JPH0218036B2 - - Google Patents
Info
- Publication number
- JPH0218036B2 JPH0218036B2 JP56111879A JP11187981A JPH0218036B2 JP H0218036 B2 JPH0218036 B2 JP H0218036B2 JP 56111879 A JP56111879 A JP 56111879A JP 11187981 A JP11187981 A JP 11187981A JP H0218036 B2 JPH0218036 B2 JP H0218036B2
- Authority
- JP
- Japan
- Prior art keywords
- drive
- windings
- circuit
- winding
- auxiliary
- 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 - Lifetime
Links
- 238000004804 winding Methods 0.000 claims description 61
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 5
- 238000004904 shortening Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/24—Arrangements for stopping
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Description
【発明の詳細な説明】
本発明は、DCブラシレスモータの駆動制御回
路に係り、特に起動停止時の負荷が大きい用途に
適した駆動回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive control circuit for a DC brushless motor, and particularly to a drive circuit suitable for applications where the load at the time of starting and stopping is large.
特に磁気デイスク装置のスピンドル駆動装置と
して使用すると有用であるが、これに限定される
ことはない。 It is particularly useful when used as a spindle drive device for a magnetic disk device, but is not limited thereto.
第１図に示すような磁気デイスク装置において
磁気デイスク１へのデータの書込みおよび磁気デ
イスク１からのデータの読み取りを行なう磁気ヘ
ツド２は、磁気デイスク１が停止または低速回転
中は磁気デイスク１と接触していて、或る回転数
以上になると浮上するCSS（コンタクトスタート
ストツプ）方式が採用されている。そのため磁気
デイスク１が回転し始めてから磁気ヘツド２が浮
上するまでの時間（以後ヘツド浮上時間と呼ぶ）
はヘツドスライダの寿命、磁気デイスク１の表面
の損傷防止のために極力短いことが要求される。
これをスピンドル駆動用モータ３の立場で見ると
慣性モーメントの大きい磁気デイスクを素早く起
動停止しなければならず、式(1)
TR……起動トルク
JR＝Ｊdω／dt Ｊ……負荷慣性モーメント (1)
ω……角速度
からも判るように大きな起動トルク（または停止
トルク）を必要とする。また、モータの誘起電圧
定数をKE、巻線抵抗をRa、モータ端子間電圧を
Ｖとし、簡単のためにインダクタンスによる項を
無視すれば
Ｖ＝KEω＋RaIa (2)
であり、式(2)から判るように起動開始時ω＝０よ
りモータの巻線電流Iaとして、瞬間
Iapeak＝Ｖ／Ra (3)
なる大電流が流れる。以後、回転数上昇に伴ない
Ia＝Ｖ−KEω／Ra (4)
で表わされる電流が流れる。 In the magnetic disk device shown in FIG. 1, the magnetic head 2, which writes data to and reads data from the magnetic disk 1, is in contact with the magnetic disk 1 when the magnetic disk 1 is stopped or rotating at low speed. It uses a CSS (contact start/stop) system that causes the engine to float when the rotation speed exceeds a certain level. Therefore, the time from when the magnetic disk 1 begins to rotate until when the magnetic head 2 floats (hereinafter referred to as head flying time)
is required to be as short as possible for the life of the head slider and to prevent damage to the surface of the magnetic disk 1.
Looking at this from the standpoint of the spindle drive motor 3, it is necessary to quickly start and stop the magnetic disk with a large moment of inertia, and the formula (1) T R ... Starting torque J R = Jdω/dt J ... Load moment of inertia (1) ω...As can be seen from the angular velocity, a large starting torque (or stopping torque) is required. Also, let K E be the induced voltage constant of the motor, Ra be the winding resistance, and V be the voltage between the motor terminals, and if we ignore the term due to inductance for simplicity, we get V=K E ω+R a I a (2), As can be seen from equation (2), at the start of startup, from ω=0, a large current instantaneously flows as the motor winding current I a as I apeak =V/R a (3). Thereafter, as the rotational speed increases, a current expressed by I a =V-K E ω/R a (4) flows.
