JPS61199493A - Rotating speed controller of motor - Google Patents
Rotating speed controller of motorInfo
- Publication number
- JPS61199493A JPS61199493A JP60039190A JP3919085A JPS61199493A JP S61199493 A JPS61199493 A JP S61199493A JP 60039190 A JP60039190 A JP 60039190A JP 3919085 A JP3919085 A JP 3919085A JP S61199493 A JPS61199493 A JP S61199493A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- electric motor
- thyristor
- capacitor
- full
- 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
- H02P7/285—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 controlling armature supply only
- H02P7/288—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 controlling armature supply only using variable impedance
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ジューサーやフードブロセソザなどの家庭用
調理機器に利用されている電動機の回転数制御装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rotation speed control device for an electric motor used in household cooking appliances such as juicers and food processors.
従来の技術
従来から家庭用調理機器の速度調節機能として、電動機
の制御が行々われでいる。その従来例を第５図及び第６
図（ａ）（ｂ）にもとづいて説明する。2. Description of the Related Art Conventionally, electric motors have been controlled as a speed adjustment function for household cooking appliances. Conventional examples are shown in Figures 5 and 6.
This will be explained based on Figures (a) and (b).
第５図において、交流電源１から正の半波が印加される
と、電動機２、抵抗３、ダイオード４を介してコンデン
サ５が充電されていく。そしてコンデンサ６が所定の電
圧になると、コンデンサ５の一端とサイリスタ６のゲー
ト端子間に接続されているダイアック７を介してコンデ
ンサ５の電荷は放電される。In FIG. 5, when a positive half wave is applied from an AC power supply 1, a capacitor 5 is charged via a motor 2, a resistor 3, and a diode 4. When the capacitor 6 reaches a predetermined voltage, the charge in the capacitor 5 is discharged via the diac 7 connected between one end of the capacitor 5 and the gate terminal of the thyristor 6.
すなわち、第６図（ａ、） （ｂ）に示すようにサイリ
スタ６のアノード端子の電圧ｖＡに正の半波が印加され
ると、コンデンサ６の電圧ｖｃは徐々に増加し、ダイア
ック７のブレークオーバ電圧ＶＢに達した時刻Ｔ１でダ
イアック７がオンし、かつサイリスタ６もターンオンし
て電動機２に電流が流れて回転する。負の半波が印加さ
れると、サイリスタ６は逆バイアスされてターンオフし
、電動機２への通電電流は停止されるもので、この場合
、時刻Ｔ１の設定を変えることにより、電動機２０回転
数の制御を行なっていた。つ゛まり、交流１ザイクルの
うちＴ１〜Ｔ２の間のみ電動機２を利用し、残りのＴＯ
〜Ｔ１．Ｔ２〜Ｔ４の間は利用しないという方３ 、
法を用いていた。That is, when a positive half-wave is applied to the voltage vA at the anode terminal of the thyristor 6 as shown in FIGS. At time T1 when the overvoltage VB is reached, the diac 7 is turned on, and the thyristor 6 is also turned on, causing current to flow into the motor 2 and causing it to rotate. When a negative half-wave is applied, the thyristor 6 is reverse biased and turned off, and the current flowing to the motor 2 is stopped.In this case, by changing the setting of time T1, the motor 20 rotation speed is changed. was in control. In other words, motor 2 is used only between T1 and T2 in one cycle of AC, and the remaining TO
~T1. The third method was not to use it between T2 and T4.
発明が解決しようとする問題点
このような従来の回路構成においては、構成が極めて簡
単であるという利点を有するが、その反面、電動機２に
は不連続電流しか流れないため、トルク脈動や速度変動
率が大きくなり、その結果、電動機の回転数に比例した
逆起電力が十分利用できないという欠点があり、このた
め、逆起電力をフィードバックしても負荷変動に対し定
速度回転を保つことができず、そのため、材料切削時に
容易に電動機が拘束されて焼損に至るという問題点があ
った。Problems to be Solved by the Invention This conventional circuit configuration has the advantage of being extremely simple, but on the other hand, since only discontinuous current flows through the motor 2, torque pulsations and speed fluctuations occur. As a result, the back electromotive force proportional to the rotational speed of the motor cannot be fully utilized. Therefore, even if the back electromotive force is fed back, constant speed rotation cannot be maintained against load fluctuations. Therefore, there was a problem in that the electric motor was easily restrained during material cutting, leading to burnout.
