JP3485686B2 - Abnormal control device for rotation speed of DC brushless motor - Google Patents
Abnormal control device for rotation speed of DC brushless motorInfo
- Publication number
- JP3485686B2 JP3485686B2 JP22774895A JP22774895A JP3485686B2 JP 3485686 B2 JP3485686 B2 JP 3485686B2 JP 22774895 A JP22774895 A JP 22774895A JP 22774895 A JP22774895 A JP 22774895A JP 3485686 B2 JP3485686 B2 JP 3485686B2
- Authority
- JP
- Japan
- Prior art keywords
- rotation speed
- threshold value
- brushless motor
- normal
- abnormality
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明はDCブラシレスモー
タ、特に送風用の小型ファンモータ等に適するDCブラ
シレスモータの回転数異常制御装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC brushless motor, and more particularly to a rotation speed abnormality control device for a DC brushless motor suitable for a small fan motor for blowing air.
【0002】[0002]
【従来の技術】図6〜図7は従来のDCブラシレスモー
タの回転数異常制御装置の構成と動作を示す図である。
図6に示すように、DCブラシレスモータの永久磁石回
転子の磁極位置を検出する磁極検出素子4からの信号を
アンプ6を介してマイコン1に入力し、マイコン1より
通電信号を出力し、モータ駆動回路3を介して一方の固
定子巻線2に電流を流す。同様にして、アンプ7を介し
てマイコン1に入力された信号により、マイコン1より
位相の遅れた通電信号を出力し、他方の固定子巻線2に
位相の遅れた電流を流す。今、負荷変動等の原因によ
り、回転数に異常が生ずると、マイコン1により回転数
異常を検出し、回転数異常の出力が出されると共に、図
7に示すように、時間幅T3のパルス状大電流の通電
と、時間幅T4の小電流または無通電の通電を交互に繰
返す再起動通電を何回も繰り返して行って、その後正常
復帰電流を通電し、正常回転に復帰させている。2. Description of the Related Art FIGS. 6 to 7 are views showing the configuration and operation of a conventional rotation speed abnormality control device for a DC brushless motor.
As shown in FIG. 6, the signal from the magnetic pole detection element 4 for detecting the magnetic pole position of the permanent magnet rotor of the DC brushless motor is input to the microcomputer 1 through the amplifier 6, and the energization signal is output from the microcomputer 1 to drive the motor. A current is passed through one of the stator windings 2 via the drive circuit 3. Similarly, a signal input to the microcomputer 1 via the amplifier 7 outputs an energization signal delayed in phase from the microcomputer 1, and a current delayed in phase is supplied to the other stator winding 2. Now, when an abnormality occurs in the rotation speed due to a load fluctuation or the like, the microcomputer 1 detects the rotation speed abnormality and outputs an output of the rotation speed abnormality, and as shown in FIG. A large amount of current is applied and a small amount of current having a time width T4 or non-energization is alternately repeated to perform restarting energization, and then a normal return current is applied to restore normal rotation.
【0003】[0003]
【発明が解決しようとする課題】しかし、このような従
来のDCブラシレスモータの回転数異常制御装置におい
ては、図7に示すように、断続的にパルス状大電流を流
す再起動通電を何回も繰返し行うため、モータ駆動回路
3の半導体素子の保護の面で不利益となる問題があっ
た。However, in such a conventional DC brushless motor rotation speed abnormality control device, as shown in FIG. 7, the restart energization for intermittently supplying a pulsed large current is repeated. Since it is repeatedly performed, there is a problem in that it is disadvantageous in terms of protection of the semiconductor element of the motor drive circuit 3.
【0004】本発明は上述の課題を解決するためになさ
れたもので、モータ駆動回路半導体素子の保護を確実に
行い、正常復帰時にモータの再起動を確実に行うDCブ
ラシレスモータの回転数異常制御装置を提供することを
目的とする。The present invention has been made in order to solve the above-mentioned problems, and the rotation speed abnormality control of a DC brushless motor which surely protects a semiconductor element of a motor drive circuit and surely restarts the motor when returning to a normal state. The purpose is to provide a device.
