣモータへの所定の電流または電圧を２値供給することによって、高負荷時と低負荷時にて特性の乖離を把握できることとなるので、より一層精度の高い風量一定制御を実現できるファンモータおよび換気装置が得られる。
【００６７】
また、特性乖離判別手段はＤＣモータを所定の回転数で略一定運転し、その時のＤＣモータへ印加する等価電圧と電流から、基準となるＤＣモータとの特性乖離を判別することによって、ＰＷＭ駆動であっても、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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、ＤＣモータをサービス部品として取り替えても、常に指示風量に対して高精度で一定に制御できるファンモータおよび換気装置が得られる。
【００６８】
また、特性乖離判別手段はＤＣモータを所定の回転数で略一定運転し、その時のＤＣモータへ印加する等価電圧と電流と雰囲気温度から、基準となるＤＣモータとの特性乖離を判別することによって、ＰＷＭ駆動であっても、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て通電相を切り替え、その通電位相が誘起電圧位相に対して、遅れ位相や進み位相となるＤＣモータを搭載しても、ＤＣモータをサービス部品として取り替えても、春夏秋冬、昼夜に関係なく、常に指示風量に対して高精度で一定に制御できるファンモータが得られる。
【００６９】
また、特性乖離判別手段はＤＣモータを所定の２つの回転数で略一定運転することによって、高負荷時と低負荷時にて特性の乖離を把握できることとなるので、より一層精度の高い風量一定制御を実現できるファンモータおよび換気装置が得られる。
【００７０】
また、特性乖離判別手段は周期的に動作することによって、ＤＣモータに使用した軸受けグリス量の若干の減少による動トルクの減少や、グリス量の大幅な減少や、グリスの劣化等による動トルクの増加など、物理的な要因によりＤＣモータの特性が初期状態から変化しても、その変化を検知できるので、恒久的に指示風量に対して一定制御が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】同ファンモータに搭載するＤＣモータへの印加電圧を固定した場合の特性乖離による風量−静圧と風量−回転数と風量−電流特性を示すグラフ
【図３】同ファンモータに搭載するＤＣモータへの印加電圧を固定した場合の特性乖離によるモータトルク−回転数とモータトルク−電流特性を示すグラフ
【図４】同ファンモータの雰囲気温度変化時のＤＣモータへの印加電圧を固定した場合の風量−静圧と風量−回転数と風量−電流特性を示すグラフ
【図５】同ファンモータにおける相関関係記憶手段の記憶内容の一例を示す表を表す図
【図６】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７】同ファンモータの雰囲気温度変化時におけるＤＣモータの電流を固定した場合の風量−静圧と風量−電圧と風量−電流特性を示すグラフ
【図８】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９】同ファンモータの雰囲気温度変化時におけるＤＣモータの回転数を固定した場合の風量−静圧と風量−電圧と風量−電流特性を示すグラフ
【図１０】同ファンモータに搭載するＤＣモータの特性がばらついた時の回転数を固定した場合における風量−静圧と風量−電圧と風量−電流特性を示すグラフ
【図１１】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
２　　　ＤＣ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
６ａ　　駆動ロジック回路
６ｂ　　スイッチング素子群
７　　　電流検出手段
８　　　相関関係補正手段
９　　　運転回転数検出手段
１０　　特性乖離判別手段
１０ａ　特性乖離記憶手段
１１　　風量制御手段
１２　　相関関係記憶手段
１３　　風量指示手段
１４ａ　給気ダクト
１４ｂ　排気ダクト
１５　　壁
１６　　温度補正手段
１７　　電機子巻線
１８　　換気装置
１８ａ　給気口
１８ｂ　排気口
１９　　印加電圧検出手段
２０　　特性乖離半別手段
２１　　相関関係補正手段
２２　　相関関係記憶手段[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention mainly includes a ventilator for exhaust and air supply such as a range hood or a ceiling embedded type, a water heater, a dryer, an air purifier, a fan motor mounted on a fan filter unit, and a fan motor mounted thereon. It relates to electrical equipment.
[0002]
[Prior art]
In recent years, in the case of range hoods and ceiling-mounted ventilators, the power consumption has been reduced due to higher efficiency, and the effects of pressure loss due to the duct piping configuration, external wind pressure, and changes in pressure loss due to clogging of filters, etc. There is a need for a fan motor with good controllability that allows ventilation with an optimal air flow according to the state of cooking and the state of the living room without receiving the air. In addition, with the increase in ventilation for 24 hours, a fan motor with low noise and low power consumption is required, and a DC motor has been mounted from an induction motor for higher efficiency. Further, the number of magnetic poles of the magnet rotor has been increased from four to eight. In the case of a motor having a high output exceeding 25 W, in order to reduce the torque ripple / torque change rate and suppress the generation of noise and vibration, it is also necessary to carry out energization control with an increased conduction angle. Instead of detecting the magnetic pole position of the magnet rotor by detecting the zero cross of the induced voltage, a method of detecting the magnetic pole position of the magnet rotor using a Hall IC and switching the energized phase is adopted. . In the case of such a DC motor, a Hall IC is mounted and soldered on the printed circuit board, a certain gap is provided from the magnet rotor, and the printed circuit board is mounted so that the leakage magnetic flux of the magnet can be detected by the Hall IC. The structure is such that it is attached to the stator inside the DC motor. Further, in the case of a motor having an output of 25 W or less, in order to reduce the size of the control circuit, a system using a DC motor having a motor drive circuit built in the motor has been increasing. In such a case, a Hall IC, a logic circuit for switching the energized phase to the armature winding based on the output signal of the Hall IC, and a general-purpose drive IC with a built-in switching element are mounted and soldered on a printed circuit board. It has a DC motor structure in which a printed circuit board is attached to a stator inside the DC motor so that a certain amount of gap is provided from the magnet rotor and the leakage magnetic flux of the magnet can be detected by the Hall IC. There is a need for optimal air volume control with a fan motor equipped with a DC motor incorporating a magnetic pole detection element such as a Hall IC.
[0003]
Conventionally, as examples of this type of fan motor, those disclosed in Patent Literatures 1 to 3 are known. The configuration of the fan motor includes a DC motor, and a rotation speed detecting means for detecting an operation rotation speed of the fan motor and a fan. An applied voltage detecting means for detecting an applied voltage to the motor; and a specified rotation number storage means for storing a specified rotation number required for a constant operation with respect to the indicated airflow in correspondence with a plurality of applied voltages. The specified number of revolutions required at the time of the applied voltage detected by the detecting means is selected from the specified number of revolutions storage means, and the applied voltage is increased or decreased so that the operating number of revolutions detected by the number of revolutions detecting means matches the selected specified number of revolutions. This is the configuration of the fan motor.
[0004]
Further, a configuration disclosed in Patent Document 4 is known, and its configuration is to detect input power to a three-phase induction motor when an air blower and an air blower are actually operated at a predetermined reference rotational speed, and to obtain the power in advance. Further, the relationship between the amount of blown air and the input power at the reference rotation speed of the blower / discharger is calculated by calculating the operating airflow from a functional expression utilizing the fact that the efficiency of the three-phase induction motor and the fan efficiency of the blower / air blower are known. The rotation speed at which a desired air flow rate is obtained is calculated from the functioning equation based on the supplied air flow rate, and is controlled.
[0005]
Further, a configuration disclosed in Patent Document 5 is known, and the configuration is such that a fan motor equipped with a DC motor is started at a constant current, the operating speed at that time is detected, and the load of the ventilation fan is detected from the operating speed. The setting conditions are searched for, and the set rotation speed of the fan motor corresponding to the set airflow is obtained based on the searched load amount, and control is performed so that the set rotation speed matches the operation rotation speed while varying the voltage (at this time, The current value is not a control target).
[0006]
[Patent Document 1]
JP-A-5-146189
[Patent Document 2]
JP-A-5-223091
[Patent Document 3]
JP-A-8-140390
[Patent Document 4]
JP-A-62-162791
[Patent Document 5]
JP-A-8-152165
[0007]
[Problems to be solved by the invention]
According to such a conventional fan motor, in the configurations of Patent Literatures 1 to 3, as shown in Patent Literature 5, current is supplied to an armature winding of a DC motor in order to increase efficiency and reduce vibration. When the phase switching is performed based on the signal output of the Hall IC, the mounting of the Hall IC on the printed circuit board is displaced by 0.2 mm to 0.3 mm (on a plane) even if the mounting accuracy of the mounting machine is high. In addition, since the amount of the adhesive applied at the time of mounting also varies, the gap between the magnet and the Hall IC varies, causing a difference in the signal change of the Hall IC. Further, the sensor sensitivity of the Hall IC also has a variation of ± 20 mT. When such variations are combined, in the case of a DC motor having a magnet outer diameter of 50 mm and the number of magnet poles of 8, the energizing phase with respect to the induced voltage phase is represented by an electrical angle. The applied voltage and current required to output the same torque and rotational speed greatly differ due to the variation in the conduction phase. In general, when the commutation timing is delayed and the energization phase is a delayed phase, the applied voltage and current for outputting the same torque and rotation speed are also high, and conversely, when the energization phase is advanced, Both the applied voltage and the current are reduced. Here, FIG. 11 shows the air volume-static pressure and air volume-rotational speed characteristics of the conventional fan motor in which the energizing phase is the leading phase and in the lag phase motor when the same applied voltage is applied. As shown in the figure, at the same commanded air volume and the same applied voltage, the rotation speed of a motor having a delayed conduction phase is higher than that of a motor having a leading phase. Therefore, since the table of the applied voltage to the DC motor and the specified rotation speed with respect to the indicated airflow differs depending on the difference in the energization phase, when the table is created with the DC motor centered on the energization phase, the energization phase is delayed. Increases the voltage applied to the DC motor in order to make the rotation speed the same as the specified rotation speed. Since the voltage applied to the DC motor is reduced in order to make the same as the above, there is a problem that the air volume is greatly reduced. In addition, in order to realize the 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. It is required to realize high-accuracy constant airflow control with a versatile configuration.
