JPS631596Y2 - - Google Patents
Info
- Publication number
- JPS631596Y2 JPS631596Y2 JP1979175184U JP17518479U JPS631596Y2 JP S631596 Y2 JPS631596 Y2 JP S631596Y2 JP 1979175184 U JP1979175184 U JP 1979175184U JP 17518479 U JP17518479 U JP 17518479U JP S631596 Y2 JPS631596 Y2 JP S631596Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- frequency
- output
- electric 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
Links
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Description
【考案の詳細な説明】
本考案は電動機の定速制御装置に関し、電動機
の定速制御性能を向上せんとするものである。[Detailed Description of the Invention] The present invention relates to a constant speed control device for an electric motor, and is intended to improve the constant speed control performance of the electric motor.
この種従来装置として第１図に示すものがあ
る。即ち電動機１の回転軸に直結した周波数発電
機２により、電動機１の回転速度を該速度に比例
した周波数信号として検出し、該周波数信号を波
形整形回路３にて整形し、該整形出力を周波数電
圧変換回路４にて直流電圧に変換する。この変換
直流電圧信号e1を基準電圧発生回路５からの基準
信号ｅと比して誤差信号e3を形成し、該誤差信号
を増幅回路６にて増幅して電動機駆動回路７に帰
還し、電動機１を定速制御するものである。 A conventional device of this type is shown in FIG. That is, a frequency generator 2 directly connected to the rotating shaft of the motor 1 detects the rotation speed of the motor 1 as a frequency signal proportional to the speed, the frequency signal is shaped by a waveform shaping circuit 3, and the shaped output is converted into a frequency signal. The voltage conversion circuit 4 converts it into a DC voltage. This converted DC voltage signal e 1 is compared with the reference signal e from the reference voltage generation circuit 5 to form an error signal e 3 , and the error signal is amplified by the amplifier circuit 6 and fed back to the motor drive circuit 7 . This is to control the electric motor 1 at a constant speed.
ところがこの従来装置においては、周波数電圧
変換回路系の出力に大きなリツプルを生じ、これ
が電動機の回転速度ムラとなつて表われ、定速制
御性能が要求される場合には不都合となる。 However, in this conventional device, a large ripple occurs in the output of the frequency-voltage conversion circuit system, and this appears as uneven rotational speed of the motor, which is inconvenient when constant speed control performance is required.
本考案はかかる点に鑑み考案されたものにし
て、以下本考案の一実施例を図面に基いて説明す
る。第２図において、電動機１は、駆動回路７を
介して電源端子８，８′間に接続される。電動機
１の回転軸に直結した周波数発電機２の出力であ
る周波数信号は電動機１の回転速度に比例した信
号であり、該信号は波形整形回路３にて波形整形
される。該回路３は２個のインバータ回路９，１
０を主要素として構成され、波形整形出力e4は第
３図ａに示すように周波数に依存したものであ
り、周波数電圧変換回路４の単安定マルチバイブ
レータ回路１１に入力される。該回路１１は第１
第2NAND回路１２，１３、両NAND回路間に
接続されたコンデンサ１４及び抵抗１５の直列回
路、コンデンサ１４を介して第1NAND回路１２
の出力端１６と電源端子８′との間に接続された
抵抗１７及び、第2NAND回路１３の出力端１８
と第1NAND回路１２の一方の入力端との間の帰
還路１９で構成され、第2NAND回路１３の他方
の入力端は電源端子８に接続される。単安定マル
チバイブレータ回路１１の出力端１８は抵抗２０
を介してＣ−Ｒ素子からなる２段の積分回路２
１，２２に接続される。該積分回路２１の入力端
２３と第1NAND回路１２の出力端１６との間
に、周波数信号即ち波形整形出力e4に比し位相の
ずれた周波数の信号形成回路２４が接続される。
該回路２４は抵抗２５とコンデンサ２６の直列回
路からなる。積分回路２２の出力端２７は周波数
電圧変換回路４の出力端となり、該出力端に表わ
れる回転速度に対応した直流電圧信号e1は、第１
図で説明したように基準信号e2と差動増幅回路２
８で比較され、その比較誤差信号e3が増幅回路６
を介して電動機駆動回路７に帰還されて電動機１
を定速回転駆動する。 The present invention has been devised in view of these points, and one embodiment of the present invention will be described below based on the drawings. In FIG. 2, electric motor 1 is connected via drive circuit 7 between power supply terminals 8 and 8'. A frequency signal, which is the output of a frequency generator 2 directly connected to the rotating shaft of the electric motor 1, is a signal proportional to the rotational speed of the electric motor 1, and the signal is waveform-shaped by a waveform shaping circuit 3. The circuit 3 includes two inverter circuits 9, 1
The waveform-shaped output e4 is frequency-dependent as shown in FIG. The circuit 11 is the first
The second NAND circuits 12 and 13, a series circuit of a capacitor 14 and a resistor 15 connected between both NAND circuits, and the first NAND circuit 12 through the capacitor 14.