【0005】[0005]
【課題を解決するための手段】この目的を達成するた
め、本発明のDCブラシレスモータの回転数異常制御装
置においては、図1に示すように、 DCブラシレスモ
ータの永久磁石回転子の磁極位置を検出する磁極検出素
子と、上記磁極検出素子の出力から上記永久磁石回転子
の回転数を算出する回転数算出手段と、上記回転数が予
め設定された回転数しきい値を一定の回転数異常遅延時
間の間超えた時、回転数異常を判別する回転数異常検出
手段と、上記回転数異常を検出後、小電流を上記ブラシ
レスモータの固定子巻線に流し、その後回転数が予め設
定された正常復帰回転数しきい値を超えた時のみ、一定
時間幅のパルス状大電流を通電する再起動通電手段と、
その後さらに、上記回転数しきい値を再び超えた時、正
常復帰電流を通電する正常復帰通電手段とを設ける。To achieve this object, in the DC brushless motor rotation speed abnormality control device of the present invention, as shown in FIG. 1, the magnetic pole position of the permanent magnet rotor of the DC brushless motor is set. A magnetic pole detecting element for detecting, a rotational speed calculating means for calculating the rotational speed of the permanent magnet rotor from the output of the magnetic pole detecting element, and a rotational speed anomaly in which the rotational speed is a preset rotational speed threshold value. When the delay time is exceeded, a rotation speed abnormality detecting means for determining a rotation speed abnormality and a small current is passed through the stator winding of the brushless motor after detecting the rotation speed abnormality, and then the rotation speed is preset. A restart energizing means for energizing a pulsed large current with a constant time width only when the normal return speed threshold value is exceeded,
After that, further provided is a normal return energizing means for supplying a normal return current when the rotational speed threshold value is again exceeded.
【0006】さらに、上記回転数異常を判別する上記回
転数しきい値を任意に設定できる回転数異常判別しきい
値設定手段、あるいは、上記再起動通電の上記パルス状
大電流の通電時間を任意に設定できる遅延時間設定手
段、あるいは、上記正常復帰回転数を判別する上記正常
復帰回転数しきい値を任意に設定できる正常復帰判別回
転数しきい値設定手段を設ける。Further, a rotation speed abnormality determination threshold value setting means capable of arbitrarily setting the rotation speed threshold value for determining the rotation speed abnormality, or an energization time of the pulsed large current for the restart energization is arbitrary. The delay time setting means capable of setting the normal return rotation speed threshold value setting means for setting the normal return rotation speed threshold value for determining the normal return rotation speed can be arbitrarily set.
【0007】このDCブラシレスモータの回転数異常制
御装置においては、図2に示すように、磁極検出素子が
永久磁石回転子の磁極位置を検出し、回転数算出手段が
磁極検出素子の出力から永久磁石回転子の回転数を算出
し、回転数異常検出手段が予め設定された回転数しきい
値を超えたか否かを判別し、超過した場合、T2時間の
遅延時間後小電流を通電する。その後、予め設定された
正常復帰回転数しきい値を超えたか否かを判別し、超過
した場合のみ、T2時間のパルス状大電流を流す再起動
通電を行う。その後、さらに回転数しきい値を再び超え
た時、正常復帰通電手段により正常復帰電流を通電すれ
ば、正常回転数に復帰させることができる。正常回転数
復帰が不成功の場合は、自動的に元の状態の戻るので、
上記再起動通電が繰返され確実に正常回転数復帰が行わ
れる。このようにして、パルス状大電流を伴う再起動通
電を、従来の技術のように不必要に何回も繰返し行うこ
となく、必要最小限に押さえることができる。In this DC brushless motor rotation speed abnormality control device, as shown in FIG. 2, the magnetic pole detection element detects the magnetic pole position of the permanent magnet rotor, and the rotation speed calculation means permanently changes the output of the magnetic pole detection element. The rotation speed of the magnet rotor is calculated, and it is determined whether or not the rotation speed abnormality detecting means exceeds a preset rotation speed threshold value. If it exceeds, a small current is passed after a delay time of T2 time. Then, it is determined whether or not the preset threshold value for normal speed of rotation is exceeded, and only when the threshold value is exceeded, restart energization is performed in which a large pulsed current for T2 is passed. After that, when the rotation speed threshold value is again exceeded, by supplying a normal recovery current with the normal recovery energizing means, the normal speed can be recovered. If the return to normal speed is unsuccessful, it automatically returns to the original state.
The restart energization is repeated to reliably restore the normal rotation speed. In this way, the restart energization involving the pulsed large current can be suppressed to the necessary minimum without performing the unnecessary repetition many times as in the conventional technique.
【0008】さらに、回転数異常判別しきい値設定手段
により、正常復帰が確実に行われる適切な回転数しきい
値を設定することができる。あるいは、遅延時間設定手
段により、上記パルス状大電流の通電時間を適切に設定
できるので、効果的な再起動通電および正常復帰通電が
可能となる。あるいは、正常復帰判別回転数しきい値設
定手段により、上記正常復帰回転数しきい値を適切に設
定することができるので、再起動通電の繰返し回数を、
さらに必要最小限に押えることができる。Further, the rotation speed abnormality determination threshold value setting means can set an appropriate rotation speed threshold value for surely returning to normal. Alternatively, since the energizing time of the pulsed large current can be appropriately set by the delay time setting means, effective restart energization and normal recovery energization are possible. Alternatively, since the normal return determination rotation speed threshold value setting means can appropriately set the normal return rotation speed threshold value,
Furthermore, it can be suppressed to the minimum necessary.
