JPH0717280Y2 - Hall motor drive circuit - Google Patents
Hall motor drive circuitInfo
- Publication number
- JPH0717280Y2 JPH0717280Y2 JP1985107000U JP10700085U JPH0717280Y2 JP H0717280 Y2 JPH0717280 Y2 JP H0717280Y2 JP 1985107000 U JP1985107000 U JP 1985107000U JP 10700085 U JP10700085 U JP 10700085U JP H0717280 Y2 JPH0717280 Y2 JP H0717280Y2
- Authority
- JP
- Japan
- Prior art keywords
- hall
- operational amplifier
- drive circuit
- motor drive
- hall 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.)
- Expired - Lifetime
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案はホールモータ駆動回路に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a hall motor drive circuit.
（従来技術） 従来のホールモータ駆動回路は、たとえば第２図に示す
如く、回転磁極の極性および磁束の大きさをホール素子
７で検出し、ホール素子７の起電力を演算増幅器８で増
幅してホールモータの第１相の固定子コイル９を駆動し
ている。(Prior Art) In a conventional Hall motor drive circuit, for example, as shown in FIG. 2, the polarity of the rotating magnetic pole and the magnitude of the magnetic flux are detected by the Hall element 7, and the electromotive force of the Hall element 7 is amplified by the operational amplifier 8. Driving the first-phase stator coil 9 of the hall motor.
一方、ホールモータの回転方向を切換えるために、正逆
切換信号がベースに印加されるトランジスタ１、ホール
素子７に流す電流の方向を正逆切換信号に対応して切換
えるトランジスタ２〜５からなる正逆転切換回路６を必
要とした。On the other hand, in order to switch the rotation direction of the hall motor, a transistor 1 to which a forward / reverse switching signal is applied to the base is formed, and a positive / negative transistor 2 to 5 for switching the direction of the current flowing through the hall element 7 in accordance with the forward / reverse switching signal. The reverse rotation switching circuit 6 is required.
このため、駆動回路の構成が複雑で構成部品数も増加す
る欠点があつた。For this reason, there is a drawback that the structure of the drive circuit is complicated and the number of constituent parts is increased.
なお、上記は１相のみを示したがたとえば２相のモータ
の場合は上記と同一構成で第２相の固定子コイルを駆動
する駆動回路を必要とする。このため複雑さは倍にな
る。Although the above description shows only one phase, for example, in the case of a two-phase motor, a drive circuit for driving the second-phase stator coil is required with the same configuration as above. This doubles the complexity.
（考案の目的） 本考案は上記にかんがみなされたもので、上記の問題を
解消してホール素子に流す電流の方向を切換える切換回
路を不要にして正逆転の切換が可能なホールモータ駆動
回路を提供することを目的とする。(Purpose of the Invention) The present invention has been conceived in view of the above, and a hall motor drive circuit capable of switching between forward and reverse rotations by eliminating the above-mentioned problem and eliminating the need for a switching circuit for switching the direction of the current flowing through the hall element. The purpose is to provide.
（考案の実施例） 以下、本考案を実施例により説明する。(Embodiment of the Invention) Hereinafter, the present invention will be described with reference to an embodiment.
第１図は本考案の一実施例の構成を示す回路図である。
なお、第１相分のみを示してある。FIG. 1 is a circuit diagram showing the configuration of an embodiment of the present invention.
Only the first phase is shown.
ホール素子７からのホール起電力は抵抗10を介して演算
増幅器８の反転入力端子に印加し、またホール素子７か
らのホール起電力は抵抗11と抵抗12との直列回路を介し
て演算増幅器８の非反転入力端子に印加する。なお、抵
抗14は帰還抵抗である。The Hall electromotive force from the Hall element 7 is applied to the inverting input terminal of the operational amplifier 8 via the resistor 10, and the Hall electromotive force from the Hall element 7 is applied via the series circuit of the resistor 11 and the resistor 12 to the operational amplifier 8 Applied to the non-inverting input terminal of. The resistor 14 is a feedback resistor.
一方、抵抗11と抵抗12との接続点はトランジスタ13を介
してアースし、トランジスタ13のゲートには正逆切換信
号が供給してあつて、演算増幅器８をトランジスタ13が
オン状態のときは反転増幅器として作動させ、オフ状態
のときは非反転増幅器として作動させるようにしてあ
る。On the other hand, the connection point between the resistor 11 and the resistor 12 is grounded via the transistor 13, and the forward / reverse switching signal is supplied to the gate of the transistor 13, and the operational amplifier 8 is inverted when the transistor 13 is in the ON state. It operates as an amplifier, and when it is off, it operates as a non-inverting amplifier.
また演算増幅器８の出力電圧は固定子コイル９に印加し
て固定コイル９を駆動する。The output voltage of the operational amplifier 8 is applied to the stator coil 9 to drive the fixed coil 9.