モータ発生トルクTgは
Tg＝KEIa (5)
であり、TRαTg故、Iapeak及び低速域でのIaが大
きいことは、ヘツド浮上時間を短くし得る。しか
しながら、Iapeakは定常回転時の電流に比して非
常に大（約10〜15倍程度）であり、このIapeak及
び低速回転域での大電流を流し得るモータ巻線駆
動用のパワートランジスタ及び電源による大幅な
コストアツプは避けられない。 The motor-generated torque T g is T g =K E I a (5) and T R αT g Therefore, large I a peak and I a in the low speed range can shorten the head flying time. However, I apeak is very large (approximately 10 to 15 times) compared to the current during steady rotation, and a power transistor for driving motor windings that can flow this I apeak and a large current in the low speed rotation range. A significant cost increase due to power supply and power supply is unavoidable.
この対策として、従来は過電流検出回路を付加
して低速回転域での大電流をおさえる方法等が実
施されているが、ヘツド浮上時間の増大は否めな
い。 Conventionally, as a countermeasure against this problem, a method has been implemented in which an overcurrent detection circuit is added to suppress the large current in the low speed rotation range, but this inevitably increases the flying time of the head.
本発明はそのような点に鑑みて起動時のＩ ａ
peak低速回転時の大電流を自動的におさえ、
かつヘツド浮上時間を短くし得るに最適なスピン
ドル駆動用のDCブラシレスモータ駆動制御回路
を提供するものである。 In view of such points, the present invention provides Ia at startup.
Automatically suppresses large current during peak low speed rotation,
The present invention also provides a DC brushless motor drive control circuit for spindle drive that is optimal for shortening head flying time.
また本発明の別の目的は、停止時のヘツド摺動
時間を短縮することにある。ヘツド摺動時間の短
縮はヘツド浮上時間短縮と同様な意義を有する。 Another object of the present invention is to shorten the head sliding time when stopped. Reducing the head sliding time has the same significance as reducing the head flying time.
停止時には、慣性モーメントの大きいデイスク
が停止特性を悪化させるため、逆転制動、発電制
動等の衆知の技術が利用されているが、低速域で
の効果は高速域ほどではなく、ヘツド摺動時間の
短縮に与える効果は小さい。 When stopping, a disk with a large moment of inertia worsens the stopping characteristics, so well-known techniques such as reverse braking and dynamic braking are used, but the effectiveness at low speeds is not as great as at high speeds, and the head sliding time is The effect on shortening is small.
本発明は、これを改善したものであり、その特
徴とするところは、界磁ロータと複数個の駆動巻
線および、該駆動巻線と直列に設けられた複数個
の補助巻線をを有し、前記界磁ロータの位置を検
出して前記各駆動巻線または、前記各駆動巻線お
よび前記各補助巻線の駆動電流を選択的に断続す
る形式のDCブラシレスモータに対する駆動制御
回路であつて、
定常回転時には前記駆動巻線のみに電流を流
し、起動時および制動時の低速回転時には前記駆
動巻線に対して前記補助巻線を直列に接続するた
めのトランジスタ回路あるいはリレー回路と、前
記ロータの回転数に応じて該トランジスタ回路あ
るいはリレー回路の切り換え信号を供給する回転
数検出回路と、を具備したブラシレスモータ駆動
制御回路であり、起動特性および制動特性の向上
を図つたものである。以下これを詳細に説明す
る。 The present invention is an improvement on this, and is characterized by having a field rotor, a plurality of drive windings, and a plurality of auxiliary windings provided in series with the drive windings. and a drive control circuit for a DC brushless motor that detects the position of the field rotor and selectively intermittents the drive current of each of the drive windings or each of the drive windings and each of the auxiliary windings. a transistor circuit or a relay circuit for passing current only through the drive winding during steady rotation, and connecting the auxiliary winding in series with the drive winding during low-speed rotation during startup and braking; This brushless motor drive control circuit is equipped with a rotation speed detection circuit that supplies a switching signal for the transistor circuit or relay circuit according to the rotation speed of the rotor, and is intended to improve starting characteristics and braking characteristics. This will be explained in detail below.
本発明によるDCブラシレスモータ自体の構造
は、従来のものと比較して基本的には駆動巻線よ
りの端子取出し形態を変更したものであつてよく
従つて具体的構造の図示は省略し、以下では本発
明実施例の制御回路を含めた回路図にて説明を行
なう。 The structure of the DC brushless motor itself according to the present invention is basically that the terminal extraction form from the drive winding is changed compared to the conventional one. Next, explanation will be given using a circuit diagram including a control circuit of an embodiment of the present invention.
