JPS6096192A - Brushless motor - Google Patents
Brushless motorInfo
- Publication number
- JPS6096192A JPS6096192A JP58202341A JP20234183A JPS6096192A JP S6096192 A JPS6096192 A JP S6096192A JP 58202341 A JP58202341 A JP 58202341A JP 20234183 A JP20234183 A JP 20234183A JP S6096192 A JPS6096192 A JP S6096192A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- potential side
- induced voltage
- switch
- brushless motor
- 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.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims abstract description 19
- 230000010349 pulsation Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000010363 phase shift Effects 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
- H02P6/06—Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
この発明は誘起電圧によって磁石回転子と駆動巻線との
間の位置を検出するようにしたブラシレスモータに関す
る。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a brushless motor in which the position between a magnet rotor and a drive winding is detected by induced voltage.
（ロ）従来技術
従来例を第１図に基づいて説明すると、（１）＆ま永久
磁石をもつ磁石回転子であり、その回転位置に応じて３
相の駆動巻線（２ａ ）（２ｂ ） （２ｃ ）の電流
が断続制御される。電流の断続は直流電源（３）の出力
電流を、６個のスイッチ素子（４ａ）（４ｂ）（４ｃ）
（５ａ）（５ｂＸ５ｃ）で３相のブリッジ接続されるス
イッチ（６）をオン・オフさせて行なう。（力はスイッ
チ（６）をオン・オフさせるドライブ回路である。（８
）は駆動巻線（２ａ）（２ｂＸ２ｃ）の入力側に接続さ
れた位置検出回路で、この位置検出回路には誘起電圧の
脈動を減衰させるＣＲフィルターが設けられている。(b) Prior art The conventional example is explained based on Fig. 1. (1) It is a magnet rotor with permanent magnets, and the
The currents in the phase drive windings (2a), (2b), and (2c) are controlled intermittently. For intermittent current, the output current of the DC power supply (3) is controlled by six switching elements (4a) (4b) (4c).
(5a) (5bX5c) turns on and off the three-phase bridge-connected switch (6). (The power is a drive circuit that turns the switch (6) on and off. (8
) is a position detection circuit connected to the input side of the drive windings (2a) (2bX2c), and this position detection circuit is provided with a CR filter for attenuating the pulsation of the induced voltage.
（９）はチョッピング信号回路で、スイッチ群（６）の
導通期間を調節して駆動巻線（２ａ）（２ｂ）（２ｃ）
に印加される電圧を変化させている。(9) is a chopping signal circuit that adjusts the conduction period of the switch group (6) to control the drive windings (2a), (2b), and
changing the voltage applied to the
この構造のブラシレスモータでは駆動巻線（２ａ）（２
ｂ）（２ｃ）に発生する誘起電圧がスイッチ（６）のチ
ョッピングにより脈動して、磁石回転子（１）の位置検
出が難しくなるのを、ＣＲフィルターで誘起電圧の脈動
を減衰して磁石回転子（１）の位置が検出されるように
なっている。In a brushless motor with this structure, drive windings (2a) (2
b) The induced voltage generated in (2c) pulsates due to the chopping of the switch (6), making it difficult to detect the position of the magnet rotor (1). The position of the child (1) is detected.
しかしながら、誘起電圧の脈動を減衰させるＣＲフィル
ターはこのＣＲフィルターの入力信号と出力信号との位
相をずらすため、実際の回転子位置と位置検出信号とに
位相のずれが生じ、正確な位置検出を難かしくしていた
。However, since the CR filter that attenuates the pulsation of the induced voltage shifts the phase of the input signal and output signal of the CR filter, a phase shift occurs between the actual rotor position and the position detection signal, making accurate position detection impossible. I was making it difficult.
（ハ）発明の目的
この発明は上記の点に鑑み、誘起電圧を利用して磁石回
転子と駆動巻線との間の相対位置を検出し、安定なブラ
シレスモータの制御運転を可能にすることを目白りとす
る。(c) Purpose of the invention In view of the above points, the present invention detects the relative position between a magnet rotor and a drive winding using induced voltage, and enables stable controlled operation of a brushless motor. The eyes become white.