【0009】[0009]
【発明の実施の形態】図3〜図4は本発明に係るDCブ
ラシレスモータの回転数異常制御装置の実施の形態の説
明図である。図4に示すように、磁極検出素子4の出力
がアンプ6を介してマイコン1に入力され、マイコン1
に実装された回転数算出手段8により回転数を算出し、
該回転数および回転数異常判別しきい値設定手段12か
ら入力された回転数異常しきい値から、回転数異常検出
手段9が回転数異常を判別する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 3 to 4 are explanatory views of an embodiment of a rotation speed abnormality control device for a DC brushless motor according to the present invention. As shown in FIG. 4, the output of the magnetic pole detection element 4 is input to the microcomputer 1 via the amplifier 6,
The rotation speed is calculated by the rotation speed calculation means 8 mounted in
From the rotation speed and the rotation speed abnormality threshold value input from the rotation speed abnormality determination threshold value setting means 12, the rotation speed abnormality detecting means 9 determines the rotation speed abnormality.
【0010】次に、回転数異常信号が再起動通電手段1
0に入力されると、図5に示すように、遅延時間設定手
段13により設定されたT2の遅延時間後、小電流の通
電が行われる。その後、正常復帰判別回転数しきい値設
定手段14により設定された正常復帰回転数しきい値を
超えた場合、再起動通電手段10により、上記T2時間
のパルス状大電流を通電する再起動通電が行われる。そ
の後さらに、上記回転数しきい値を再び超えた場合に、
正常復帰通電手段11により正常復帰通電が行われ、正
常回転数に復帰させることができる。正常回転数復帰が
不成功の場合は、自動的に元の状態に戻るので、上記再
起動通電が繰返され確実に正常回転数復帰が行われる。
上記のような再起動通電により、図7の従来技術に示し
たような、不必要な再起動通電を繰返し何回も行うこと
なく、正常回転数復帰が行われ、モータ駆動回路3の半
導体素子の保護に不利益を与えることなく、確実な再起
動を行うことができる。Next, the rotation speed abnormality signal indicates the restart energizing means 1
When it is input to 0, as shown in FIG. 5, after a delay time of T2 set by the delay time setting means 13, a small current is supplied. After that, when the normal return rotation speed threshold value set by the normal return determination rotation speed threshold value setting means 14 is exceeded, the restart energization means 10 applies the pulsed large current for the above-mentioned T2 time to the restart energization. Is done. After that, when the speed threshold value is exceeded again,
The normal return energization means 11 performs normal return energization, and can return to the normal rotation speed. If the normal rotation speed restoration is unsuccessful, it automatically returns to the original state, so that the restart energization is repeated to reliably perform the normal rotation speed restoration.
Due to the above restart energization, the normal rotation speed is restored without repeatedly performing unnecessary restart energization as shown in the prior art of FIG. 7, and the semiconductor element of the motor drive circuit 3 is restored. A reliable restart can be performed without penalizing the protection of.
【0011】[0011]
【発明の効果】以上説明したように、本発明に係るDC
ブラシレスモータの回転数異常制御装置においては、パ
ルス状大電流を伴う再起動通電を不必要に繰返し何回も
行うことなく、必要最小限に押さえることができるの
で、モータ駆動回路半導体素子の保護を確実に行い、正
常復帰時にモータの再起動を確実に行うことができる。As described above, the DC according to the present invention
In the rotation speed abnormality control device for a brushless motor, the restart energization with a pulsed large current can be suppressed to the necessary minimum without needlessly repeated many times. It can be surely performed, and the motor can be surely restarted when returning to the normal condition.
【図1】本発明のクレーム対応図である。FIG. 1 is a diagram corresponding to a claim of the present invention.
【図2】本発明のフローチャート図である。FIG. 2 is a flowchart of the present invention.
【図3】本発明の実施形態としての制御装置である。FIG. 3 is a control device as an embodiment of the present invention.
【図4】本発明の実施形態の説明図である。FIG. 4 is an explanatory diagram of an embodiment of the present invention.
【図5】回転数および通電電流の時間的変化説明図であ
る。FIG. 5 is an explanatory diagram of changes over time in the rotation speed and the energization current.
【図6】従来技術の制御装置である。FIG. 6 is a prior art control device.
【図7】従来技術の回転数および通電電流の時間的変化
説明図である。FIG. 7 is an explanatory diagram of changes over time in the number of revolutions and the energization current of the conventional technique.