第２図は３相駆動巻線半波駆動回路での実施例
を示したものである。定常回転時にはコントロー
ル回路１２からの信号で駆動用パワートランジス
タ２１，２２，２３が順次オンとなり、駆動巻線
５，６，７に順次通電されて所定の回転を得てい
る。コントロール回路１２には回転数検出回路１
１からの信号が入力する。この構成に補助駆動巻
線８，９，１０、補助駆動巻線切断用トランジス
タ３２、補助駆動巻線切断信号発生回路３１、補
助駆動巻線誘起電圧遮断用ダイオード４１，４
２，４３，４４を付加し、更に制動用として駆動
巻線５，６，７の短短用リレー５２とリレー駆動
巻線５３の制御用トランジスタ５１を付加する。 FIG. 2 shows an embodiment of a three-phase drive winding half-wave drive circuit. During steady rotation, the drive power transistors 21, 22, and 23 are turned on in sequence by a signal from the control circuit 12, and the drive windings 5, 6, and 7 are sequentially energized to obtain a predetermined rotation. The control circuit 12 includes a rotation speed detection circuit 1
The signal from 1 is input. This configuration includes auxiliary drive windings 8, 9, and 10, an auxiliary drive winding cutting transistor 32, an auxiliary drive winding cutting signal generation circuit 31, and auxiliary drive winding induced voltage cutoff diodes 41, 4.
2, 43, and 44 are added, and a relay 52 for shortening and shortening the drive windings 5, 6, and 7 and a transistor 51 for controlling the relay drive winding 53 are added for braking purposes.
起動時には、補助駆動巻線切断用トランジスタ
１２はカツトオフ状態で駆動巻線５，６，７と補
助駆動巻線８，９，１０とはそれぞれ直列に接続
されていて前者の誘起電圧定数、巻線抵抗をそれ
ぞれKE，Ra、後者のそれらをそれぞれKE′，
Ra′とすれば式(3)，(4)，(5)より
Iapaek＝Ｖ／（Ra＋Ra′） (6)
Ia＝Ｖ−（KE＋KE′）ω／Ra＋Ra′ (7)
Tg＝（KE＋KE′）Ia (8)
となり、起動時突入電流Iapeakを小さく、かつ低
速回転域でのトルクを大きく、すなわち、ヘツド
浮上時間を短くすることが可能である。 At startup, the auxiliary drive winding cutting transistor 12 is in the cut-off state, and the drive windings 5, 6, and 7 and the auxiliary drive windings 8, 9, and 10 are connected in series, respectively, and the induced voltage constant of the former, the winding The resistances are respectively K E and R a , and the latter are respectively K E ′,
If R a ′, from equations (3), (4), and (5), Ia paek = V/(R a +R a ′) (6) I a =V−(K E +K E ′)ω/R a +R a ′ (7) T g = (K E +K E ′) I a (8) This reduces the inrush current I apeak at startup and increases the torque in the low speed rotation range, that is, shortens the head floating time. Is possible.
補助駆動巻線８，９，１０の切断は補助駆動巻
線切断信号発生回路３１の信号により補助駆動巻
線切断用トランジスタ３２をオンさせることによ
り行なわれる。補助駆動巻線切断用トランジスタ
３２がオンしただけでは補助駆動巻線に誘起され
る逆起電圧は、閉ループを形成し正常回転をさま
たげるため、補助駆動巻線誘起電圧遮断用ダイオ
ード４１，４２，４３，４４が必要である。これ
により高速回転域および定常回転が保たれる。こ
のとき制動用リレー制御用トランジスタ５１はオ
ン状態で、制動用リレー駆動巻線５３は通電され
リレー５２は第２図に示す状態にある。補助駆動
巻線８，９，１０の切断時の回転速度ω1は
Ｖ＞（KE＋KE′）ω＋（Ra＋Ra′）Ia
を満たすことが必要である。このω1は補助駆動
巻線のKE′，Ra′及びヘツド浮上時間と密接な関
係にあり、起動時突入電流Iapeakをも考慮した上
で、補助駆動巻線８，９，１０のKE′，Ra′を容
易に決定し得る。 The auxiliary drive windings 8, 9, and 10 are cut by turning on the auxiliary drive winding cutting transistor 32 in response to a signal from the auxiliary drive winding cutting signal generating circuit 31. If only the auxiliary drive winding cutting transistor 32 is turned on, the back electromotive force induced in the auxiliary drive winding will form a closed loop and disturb normal rotation, so the auxiliary drive winding induced voltage cutting diodes 41, 42, 43 , 44 are required. This maintains a high speed rotation range and steady rotation. At this time, the brake relay control transistor 51 is in an on state, the brake relay drive winding 53 is energized, and the relay 52 is in the state shown in FIG. 2. The rotational speed ω 1 of the auxiliary drive windings 8, 9, and 10 at the time of cutting needs to satisfy V>(K E +K E ′)ω+(R a +R a ′)I a . This ω 1 is closely related to K E ′, R a ′ of the auxiliary drive windings, and the head flying time. K E ′ and R a ′ can be easily determined.