[0008]
Further, in the air flow control method for the blower / discharger disclosed in Patent Literature 4, the inflow angle, the inflow position, and the degree of vortex generation of the air with respect to the fan blades change in the fan motor due to a change in static pressure or air temperature. However, the fan efficiency becomes non-linear and is not easily known. In addition, the fan load (torque), the magnet temperature, and the change in the winding resistance change the copper loss, iron loss, and mechanical loss ratio of the motor. However, since its absolute value changes, the motor efficiency also becomes non-linear and is not easily known. Even at room temperature, it is difficult to realize constant air volume control with the disclosed contents, and it is difficult to achieve uniform control of each product. In addition to the specifications, there is a problem that high-accuracy air volume control cannot be performed. Therefore, it is required to realize high-accuracy air volume constant control without achieving uniform control specifications for each product.
[0009]
Further, in the air volume control device for a ventilation fan disclosed in Patent Document 5, since the installation conditions such as the pressure loss conditions of the duct pipe and the like are estimated based on only the rotation speed under a constant current at a constant time, the estimation is performed. At times, it is very likely that the load conditions will be incorrectly determined to be different from the actual conditions due to changes in the specific air weight due to changes in the air temperature or the influence of outside wind, etc. there were. Further, even if the load condition at the time of estimation can be accurately estimated, since the detection of the load condition is only one point at that time, the opening / closing state of the door in the living room and the air temperature are different from those at the time of estimation. Under the environment, since the air volume is controlled to be different from the set air volume, there is a problem that high-accuracy air volume constant control cannot be performed. In addition, since the magnetic pole position of the magnet rotor is detected by a magnetic pole detecting element such as a Hall IC and the energized phase is switched, there is the same problem as in Patent Documents 1 to 3 described above, and the air flow rate is high and the accuracy is high. It is required to realize the control with a versatile configuration.
[0010]
In recent years, the DC motor of the high-voltage PWM drive system has been increasing, and thus the high-voltage PWM drive system has been applied to a method using the voltage applied to the DC motor as a parameter as shown in the configurations of Patent Documents 1 to 3. In this case, the value obtained by multiplying the duty factor by the peak value after rectifying and smoothing the AC power supply must be used as a parameter. Is difficult to realize, and it is required to realize high-precision constant air volume control at low cost.
[0011]
The present invention solves such a conventional problem, in which the energization switching to the armature winding is performed based on the signal output of the Hall IC, and the energization phase is delayed or advanced due to variation in the individual motor. It is an object of the present invention to provide a fan motor which can control the air flow inexpensively and precisely with a high accuracy with respect to the instructed air flow even if the fan motor has a DC motor mounted thereon, and an electric device equipped with the fan motor.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, a fan motor according to the present invention is a fan motor equipped with a DC motor, wherein the position detection unit detects a magnetic pole position of a magnet rotor of the DC motor; Power supply control means for controlling power supply to the plurality of armature windings of the DC motor, rotation number detection means for detecting an operation rotation number of the DC motor from a signal output of the position detection means, Air volume instructing means for instructing the operating air volume, and correlation storage means for indicating a correlation between a required specified number of rotations of a DC motor as a reference and an applied voltage in order to perform a constant operation at each air volume instructed by the air volume instructing means. A characteristic difference determining means for determining a characteristic difference between the DC motor and the reference DC motor; Correlation correction means for correcting the correlation stored in the stage, and comparing the corrected correlation with the current operating speed and applied voltage actual operation correlation, and using the DC motor so as to be identical. Air flow rate control means for controlling the applied voltage to the DC motor, the characteristic deviation determination means supplies a predetermined current or voltage to the DC motor, from the applied voltage or current to the DC motor and the operating speed at that time, The characteristic deviation from the reference DC motor is determined, and the correlation correction unit determines a correction amount based on the determination result, thereby providing a fan motor.
[0013]
According to the present invention, the energized phase is switched by detecting the magnetic pole position of the magnet rotor using a magnetic pole detecting element such as a Hall IC, and the energized phase is delayed or advanced with respect to the induced voltage phase. Even if the motor is mounted, the characteristic deviation determining means supplies a predetermined current or voltage to the DC motor, and determines the characteristic deviation from the reference DC motor based on the applied voltage or current to the DC motor and the operation speed at that time. Discrimination, and based on the discrimination result, the correlation correction means determines and corrects the correction amount. Therefore, even if the energization phase varies, and even if the DC motor is replaced as a service part, the correlation correction means always keeps in a space where the ambient temperature does not change. A fan motor can be obtained which can be controlled with high accuracy and constant to the indicated airflow.
[0014]
Still another means is a fan motor equipped with a DC motor, a position detecting 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 from the position detecting means. Energization control means for controlling energization of the armature windings, rotation number detection means for detecting the operation rotation number of the DC motor from a signal output of the position detection means, and air volume instruction means for instructing the operation air volume of the fan motor And a correlation storage means for showing a correlation between a required specified rotation speed and a current of a DC motor as a reference in order to perform a constant operation at each air flow instructed by the air flow instructing means, and the DC motor and the reference A characteristic divergence determining means for determining a characteristic difference of the DC motor, and a phase for correcting the correlation stored in the correlation storage means based on the determination result of the characteristic divergence determining means. A relationship correction unit, and a flow rate control unit that controls the applied voltage to the DC motor so as to compare the corrected correlation with the current operation rotation speed and the current operation correlation at the time of actual operation. The characteristic deviation determining means supplies a predetermined current or voltage to the DC motor, and determines a characteristic deviation from the reference DC motor based on an equivalent voltage or current applied to the DC motor and an operation speed at that time. It is configured such that the correlation correction means determines the correction amount based on the result of the determination and determines the correction amount.
[0015]
According to the present invention, in addition to the PWM drive, the energized phase is switched by detecting the magnetic pole position of the magnet rotor using a magnetic pole detecting element such as a Hall IC, and the energized phase is delayed with respect to the induced voltage phase. Even if a DC motor having a leading phase is mounted, the characteristic deviation determination means supplies a predetermined current or voltage to the DC motor, and becomes a reference based on the equivalent voltage or current applied to the DC motor and the operation speed at that time. The characteristic deviation from the DC motor is determined, and the correlation correction means determines and corrects the correction amount based on the determination result. Therefore, even if the energization phase varies, the DC motor is replaced as a service component, the ambient temperature is not changed. In a space where there is no change, it is possible to obtain a fan motor that can always control the indicated airflow with high accuracy and constant.
[0016]
Still another means is a fan motor equipped with a DC motor, a position detecting 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 from the position detecting means. Energization control means for controlling energization of the armature winding, rotation number detection means for detecting the operation rotation number of the DC motor from the signal output of the position detection means, and detection of the ambient temperature at which the fan motor is installed. Atmospheric temperature detecting means, air volume instructing means for instructing the operating air volume of the fan motor, and a DC motor serving as a reference at a standard atmospheric temperature in order to perform a constant operation at each air volume instructed by the air volume instructing device. A correlation storage unit that indicates a correlation between a required specified number of rotations and an applied voltage; and a characteristic difference that determines a characteristic difference between the DC motor and the reference DC motor. Determining means, correlation correction means for correcting the correlation stored in the correlation storage means from the determination result of the characteristic deviation determining means and the ambient temperature detected by the atmospheric temperature detecting means, and the corrected correlation And an air volume control unit that controls the applied voltage to the DC motor so as to compare the current operating rotational speed and the applied voltage during actual operation and controls the applied voltage to be the same. A predetermined current or voltage is supplied to the DC motor, and a characteristic deviation from the reference DC motor is determined from the applied voltage or current to the DC motor, the operating rotation speed, and the ambient temperature at that time. The correlation correction means determines a correction amount based on the correlation value.