に）発明の構成
この発明の構成は駆動巻線を制御するスイッチの中、電
源に接続された正電位側のスイッチ群と負電位側のスイ
ッチ群とを有し、これらの正電位側のスイッチ群と負電
位側のスイッチ群との中で導通しているスイッチをチョ
ッピングさせ、正電位側のスイッチと負電位側のスイッ
チとのチョッピングの切り慎えを、誘起電圧信号を利用
して行なうものである。B) Structure of the Invention The structure of the present invention includes a group of switches on the positive potential side and a group of switches on the negative potential side connected to a power source among the switches for controlling the drive winding, and these switches on the positive potential side. A device that uses an induced voltage signal to chop the conductive switches in the switch group and the switch group on the negative potential side, and to avoid chopping between the switches on the positive potential side and the switches on the negative potential side. It is.
この構成をもつブラシレスモータは各スイッチ肝σ〕テ
コツヒンクにより誘起電圧か脈動しても、位置検出に影
響をあたえない方向に脈動が生じるようにしたものであ
る。In a brushless motor having this configuration, even if the induced voltage pulsates due to the lever of each switch, the pulsation occurs in a direction that does not affect position detection.
（ホ）実施例
以下この発明を第２図乃至第４図に示す実施例に基づい
て説明する。(e) Examples The present invention will be explained below based on the examples shown in FIGS. 2 to 4.
この発明を示す第２図の制御回路は磁石回転子（１）の
回転位置に応じて駆動巻線（２ａ）（２ｂ）（２ｃ）の
電流を断続制御するスイッチ（６）と、駆動巻線（２ａ
）（２ｂ）（２ｃ）の入力側に接続された位置検出回路
（８）と、この位置検出回路からの信号を比較して波形
整形するコンパレータα〔と、このコンバレータカらの
信号でドライブ回路（７）によりスイッチ（６）が各々
導通させられるタイミング信号を発生させるスイッチ群
分配信号発生回路αυと、コンパレータ（１０）からの
信号でチョッピングするスイッチ（６）を決めるチョッ
ピング回路（９）とにより構成されている。The control circuit of FIG. 2 showing this invention includes a switch (6) that controls the current of the drive winding (2a), (2b), and (2c) intermittently according to the rotational position of the magnet rotor (1), and (2a
) (2b) (2c) A position detection circuit (8) connected to the input side of (2c), a comparator α [that compares the signal from this position detection circuit and shapes the waveform], and a drive circuit ( Consisting of a switch group distribution signal generation circuit αυ that generates a timing signal that makes each switch (6) conductive by 7), and a chopping circuit (9) that determines which switch (6) to chop based on the signal from the comparator (10). has been done.
第４図はこれらの信号関係を示す図である。位置検出回
路（８）からの出力信号は駆動巻線（２ａＸ２ｂ）（２
ｃ）に発生する誘起電圧の信号Ｓ１ と直流電源（３）
の定電圧の信号Ｓ２とであり、この信号は（ａ）に示す
とおりである。信号Ｓ１と信号Ｓ、とを比較してコンパ
レータｕＱから出力される信号Ｓ。は（ｂｌのように波
形整形される。スイッチ（６）ナオン・オフさせて発生
ずる転流信号は（Ｃ）、（ｄ）及び（ｅ）に示すとおり
で、ともに電気角で１２０°の幅を有し、それぞれ１２
０°の位相差を持っている。転流信号により駆動巻線（
２ａＸ２ｂ）（２ｃ）に流れる電流は（ｆ）、（ｇ）及
び（ｈ）に示すとおりで、スイッチ（６）の導通時間よ
りも誘起電圧の分導通時間が長くなる。FIG. 4 is a diagram showing the relationship between these signals. The output signal from the position detection circuit (8) is sent to the drive winding (2aX2b) (2
c) Signal S1 of induced voltage generated in DC power supply (3)
and a constant voltage signal S2, and this signal is as shown in (a). Signal S is output from comparator uQ by comparing signal S1 and signal S. is shaped into a waveform as shown in (bl). The commutation signals generated by turning switch (6) on and off are as shown in (C), (d), and (e), all of which have a width of 120° in electrical angle. and 12 each
It has a phase difference of 0°. The drive winding (
The current flowing through 2aX2b) (2c) is as shown in (f), (g), and (h), and the conduction time is longer than the conduction time of the switch (6) by the amount of the induced voltage.
