JPH01318578A - Drive circuit for brushless motor - Google Patents
Drive circuit for brushless motorInfo
- Publication number
- JPH01318578A JPH01318578A JP63148968A JP14896888A JPH01318578A JP H01318578 A JPH01318578 A JP H01318578A JP 63148968 A JP63148968 A JP 63148968A JP 14896888 A JP14896888 A JP 14896888A JP H01318578 A JPH01318578 A JP H01318578A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- brushless motor
- circuit
- torque
- output signal
- 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
- 238000000034 method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical group [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ブラシレスモータの駆動回路に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a drive circuit for a brushless motor.
〔発明の1既要〕
本発明は、回転子の位置を検出する検出器とこの検出器
の出力信号を処理する信号処理回路と、この出力を得て
電機子コイルに電流を流すためのスイッチング回路とを
備えたブラシレスモータの駆動回路において、前記信号
処理回路にヒステリシス特性を持たせることによりモー
タの通電角を制御し、モータの起動性の改善、モータの
効率の改善、モータ設計の筒易化を行うものである。[1 Summary of the Invention] The present invention provides a detector for detecting the position of a rotor, a signal processing circuit for processing an output signal of this detector, and a switching system for obtaining this output and passing a current through an armature coil. In a brushless motor drive circuit equipped with a circuit, the signal processing circuit is provided with hysteresis characteristics to control the energization angle of the motor, thereby improving motor startability, motor efficiency, and ease of motor design. It is the one that carries out the transformation.
まず従来からの課題として、モータの不起動点つまり死
点の問題があり、それについて説明する。First, as a conventional problem, there is the problem of the motor's non-starting point, that is, the dead point, and this will be explained.
回転子の位置検出器が1個のブラシレスモータの原理は
第11図[al〜telのごとくである。The principle of a brushless motor with one rotor position detector is shown in FIG. 11 [al to tel].
すなわち、第11図[alは駆動回路を示している。That is, FIG. 11 [al indicates a drive circuit.
第11図fblにおいて回転子の位置検出器H3はN極
を検知し電機子コイルし24′を励磁してS極を作り矢
示aのようにCCW方向に回転子1を回転させる。第1
1図telにおいて検出器H3は無磁界となり、L+4
及びL24′に電流は流れないが回転子1は慣性でCC
W方向へ回り続ける。第11図+dlにおいて、検出器
H3はS極を検知し、L、 4を励磁してS極を作り
CCW方向に回転子1を回転させる。In FIG. 11fbl, the rotor position detector H3 detects the north pole, excites the armature coil 24', creates the south pole, and rotates the rotor 1 in the CCW direction as shown by arrow a. 1st
In Figure 1 tel, the detector H3 has no magnetic field, and L+4
Although no current flows through L24' and L24', rotor 1 is CC due to inertia.
Continue turning in the W direction. In FIG. 11+dl, the detector H3 detects the south pole, and excites L and 4 to create the south pole and rotate the rotor 1 in the CCW direction.
以上のようにして回転子1は連続回転する。この時の発
生トルクは第11図(elのようになり死点6が発生す
る。As described above, the rotor 1 rotates continuously. The generated torque at this time is as shown in FIG. 11 (el), and a dead center 6 occurs.
これは第11図(C1で示される回転中にトルクが現れ
ない位置に起因する。この死点において、モータは起動
することができず問題であった。そこで、これを改良し
て従来から実施されている方式に第12図(at〜(C
1がある。第12図(alでは固定子鉄芯5の突極部分
のギャップ部7の長さを変化させることにより、第12
図telの無励磁トルク(B)を発生させ、これと励る
イ1トルク(A)の合成を行うことによって死点6を無
くしている。This is due to the position where no torque appears during rotation, as shown in Figure 11 (C1).At this dead center, the motor could not be started, which was a problem.Therefore, this was improved and implemented as before. Figure 12 (at ~ (C
There is 1. FIG.
The dead center 6 is eliminated by generating the non-excitation torque (B) shown in the figure and combining this with the exciting torque (A).
しかし、この従来の方法第12図(al〜telでは固
定子鉄芯5の突極部分のギャップ部7の長さを変化させ
て死点を無くしているため、モータの効率が犠牲になる
(ギャップ部7の長さが大きくなる)、また回転方向を
逆にするには裏返しの固定子鉄芯5が必要となる。固定
子鉄芯5の突極部分の形状が複雑なため設計と評価に多
くの時間を必要とする等の欠点を存していた。However, in this conventional method (FIG. 12), the length of the gap 7 of the salient pole portion of the stator iron core 5 is changed to eliminate the dead center, so the efficiency of the motor is sacrificed ( (The length of the gap portion 7 becomes larger), and in order to reverse the rotation direction, it is necessary to turn the stator core 5 upside down.Since the shape of the salient pole portion of the stator core 5 is complicated, it is difficult to design and evaluate it. However, it has disadvantages such as requiring a lot of time.