and the output terminal 18 of the second NAND circuit 13.
and one input terminal of the first NAND circuit 12, and the other input terminal of the second NAND circuit 13 is connected to the power supply terminal 8. The output terminal 18 of the monostable multivibrator circuit 11 is connected to a resistor 20.
A two-stage integrator circuit 2 consisting of a C-R element is connected to
1 and 22. Between the input terminal 23 of the integrating circuit 21 and the output terminal 16 of the first NAND circuit 12, a signal forming circuit 24 whose frequency is out of phase with respect to the frequency signal, that is, the waveform shaping output e 4 is connected.
The circuit 24 consists of a resistor 25 and a capacitor 26 connected in series. The output terminal 27 of the integrating circuit 22 becomes the output terminal of the frequency-voltage conversion circuit 4, and the DC voltage signal e 1 corresponding to the rotational speed appearing at the output terminal is the first
As explained in the figure, the reference signal e 2 and the differential amplifier circuit 2
8, and the comparison error signal e3 is sent to the amplifier circuit 6.
is fed back to the motor drive circuit 7 via the motor 1
is driven to rotate at a constant speed.
而して単安定マルチバイブレータ回路１１の入
力信号e4は回転速度に比例したデイジタル信号で
あり、該信号に対する回路１１の出力信号e5は第
３図ｂに示す如くなる。即ち出力信号e5はコンデ
ンサ１４の容量と抵抗１７の抵抗値で定まる時定
数期間Ｔがオフ期間となるものであり、回転速度
が大きいときには出力信号e5のオン期間が短かく
積分回路２１，２２の出力端２７に表われる出力
e1′が小さくなり、電動機１の回転数を低く抑え
るように作用し、回転速度が小さいときには、逆
に電動機の回転数を高くするように作用する。こ
の場合の出力e1′は第３図ｄの実線で示すように、
瞬時値の最大値E1と最小値E2の差が大きく、リ
ツプルが大きい。 The input signal e4 of the monostable multivibrator circuit 11 is a digital signal proportional to the rotational speed, and the output signal e5 of the circuit 11 corresponding to this signal is as shown in FIG. 3b. That is, the output signal e 5 has a time constant period T determined by the capacitance of the capacitor 14 and the resistance value of the resistor 17 as an off period, and when the rotation speed is high, the on period of the output signal e 5 is short and the integration circuit 21, The output appearing at the output end 27 of 22
When e 1 ' becomes small, it acts to keep the rotational speed of the electric motor 1 low, and when the rotational speed is small, it acts to increase the rotational speed of the electric motor. In this case, the output e 1 ' is as shown by the solid line in Figure 3d.
The difference between the maximum instantaneous value E 1 and the minimum value E 2 is large, and the ripple is large.
これに対し位相のずれた周波数の信号形成回路
２４を設けると、該回路２４により第３図ｃに示
すように、入力信号e4に対し位相のずれた周波数
信号e6が形成され、該周波数信号が出力信号e5に
重畳されるので、積分回路２１，２２の出力端２
７に表われる出力e1″は第３図ｄの破線で示すも
のとなり、その瞬時値の最大値E1と最小値E3の
差が小さく出力e1′に対しリツプルが小さくなる。 On the other hand, if a signal forming circuit 24 with a frequency out of phase is provided, the circuit 24 forms a frequency signal e 6 out of phase with respect to the input signal e 4 as shown in FIG. Since the signal is superimposed on the output signal e5 , the output terminal 2 of the integrating circuits 21 and 22
The output e 1 '' appearing at 7 is shown by the broken line in FIG. 3d, and the difference between the maximum value E 1 and the minimum value E 3 of the instantaneous values is small, and the ripple is smaller than that of the output e 1 '.