このように構成されたブラシレスモータにおいて、駆動
巻線（２ａ）（２ｂＸ２ｃ）に流れる゛電流をチョッピ
ング回路（９）でチョッピングさせて磁石回転子（１）
の回転数を制御する場合、誘起電圧が脈動を起こしても
コンパレータ（１１に供給される信号Ｓ１と信号Ｓ、と
はこのコンパレータからの出力信号Ｓｏ が反転しない
ようになっている。すなわち、位置検出回路（８）から
の信号Ｓ２に対して信号Ｓ。In the brushless motor configured in this way, the current flowing through the drive windings (2a) (2bX2c) is chopped by the chopping circuit (9) and the magnet rotor (1)
When controlling the rotational speed of the comparator (11), the signals S1 and S supplied to the comparator (11) are designed so that the output signal So from this comparator will not be inverted even if the induced voltage pulsates. Signal S for signal S2 from the detection circuit (8).
の電位が高いときに、負電位側に接続されたスイッチ素
子（５ａ）（５ｂＸ５ｃ）の中、導通しているスイッチ
素子をチョッピング回路（９）でチョッピングさせると
、負電位側のスイッチ素子（５ａ）（５ｂ）（５ｃ）が
遮断されるから、信号Ｓ１は正の電位側に引き上げられ
信号Ｓ２と信号Ｓ１との電位差が大きくなる方向に出力
され、脈動でコンノくレータａ〔の出力信号Ｓ。が反転
しないようになっている。また、信号Ｓ２に対して信号
Ｓ１の電位が低いときに、正電位側に接続されたスイ・
ノチ素子（４ａ）（４ｂ）（４Ｃ）の中、導通している
スイッチ素子をチョッピング回路（９）でチョッピング
させると、正電位側のスイッチ素子（４ａ）（４ｂ）（
４ｃ）が遮断されるから、信号Ｓｌ は負の′電位側に
引き下げられ信号Ｓ２と信号ＳＩ との電位差が大きく
なる方向に出力され、脈動でコンパレータα０）の出力
信号Ｓ。が反転しな〜・ようになっている。チョッピン
グさせるスイッチ（６）を切り替えるタイミングは誘起
電圧の信号Ｓ１と定電圧の信号Ｓ２との電位差がＯとな
る交点で行なう。When the potential of ) (5b) and (5c) are cut off, the signal S1 is pulled up to the positive potential side and output in the direction in which the potential difference between the signal S2 and the signal S1 increases, and the output signal S of the controller a due to the pulsations increases. . is designed not to be reversed. Also, when the potential of the signal S1 is lower than the signal S2, the switch connected to the positive potential side
When the switching elements (4a) (4b) (4C) that are conducting are chopped by the chopping circuit (9), the switching elements (4a) (4b) (4C) on the positive potential side will be chopped.
4c) is cut off, the signal Sl is pulled down to the negative potential side and output in a direction that increases the potential difference between the signal S2 and the signal SI, and the output signal S of the comparator α0) is pulsated. is not reversed. The timing for switching the chopping switch (6) is performed at the intersection point where the potential difference between the induced voltage signal S1 and the constant voltage signal S2 becomes O.