本発明は上記の問題点を解決するもので、負荷変動があ
っても常に定速度回転を得ることができるようにするこ
とを目的とする。The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to make it possible to always obtain constant speed rotation even when there are load fluctuations.
問題点を解決するための手段
上記問題点を解決するために本発明は、電動機と、この
電動機の回転数制御を行なう制御装置とを有し、前記制
御装置は、交流電源の両端に接続され交流を直流に変換
する全波整流器と、この全波整流器の直流出力端子の両
端に前記電動機と制御整流素子を直列に接続し、かつ前
記制御整流素子の両端から電動機の逆起電力を検出・演
算するように構成したものである。Means for Solving the Problems In order to solve the above problems, the present invention includes an electric motor and a control device for controlling the rotation speed of the electric motor, and the control device is connected to both ends of an AC power source. A full-wave rectifier that converts alternating current to direct current; the motor and a control rectifier are connected in series to both ends of the DC output terminal of this full-wave rectifier, and the back electromotive force of the motor is detected from both ends of the control rectifier. It is configured to perform calculations.
作用
」−記構酸によれは、電動機に平滑化された連続電流が
流れる／こめ、トルク脈動や速度変動率は小さくなって
、電動機の逆起電力を十分に利用することができ、その
結果、負荷変動があっても常に定速度回転を得ることが
できるため、例えば、材料切削時に電動機が容易に拘束
されて焼損に至るという問題もなくなるものである。According to the structure, a smoothed continuous current flows through the electric motor, torque pulsation and speed fluctuation rate are reduced, and the back electromotive force of the electric motor can be fully utilized. Since constant speed rotation can always be obtained even when there are load fluctuations, for example, the problem that the electric motor is easily restrained and burnt out during material cutting is eliminated.
実施例
以下、本発明の実施例を誰何図面にもとづいて説明する
。第１図は本発明の一実施例における電動機の回転数制
御装置の回路図を示したもので、この第１図において、
従来例で示した第５図と同一部品について口、同一番号
を付してその説明は省略１−１異なる点のみを説明する
。すなわち、第１図において、８は交流電源１０両端に
接続され交５ 、
流を直流に変換する全波整流器で、この全波整流器８の
直流出力端子の両端に電動機２とサイリスタ６を直列に
接続して、電動機２０回転数制御を行なう制御装置を構
成している。９，１０，１１゜１２．１３は抵抗、１４
は比較器、１５はトランジスタ、１６は定電圧電源であ
る。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a circuit diagram of an electric motor rotation speed control device according to an embodiment of the present invention.
The same parts as those in FIG. 5 shown in the conventional example are given the same numbers, and the explanation thereof is omitted. Only the differences 1-1 will be explained. That is, in FIG. 1, 8 is a full-wave rectifier that is connected to both ends of the AC power supply 10 and converts AC 5 to DC.A motor 2 and a thyristor 6 are connected in series to both ends of the DC output terminals of this full-wave rectifier 8. When connected, a control device for controlling the rotation speed of the electric motor 20 is configured. 9,10,11゜12.13 is resistance, 14
1 is a comparator, 15 is a transistor, and 16 is a constant voltage power supply.
上記回路構成において、動作を説明する。ＶＢは比較器
１４の出力がｒＨ」レベルの場合は、抵抗９及び１０に
よる分圧値（以下ＶＥ（Ｈ）という）となり、比較器１
４の出力がｒＬＪレベルの場合は、抵抗９，１０及び１
１による分圧値（以下ＶＢ（Ｌ）という）となる。ｖＢ
Ｈと”ＢＬの関係はＶＢ（ハ）〉ＶＢ（Ｌ）となってい
る。The operation of the above circuit configuration will be explained. When the output of the comparator 14 is at the rH level, VB becomes the divided voltage value (hereinafter referred to as VE (H)) by the resistors 9 and 10, and the output of the comparator 1
When the output of 4 is at rLJ level, resistors 9, 10 and 1
1 (hereinafter referred to as VB(L)). vB
The relationship between H and BL is VB(C)>VB(L).