[0017]
According to the present invention, the energized phase is switched by detecting the magnetic pole position of the magnet rotor using a magnetic pole detecting element such as a Hall IC, and the energized phase is delayed or advanced with respect to the induced voltage phase. Even if a motor is mounted, the characteristic deviation determination means supplies a predetermined current or voltage to the DC motor, and determines a difference between the reference DC motor and the applied voltage or current to the DC motor at that time, the operating speed and the ambient temperature. The characteristic deviation is determined, and the correlation correction means determines and corrects the correction amount based on the determination result and the temperature change corresponding to the temperature change of the ambient temperature. Even if the motor is replaced as a service component, a fan motor that can always control the indicated airflow with high accuracy and constant regardless of whether it is spring, summer, autumn or winter, day or night can be obtained.
[0018]
Still another means is a fan motor equipped with a DC motor, a position detecting 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 from the position detecting means. Energization control means for controlling energization of the armature winding, rotation number detection means for detecting the operation rotation number of the DC motor from the signal output of the position detection means, and detection of the ambient temperature at which the fan motor is installed. Atmospheric temperature detecting means, air volume instructing means for instructing the operating air volume of the fan motor, and a DC motor serving as a reference at a standard atmospheric temperature in order to perform a constant operation at each air volume instructed by the air volume instructing device. A correlation storage unit for indicating a correlation between a required specified number of rotations and a current; and a characteristic discrepancy judging a characteristic difference between the DC motor and the reference DC motor. Means, a correlation correction means for correcting the correlation stored in the correlation storage means from the determination result of the characteristic deviation determination means and the ambient temperature detected by the atmosphere temperature detecting means, and a corrected correlation. Air flow control means for comparing the current operating rotational speed and the actual operation correlation of the current, and controlling the applied voltage to the DC motor so as to be the same, wherein the characteristic deviation determining means comprises the DC motor. A predetermined current or voltage is supplied to the DC motor, and a characteristic deviation from the reference DC motor is determined based on an equivalent voltage or current applied to the DC motor at that time, an operating rotation speed, and an ambient temperature, and based on the determination result. The correlation correction means determines a correction amount, and is configured as a fan motor.
[0019]
According to the present invention, in addition to the PWM drive, the energized phase is switched by detecting the magnetic pole position of the magnet rotor using a magnetic pole detecting element such as a Hall IC, and the energized phase is delayed with respect to the induced voltage phase. Even if a DC motor having a leading phase is mounted, the characteristic deviation determination means supplies a predetermined current or voltage to the DC motor, and calculates the equivalent voltage or current applied to the DC motor at that time, the operating speed, and the ambient temperature. Since the characteristic deviation from the reference DC motor is determined, and the result of the determination and the temperature change corresponding to the temperature change of the ambient temperature are combined, the correlation correction means determines and corrects the correction amount and performs control while performing correction. Even if the phase varies or the DC motor is replaced as a service component, a fan motor that can always control the indicated airflow with high accuracy and constant, regardless of whether it is spring, summer, autumn or winter, day or night, is obtained. .
[0020]
In another aspect, the characteristic divergence determining means supplies a predetermined current or voltage to the DC motor in a binary manner.
[0021]
According to the present invention, it is possible to grasp the difference between the characteristics at the time of high load and at the time of low load, so that a fan motor capable of achieving more accurate air flow constant control can be obtained.
[0022]
Another means is that the characteristic deviation determining means operates the DC motor at a predetermined rotation speed at a substantially constant speed, and determines a characteristic deviation from a reference DC motor from an equivalent voltage and current applied to the DC motor at that time. This is a configuration of a fan motor characterized by the above.
[0023]
According to the present invention, even in PWM driving, the energized phase is switched by detecting the magnetic pole position of the magnet rotor using a magnetic pole detecting element such as a Hall IC, and the energized phase is delayed with respect to the induced voltage phase. Even if a DC motor having a phase or a leading phase is mounted, the characteristic deviation determining means operates the DC motor at a substantially constant speed at a predetermined rotation speed, and obtains a reference DC from the equivalent voltage and current applied to the DC motor at that time. Since the characteristic deviation from the motor is determined and the correlation correction means determines and corrects the correction amount based on the result of the determination, the indicated airflow is always maintained even if the energization phase varies or the DC motor is replaced as a service component. And a fan motor that can be controlled with high accuracy and constant.
[0024]
Another means is that the characteristic deviation determining means operates the DC motor at a predetermined rotation speed at a substantially constant speed, and determines the characteristic deviation from the reference DC motor based on the equivalent voltage, current, and ambient temperature applied to the DC motor at that time. This is a configuration of a fan motor characterized by discriminating.
[0025]
According to the present invention, even in PWM driving, the energized phase is switched by detecting the magnetic pole position of the magnet rotor using a magnetic pole detecting element such as a Hall IC, and the energized phase is delayed with respect to the induced voltage phase. Even if a DC motor having a phase or a leading phase is mounted, the characteristic deviation determining means operates the DC motor at a substantially constant speed at a predetermined rotation speed, and obtains a reference DC from the equivalent voltage and current applied to the DC motor at that time. Since the characteristic deviation from the motor is determined and the correlation correction means determines and corrects the correction amount based on the result of the determination, even if the energizing phase varies or the DC motor is replaced as a service component, the spring, summer, autumn and winter Thus, a fan motor can be obtained which can always be controlled with high accuracy and consistently with respect to the indicated air flow regardless of day or night.
[0026]
In another aspect, the characteristic divergence determining means operates the DC motor substantially at a predetermined two rotation speeds in a fan motor.
[0027]
According to the present invention, it is possible to grasp the difference between the characteristics at the time of high load and at the time of low load, so that a fan motor capable of achieving more accurate air flow constant control can be obtained.
[0028]
Another means has a configuration of a fan motor characterized in that the characteristic deviation determination means operates periodically.
[0029]
According to the present invention, since the characteristic deviation determining means periodically grasps the state of the characteristic surface of the DC motor, the DC motor can be serviced even if physical characteristics such as bearings affect the motor characteristics due to aging or the like. Even if it is replaced as a part, it is possible to obtain a fan motor that can always control the indicated airflow with high accuracy and constant.
[0030]
BEST MODE FOR CARRYING OUT THE INVENTION
According to a first aspect of the present invention, there is provided a correlation storage means for indicating a correlation between a required specified number of rotations of a DC motor as a reference and an applied voltage in order to perform a constant operation at each air volume indicated by the air volume instruction means. A characteristic deviation determining unit that determines a characteristic difference between the DC motor and the reference DC motor; and a correlation correction that corrects the correlation stored in the correlation storage unit based on the determination result of the characteristic deviation determining unit. Means for comparing the corrected correlation with the current operation speed and the actual operation correlation of the applied voltage and controlling the applied voltage to the DC motor so as to be the same. The characteristic deviation determining means supplies a predetermined current or voltage to the DC motor, and determines the reference DC motor based on a voltage or current applied to the DC motor and an operation speed at that time. Is determined, and the correlation correction means determines the correction amount based on the determination result. The characteristic deviation determination means supplies a predetermined current to the DC motor. Alternatively, a voltage is supplied, the characteristic deviation from the reference DC motor is determined from the applied voltage or current to the DC motor and the operating speed at that time, and the correlation correction unit determines the correction amount based on the determination result. And has the effect of correcting.
[0031]
Further, in order to perform a constant operation at each air flow rate instructed by the air flow rate instructing means, there is provided a correlation storage means for indicating a correlation between a required prescribed number of rotations of the DC motor as a reference and a current, A characteristic deviation determining unit that determines a characteristic difference of the motor, a correlation correcting unit that corrects a correlation stored in the correlation storage unit from a determination result of the characteristic deviation determining unit, and a corrected correlation. Air flow control means for comparing the current operation rotational speed and the actual operation correlation of the current, and controlling the applied voltage to the DC motor so as to be the same, wherein the characteristic deviation determination means A predetermined current or voltage is supplied, and a characteristic divergence from the reference DC motor is determined from an equivalent voltage or current applied to the DC motor at that time and the operating speed, and The correlation correction unit determines the correction amount based on another result, and the correction amount is determined. The characteristic deviation determination unit supplies a predetermined current or voltage to the DC motor. The characteristic deviation from the reference DC motor is determined from the applied voltage or current to the DC motor and the operation speed, and the correlation correction unit determines and corrects the correction amount based on the result of the determination. .
