JPS5961496A - Rotating speed control circuit for dental dc motor - Google Patents
Rotating speed control circuit for dental dc motorInfo
- Publication number
- JPS5961496A JPS5961496A JP17231682A JP17231682A JPS5961496A JP S5961496 A JPS5961496 A JP S5961496A JP 17231682 A JP17231682 A JP 17231682A JP 17231682 A JP17231682 A JP 17231682A JP S5961496 A JPS5961496 A JP S5961496A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- motor
- capacitor
- condenser
- switch
- 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
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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
Abstract
Description
【発明の詳細な説明】
本発明は、歯科用直流電動機の回転速度制御回路に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotation speed control circuit for a dental DC motor.
一般に、Ｉ＃科用直流電動機によシハンドカッターを回
転させる場合、その回転速度は可変抵抗の可変操作によ
り所望の一定速反となるよりに制御しているものである
。ところが、この方式の場合、可変抵抗の操作の頻度が
多くて面倒であるとともに、この可変抵抗が損傷し易い
。Generally, when a hand cutter is rotated by an I# class DC motor, its rotational speed is controlled to a desired constant speed by variable operation of a variable resistor. However, in this method, the variable resistor has to be operated frequently and is troublesome, and the variable resistor is easily damaged.
本発明は、このような点に鑑みなされたもので、可変抵
抗方式を採ることなく簡単な操作で所望の一定速度を確
保することができる歯科用直流電動機の回転速度制御回
路を得ることを目的とするものである。The present invention was made in view of the above points, and an object of the present invention is to obtain a rotation speed control circuit for a dental DC motor that can secure a desired constant speed with simple operation without adopting a variable resistance method. That is.
本発明は、電源電圧を分圧抵抗により分圧した電圧によ
シ充電されるコンデンサと、その充電電圧に応じて′Ｉ
ＩＬｔＪｈ機の回転速度を制御する駆動回路と、分圧抵
抗・コンデンサ間に接続され、てコンデンサの充電電圧
を規制するスイッチとを設けることにより、回転速度が
コンデンサの充電電圧によシ規制されることにな９、所
望の回転速度になったときにスイッチをＯＦＦさせれば
、そのときの充電電圧によシ回転速度を一定に維持する
ことができるように構成したものである。The present invention provides a capacitor that is charged by a voltage obtained by dividing a power supply voltage by a voltage dividing resistor, and a capacitor that is
By providing a drive circuit that controls the rotation speed of the ILtJh machine and a switch that is connected between the voltage dividing resistor and the capacitor and regulates the charging voltage of the capacitor, the rotation speed is regulated by the charging voltage of the capacitor. In particular, if the switch is turned off when the desired rotational speed is reached, the rotational speed can be maintained constant depending on the charging voltage at that time.
本発明の一実施例を図面に基づいて説明する。An embodiment of the present invention will be described based on the drawings.
まず、５０Ｈ２または６０Ｈ２のＡＣｌｏｏＶの文流電
源にはヒユーズＦ、７−）スイッチＳＷ、、ＳＷ、を介
してトランスＴの一次コイルＮ＋ ト！ＪレーコイルＬ
Ｃト；６（並列に接続されている。トランスＴの二次コ
イ／Ｉ／Ｎ２には整流回路ＲＦＣ１平滑用コンデンサｃ
１、分圧抵抗となる半固定抵抗ＶＲが順次接続されてい
る。この半固定抵抗ＶＲに対する可動接片は抵抗Ｒ１を
介してコンデンサＣ２に接続きれている。このコンデン
サＣ２にはその放電回路をなす抵抗Ｒ２が並列に接続さ
れている。そして、コンデンサｃ２の一端には抵抗Ｒ３
を介して駆動回路を構成するダーリントン接続のトラン
ジスタＴｒｌ、 Ｔｒｚ、Ｔｒｓが接続されでいる。First, the 50H2 or 60H2 AClooV power supply is connected to the primary coil N+ of the transformer T via the fuse F, 7-) switches SW, SW, and SW. J Ray Coil L
6 (connected in parallel. The secondary coil/I/N2 of the transformer T has a rectifier circuit RFC1 smoothing capacitor c
1. Semi-fixed resistors VR serving as voltage dividing resistors are connected in sequence. The movable contact piece for this semi-fixed resistor VR is connected to the capacitor C2 via the resistor R1. A resistor R2 forming a discharge circuit is connected in parallel to this capacitor C2. A resistor R3 is connected to one end of the capacitor c2.