サイリスタ６がオフの場合、コンデンサ５は第５図と同
様に電動機２、抵抗３及びダイオード４を介して充電さ
れる。■ｃくＶＢ（ＶＢ（Ｈ））の場合は比較器１４の
出力が「Ｈ」であるため、この状態が継続される。そし
てｖｃ≧Ｖ Ｂ ＣＦ（）になると、比較器１４の出力
は「Ｌ」になる。これにより、トランジスタ１５がオン
するため、コンデンサ５の電荷はトランジスタ１６及び
抵抗１３を介してサイリスタ６のゲート端子へと放電さ
れ、サイリスタ６はターンオンする。これと同時に抵抗
１１が抵抗１０と並列接続され、ＶＢ＝ＶＢ（Ｌ）にな
るので、コンデンサ５の放電はＶＣ＝ＶＢ（Ｌ）になる
丑で継続される。When the thyristor 6 is off, the capacitor 5 is charged via the motor 2, resistor 3 and diode 4 in the same way as in FIG. (2) In the case of low VB (VB(H)), the output of the comparator 14 is "H", so this state continues. When vc≧V B CF(), the output of the comparator 14 becomes “L”. As a result, the transistor 15 is turned on, so that the charge in the capacitor 5 is discharged to the gate terminal of the thyristor 6 via the transistor 16 and the resistor 13, and the thyristor 6 is turned on. At the same time, the resistor 11 is connected in parallel with the resistor 10, and VB=VB(L), so the discharge of the capacitor 5 continues until VC=VB(L).
この動作は、全波整流器２０があるために交流の半サイ
クル毎に繰り返され、第２図（ａ）（ｂ）に示すＴ１〜
Ｔ２．Ｔ３〜Ｔ４の間は電動機２に電流を流し、Ｔｏ−
Ｔ１．Ｔ２〜Ｔ３の間は電動機２には電流が流れず、停
止するようになり、その結果、電動機２には平滑化され
た連続電流が流れることになる。This operation is repeated every half cycle of AC due to the presence of the full-wave rectifier 20, and T1 to T1 shown in FIGS. 2(a) and (b)
T2. Current is passed through the motor 2 between T3 and T4, and To-
T1. Between T2 and T3, no current flows through the motor 2 and it comes to a halt, and as a result, a smoothed continuous current flows through the motor 2.
第３図は本発明の他の実施例を示したもので、この実施
例における動作は第１図と全く同様で、この第３図は第
１図の比較器１４をトランジスタ１７．１８で置換した
ものである。この実施例においても、電動機２には平滑
化された連続電流が流れるものである。FIG. 3 shows another embodiment of the invention, the operation of which is exactly the same as that of FIG. 1, in which comparator 14 of FIG. This is what I did. Also in this embodiment, a smoothed continuous current flows through the electric motor 2.
本発明の実施例の回転数制御装置は、全波整流器８で全
波整流１７た後の電動機２の逆起電力をフイードバック
してコンデンサ５を充電することにより時刻Ｔつ及びＴ
３を決定しているので、負荷変動により電動機２の回転
数が変化すれば逆起電力も変化することになり、その結
果、一定の回転数を保つ」：うに作用する。このＮ−Ｔ
特性を第４図に示す。この第４図から明らかなように、
トルクが変動しても定速度回転を保つことができるもの
である。The rotation speed control device according to the embodiment of the present invention feeds back the back electromotive force of the motor 2 after full-wave rectification 17 in the full-wave rectifier 8 to charge the capacitor 5 at time T and T.
3, so if the rotational speed of the motor 2 changes due to load fluctuations, the back electromotive force will also change, and as a result, the rotational speed will be maintained at a constant value. This N-T
The characteristics are shown in Figure 4. As is clear from this figure 4,
It can maintain constant speed rotation even if the torque fluctuates.