[0032]
Further, an ambient temperature detecting unit for detecting an ambient temperature at which the fan motor is installed, an air volume instructing unit for instructing an operating air volume of the fan motor, and a constant operation at each air volume instructed by the air volume instructing unit, A correlation storage unit that indicates a correlation between a required specified number of rotations of a reference DC motor and an applied voltage at a reference ambient temperature; and a characteristic difference for determining a characteristic difference between the DC motor and the reference DC motor. Determining means, correlation correction means for correcting the correlation stored in the correlation storage means from the determination result of the characteristic deviation determining means and the ambient temperature detected by the atmospheric temperature detecting means, and the corrected correlation And the current operation speed and the correlation between the applied voltage and the applied voltage during actual operation, and controlling the applied voltage to the DC motor so as to be the same. Control characteristic means, wherein the characteristic deviation determination means supplies a predetermined current or voltage to the DC motor, and the reference DC or the current, the operating rotation speed and the ambient temperature at that time are used as the reference DC. A characteristic deviation from the motor is determined, and the correlation correction means determines a correction amount based on a result of the determination. The current or voltage of the DC motor is supplied, and the characteristic deviation from the reference DC motor is determined from the applied voltage or current to the DC motor at that time, the operating speed, and the ambient temperature. The correlation correction means has an effect of determining the correction amount and controlling while correcting the correction amount in accordance with the temperature change corresponding to the difference.
[0033]
Further, an ambient temperature detecting unit for detecting an ambient temperature at which the fan motor is installed, an air volume instructing unit for instructing an operating air volume of the fan motor, and a constant operation at each air volume instructed by the air volume instructing unit, Correlation storage means for indicating a correlation between a required prescribed number of rotations of a reference DC motor and a current at a reference ambient temperature, and characteristic discrimination determination for determining a characteristic difference between the DC motor and the reference DC motor. Means, a correlation correction means for correcting the correlation stored in the correlation storage means from the determination result of the characteristic deviation determination means and the ambient temperature detected by the atmosphere temperature detecting means, and a corrected correlation. And an air flow control means for comparing the current operating rotational speed with the actual operating correlation of the current and controlling the applied voltage to the DC motor so as to be the same. The characteristic deviation determination means supplies a predetermined current or voltage to the DC motor, and determines the reference DC motor based on an equivalent voltage or current applied to the DC motor at that time, an operation speed, and an ambient temperature. Is determined, and the correlation correction means determines the correction amount based on the determination result. The characteristic deviation determination means supplies a predetermined difference to the DC motor. A current or voltage is supplied, and a characteristic deviation from a reference DC motor is determined from a voltage or current applied to the DC motor at that time, an operating rotation speed, and an ambient temperature, and a result of the determination and the ambient temperature reference temperature are determined. The correlation correction unit has an operation of determining and correcting the correction amount and controlling while correcting the temperature change amount corresponding to the difference.
[0034]
In addition, the characteristic deviation determining means is configured to supply a predetermined current or voltage to the DC motor in a binary manner, so that the characteristic deviation can be grasped when the load is high and when the load is low. It has the action of:
[0035]
Further, the characteristic deviation determining means operates the DC motor at a predetermined rotation speed at a substantially constant speed, and determines a characteristic deviation from a reference DC motor from an equivalent voltage and current applied to the DC motor at that time. The characteristic divergence determining means operates the DC motor at a predetermined rotation speed at a substantially constant speed, and determines a difference between the DC motor as a reference and the equivalent voltage and current applied to the DC motor at that time. The characteristic deviation is determined, and based on the result of the determination, the correlation correction unit determines the correction amount and performs the correction.
[0036]
The characteristic deviation determining means operates the DC motor at a predetermined rotation speed at a substantially constant speed, and determines the characteristic deviation from the reference DC motor based on the equivalent voltage, current, and ambient temperature applied to the DC motor at that time. The characteristic deviation discriminating means operates the DC motor at a predetermined rotation speed at a substantially constant speed, and determines a reference DC motor based on an equivalent voltage and current applied to the DC motor at that time. Is determined, and the correlation correction unit determines and corrects the correction amount by combining the determination result with the temperature change corresponding to the difference between the ambient temperature and the reference temperature.
[0037]
In addition, the characteristic deviation determining means has a configuration of a fan motor characterized in that the DC motor is operated at a substantially constant two predetermined rotational speeds, and the characteristic deviation can be grasped at the time of high load and at the time of low load. It has the action of:
[0038]
Further, the characteristic deviation determining means has a configuration of a fan motor characterized in that it operates periodically, and has an effect that the characteristic deviation determining means periodically grasps the state of the characteristic surface of the DC motor.
[0039]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0040]
【Example】
(Example 1)
As shown in FIGS. 1 to 7, reference numeral 1 denotes a centrifugal fan motor having a DC motor 2 mounted thereon, and reference numeral 18 denotes a housing-shaped ventilation device incorporating the fan motor 1 for sucking indoor air from a room. An air supply port 18a and an exhaust port 18b for exhausting the drawn indoor air to the outside are opened. Room air contaminated by tobacco smoke, cooking waste gas, and oil smoke, which is sucked in by the fan motor 1 in the ventilation device 18 through the air supply duct 14a and the air supply port 18a, passes through the exhaust port 18b and the exhaust duct 14b. The air is discharged outside through the wall 15 of the building. Reference numeral 4 denotes an ambient temperature detecting means such as a thermistor for detecting the temperature of the air to be ventilated. The DC motor 2 includes a Hall IC 5 for detecting the position of a magnetic pole of the magnet rotor 3, a drive IC (not shown) equipped with an energization control unit 6 including a drive logic circuit 6a and a switching element group 6b, and an electronic device such as a capacitor. It has a built-in printed circuit board (not shown) on which components are mounted (FIG. 1 is a block diagram, and is not shown in a state of being built in the DC motor 2). The drive logic circuit 6a controls ON / OFF of the switching element group 6b based on the signal output of the Hall IC 5 to control the energization switching to the armature winding 17. Reference numeral 13 denotes an air flow amount instructing unit for instructing an operation air amount of the fan motor 1 such as weak, medium, or strong, 9 denotes an operation rotation speed detection unit for detecting an operation rotation speed from a signal output of the Hall IC 5, and 19 denotes a DC rotation speed. This is an applied voltage detecting means for detecting the applied voltage. Reference numeral 7 denotes current detection means for detecting the drive current of the DC motor 2. Reference numeral 12 denotes a constant operation of the reference DC motor at a reference temperature at each air flow indicated by the air flow instruction means 13 at the indicated air flow. This is a correlation storage unit that stores the number of rotations required for performing the operation as a specified number of rotations in association with a plurality of applied voltages. Numeral 8 is a correlation correcting means, which is a characteristic deviation determining means 10 for determining a characteristic deviation from a reference DC motor in the DC motor 2 and correcting the correlation with respect to the characteristic deviation; It comprises a temperature correcting means 16 for correcting a correlation according to a temperature difference between the temperature detected by the detecting means 4 and a predetermined reference temperature, and a characteristic deviation storage means 10a for storing characteristic deviation determination results. Numeral 11 denotes an air volume control unit which selects a reference specified rotation speed corresponding to the indicated air flow and the applied voltage from the correlation storage unit 12, corrects the selected specified rotation speed by the correlation correction unit 8, and corrects the corrected specified rotation speed. And the applied voltage to the DC motor 2 is controlled so that the operation speed becomes the same. The operation of the characteristic deviation determining means 10 is performed in the test mode when the ventilator 18 is installed, and the result of the operation is stored in the characteristic deviation storing means 10a.