The Darlington-connected transistors Trl, Trz, and Trs constituting the drive circuit are connected through the gate.
ここで、コンデンサｃ２、抵抗Ｒ３に対して並列にコン
デンサＣ３、Ｃ４が接続されている。また、トランジス
タＴｒ！のエミッタとコンデンサｃ２の他端との間には
コンデンサｃ５、ダイオードＤが接続されているととも
に、歯科用直流電動機Ｍが接続されている。そして、駆
動回路の前段にはトランジスタＴｒｓのペース側に対し
抵抗Ｒ４を介して接続されつつ抵抗Ｒ５、Ｒ６を有する
トランジスタＴｒ４が設けられている。また、前記リレ
ーコイルＬＣにょシ切換えられるリレースイッチＬＳＷ
１、ＬＳＷ２．ＬＢＷｓ ｆ）” Ｆａけられている。Here, capacitors C3 and C4 are connected in parallel to capacitor c2 and resistor R3. Also, the transistor Tr! A capacitor c5 and a diode D are connected between the emitter of and the other end of the capacitor c2, and a dental DC motor M is also connected. A transistor Tr4 is provided at the front stage of the drive circuit, and is connected to the pace side of the transistor Trs via a resistor R4 and has resistors R5 and R6. In addition, a relay switch LSW that can be switched to the relay coil LC.
1.LSW2. LBWs f)” Fa has been kicked.
リレースイッチＬｓｗ、はスイッチＳＷ２ に並列に接
続され、リレースイッチＬｓｗ、は抵抗Ｒ２のコンデン
サＣ２に対する接続を断続するものであ多、リレースイ
ッチＬＳＷ３は電動機Ｍの電源ラインへの接続を断続す
るものであり、このリレースイッチＬＳＷＳを介して抵
抗Ｒ７が電動機Ｍに並列に接続されている（図示のリレ
ースイッチＬＳＷ１ 、 ＬＳＷ２ 、 ＬＳＷ３はリ
レーコイルＬｅに通電されていない状態を示す鬼しかし
て、前記半固定抵抗ＶＢと抵抗Ｒ，との間にはスタート
用のフートスイッチｓＷ２に連動するフートスイッチＳ
Ｗ３が設けられている。The relay switch LSW is connected in parallel to the switch SW2, the relay switch LSW is used to connect the resistor R2 to the capacitor C2, and the relay switch LSW3 is used to connect the motor M to the power supply line. A resistor R7 is connected in parallel to the electric motor M via this relay switch LSWS. Between the resistor VB and the resistor R, there is a foot switch S that is linked to the starting foot switch sW2.
W3 is provided.
このような構成において、フートスイッチｓｗ１、ＳＷ
２を閉じると、−次コイルＮＳ、リレーコイルＬｃに対
し通電状態となり、リレースイッチＬＳＷＩ、ＬＳＷ、
、ＬＳＷ３は図示の状態から逆の状態へ切換えられると
ともに、整流回路ＲＦＣ以下も通電状態となる。これに
よシニ次コイルＮ２に得られた電圧は整流回路ＲＥＣに
よシ整流されコンデンサＣＩで平滑されて半固定抵抗Ｖ
Ｒによシ分圧される。この分圧電圧は抵抗Ｒ１を介して
コンデンサｃ２を充電することになる。このコンデンサ
Ｃ２が一端に接続されているトランジスタＴｒｌ、 Ｔ
ｒ２、Ｔｒｓによる駆動回路はこのコンデンサＣ２の充
電電圧に応じて増幅動作を行ない、電動機Ｍをその電圧
に応じた回転速度で回転させ始める。このようにして電
動機Ｍの回転速度が上昇するものであるが、所望の回転
速度になったときフートスイッチＳＷ２から足を離して
ＯＦＦさせればよい（このとき、フートスイッチＳＷ２
はＯＦＦしてもリレースイッチＬＳＷ１により自己保持
式れ、回路への通電状態は維持される）。すなわち、フ
ートスイッチＳＷ３もこれに連動してＯＦＦするので、
コンデンサＣ２への充電動作が停止することになシ、こ
のときのコンデンサＣ２の充電電圧にて電動機Ｍの回転
速度を規制でき、この電動機Ｍは所望の一定回転速度に
維持される。このように、所望の回転速度になったとき
フートスイッチＳＷ、をＯＦＦさせればよく、従来のよ
うに可変抵抗の可変操作を頻繁に行なう必侠はなく操作
性がよい。In such a configuration, the foot switches sw1, SW
2, the secondary coil NS and relay coil Lc are energized, and the relay switches LSWI, LSW,
, LSW3 is switched from the illustrated state to the opposite state, and the rectifier circuit RFC and below are also energized. As a result, the voltage obtained at the secondary coil N2 is rectified by the rectifier circuit REC, smoothed by the capacitor CI, and is then smoothed by the semi-fixed resistor V.