発明の効果
以上のように本発明によれば、電動機に平滑化された連
続電流を流すことができるため、トルク脈動や速度変動
率は小さくなり、その結果、電動機の逆起電力が十分に
利用できるため、極めて安価に１７で、負荷変動に無関
係な定速度回転を得ることができる。すなわち、この種
の電動機を利用して材料を切削する場合においても、電
動機の拘束は起こりにくいという優れた効果が得られる
。Effects of the Invention As described above, according to the present invention, since smoothed continuous current can be passed through the motor, torque pulsation and speed fluctuation rate are reduced, and as a result, the back electromotive force of the motor can be fully utilized. Therefore, it is possible to obtain constant speed rotation independent of load fluctuations at an extremely low cost. That is, even when cutting a material using this type of motor, an excellent effect can be obtained in that the motor is unlikely to be restricted.
なお、材料切削に要するｌ・ルクが小さくてすむ場合に
は、従来、電動機により駆動されるカッターやビータ−
などを接続していたギヤやベルト等により構成される減
速機構を廃止でき、製品のコンパクト化や騒音の低減が
容易に実現できるという優れた効果も得られるものであ
る。In addition, when the l-lux required for cutting the material is small, cutters and beaters driven by electric motors have conventionally been used.
It is possible to eliminate the reduction mechanism consisting of gears, belts, etc. that were used to connect the motors, etc., and it also has the excellent effect of easily realizing compactness of the product and reduction of noise.
第１図は本発明の一実施例を示す電動機の回転数制御装
置の回路図、第２図（ａ）（ｂ）は同制御装置の各部の
電圧波形図、第３図は本発明の他の実施例を示す回転数
制御装置の回路図、第４図は同制御装置における電動機
のＮ−Ｔ特性図、第５図→婉は従来例を示す回転数制御
装置の回路図、第２は同制御装置の各部の電圧波形図で
ある。
１・・・交流電源、２・・・・電動機、６・・・・・・
サイリスタ（制御整流素子）、８・・ ・全波整流器、
１４・比較器、１５・・ トランジスタ、１６・・・・
定電圧電源。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名］：
Ｊ
−区
区
派 ２
１ト 、
よ ＼Fig. 1 is a circuit diagram of an electric motor rotation speed control device showing one embodiment of the present invention, Fig. 2 (a) and (b) are voltage waveform diagrams of various parts of the same control device, and Fig. 3 is a circuit diagram of an electric motor rotation speed control device showing an embodiment of the present invention. 4 is a circuit diagram of a rotation speed control device showing an embodiment of the invention, FIG. 4 is an N-T characteristic diagram of the electric motor in the same control device, FIG. It is a voltage waveform diagram of each part of the same control device. 1... AC power supply, 2... electric motor, 6...
Thyristor (controlled rectifier), 8... Full wave rectifier,
14.Comparator, 15.. Transistor, 16..
Constant voltage power supply. Name of agent: Patent attorney Toshio Nakao and 1 other person]:
J-ku ku faction 2 1to, yo ＼
Claims (1)
を有し、前記制御装置は、交流電源の両端に接続され交
流を直流に変換する全波整流器と、この全波整流器の直
流出力端子の両端に前記電動機と制御整流素子を直列に
接続し、かつ前記制御整流素子の両端から電動機の逆起
電力を検出・演算するように構成した電動機の回転数制
御装置。It has an electric motor and a control device that controls the rotation speed of the electric motor, and the control device includes a full-wave rectifier that is connected to both ends of an AC power source and converts the AC into DC, and a DC output terminal of the full-wave rectifier. A rotation speed control device for an electric motor, wherein the electric motor and a control rectifier are connected in series at both ends thereof, and a back electromotive force of the electric motor is detected and calculated from both ends of the control rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60039190A JPS61199493A (en) | 1985-02-28 | 1985-02-28 | Rotating speed controller of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60039190A JPS61199493A (en) | 1985-02-28 | 1985-02-28 | Rotating speed controller of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61199493A true JPS61199493A (en) | 1986-09-03 |
Family
ID=12546193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60039190A Pending JPS61199493A (en) | 1985-02-28 | 1985-02-28 | Rotating speed controller of motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61199493A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52114912A (en) * | 1976-03-23 | 1977-09-27 | Maruzen Sewing Machine | Motor driven sewing machine speed controlling circuit |
-
1985
- 1985-02-28 JP JP60039190A patent/JPS61199493A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52114912A (en) * | 1976-03-23 | 1977-09-27 | Maruzen Sewing Machine | Motor driven sewing machine speed controlling circuit |
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