上記の如く構成された本考案の一実施例において、正逆
切換信号の極性が正のときはトランジスタ13はオン状態
に、極性が正でないときはオフ状態に切換えられるもの
とする。また、抵抗10、14の抵抗値R1、R2はR1＝R2に設
定してあるものとする。In one embodiment of the present invention constructed as described above, it is assumed that the transistor 13 is switched on when the polarity of the forward / reverse switching signal is positive and switched off when the polarity is not positive. Further, the resistance values R 1 and R 2 of the resistors 10 and 14 are set to R 1 = R 2 .
いまトランジスタ13がオフ状態のときは、演算増幅器８
の反転側の利得は〔−R2／R1＝−１〕であり、非反転側
の利得は〔１＋R2／R1＝２〕となつて、演算増幅器８の
利得は〔２−１＝１〕となつて、演算増幅器８は利得１
の非反転増幅器として働く。When the transistor 13 is off now, the operational amplifier 8
The gain of the inverting side is [-R 2 / R 1 = -1], Do gain of the non-inverting side of the [1 + R 2 / R 1 = 2 ] connexion, the gain of the operational amplifier 8 [2-1 = 1], the operational amplifier 8 has a gain of 1
Works as a non-inverting amplifier.
一方、トランジスタ13がオン状態のときは非反転入力端
子の入力は無くなつて、演算増幅器８は反転増幅器とし
て働き、その利得は〔−R2／R1＝−１〕となる。On the other hand, the transistor 13 is input is a no connexion of the non-inverting input terminal when in an on state, the operational amplifier 8 acts as an inverting amplifier, its gain becomes [-R 2 / R 1 = -1].
したがつて正逆切換信号によりトランジスタ13のオン・
オフを制御することにより、演算増幅器８は利得が一定
のまゝその出力の極性が切換えられた状態になり、従来
必要としたホール素子への通電電流の極性を切換える正
逆転切換回路６は不要となる。Therefore, the transistor 13 is turned on / off by the forward / reverse switching signal.
By controlling the OFF, the operational amplifier 8 is in a state in which the output polarity is switched while the gain is constant, and the forward / reverse switching circuit 6 for switching the polarity of the current flowing to the Hall element, which is conventionally required, is unnecessary. Becomes
（考案の効果） 以上説明した如く本考案によれば、固定子コイルを駆動
する演算増幅器の極性を、利得を一定のまゝの状態で切
換えるようにしたため、従来必要としたホール素子への
通電電流の極性を切換える正逆転切換回路なしで、ホー
ルモータの回転方向を切換えることができる。また、そ
のための回路構成もきわめて簡単ですむ。(Effects of the Invention) As described above, according to the present invention, the polarity of the operational amplifier that drives the stator coil is switched with the gain kept constant, so that the Hall element that has been conventionally required to be energized. The rotation direction of the hall motor can be switched without a forward / reverse switching circuit that switches the polarity of the current. Also, the circuit configuration for that is extremely simple.
第１図は本考案の一実施例の構成を示す回路図。 第２図は従来例の回路図。 ８……演算増幅器、９……固定子コイル、10〜12および
14……抵抗、13……トランジスタ。FIG. 1 is a circuit diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a circuit diagram of a conventional example. 8 ... Operational amplifier, 9 ... Stator coil, 10-12 and
14 …… resistor, 13 …… transistor.
Claims (1)
動する演算増幅器を備えたホールモータ駆動回路におい
て、前記演算増幅器の帰還抵抗と同一抵抗値を有する第
１の抵抗を介して前記演算増幅器の反転入力端子に、か
つ第２および第３の抵抗の直列回路を介して前記演算増
幅器の非反転入力端子にそれぞれ前記ホール起電力を印
加し、前記第２の抵抗と前記第３の抵抗との接続点をホ
ールモータの回転方向に対応させた正逆切換信号により
オン・オフされるスイツチ手段を介して選択的にアース
するようにしてなることを特徴とするホールモータ駆動
回路。1. A Hall motor drive circuit comprising an operational amplifier for amplifying a Hall electromotive force to drive a stator coil, wherein the operation is performed via a first resistor having the same resistance value as a feedback resistance of the operational amplifier. The Hall electromotive force is applied to the inverting input terminal of the amplifier and to the non-inverting input terminal of the operational amplifier via the series circuit of the second and third resistors, respectively, and the second resistance and the third resistance are applied. 2. A hall motor drive circuit, characterized in that a connection point to and is selectively grounded through a switch means that is turned on / off by a forward / reverse switching signal corresponding to the rotation direction of the hall motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985107000U JPH0717280Y2 (en) | 1985-07-15 | 1985-07-15 | Hall motor drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985107000U JPH0717280Y2 (en) | 1985-07-15 | 1985-07-15 | Hall motor drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6219094U JPS6219094U (en) | 1987-02-04 |
| JPH0717280Y2 true JPH0717280Y2 (en) | 1995-04-19 |
Family
ID=30982876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985107000U Expired - Lifetime JPH0717280Y2 (en) | 1985-07-15 | 1985-07-15 | Hall motor drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0717280Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5218995B2 (en) * | 1973-08-27 | 1977-05-25 | ||
| JPS5524895Y2 (en) * | 1974-08-22 | 1980-06-14 |
-
1985
- 1985-07-15 JP JP1985107000U patent/JPH0717280Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6219094U (en) | 1987-02-04 |
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