The pressure is divided by R. This divided voltage charges the capacitor c2 via the resistor R1. A transistor Trl, T to which this capacitor C2 is connected
The drive circuit composed of r2 and Trs performs an amplification operation according to the charging voltage of the capacitor C2, and starts rotating the motor M at a rotational speed according to the voltage. In this way, the rotational speed of the electric motor M increases, and when the desired rotational speed is reached, the foot switch SW2 can be turned off by taking the foot off the foot switch SW2.
Even if the circuit is turned off, it is self-retained by the relay switch LSW1, and the energized state of the circuit is maintained.) In other words, foot switch SW3 is also turned off in conjunction with this, so
Even if the charging operation to the capacitor C2 does not stop, the rotational speed of the motor M can be regulated by the charging voltage of the capacitor C2 at this time, and the motor M is maintained at a desired constant rotational speed. In this way, it is sufficient to turn off the foot switch SW when the desired rotational speed is reached, and there is no need to frequently change the variable resistance as in the prior art, resulting in good operability.
ところで、電動機Ｍは歯の硬さ等の負荷に応じてその回
転速度が変動するものであるが、このとき電源ラインに
抵抗Ｒ６が挿入されその両端電圧ＶＲｓにて変動が検出
され、トランジスタＴｒ４を制御するので、たとえば負
荷が増して電圧ｖＲ，が大きくなったときにはトランジ
スタＴｒ４を介してトランジスタＴｒｓ側へのベースバ
イアスを増加させて電動機Ｍの回転速度を修正すること
ができる。一方、電動機Ｍへの通電時にはこの抵抗Ｒ６
との関係で電圧ｖＲ，が大となシミ流増加傾向にな多回
路が不安定となるが、このような状態はコンデンサＣｓ
、 Ｃ４の存在によシ平滑化されて安定することにな
る。By the way, the rotational speed of the electric motor M fluctuates depending on the load such as the hardness of the teeth. At this time, a resistor R6 is inserted into the power supply line, and a fluctuation is detected in the voltage VRs across the resistor R6, and the transistor Tr4 is For example, when the load increases and the voltage vR increases, the base bias toward the transistor Trs can be increased through the transistor Tr4 to correct the rotational speed of the motor M. On the other hand, when the electric motor M is energized, this resistance R6
Due to the relationship with the voltage vR, the stain current tends to increase and the multi-circuit becomes unstable.
, is smoothed and stabilized by the presence of C4.
そして、フートスイッチＳＷ、をＯＦＦさせると回路へ
の通電状態が断たれ、電動機Ｍは停止する。コンデンサ
Ｃ２の電荷は抵抗Ｒ２によシ放電される。ついで、再始
動は同様にして行なわれるが、この際、必ず電動機Ｍの
回転数が順次上昇する状態となる。Then, when the foot switch SW is turned off, the current to the circuit is cut off, and the motor M is stopped. The charge on capacitor C2 is discharged by resistor R2. Next, restart is performed in the same manner, but at this time, the rotational speed of the electric motor M is always increased sequentially.