[0041]
In the above configuration, by performing the test mode when the ventilation device 18 is installed, it is grasped to what extent the characteristics of the DC motor 2 mounted this time deviate from the characteristics of the reference DC motor. In the operation, the characteristic deviation determination means 10 outputs an instruction to apply a predetermined voltage to the DC motor 2 and operates the fan motor 1. Then, the operating speed detecting means 9 confirms that the rotation of the DC motor 2 is substantially stable, detects the current operating speed, and the current detecting means 7 detects the driving current of the DC motor 2. Then, based on the difference between the temperature of the air sucked by the fan motor 1 and the reference temperature by the ambient temperature detection means 4, the detected operating speed and current are corrected to the values at the reference temperature. FIG. 4 shows an example of a correlation diagram of this correction. As shown in the figure, when the detected current ambient temperature is higher than the reference temperature, the correlation shown in FIG. 4 is proportionally distributed according to the temperature difference, and the rotation speed is corrected positively and the current is corrected negatively. Conversely, when the detected current ambient temperature is lower than the reference temperature, the rotation speed is similarly negatively corrected, the current is positively corrected, and the temperature correction to the reference temperature is completed. Next, the characteristic deviation from the reference DC motor is grasped from the motor torque-rotation speed, motor torque-current characteristics and the temperature-corrected rotation speed and current shown in FIG. At this time, the current characteristic of the reference DC motor is compared with the temperature-corrected current. If the current value indicated by the current characteristic of the reference DC motor is lower than the temperature-corrected current value, the current DC motor 2 The commutation timing is determined to be a lag phase, and a correction coefficient for positively correcting the specified rotational speed stored in the correlation storage unit 12 is determined according to the difference in the current value. Conversely, the currents are compared, and if the current value indicated by the current characteristic of the reference DC motor is higher than the temperature-corrected current value, the current DC motor 2 determines that the commutation timing is advanced and the phase is determined. A correction coefficient for negatively correcting the specified rotation speed stored in the correlation storage unit 12 is determined according to the difference. Then, the determined correction coefficient is stored in the characteristic deviation storage unit 10a. Here, the test mode of the ventilation device 18 ends. Next, during normal operation, when the ambient temperature detected by the ambient temperature detecting unit 4 is higher than the reference temperature, the temperature correcting unit 16 determines a correction amount for positively correcting the specified rotation speed and conversely detects the correction amount. If the ambient temperature is lower than the reference temperature, a correction amount for negatively correcting the specified rotation speed is determined. The correction amount at this time is determined according to the difference between the detected ambient temperature and the reference temperature. Then, a reference specified rotation speed is selected from the correlation storage device 12 using the indicated air flow amount specified by the air flow amount specification device 13 and the applied voltage value detected by the applied voltage detection device 19 as parameters, and the selected specified rotation speed is selected. In the test mode, the correlation correction unit 8 corrects the characteristic deviation correction amount obtained from the characteristic deviation correction coefficient stored in the characteristic deviation storage unit 10a and performs correction corresponding to the change in the air temperature determined by the temperature correction unit 16. Correct the amount together. Next, the air volume control unit 11 increases or decreases the voltage applied to the DC motor 2 so that the specified rotation speed corrected by the correlation correction unit 8 and the operation rotation speed detected by the operation rotation speed detection unit 9 match. The control is performed by repeatedly decreasing the pressure. Here, FIG. 2 shows the air flow-static pressure and air flow-rotation speed and air flow-current characteristics of the fan motor due to the influence of the characteristic deviation of the DC motor, and FIG. 3 shows the motor torque-effect due to the influence of the characteristic deviation of the DC motor. The graph shows the rotation speed and motor torque-current characteristics. As is clear from the figure, in the centrifugal fan motor, the load on the DC motor becomes heavier when the static pressure is zero than when it is at the maximum static pressure. The closer to zero, the more noticeable the difference in current to the DC motor. The current increases as the amount of magnetic flux of the magnet of the magnet rotor decreases and approaches the state where the static pressure is zero. The current becomes higher as it approaches zero, and the smaller the dynamic torque of a bearing such as a bearing, the higher the current as the static pressure approaches zero, and the lower the resistance value of the armature winding, The current slightly increases as the static pressure approaches zero. Therefore, a fan motor equipped with a DC motor having a small amount of magnetic flux, a DC motor having a delayed phase, a DC motor having a small bearing dynamic torque, and a DC motor having a small resistance value of an armature winding is a fan having a DC motor as a reference. Since the point of use of the same indicated airflow and the same static pressure can be achieved with a low applied voltage to the motor, the specified rotation speed stored in the correlation storage unit 12 is corrected to the plus side or actually detected. What is necessary is just to select the specified rotation speed from the correlation storage means 12 using a value higher than the applied voltage as a parameter. Conversely, a DC motor having a large amount of magnetic flux, a DC motor having a leading phase, a DC motor having a large bearing dynamic torque, and a fan motor having a DC motor having a large resistance value of an armature winding have a DC motor as a reference. Since a high applied voltage is required for the fan motor at a point where the same indicated airflow and the same static pressure are used, the specified rotation speed stored in the correlation storage unit 12 is corrected to the negative side or the actual rotation is detected. What is necessary is just to select the prescribed number of revolutions from the correlation storage means 12 using a value lower than the applied voltage as a parameter. FIG. 4 shows air volume-static pressure, air volume-rotation speed, and air volume-current characteristics at the same applied voltage when the ambient temperature is high and low. As is clear from the figure, the rotation speed is higher when the ambient temperature is higher than when the ambient temperature is lower when the indicated air volume and the applied voltage are the same. Therefore, when the ambient temperature detected by the ambient temperature detecting means 4 is higher than the reference predetermined temperature, the specified rotation speed is corrected to the positive side, or the correlation storage is performed using a value higher than the actually detected applied voltage as a parameter. What is necessary is just to select the prescribed number of revolutions from the means 12. Conversely, when the detected ambient temperature is lower than the reference predetermined temperature, the specified rotation speed is corrected to the negative side, or the specified rotation speed is read from the correlation storage unit 12 as a parameter with a value lower than the actually detected applied voltage as a parameter. All you have to do is select a number.
[0042]
According to the fan motor 1 and the ventilator 18 according to the first embodiment of the present invention, the characteristic deviation determination unit 10 outputs an instruction to apply a predetermined voltage to the DC motor 2 to operate the fan motor 1, and The number detecting means 9 detects the current operating rotational speed of the DC motor 2, and the current detecting means 7 detects the driving current of the DC motor 2. Then, based on the difference between the temperature of the air sucked by the fan motor 1 and the reference temperature by the ambient temperature detection means 4, the detected operating speed and current are corrected to the values at the reference temperature. Then, the current characteristic of the reference DC motor is compared with the temperature-corrected current, and if the current value indicated by the current characteristic of the reference DC motor is lower than the temperature-corrected current value, the DC motor 2 of this time rotates. The flow timing is determined to be a lag phase, and a correction coefficient for positively correcting the specified rotation speed stored in the correlation storage unit 12 is determined according to the difference between the current values. Conversely, the currents are compared, and if the current value indicated by the current characteristic of the reference DC motor is higher than the temperature-corrected current value, the current DC motor 2 determines that the commutation timing is advanced and the phase is determined. By determining a correction coefficient for negatively correcting the specified rotation speed stored in the correlation storage unit 12 according to the difference, the characteristic deviation determination unit 10 can determine the resistance value, the magnetic flux amount of the magnet, Since the characteristic deviation from the reference DC motor due to the variation in the mounting position of the Hall IC and the like is grasped, and the correlation correction means 8 corrects the specified rotation speed by combining the characteristic deviation and the ambient temperature change. The fan motor and the ventilator can be operated with high accuracy and at a constant flow rate without being affected by the characteristic variation of 2 and the change of the ambient temperature.
[0043]
In the first embodiment, the ambient temperature detection means 4 is provided to correct the temperature of the rotation speed and the current. However, in the case of a fan motor or a ventilator installed in a substantially constant temperature and humidity environment such as a clean room, Without detecting the ambient temperature, it is only necessary to determine the characteristic deviation from the reference DC motor from the current and the rotation speed to correct the correlation. There is no difference in the operational effects of driving.
[0044]
Further, the DC motor 2 is configured to include the Hall IC 5 for detecting the magnetic pole position. However, the DC motor 2 may be configured to be a sensorless drive type DC motor that detects the magnetic pole position from an induced voltage or the like. There is no difference in the operation and effect that the operation is performed at a constant value with respect to the indicated airflow even if the production is not performed under detailed control of conditions.
[0045]
Further, the control method of correcting the specified rotation speed by directly adding / subtracting the rotation speed selected from the correlation storage unit 12 has been described. However, a method of selecting the specified rotation speed by shifting the applied voltage to be referred to may be used. In addition, there is no difference in the operational effect that the operation is performed at a constant value with respect to the indicated airflow.
[0046]
Further, the correlation storage unit 12 determines the number of rotations required for the DC motor serving as a reference at the reference temperature for each of the air volumes indicated by the air volume instruction unit 13 to perform a constant operation at the indicated air volume. Although the number is stored in association with a plurality of applied voltages as a number, the required applied voltage may be stored in accordance with a specified rotation speed, and further, a relational expression between the applied voltage and the specified rotation speed may be stored, and the applied voltage may be stored. The configuration may be such that the specified number of rotations is obtained from, or the required applied voltage is obtained using the number of rotations as a parameter.
[0047]
When determining the characteristic deviation, the detected rotation speed and current are corrected to the values at the reference temperature, but the characteristics of the reference DC motor are corrected to the characteristics at the atmospheric temperature detected by the ambient temperature detecting means. And there is no difference in the operation and effect.
[0048]
In the case of the PWM driving method, the peak value after rectification and smoothing may be detected, and a value obtained by multiplying the detected peak value by the duty may be controlled as a voltage, so that there is no difference in operation and effect. If the peak value does not vary, the duty may be directly controlled as a voltage.
[0049]
Further, by periodically operating the test mode for operating the characteristic divergence determination means 10, for example, once a year, the dynamic torque is reduced due to a slight decrease in the amount of bearing grease used in the DC motor 2. Even if the characteristics of the DC motor change from the initial state due to physical factors, such as a large decrease in the amount of grease or an increase in dynamic torque due to deterioration of the grease, the change can be detected, so a permanent instruction is given. A fan motor and a ventilator capable of constant control of the air volume are obtained.
[0050]
Further, in a DC motor that energizes a rectangular wave, the current detection means 7 may be configured to detect a peak current, and there is no difference in the operation and effect.