1 マイコン 2 固定子巻線 3 モータ駆動回路 4 磁極検出素子 6 アンプ 7 アンプ 8 回転数算出手段 9 回転数異常検出手段 10 再起動通電手段 11 正常復帰通電手段 12 回転数異常判別しきい値設定手段 13 遅延時間設定手段 14 正常復帰判別回転数しきい値設定手段 1 Microcomputer 2 Stator winding 3 Motor drive circuit 4 Magnetic pole detection element 6 amplifier 7 amplifier 8 Rotation speed calculation means 9 Rotation speed abnormality detection means 10 Restart energizing means 11 Normal return energizing means 12 Rotation speed abnormality determination threshold value setting means 13 Delay time setting means 14 Normal return determination rotation speed threshold value setting means
フロントページの続き (56)参考文献 特開 平1−255432(JP,A) (58)調査した分野(Int.Cl.7,DB名) H02P 6/08 Continuation of the front page (56) Reference JP-A-1-255432 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) H02P 6/08
Claims (4)
磁極位置を検出する磁極検出素子と、上記磁極検出素子
の出力から上記永久磁石回転子の回転数を算出する回転
数算出手段と、上記回転数が予め設定された回転数しき
い値を一定の回転数異常遅延時間の間超えた時、回転数
異常を判別する回転数異常検出手段と、上記回転数異常
を検出後、小電流を上記ブラシレスモータの固定子巻線
に流し、その後回転数が予め設定された正常復帰回転数
しきい値を超えた時のみ、一定時間幅のパルス状大電流
を通電する再起動通電手段と、その後さらに、上記回転
数しきい値を再び超えた時、正常復帰電流を通電する正
常復帰通電手段とを具備することを特徴とするDCブラ
シレスモータの回転数異常制御装置。1. A magnetic pole detection element for detecting a magnetic pole position of a permanent magnet rotor of a DC brushless motor, a rotation speed calculation means for calculating a rotation speed of the permanent magnet rotor from an output of the magnetic pole detection element, and the rotation. When the number exceeds a preset rotation speed threshold value for a certain rotation speed abnormality delay time, a rotation speed abnormality detecting means for discriminating a rotation speed abnormality, and a small current is detected after detecting the rotation speed abnormality. It is applied to the stator winding of the brushless motor, and then only when the rotation speed exceeds a preset normal rotation speed threshold value, a restarting energizing means for energizing a pulsed large current of a certain time width, and then further A normal rotation energizing means for supplying a normal return current when the rotational speed threshold value is exceeded again, and a rotation speed abnormality control device for a DC brushless motor.
い値を任意に設定できる回転数異常判別しきい値設定手
段を持つことを特徴とする請求項1に記載のDCブラシ
レスモータの回転数異常制御装置。2. The rotation of the DC brushless motor according to claim 1, further comprising rotation speed abnormality determination threshold value setting means capable of arbitrarily setting the rotation speed threshold value for determining the rotation speed abnormality. Number abnormal control device.
電時間を任意に設定できる遅延時間設定手段を持つこと
を特徴とする請求項1、2に記載のDCブラシレスモー
タの回転数異常制御装置。3. The rotation speed abnormality control of the DC brushless motor according to claim 1, further comprising a delay time setting means capable of arbitrarily setting a conduction time of the pulsed large current for the restart conduction. apparatus.
帰回転数しきい値を任意に設定できる正常復帰判別回転
数しきい値設定手段を持つことを特徴とする請求項1、
2、3に記載のDCブラシレスモータの回転数異常制御
装置。4. A normal-return determination rotation speed threshold value setting means capable of arbitrarily setting the normal-return rotation speed threshold value for judging the normal return rotation speed.
2. A rotation speed abnormality control device for a DC brushless motor as described in 2 and 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22774895A JP3485686B2 (en) | 1995-09-05 | 1995-09-05 | Abnormal control device for rotation speed of DC brushless motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22774895A JP3485686B2 (en) | 1995-09-05 | 1995-09-05 | Abnormal control device for rotation speed of DC brushless motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0974789A JPH0974789A (en) | 1997-03-18 |
JP3485686B2 true JP3485686B2 (en) | 2004-01-13 |
Family
ID=16865760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22774895A Expired - Fee Related JP3485686B2 (en) | 1995-09-05 | 1995-09-05 | Abnormal control device for rotation speed of DC brushless motor |
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Country | Link |
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JP (1) | JP3485686B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118100745B (en) * | 2024-04-25 | 2024-08-06 | 深圳核心医疗科技股份有限公司 | Self-starting method of motor, ventricular assist device, medical equipment and storage medium |
-
1995
- 1995-09-05 JP JP22774895A patent/JP3485686B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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JPH0974789A (en) | 1997-03-18 |
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