本発明は、上述したように電源電圧を分圧抵抗によシ分
圧した電圧によシ充電されるコンデンサと、その充電電
圧に応じて電動機の回転速度を制御する駆動回路と１分
圧抵抗・コンデンサ間に接続されてコンデンサの充電電
圧を規制するスイツチとを設けたので、歯科用直流電動
機の回転速度をこのコンデンサの充電電圧によって規制
維持することができ、よって、所望の回転速度になった
ときにスイッチをＯＦＦさせるだけで操作性よくして、
回転速度を一定に維持することができるものである。As described above, the present invention includes a capacitor that is charged by a voltage obtained by dividing a power supply voltage by a voltage dividing resistor, a drive circuit that controls the rotational speed of a motor according to the charging voltage, and a voltage dividing resistor. - Since a switch is provided that is connected between the capacitors and regulates the charging voltage of the capacitor, the rotational speed of the dental DC motor can be regulated and maintained by the charging voltage of this capacitor, so that the desired rotational speed can be achieved. Improved operability by simply turning off the switch when
It is possible to maintain a constant rotation speed.
図面は本発明の一実施例を示す回路図である。
ＶＲ・・・半固定抵抗（分圧抵抗）、Ｒ２・・・抵抗（
放電回路）、Ｃ２・・・コンデンサ、Ｍ・・・歯科用直
流電動機、Ｔｒｌ−Ｔｒｓ・・・トランジスタ（駆動回
路） 、ＳＷｔ・・・フートスイッチ（電源スィッチ）
、 ＳＷｓ・・・フートスイッチ（スイッチ）The drawing is a circuit diagram showing an embodiment of the present invention. VR...Semi-fixed resistance (divider voltage resistance), R2...Resistance (
discharge circuit), C2...capacitor, M...dental DC motor, Trl-Trs...transistor (drive circuit), SWt...foot switch (power switch)
, SWs...foot switch (switch)
Claims (1)
るコンデンサを設け、このコンデンサの充電電圧に応じ
て歯科用直流電動機の回転速度を制御する駆動回路を設
け、前記コンデンサの充電電圧を一定値に維持させるス
イッチを前記分圧抵抗・コンデンサ間に接続するととも
に、電源スィッチに連動してコンデンサの充電電圧を放
電させる放電回路を設けたことを特徴とする歯科用直流
・電動機の回転速度制御回路。A capacitor that is charged by a voltage obtained by dividing the power supply voltage by a voltage dividing resistor is provided, and a drive circuit that controls the rotational speed of the dental DC motor according to the charging voltage of this capacitor is provided, and the capacitor is charged. A dental direct current motor, characterized in that a switch for maintaining the voltage at a constant value is connected between the voltage dividing resistor and the capacitor, and a discharge circuit is provided for discharging the charging voltage of the capacitor in conjunction with a power switch. Rotation speed control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17231682A JPS5961496A (en) | 1982-09-29 | 1982-09-29 | Rotating speed control circuit for dental dc motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17231682A JPS5961496A (en) | 1982-09-29 | 1982-09-29 | Rotating speed control circuit for dental dc motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5961496A true JPS5961496A (en) | 1984-04-07 |
Family
ID=15939652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17231682A Pending JPS5961496A (en) | 1982-09-29 | 1982-09-29 | Rotating speed control circuit for dental dc motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5961496A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4424920Y1 (en) * | 1966-12-02 | 1969-10-20 | ||
| JPS531014B2 (en) * | 1972-08-29 | 1978-01-13 | ||
| JPS5532606B2 (en) * | 1973-08-15 | 1980-08-26 | ||
| JPS5696306A (en) * | 1979-12-28 | 1981-08-04 | Sanwa Denki Kk | Direct current regulated power supply device |
| JPS5640497B2 (en) * | 1974-11-22 | 1981-09-21 | ||
| JPS571099B2 (en) * | 1977-07-01 | 1982-01-09 |
-
1982
- 1982-09-29 JP JP17231682A patent/JPS5961496A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4424920Y1 (en) * | 1966-12-02 | 1969-10-20 | ||
| JPS531014B2 (en) * | 1972-08-29 | 1978-01-13 | ||
| JPS5532606B2 (en) * | 1973-08-15 | 1980-08-26 | ||
| JPS5640497B2 (en) * | 1974-11-22 | 1981-09-21 | ||
| JPS571099B2 (en) * | 1977-07-01 | 1982-01-09 | ||
| JPS5696306A (en) * | 1979-12-28 | 1981-08-04 | Sanwa Denki Kk | Direct current regulated power supply device |
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