本発明は上記ブラシレスモーフの効率が悪いこと、逆回
転が容易でないこと、固定子鉄芯の突極部分の形状設計
が容易でないこと等の欠点を除去し、起動性が良好で設
計が容易な効率の良いブラシレスモーフを作るための駆
動回路を提供することを目的としたものである。このた
め本発明では、ブラシレスモーフの回転子の位置ヰ★出
器の出力信号を処理する信号処理回路にヒステリシス特
性を持たせることにより、モータの通電角を自由に制御
できるようにした。The present invention eliminates the disadvantages of the brushless morph, such as poor efficiency, difficulty in reverse rotation, and difficulty in designing the shape of the salient pole portion of the stator core, and achieves good starting performance and easy design. The purpose is to provide a drive circuit for creating an efficient brushless morph. Therefore, in the present invention, the energization angle of the motor can be freely controlled by providing a hysteresis characteristic to the signal processing circuit that processes the output signal of the position generator of the rotor of the brushless morph.
第1図乃至第7図により本発明の作用について説明する
。ブラシレスモーフの永久磁石回転子1は一般に第2図
のように正弦波状に着磁されている。一方、回転子lの
位置検出器3として現在−般的に使用されているものに
は、磁電変換方式のものとしてホール素子がある。先ず
始めにモータの起動時において第4図の回路を与える。The operation of the present invention will be explained with reference to FIGS. 1 to 7. The brushless morph permanent magnet rotor 1 is generally magnetized in a sinusoidal manner as shown in FIG. On the other hand, as a position detector 3 for the rotor 1, there is a Hall element which is of a magneto-electric conversion type and is currently commonly used. First, the circuit shown in FIG. 4 is provided at the time of starting the motor.
すると、第3図のようなヒステリシス特性H6及びH,
を有する信号処理回路○P、及びOP2に加えられ、O
P2の出力信号はOP、で反転されてコイルに’R?A
を流すためのスイッチング回路Q1及びC2へ加えられ
る。ヒステリシス特性H,及びHzによりモーフ・“の
1ifI電角は電気角で01 +θ2 +θ3+θ、だ
L十増加するため、合成出力トルクT、 十T、は第
5図のようになり、回転角全周に渡って正の起動トルク
を発生し死点を生じない。一方、モータが起動1.一定
の回転数に到達した時、第6図の回路を与える。位置検
出器の出力信号は第4図と同様に信号処理回路op、、
opz、opxを経てスイッチング回路Q3及びC4へ
加えられる。Then, the hysteresis characteristics H6 and H, as shown in FIG.
is added to the signal processing circuit ○P and OP2 having
The output signal of P2 is inverted at OP and sent to the coil 'R? A
is applied to switching circuits Q1 and C2 for flowing . Due to the hysteresis characteristics H and Hz, the 1ifI electrical angle of the morph increases by 01 + θ2 + θ3 + θ in electrical angle, so the composite output torque T, 10T, becomes as shown in Figure 5, and the total rotation angle is A positive starting torque is generated over the period of time and no dead center occurs.On the other hand, when the motor starts up and reaches a certain rotation speed, the circuit shown in Figure 6 is applied.The output signal of the position detector is shown in Figure 4. Similarly, the signal processing circuit op,
It is applied to switching circuits Q3 and C4 via opz and opx.
この時モータの通電角は起動時とは逆にθ1 +θ2+
θ3+θ4だけ減少するため、合成出力トルク’r3+
Tmは第7図のようになり効率が2π
る。At this time, the energization angle of the motor is θ1 +θ2+
Since it decreases by θ3+θ4, the composite output torque 'r3+
Tm is as shown in FIG. 7, and the efficiency is 2π.