[0051]
The value of the voltage applied to the DC motor 2 during the operation of the characteristic divergence determination means 10 may be determined from the noise allowed by the fan motor 1 or the ventilator 18. The higher the applied voltage, the higher the characteristic. The deviation can be recognized in detail. Further, if the determination is made based on the two types of applied voltages at the time of high load and at the time of low load, the characteristic deviation can be recognized in more detail.
[0052]
In addition, although the characteristic deviation determining means 10 is configured to supply a predetermined applied voltage to the DC motor 2 to grasp the characteristic deviation, it may be configured to supply a predetermined current, in which case, the characteristic applied to the DC motor 2 is applied. The equivalent voltage and the rotation speed are detected, and the equivalent voltage and the operating rotation speed detected based on FIG. 7 are temperature-corrected, and the temperature-corrected equivalent voltage to the DC motor 2 is supplied in the same manner as when a predetermined applied voltage is supplied. By grasping the characteristic deviation from the reference DC motor based on the rotation speed and the rotation speed and correcting the correlation, there is no difference in the operational effect that the operation is performed at a constant value with respect to the indicated airflow.
[0053]
(Example 2)
As shown in FIGS. 8 to 10, reference numeral 22 denotes a rotation required for the reference DC motor to perform a constant operation at the indicated airflow for each airflow indicated by the airflow instruction means 13 at the reference temperature. A correlation storage means for storing the numbers corresponding to a plurality of currents. Reference numeral 21 denotes a correlation correction means for determining a difference between characteristics of the DC motor 2 and a reference DC motor. A characteristic deviation determining unit 20 for correcting the correlation with respect to the minute, a temperature correcting unit 16 for correcting the correlation according to a temperature difference between the temperature detected by the ambient temperature detecting unit 4 and a predetermined reference temperature, and a characteristic deviation. It is composed of a characteristic divergence storage unit 20a that stores the determination result. Other configurations are the same as those of the first embodiment, and a detailed description will be omitted.
[0054]
In the above configuration, by performing the test mode when the ventilation device 18 is installed, it is grasped to what extent the characteristics of the DC motor 2 mounted this time deviate from the characteristics of the reference DC motor. In the operation, the characteristic deviation determining means 20 rotates the DC motor 2 at a substantially constant speed so as to have a predetermined number of revolutions, the applied voltage detecting means 19 detects an equivalent voltage applied to the DC motor 2, Detects the drive current of the DC motor 2. Then, based on the difference between the temperature of the air sucked by the fan motor 1 and the reference temperature, the detected applied voltage and current are corrected to values at the reference temperature by the ambient temperature detecting means 4. FIG. 9 shows an example of a correlation diagram of this correction. As shown in the figure, when the detected current ambient temperature is higher than the reference temperature, the correlation of FIG. 9 is proportionally distributed according to the temperature difference, and the applied voltage is negatively corrected and the current is also negatively corrected. . Conversely, if the detected current ambient temperature is lower than the reference temperature, similarly, the applied voltage and current are plus-corrected to complete the temperature correction to the reference temperature. Next, the characteristic deviation from the reference DC motor is determined from the temperature-corrected applied voltage and current in the same manner as in the first embodiment. At this time, the load condition of the ventilator 18 is roughly grasped from the temperature-corrected applied voltage value, the current characteristic of the reference DC motor is compared with the temperature-corrected current, and the current value indicated by the current characteristic of the reference DC motor is obtained. However, if the current value is lower than the temperature-corrected current value, the DC motor 2 determines that the commutation timing is a delayed phase, and adds the specified rotation speed stored in the correlation storage unit 22 according to the difference in the current value. A correction coefficient to be corrected is determined. Conversely, the currents are compared, and if the current value indicated by the current characteristic of the reference DC motor is higher than the temperature-corrected current value, the current DC motor 2 determines that the commutation timing is advanced and the phase is determined. A correction coefficient for negatively correcting the specified rotation speed stored in the correlation storage unit 22 is determined according to the difference. Then, the determined correction coefficient is stored in the characteristic deviation storage unit 20a. Here, the test mode of the ventilation device 18 ends. Next, during normal operation, when the ambient temperature detected by the ambient temperature detecting unit 4 is higher than the reference temperature, the temperature correcting unit 16 determines a correction amount for positively correcting the specified rotation speed and conversely detects the correction amount. If the ambient temperature is lower than the reference temperature, a correction amount for negatively correcting the specified rotation speed is determined. The correction amount at this time is determined according to the difference between the detected ambient temperature and the reference temperature. Then, a reference specified rotation speed is selected from the correlation storage unit 22 using the indicated air flow indicated by the air flow amount indicating unit 13 and the current value detected by the current detection unit 7 as parameters, and the selected specified rotation speed is The correlation correction unit 21 calculates a characteristic deviation correction amount obtained from the characteristic deviation correction coefficient stored in the characteristic deviation storage unit 20a during the test mode, and a correction amount corresponding to the change in the air temperature determined by the temperature correction unit 16. Is also corrected. Next, the air volume control unit 11 raises or reduces the voltage applied to the DC motor 2 so that the specified rotation speed corrected by the correlation correction unit 21 and the operation rotation speed detected by the operation rotation speed detection unit 9 match. The control is performed by repeatedly decreasing the pressure.
[0055]
According to the fan motor 1 and the ventilator 18 according to the second embodiment of the present invention, the characteristic deviation determination unit 20 outputs an instruction to apply a voltage to the DC motor 2 to operate the fan motor 1, and the DC motor 2 After the voltage is adjusted so that the DC motor 2 operates at a predetermined speed at a substantially constant speed, the operating speed detecting means 9 confirms that the current operating speed of the DC motor 2 has reached the predetermined speed. Means 19 detects the equivalent voltage applied to the DC motor 2, and current detecting means 7 detects the drive current of the DC motor 2. Then, based on the difference between the temperature of the air sucked by the fan motor 1 and the reference temperature by the ambient temperature detection means 4, the detected operating speed and current are corrected to the values at the reference temperature. Then, the current characteristic of the reference DC motor is compared with the temperature-corrected current, and if the current value indicated by the current characteristic of the reference DC motor is lower than the temperature-corrected current value, the DC motor 2 of this time rotates. The flow timing is determined to be a lag phase, and a correction coefficient for positively correcting the specified rotation speed stored in the correlation storage unit 22 is determined according to the difference between the current values. Conversely, the currents are compared, and if the current value indicated by the current characteristic of the reference DC motor is higher than the temperature-corrected current value, the current DC motor 2 determines that the commutation timing is advanced and the phase is determined. By determining a correction coefficient for negatively correcting the specified rotation speed stored in the correlation storage unit 22 according to the difference, the characteristic deviation determination unit 20 can determine the resistance value, the magnetic flux amount of the magnet, Since the characteristic deviation from the reference DC motor due to the variation of the mounting position of the Hall IC and the like is grasped, and the correlation correction means 21 corrects the specified rotational speed by combining the characteristic deviation and the ambient temperature change. The fan motor and the ventilator can be operated with high accuracy and at a constant flow rate without being affected by the characteristic variation of 2 and the change of the ambient temperature.
[0056]
Further, since the correlation storage unit 22 stores the current as a parameter, even if the driving method of the DC motor 2 is a high-voltage PWM drive, a value obtained by multiplying the peak value after rectification and smoothing by a duty is not used as a parameter. Further, since the resolution per bit of a microcomputer or the like to be used is prevented from becoming coarse, a fan motor and a ventilator that can be operated at a high precision and at a constant flow rate can be obtained.
[0057]
In the second embodiment, the ambient temperature detecting means 4 is provided to correct the rotation speed and the current by the temperature. However, in a fan motor or a ventilator installed in a substantially constant temperature and humidity environment such as a clean room, Without detecting the ambient temperature, it is only necessary to determine the characteristic deviation from the reference DC motor from the current and the rotation speed to correct the correlation. There is no difference in the operational effects of driving.
[0058]
Further, the control method of correcting the specified rotation speed by directly adding / subtracting the rotation speed selected from the correlation storage unit 22 is used. However, a method of selecting the specified rotation speed by shifting the current to be referred to may be used. There is no difference in the operation and effect of operating at a constant with the indicated airflow.
[0059]
Further, the correlation storage unit 22 determines the number of rotations required for the DC motor serving as a reference at the reference temperature for each of the air volumes indicated by the air volume instructing unit 13 to perform a constant operation at the instructed air volume. Although the number is stored in correspondence with a plurality of currents as a number, a necessary current may be stored in correspondence with a specified rotation speed, and furthermore, a relational expression between the current and the specified rotation speed is stored, and the specified rotation speed is calculated from the current. Or a configuration in which a necessary current is obtained by using the rotation speed as a parameter.
[0060]
When determining the characteristic deviation, the detected voltage and current are corrected to the values at the reference temperature, but the characteristics of the reference DC motor are corrected to the characteristics at the atmospheric temperature detected by the ambient temperature detecting means. It does not make a difference in its effect.