（へ）発明の効果
コノ発明のブラシレスモータは駆動巻線を制御するスイ
ッチの中、電源に接続された正電位側のスイッチ群と負
電位側のスイッチ群とを有し、これらの正電位側のスイ
ッチ群と負電位側のスイッチ群との中で導通しているス
イッチをチョッピングさせ、谷スイッチのチョッピング
により誘起電圧信号が脈動を起こしても、この脈動が位
置検出に影響をあたえない方向に作用するようにしたの
であるから、従来のように位相のずれるフィルターで脈
動を減衰する必要がなく、誘起電圧信号をそのまま利用
して、駆動巻線と磁石回転子との相対位置が検出できる
よう罠なっている。(F) Effects of the Invention The brushless motor of the present invention has a positive potential side switch group and a negative potential side switch group connected to a power source among the switches that control the drive winding, and these positive potential side By chopping the conductive switches in the switch group of the switch group and the switch group on the negative potential side, even if the induced voltage signal pulsates due to the chopping of the valley switch, this pulsation will not affect position detection. This makes it possible to detect the relative position between the drive winding and the magnet rotor by directly using the induced voltage signal, without the need to attenuate the pulsation with a phase-shifted filter like in the past. It's becoming a trap.
第１図は従来のブラシレスモータの開側１回路図、第２
図はこの発明の一実施例を示すノ°ラシレスモータの制
御回路図、第３図はこの発明の位置検出回路の電気回路
図、第４図はこの発明の実施例の各部の動作波形図であ
る。
（１）−・・磁石回転子、（２ａ）（２ｂ）（２ｃ）
−駆動巻線、（４ａ）（４ｂＸ４ｃ）（５ａ）（５ｂ）
（５ｃ）・・スイッチ素子、（６）・・・スイッチ。
第１図
第３図Figure 1 shows the open side 1 circuit diagram of a conventional brushless motor, and the 2nd diagram shows the open side circuit diagram of a conventional brushless motor.
The figure is a control circuit diagram of a brushless motor showing an embodiment of the present invention, Fig. 3 is an electric circuit diagram of a position detection circuit of the present invention, and Fig. 4 is an operation waveform diagram of each part of the embodiment of the present invention. . (1) --- Magnet rotor, (2a) (2b) (2c)
- Drive winding, (4a) (4bX4c) (5a) (5b)
(5c)...Switch element, (6)...Switch. Figure 1 Figure 3
Claims (1)
圧を利用してこの駆動巻線を制御するブラシレスモータ
において、駆動巻線をｔｔｉ制御するスイッチの中、電
源に接続された正電位側のスイッチ群と負電位側のスイ
ッチ群とを有し、これらの正電位側のスイッチ群と負電
位側のスイッチ群との中で導通しているスイッチをチョ
ッピングさせ、正電位側のスイッチと負電位側のスイッ
チとのチョッピングの切り換えを、誘起電圧信−号を第
１」用して行なうことを特徴とするブラシレスモータ。1. In a brushless motor that controls the drive winding using the induced voltage generated in the drive winding due to the rotation of the magnet rotor, the positive potential side connected to the power supply is inside the switch that controls the drive winding. It has a switch group on the positive potential side and a switch group on the negative potential side, and chops the conductive switches between the positive potential side switch group and the negative potential side switch group, and the switch group on the positive potential side and the negative potential side switch group. A brushless motor characterized in that chopping switching with a switch on the potential side is performed using an induced voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58202341A JPS6096192A (en) | 1983-10-27 | 1983-10-27 | Brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58202341A JPS6096192A (en) | 1983-10-27 | 1983-10-27 | Brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6096192A true JPS6096192A (en) | 1985-05-29 |
Family
ID=16455930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58202341A Pending JPS6096192A (en) | 1983-10-27 | 1983-10-27 | Brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6096192A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5362344A (en) * | 1976-11-17 | 1978-06-03 | Hitachi Ltd | Apparatus for protecting air conditioner |
| JPS5863090A (en) * | 1981-10-06 | 1983-04-14 | Hitachi Ltd | Brushless motor torque ripple suppressor |
-
1983
- 1983-10-27 JP JP58202341A patent/JPS6096192A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5362344A (en) * | 1976-11-17 | 1978-06-03 | Hitachi Ltd | Apparatus for protecting air conditioner |
| JPS5863090A (en) * | 1981-10-06 | 1983-04-14 | Hitachi Ltd | Brushless motor torque ripple suppressor |
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