以下、本発明の実施例を図面に基づいて説明する。第1
図は4極4コイル4の有鉄芯5を固定子としたアウター
ロータのブラシレスモーフの断面図である。永久磁石回
転子1の位置を検出する位置検出器3の出ツノ信号は、
第4図又は第6図の信号処理回路OP、とOP zから
OP、に加えら才1゜た後、スイッチング回路Q4.0
2尺はQ、、Q、、、に伝えられ、電機子コイル4に電
流を流すことにより固定子鉄芯5を磁化し、永久磁石回
転子1に回転トルクを発生させ回転させる。Embodiments of the present invention will be described below based on the drawings. 1st
The figure is a sectional view of a brushless morph of an outer rotor in which a stator is a ferrous core 5 of 4 poles and 4 coils. The output signal of the position detector 3 that detects the position of the permanent magnet rotor 1 is
After adding 1° to the signal processing circuits OP and OPz to OP of FIG. 4 or FIG. 6, the switching circuit Q4.0
The two feet are transmitted to Q, , Q, , and by passing current through the armature coil 4, the stator iron core 5 is magnetized, and a rotational torque is generated in the permanent magnet rotor 1, causing it to rotate.
第8図は本発明を適用した別の実施例で2極2コイルの
有鉄芯ブラシレスモータの断面図であり、駆動回路その
他は第2図乃至第7図と共通である。FIG. 8 is a sectional view of a two-pole, two-coil iron-core brushless motor according to another embodiment of the present invention, and the drive circuit and other components are the same as those in FIGS. 2 to 7.
第9図と第10図は4極2コイルの偏平型無鉄芯ブラシ
レスモーフの例で永久磁石回転子(第9図)と固定子(
第10図)であり、駆動回路その他は第2図乃至第7図
と共通である。Figures 9 and 10 are examples of flat type ironless core brushless morphs with 4 poles and 2 coils, including a permanent magnet rotor (Figure 9) and a stator (
(FIG. 10), and the drive circuit and other components are the same as those in FIGS. 2 to 7.
以上、本発明は回転子の位置を検出する検出器と、この
検出器の出力信号を処理する信号処理回路と、そこから
得た信号により電機子コイルに電流を流すためのスイッ
チング回路とを備えたブラシレスモーフの駆動回路にお
いて、種信号処理回路はヒステリシス特性を持たせるこ
とにより、モータの通電角の制御を可能にした。例えば
、通電角を2π(電気角)より増大させることにより、
ブラシレスモーフの死点が無くなり起動性が良好となる
ものである。又、有鉄芯ブラシレスモークの固定子鉄芯
突極部のギャップ長を一定にできるので形状設計が容易
であるとともに効率が良い。As described above, the present invention includes a detector that detects the position of the rotor, a signal processing circuit that processes the output signal of this detector, and a switching circuit that causes current to flow through the armature coil based on the signal obtained from the detector. In the brushless morph drive circuit, the seed signal processing circuit has hysteresis characteristics, making it possible to control the energization angle of the motor. For example, by increasing the conduction angle from 2π (electrical angle),
This eliminates the dead center of the brushless morph and improves start-up performance. Further, since the gap length of the stator iron core salient pole portion of the iron core brushless smoke can be made constant, the shape design is easy and efficient.
又、回転方向を逆転する場合、固定子鉄芯を裏返しにす
る必要もなく、駆動回路の選択により実施できる。又、
回転中には通電角を2π(電気角)より減少させること
によりモータ効率を大幅に向上させることができる。Furthermore, when reversing the rotation direction, there is no need to turn over the stator core, and this can be done by selecting a drive circuit. or,
During rotation, the motor efficiency can be significantly improved by reducing the current conduction angle from 2π (electrical angle).
第1図乃至第7図は本発明の詳細な説明で、第1図は、
本発明に係わるモータの断面図、第2図ロータの着磁極
性図、第3図は信号処理回路の人。
出力特性図、第4図は起動時の状態を示す回路図、第5
図は起動状態における合成トルクの発生する過程を示す
各部の波形図、第6図は回転状態の時の回路図、第7図
は回転状態における各部の波形図である。第8図は本発
明の他の実施例の断面図、第9図は本発明の別の実施例
の回転子の平面図、第10図は第9図に適用される固定
子の平面図である。第11図は、従来の問題点を説明す
る図面でfatは回路図、(b)乃至fdlはロータの
状態を示す平面図、(elは発生トルクと死点を示す特
性図、第12回は、改善された従来のモータの説明図で
、(alは断面図、Tblは回路図、(C1は合成トル
クの発生する特性図である。
1・・・永久磁石回転子
2・・・回転子ヨーク
3・・・位置検出器
4.4′・・・電機子コイル
5・・・固定子鉄芯
以上
不発日月のモータのvfr面図
第 1(2]
ロータの@石EL腸性図 入出力1今4
1図¥52図 第3図本発明の1
tハ冥熊例の西面図
第8図
第9図 第10図
第11図(a)
起ttJ時のローフ171平面図 零検出時ハロー
7の平面図第11図
前 面 図
第12図(a)
回 踏 図
第12図(b)
合バトルフの宅生乞ネす特4生図
第12図(C)
従来の改善3札rs餅面図と回路図と符4生図第」2図1 to 7 are detailed explanations of the present invention, and FIG.