以上の如く本考案によれば、周波数電圧変換回
路内の単安定マルチバイブレータ回路を構成する
入力段側の第1NAND回路の出力端と出力段側の
第2NAND回路の出力端間に、前記周波数信号に
比し、位相のずれた周波数の信号を形成するコン
デンサと抵抗の直列回路からなる信号形成回路を
設け、該信号形成回路の信号と前記単安定マルチ
バイブレータ回路の出力信号を重畳したから、周
波数電圧変換回路系の出力がリツプル分の少ない
ものとなり、電動機の回転速度ムラが少なくな
り、定速制御性能を向上することができる。 As described above, according to the present invention, the frequency signal is connected between the output terminal of the first NAND circuit on the input stage side and the output terminal of the second NAND circuit on the output stage side, which constitute the monostable multivibrator circuit in the frequency-voltage conversion circuit. In contrast, by providing a signal forming circuit consisting of a series circuit of a capacitor and a resistor that forms signals with out-of-phase frequencies, and superimposing the signal of the signal forming circuit with the output signal of the monostable multivibrator circuit, the frequency The output of the voltage conversion circuit system has less ripple, the rotation speed of the motor becomes less uneven, and constant speed control performance can be improved.
第１図は従来の速度制御装置を示すブロツク
図、第２図は本考案による速度制御装置の一実施
例を示す電気回路図、第３図は第２図の回路の波
形説明図である。
１……電動機、４……周波数電圧変換回路、２
４……信号形成回路。
FIG. 1 is a block diagram showing a conventional speed control device, FIG. 2 is an electric circuit diagram showing an embodiment of the speed control device according to the present invention, and FIG. 3 is a waveform explanatory diagram of the circuit shown in FIG. 1... Electric motor, 4... Frequency voltage conversion circuit, 2
4...Signal forming circuit.
Claims (1)
し、該周波数信号を直流電圧信号に変換して基準
信号と比較し、その誤差信号により電動機を定速
制御する装置であつて、周波数電圧変換回路４内
の単安定マルチバイブレータ回路１１を構成する
入力段側の第1NAND回路１２の出力端１６と出
力段側の第2NAND回路１３の出力端１８間に、
前記周波数信号に比し、位相のずれた周波数の信
号を形成するコンデンサ２６と抵抗２５の直列回
路からなる信号形成回路２４を設け、該信号形成
回路２４の信号と前記単安定マルチバイブレータ
回路１１の出力信号を重畳したことを特徴とする
電動機の定速制御装置。 A device that detects a frequency signal proportional to the rotational speed of an electric motor, converts the frequency signal into a DC voltage signal, compares it with a reference signal, and controls the electric motor at a constant speed using the error signal, the frequency-voltage conversion circuit 4 Between the output terminal 16 of the first NAND circuit 12 on the input stage side and the output terminal 18 of the second NAND circuit 13 on the output stage side, which constitute the monostable multivibrator circuit 11 in the
A signal forming circuit 24 consisting of a series circuit of a capacitor 26 and a resistor 25 that forms a signal with a frequency out of phase with the frequency signal is provided, and the signal of the signal forming circuit 24 and that of the monostable multivibrator circuit 11 are A constant speed control device for an electric motor, characterized in that an output signal is superimposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979175184U JPS631596Y2 (en) | 1979-12-17 | 1979-12-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979175184U JPS631596Y2 (en) | 1979-12-17 | 1979-12-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5692497U JPS5692497U (en) | 1981-07-23 |
| JPS631596Y2 true JPS631596Y2 (en) | 1988-01-14 |
Family
ID=29685872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1979175184U Expired JPS631596Y2 (en) | 1979-12-17 | 1979-12-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS631596Y2 (en) |
-
1979
- 1979-12-17 JP JP1979175184U patent/JPS631596Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5692497U (en) | 1981-07-23 |
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