補助駆動巻線切断信号発生回路３１は公知の技
術で容易に得られ、その信号源はコントロール回
路１２より容易に得られる。 The auxiliary drive winding cut signal generation circuit 31 can be easily obtained using known techniques, and its signal source can be easily obtained from the control circuit 12.
制動時は、コントロール回路１２によつて駆動
用パワートランジスタ２１，２２，２３とリレ制
御用トランジスタ５１をカツトオフ状態とする。
そのとき各相の駆動巻線５，６，７と補助駆動巻
線８，９，１０とが直列接続となり、リレー制御
用トランジスタ５１がカツトオフ状態となること
により、リレー５２の各接点の切替えが行なわ
れ、各駆動巻線対（例えば５と８）の両端が短絡
される。 During braking, the drive power transistors 21, 22, and 23 and the relay control transistor 51 are cut off by the control circuit 12.
At this time, the drive windings 5, 6, and 7 of each phase and the auxiliary drive windings 8, 9, and 10 are connected in series, and the relay control transistor 51 is cut off, so that each contact of the relay 52 is switched. The ends of each drive winding pair (eg, 5 and 8) are shorted.
このときの制動トルクTBは
TB＝（KE＋KE′）2ω／Ra＋Ra′ (9)
と表わされ、制動特性を向上させ、ヘツド摺動時
間の短縮をもたらす。 The braking torque T B at this time is expressed as T B =(K E +K E ′) 2 ω/R a +R a ′ (9), which improves the braking characteristics and shortens the head sliding time.
本発明による他の実施例として、第３図に示す
ように、第２図の補助駆動巻線切断用トランジス
タ３２、補助駆動巻線誘起電圧遮断ダイオード４
１，４２，４３，４４を補助駆動巻線切断用リレ
ー３４及び補助駆動巻線切断用リレー駆動巻線３
５の制御用トランジスタ３６に置き換えたものが
考えられる。 As another embodiment according to the present invention, as shown in FIG. 3, the auxiliary drive winding cutting transistor 32 of FIG.
1, 42, 43, 44 are the auxiliary drive winding cutting relay 34 and the auxiliary drive winding cutting relay drive winding 3
It is conceivable that the control transistor 36 of No. 5 be replaced.
補助駆動巻線切断用リレー制御トランジスタ３
６のベース信号発生源として切断信号発生回路３
３を有し、これは第２図の補助駆動巻線切断信号
発生回路３１と同種のものである。第３図におい
て補助駆動巻線切断用リレー３４は起動直後ある
いは低速回転時を示し、このとき補助駆動巻線切
断用リレー制御トランジスタ３６はカツトオフ状
態である。回転速度ω1のとき切断信号発生回路
３３からの信号により補助駆動巻線切断用リレー
制御トランジスタ３６がオンとなり、その結果、
補助駆動巻線８，９，１０が駆動巻線５，６，７
より切断される。制動時の動作は第２図の実施例
と基本的には同じであり、リレー３４により駆動
巻線５，６，７と補助駆動巻線８，９，１０とを
直列接続し、かつリレー５２により各駆動巻線対
（例えば５と８）の両端を短絡して制動特性を向
上するものである。 Relay control transistor 3 for auxiliary drive winding disconnection
Cutting signal generation circuit 3 as a base signal generation source of 6
3, which is the same type as the auxiliary drive winding cut signal generating circuit 31 shown in FIG. In FIG. 3, the auxiliary drive winding disconnection relay 34 is shown immediately after startup or during low speed rotation, and at this time the auxiliary drive winding disconnection relay control transistor 36 is in a cut-off state. When the rotational speed is ω 1 , the auxiliary drive winding disconnection relay control transistor 36 is turned on by the signal from the disconnection signal generation circuit 33, and as a result,
Auxiliary drive windings 8, 9, 10 are drive windings 5, 6, 7
more disconnected. The operation during braking is basically the same as the embodiment shown in FIG. This short-circuits both ends of each drive winding pair (for example, 5 and 8) to improve braking characteristics.