[0061]
The predetermined rotation speed of the DC motor 2 at the time of the operation of the characteristic deviation determination means 20 may be determined from the noise allowed by the fan motor 1 or the ventilator 18. The higher the applied voltage, the higher the characteristic deviation. Can be recognized in detail. Further, if the determination is made based on the two types of rotation speeds at the time of high load and at the time of low load, the characteristic deviation can be recognized in more detail.
[0062]
【The invention's effect】
As is apparent from the above embodiment, according to the present invention, a correlation storage unit is provided which indicates a correlation between a required specified number of rotations of a DC motor as a reference and an applied voltage, and the characteristic deviation determination unit is provided to the DC motor. A predetermined current or voltage is supplied, the characteristic deviation from the reference DC motor is determined from the applied voltage or current to the DC motor and the operating speed at that time, and the correlation correction unit corrects based on the determination result. By determining the amount, the magnetic pole position of the magnet rotor is detected using a magnetic pole detection element such as a Hall IC, and the energized phase is switched, and the energized phase becomes a lag phase or an advanced phase with respect to the induced voltage phase. Fan motor that can always control the indicated airflow with high accuracy and constant in a space where the ambient temperature does not change, regardless of whether the DC motor is mounted or the DC motor is replaced as a service component. Pre-ventilation device is obtained.
[0063]
In addition, a correlation storage means for indicating a correlation between a required prescribed number of rotations of the DC motor as a reference and a current is provided, and a characteristic deviation determining means supplies a predetermined current or voltage to the DC motor and applies the current to the DC motor at that time. From the equivalent voltage or current to be driven and the operating rotational speed, the characteristic deviation from the reference DC motor is determined, and based on the determination result, the correlation correction unit determines the correction amount, thereby performing PWM driving. Using a magnetic pole detection element such as a Hall IC to detect the magnetic pole position of the magnet rotor and switch the energized phase, even if a DC motor is installed in which the energized phase is lagging or leading with respect to the induced voltage phase. Motor and ventilation that can always control the indicated airflow with high accuracy and constant in a space where the ambient temperature does not change even if the DC motor is replaced as a service part Location can be obtained.
[0064]
Further, an atmosphere temperature detecting means for detecting an atmosphere temperature in which the fan motor is installed, and a correlation storage means for showing a correlation between a required prescribed number of rotations of a reference DC motor and an applied voltage at a reference atmosphere temperature. The characteristic divergence determining means supplies a predetermined current or voltage to the DC motor, and determines the characteristic divergence from the reference DC motor based on the applied voltage or current to the DC motor, the operating speed, and the ambient temperature at that time. The correlation correction means determines the correction amount based on the discrimination result, 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, thereby inducing the energized phase. Regardless of whether the DC motor is installed as a lag phase or advance phase with respect to the voltage phase, or if the DC motor is replaced as a service component, Fan motor and ventilator can be controlled to be constant with high accuracy can be obtained for the indicated air amount.
[0065]
Also provided are an ambient temperature detecting means for detecting an ambient temperature in which the fan motor is installed, and a correlation storage means for showing a correlation between a required specified number of rotations of a reference DC motor and a current at a reference ambient temperature. The characteristic deviation determining means supplies a predetermined current or voltage to the DC motor, and determines the characteristic deviation from the reference DC motor based on the equivalent voltage or current applied to the DC motor at that time, the operating rotation speed, and the ambient temperature. On the basis of the result of the determination, the correlation correction means determines the correction amount, thereby performing PWM drive, and detecting the magnetic pole position of the magnet rotor using a magnetic pole detection element such as a Hall IC to determine the energized phase. Switch, replace DC motor as a service component even if a DC motor is installed whose conduction phase is delayed or advanced with respect to the induced voltage phase Also, seasons, regardless day or night, always fan motor and ventilator can be controlled to be constant with high precision for the indicated air amount is obtained.
[0066]
In addition, the characteristic deviation determination means can supply a predetermined current or voltage to the DC motor in two values, so that the characteristic deviation can be grasped at the time of a high load and at the time of a low load. The fan motor and the ventilation device which can realize the above are obtained.
[0067]
The characteristic divergence determining means operates the DC motor at a substantially constant speed at a predetermined rotation speed, and determines the characteristic divergence from the reference DC motor based on the equivalent voltage and current applied to the DC motor at that time, thereby performing PWM drive. DC motors that detect the magnetic pole position of the magnet rotor using a magnetic pole detection element such as a Hall IC to switch the energized phase, and that the energized phase is a lag phase or an advanced phase with respect to the induced voltage phase Even if the DC motor is replaced as a service component, a fan motor and a ventilator that can always control the indicated airflow with high accuracy and constant can be obtained.
[0068]
The characteristic deviation determining means operates the DC motor at a predetermined rotation speed at a substantially constant speed, and determines a characteristic deviation from a reference DC motor based on an equivalent voltage, current, and ambient temperature applied to the DC motor at that time. , Even in the PWM drive, the magnetic pole position of the magnet rotor is detected by using a magnetic pole detecting element such as a Hall IC, and the energized phase is switched, and the energized phase is delayed with respect to the induced voltage phase and advanced phase. Even if a DC motor is mounted or the DC motor is replaced as a service component, a fan motor that can always control the indicated airflow with high accuracy and constant regardless of whether it is spring, summer, autumn or winter, day or night can be obtained.
[0069]
In addition, the characteristic deviation determining means operates the DC motor at a constant two predetermined rotational speeds, so that the characteristic deviation can be grasped at the time of high load and at the time of low load. The fan motor and the ventilation device which can realize the above are obtained.
[0070]
In addition, the characteristic deviation determination means operates periodically to reduce the dynamic torque due to a slight decrease in the amount of bearing grease used in the DC motor, to significantly reduce the amount of grease, and to reduce the dynamic torque due to deterioration of the grease. Even if the characteristics of the DC motor change from the initial state due to a physical factor such as an increase, the change can be detected, so that a fan motor and a ventilator capable of permanently controlling the indicated airflow at a constant level can be obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a ventilation device equipped with a fan motor according to a first embodiment of the present invention.
FIG. 2 is a graph showing airflow-static pressure and airflow-rotational speed and airflow-current characteristics due to characteristic deviation when a voltage applied to a DC motor mounted on the fan motor is fixed.
FIG. 3 is a graph showing motor torque-rotation speed and motor torque-current characteristics due to characteristic deviation when a voltage applied to a DC motor mounted on the fan motor is fixed.
FIG. 4 is a graph showing air volume-static pressure and air volume-rotation speed and air volume-current characteristics when the voltage applied to the DC motor is fixed when the fan motor changes in ambient temperature.
FIG. 5 is a diagram showing a table showing an example of storage contents of a correlation storage unit in the fan motor.
FIG. 6 is a diagram showing a table showing an example of correction contents of a specified rotation speed in the fan motor.
FIG. 7 is a graph showing air volume-static pressure, air volume-voltage, and air volume-current characteristics when the current of the DC motor is fixed when the ambient temperature of the fan motor changes.
FIG. 8 is a block diagram illustrating a configuration of a ventilation device equipped with a fan motor according to a second embodiment of the present invention.
FIG. 9 is a graph showing air volume-static pressure and air volume-voltage and air volume-current characteristics when the rotation speed of the DC motor is fixed when the ambient temperature of the fan motor changes.
FIG. 10 is a graph showing air volume-static pressure and air volume-voltage and air volume-current characteristics when the number of rotations of the DC motor mounted on the fan motor is varied and the rotation speed is fixed.