FIG. 2 is a diagram showing the magnetization polarity of the rotor, and FIG. 3 is a diagram showing the signal processing circuit. Output characteristic diagram, Figure 4 is a circuit diagram showing the state at startup, Figure 5
The figure is a waveform diagram of each part showing the process of generating a composite torque in a starting state, FIG. 6 is a circuit diagram in a rotating state, and FIG. 7 is a waveform diagram of each part in a rotating state. FIG. 8 is a sectional view of another embodiment of the present invention, FIG. 9 is a plan view of a rotor of another embodiment of the present invention, and FIG. 10 is a plan view of a stator applied to FIG. 9. be. Fig. 11 is a drawing explaining the conventional problems, fat is a circuit diagram, (b) to fdl are plan views showing the state of the rotor, (el is a characteristic diagram showing the generated torque and dead center, the 12th , is an explanatory diagram of an improved conventional motor, (al is a sectional view, Tbl is a circuit diagram, (C1 is a characteristic diagram where a composite torque is generated. Yoke 3...Position detector 4.4'...Armature coil 5...Stator core or higher Output 1 now 4
Figure 1 ¥52 Figure 3 Figure 1 of the present invention
West view of the example of t Hakuma. a) Turning diagram Figure 12 (b) Special 4 raw map of the match battle turf Figure 12 (C) Conventional improved 3rd bill rs rice cake side diagram and circuit diagram and mark 4 raw diagram 2nd figure
Claims (1)
号を処理する信号処理回路と、該信号処理回路の出力信
号を得て電機子コイルに電流を流すためのスイッチング
回路とを備えたブラシレスモータの駆動回路において、
前記信号処理回路にヒステリシス特性を持たせたことを
特徴とするブラシレスモータの駆動回路。A detector that detects the position of the rotor, a signal processing circuit that processes the output signal of the detector, and a switching circuit that obtains the output signal of the signal processing circuit and causes a current to flow through the armature coil. In the brushless motor drive circuit,
A drive circuit for a brushless motor, characterized in that the signal processing circuit has a hysteresis characteristic.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63148968A JPH01318578A (en) | 1988-06-16 | 1988-06-16 | Drive circuit for brushless motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63148968A JPH01318578A (en) | 1988-06-16 | 1988-06-16 | Drive circuit for brushless motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01318578A true JPH01318578A (en) | 1989-12-25 |
Family
ID=15464695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63148968A Pending JPH01318578A (en) | 1988-06-16 | 1988-06-16 | Drive circuit for brushless motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01318578A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1191677A1 (en) * | 2000-08-24 | 2002-03-27 | Mts Systems Corporation | Brushless direct current motor having supervised rotor position feedback |
CN109687781A (en) * | 2018-12-19 | 2019-04-26 | 杭州湘滨电子科技有限公司 | A method of brshless DC motor maximum (top) speed is improved by the advanced strategy of phase |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58182463A (en) * | 1982-04-16 | 1983-10-25 | Touriyou Denki Kk | Direct current noncontact motor |
JPS61157293A (en) * | 1984-12-28 | 1986-07-16 | Sony Corp | Drive circuit of 3-phase 1-sensor brushless motor |
JPS62287103A (en) * | 1986-06-06 | 1987-12-14 | Mitsubishi Electric Corp | Magnetic pole position detecting circuit |
-
1988
- 1988-06-16 JP JP63148968A patent/JPH01318578A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58182463A (en) * | 1982-04-16 | 1983-10-25 | Touriyou Denki Kk | Direct current noncontact motor |
JPS61157293A (en) * | 1984-12-28 | 1986-07-16 | Sony Corp | Drive circuit of 3-phase 1-sensor brushless motor |
JPS62287103A (en) * | 1986-06-06 | 1987-12-14 | Mitsubishi Electric Corp | Magnetic pole position detecting circuit |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1191677A1 (en) * | 2000-08-24 | 2002-03-27 | Mts Systems Corporation | Brushless direct current motor having supervised rotor position feedback |
CN109687781A (en) * | 2018-12-19 | 2019-04-26 | 杭州湘滨电子科技有限公司 | A method of brshless DC motor maximum (top) speed is improved by the advanced strategy of phase |
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