以上の説明した通り本発明によれば、起動およ
び制動特性に優れ、低速回転域での大電流の問題
もないブラシレスモータ駆動制御回路を実現でき
るものである。 As described above, according to the present invention, it is possible to realize a brushless motor drive control circuit that has excellent starting and braking characteristics and does not have the problem of large current in a low speed rotation range.
第１図は磁気デイスク装置の構成概略を示す
図、第２図は本発明実施例の回路図（リレー接点
は起動中または定常回転中の状態を示す）、第３
図は本発明の他の実施例の回路図（リレー接点は
起動直後または低速回転中の状態を示す）であ
る。
５，６，７……駆動巻線、８，９，１０……補
助駆動巻線。
Fig. 1 is a diagram showing a schematic configuration of a magnetic disk device, Fig. 2 is a circuit diagram of an embodiment of the present invention (relay contacts are shown in a starting or steady rotation state), and Fig. 3 is a diagram showing a schematic configuration of a magnetic disk device.
The figure is a circuit diagram of another embodiment of the present invention (the relay contact shows the state immediately after startup or during low speed rotation). 5, 6, 7... Drive winding, 8, 9, 10... Auxiliary drive winding.
Claims (1)
動巻線と直列に設けられた複数個の補助巻線をを
有し、 前記界磁ロータの位置を検出して前記各駆動巻
線または、前記各駆動巻線および前記各補助巻線
の駆動電流を選択的に断続する形式のDCブラシ
レスモータに対する駆動制御回路であつて、 定常回転時には前記駆動巻線のみに電流を流
し、起動時および制動時の低速回転時には前記駆
動巻線に対して前記補助巻線を直列に接続するた
めのトランジスタ回路あるいはリレー回路と、 前記ロータの回転数に応じて該トランジスタ回
路あるいはリレー回路の切り換え信号を供給する
回転数検出回路と、 を具備することを特徴とするブラシレスモータ駆
動制御回路。[Claims] 1. A field rotor, a plurality of drive windings, and a plurality of auxiliary windings provided in series with the drive windings, and detecting the position of the field rotor. A drive control circuit for a DC brushless motor that selectively intermittents the drive current of each of the drive windings or each of the drive windings and each of the auxiliary windings, wherein the current flows only to the drive winding during steady rotation. a transistor circuit or a relay circuit for connecting the auxiliary winding in series with the drive winding during low-speed rotation during startup and braking; A brushless motor drive control circuit comprising: a rotation speed detection circuit that supplies a circuit switching signal; and a brushless motor drive control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56111879A JPS5815481A (en) | 1981-07-17 | 1981-07-17 | Dc brushless motor and control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56111879A JPS5815481A (en) | 1981-07-17 | 1981-07-17 | Dc brushless motor and control circuit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5815481A JPS5815481A (en) | 1983-01-28 |
| JPH0218036B2 true JPH0218036B2 (en) | 1990-04-24 |
Family
ID=14572438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56111879A Granted JPS5815481A (en) | 1981-07-17 | 1981-07-17 | Dc brushless motor and control circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5815481A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62207186A (en) * | 1986-03-06 | 1987-09-11 | Mitsubishi Electric Corp | Disk driving device |
| JP4713167B2 (en) | 2005-01-21 | 2011-06-29 | 株式会社日本触媒 | Method for producing water absorbent resin |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5380508A (en) * | 1976-12-24 | 1978-07-17 | Sony Corp | Motors |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52136113U (en) * | 1976-04-12 | 1977-10-15 |
-
1981
- 1981-07-17 JP JP56111879A patent/JPS5815481A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5380508A (en) * | 1976-12-24 | 1978-07-17 | Sony Corp | Motors |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5815481A (en) | 1983-01-28 |
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