FIG. 11 is a graph showing airflow-static pressure and airflow-rotational speed characteristics according to a 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 Electricity control means
6a Drive logic circuit
6b Switching element group
7 Current detection means
8 Correlation correction means
9 Operating speed detection means
10 Characteristic deviation determination means
10a Characteristic deviation storage means
11 Air volume control means
12. Correlation storage means
13 Air volume indicating means
14a Air supply duct
14b exhaust duct
15 walls
16 Temperature compensation means
17 armature winding
18 Ventilation system
18a air supply port
18b exhaust port
19 Applied voltage detection means
20 Characteristic divergence means
21 Correlation correction means
22 Correlation storage means

Claims (11)

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、この風量指示手段によって指示された各風量で一定運転するために、基準となるＤＣモータの必要な規定回転数と印加電圧の相関関係を示す相関関係記憶手段と、前記ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と印加電圧の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへの印加電圧または電流と運転回転数から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータ。A fan motor equipped with a DC motor, comprising: a position detecting means for detecting a magnetic pole position of a magnet rotor of the DC motor; and a power supply to a plurality of armature windings of the DC motor based on a signal from the position detecting means. Control means for controlling the rotation speed of the DC motor, rotation speed detection means for detecting the operation rotation speed of the DC motor from the signal output of the position detection means, air flow amount instruction means for instructing the operation air flow amount of the fan motor, and this air amount instruction means Correlation storage means for indicating a correlation between a required prescribed number of rotations of a DC motor as a reference and an applied voltage in order to perform a constant operation at each air flow instructed by the DC motor and characteristics of the DC motor and the reference DC motor A characteristic deviation determining means for determining a difference, and a correlation correcting means for correcting the correlation stored in the correlation storing means from the determination result of the characteristic deviation determining means. And, the corrected correlation, while comparing the current operation speed and the actual operation correlation of the applied voltage, the air flow control means for controlling the applied voltage to the DC motor so as to be the same, comprising: The characteristic deviation determining means supplies a predetermined current or voltage to the DC motor, and determines a characteristic deviation from the reference DC motor based on a voltage or current applied to the DC motor and an operation speed at that time, A fan motor, wherein the correlation correction means determines a correction amount based on a result of the determination. 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、この風量指示手段によって指示された各風量で一定運転するために、基準となるＤＣモータの必要な規定回転数と電流の相関関係を示す相関関係記憶手段と、前記ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と電流の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへ印加する等価電圧または電流と運転回転数から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータ。A fan motor equipped with a DC motor, comprising: a position detecting means for detecting a magnetic pole position of a magnet rotor of the DC motor; and a power supply to a plurality of armature windings of the DC motor based on a signal from the position detecting means. Control means for controlling the rotation speed of the DC motor, rotation speed detection means for detecting the operation rotation speed of the DC motor from the signal output of the position detection means, air flow amount instruction means for instructing the operation air flow amount of the fan motor, and this air amount instruction means Correlation storage means indicating the correlation between the required specified number of revolutions of the DC motor as a reference and the current in order to perform a constant operation at each air flow instructed by the DC motor, and a characteristic difference between the DC motor and the reference DC motor. A characteristic divergence determining means for determining the correlation divergence, and a correlation correction means for correcting the correlation stored in the correlation storage means from the determination result of the characteristic divergence determining means. Comparing the corrected correlation with the current operation speed and the actual operation correlation of the current, and controlling the applied voltage to the DC motor so as to be equal to each other. The determining means supplies a predetermined current or voltage to the DC motor, and determines a characteristic deviation from the reference DC motor based on an equivalent voltage or current applied to the DC motor and an operation speed at that time. A fan motor, wherein the correlation correction means determines a correction amount based on a result. 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で一定運転するために、基準の雰囲気温度時において、基準となるＤＣモータの必要な規定回転数と印加電圧の相関関係を示す相関関係記憶手段と、前記ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果と前記雰囲気温度検出手段の検知した雰囲気温度から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と印加電圧の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへの印加電圧または電流と運転回転数と雰囲気温度から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータ。A fan motor equipped with a DC motor, comprising: a position detecting means for detecting a magnetic pole position of a magnet rotor of the DC motor; and a power supply to a plurality of armature windings of the DC motor based on a signal from the position detecting means. Power control means for controlling the rotation speed of the DC motor from the signal output of the position detecting means, and an ambient temperature detecting means for detecting the ambient temperature where the fan motor is installed, Air flow instructing means for instructing the operating air flow rate of the fan motor; and a required specified number of rotations of a reference DC motor at a reference ambient temperature in order to perform a constant operation at each air flow instructed by the air flow instructing means. Correlation storage means for indicating a correlation between applied voltages; characteristic deviation determination means for determining a characteristic difference between the DC motor and the reference DC motor; A correlation correction unit that corrects the correlation stored in the correlation storage unit based on the determination result of the characteristic deviation determination unit and the ambient temperature detected by the ambient temperature detection unit; a corrected correlation; Air flow control means for controlling the applied voltage to the DC motor so as to be equal to the number of rotations and the actual operation correlation of the applied voltage; and A current or voltage is supplied, and a characteristic deviation from the reference DC motor is determined based on a voltage or current applied to the DC motor, an operating speed, and an ambient temperature at that time, and the correlation is determined based on the determination result. A fan motor, wherein the correction means determines a correction amount. 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で一定運転するために、基準の雰囲気温度時において、基準となるＤＣモータの必要な規定回転数と電流の相関関係を示す相関関係記憶手段と、前記ＤＣモータと前記基準となるＤＣモータの特性差を判別する特性乖離判別手段と、この特性乖離判別手段の判断結果と前記雰囲気温度検出手段の検知した雰囲気温度から、前記相関関係記憶手段に記憶された相関関係を補正する相関関係補正手段と、補正された相関関係と、現在の運転回転数と電流の実運転時相関関係とを比較するとともに、同一になるよう前記ＤＣモータへの印加電圧を制御する風量制御手段とを備え、前記特性乖離判別手段は前記ＤＣモータへ所定の電流または電圧を供給し、その時の前記ＤＣモータへ印加する等価電圧または電流と運転回転数と雰囲気温度から、前記基準となるＤＣモータとの特性乖離を判別し、その判別結果に基づいて前記相関関係補正手段は補正量を決定することを特徴とするファンモータ。A fan motor equipped with a DC motor, comprising: a position detecting means for detecting a magnetic pole position of a magnet rotor of the DC motor; and a power supply to a plurality of armature windings of the DC motor based on a signal from the position detecting means. Power control means for controlling the rotation speed of the DC motor from the signal output of the position detecting means, and an ambient temperature detecting means for detecting the ambient temperature where the fan motor is installed, Air flow instructing means for instructing the operating air flow rate of the fan motor; and a required specified number of rotations of a reference DC motor at a reference ambient temperature in order to perform a constant operation at each air flow instructed by the air flow instructing means. A correlation storage unit that indicates a correlation between currents; a characteristic deviation determining unit that determines a characteristic difference between the DC motor and the reference DC motor; Correlation correction means for correcting the correlation stored in the correlation storage means from the determination result of the divergence determination means and the ambient temperature detected by the atmosphere temperature detection means; a corrected correlation; And a flow rate control means for controlling the applied voltage to the DC motor so as to be equal to each other, wherein the characteristic deviation determination means controls the DC motor with a predetermined current or A voltage is supplied, a characteristic deviation from the reference DC motor is determined from an equivalent voltage or current applied to the DC motor at that time, an operating speed, and an ambient temperature, and the correlation correction is performed based on the determination result. The means determines the correction amount. 請求項１〜４記載のファンモータにおいて、特性乖離判別手段は前記ＤＣモータへの所定の電流または電圧を２値供給する特性乖離判別手段に置き換えたことを特徴とするファンモータ。5. The fan motor according to claim 1, wherein the characteristic deviation determining unit is replaced with a characteristic deviation determining unit that supplies a predetermined current or voltage to the DC motor in two values. 請求項１または２記載のファンモータにおいて、特性乖離判別手段は前記ＤＣモータを所定の回転数で略一定運転し、その時の前記ＤＣモータへ印加する等価電圧と電流から、前記基準となるＤＣモータとの特性乖離を判別する特性乖離判別手段に置き換えたことを特徴とするファンモータ。3. The fan motor according to claim 1, wherein the characteristic deviation determining means operates the DC motor at a substantially constant speed at a predetermined rotation speed, and determines the reference DC motor based on an equivalent voltage and current applied to the DC motor at that time. And a characteristic deviation determining means for determining a characteristic deviation from the fan motor. 請求項３または４のファンモータにおいて、特性乖離判別手段は前記ＤＣモータを所定の回転数で略一定運転し、その時の前記ＤＣモータへ印加する等価電圧と電流と雰囲気温度から、前記基準となるＤＣモータとの特性乖離を判別する特性乖離判別手段に置き換えたことを特徴とするファンモータ。5. The fan motor according to claim 3, wherein the characteristic deviation determination unit operates the DC motor at a substantially constant speed at a predetermined rotation speed, and uses the equivalent voltage, current, and ambient temperature applied to the DC motor at that time as the reference. A fan motor characterized in that it is replaced with a characteristic deviation determining means for determining characteristic deviation from a DC motor. 請求項６または７記載のファンモータにおいて、特性乖離判別手段は前記ＤＣモータを所定の２つの回転数で略一定運転する特性乖離判別手段に置き換えたことを特徴とするファンモータ。8. The fan motor according to claim 6, wherein the characteristic deviation determining unit replaces the DC motor with a characteristic deviation determining unit that operates at substantially two predetermined rotation speeds. 特性乖離判別手段は周期的に動作することを特徴とする請求項１から８のいずれかに記載のファンモータ。The fan motor according to any one of claims 1 to 8, wherein the characteristic deviation determination means operates periodically. 請求項１から９のいずれかに記載のファンモータを搭載した電気機器。An electric device equipped with the fan motor according to claim 1. 請求項１０記載の電気機器は換気装置、空気清浄機、除湿機、ファンフィルタユニット、給湯機、給湯暖房機、乾燥機、暖房乾燥機のいずれかであることを特徴とする電気機器。The electric device according to claim 10, wherein the electric device is any one of a ventilator, an air purifier, a dehumidifier, a fan filter unit, a water heater, a hot water heater, a dryer, and a heating dryer.
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