JP2594938B2 - Speed signal detection circuit of electromagnetic drive - Google Patents
Speed signal detection circuit of electromagnetic driveInfo
- Publication number
- JP2594938B2 JP2594938B2 JP62082662A JP8266287A JP2594938B2 JP 2594938 B2 JP2594938 B2 JP 2594938B2 JP 62082662 A JP62082662 A JP 62082662A JP 8266287 A JP8266287 A JP 8266287A JP 2594938 B2 JP2594938 B2 JP 2594938B2
- Authority
- JP
- Japan
- Prior art keywords
- drive
- coil
- detection resistor
- current detection
- speed 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 title claims description 49
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Control Of Linear Motors (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はボイスコイル型モーター、ブリッジ制御モー
ター等の電磁駆動装置の速度信号検出回路に関する。Description: TECHNICAL FIELD The present invention relates to a speed signal detection circuit of an electromagnetic drive device such as a voice coil type motor and a bridge control motor.
（従来の技術） 従来、電磁駆動装置の速度信号検出回路としては速度
検出コイルを用いない第３図に示すようなものがある。
図中Ｌは１コイルタイプのボイスコイル型モーター、円
筒サーボモーター等の電磁駆動装置における駆動コイ
ル、Ｒは駆動電流検出抵抗、R1は駆動出力検出抵抗、C1
は駆動出力検出コンデンサー、VR1，VR2は半固定抵抗、
11は駆動コイルＬを駆動して移動させる出力回路、12は
演算回路である。(Prior Art) Conventionally, as a speed signal detection circuit of an electromagnetic drive device, there is one as shown in FIG. 3 which does not use a speed detection coil.
In the figure, L is a drive coil in an electromagnetic drive device such as a one-coil type voice coil type motor or a cylindrical servomotor, R is a drive current detection resistor, R 1 is a drive output detection resistor, C 1
Is a drive output detection capacitor, VR 1 and VR 2 are semi-fixed resistors,
Reference numeral 11 denotes an output circuit that drives and moves the drive coil L, and 12 denotes an arithmetic circuit.
ここで複素変数をＳ、駆動コイルＬの抵抗成分の伝達
関数をＧ（ｓ）1、抵抗R1およびコンデンサ−C1の直列
回路におけるコンデンサーC1の伝達関数をＧ（ｓ）2と
してL/R＝C1R1＝Ｔなる条件を満足するように設定すれ
ば となり、Ｇ（ｓ）1＝Ｇ（ｓ）2となって駆動電流と逆起
電圧をコンデンサーC1と抵抗R1によって分離することが
でき、電磁駆動装置の静止状態では駆動電流検出抵抗Ｒ
の両端電圧をeR、インダクタンスＬによる逆起電圧を
eL、駆動出力検出抵抗R1の両端電圧をeR1、駆動出力検
出コンデンサーの両端電圧をeC1とすると、 eL＝eR1，eR＝eC1 になる。一方速度信号は電磁駆動装置の磁気回路内の導
体、すなわち駆動コイルに発生していることになり、い
ま電磁駆動装置（駆動コイル）の速度に比例した速度信
号電圧e1を抵抗Ｒに生じさせる速度比例電流をIR、駆動
出力回路11の出力インピーダンスおよび出力電圧をriお
よびei、駆動コイルの直流抵抗をr1、電磁駆動装置の磁
気回路の磁束密度をＢ、駆動コイルの有効長をｌ、駆動
コイルの速度をｖとすると、e1＝Blvとなり、電磁駆動
装置の駆動状態ではインピーダンスriが極めて小さいす
れば駆動電流検出抵抗Ｒの両端電圧はe1が加算されてeR
＋e1＝ｅ′Rになる。Here, the complex variable is S, the transfer function of the resistance component of the drive coil L is G (s) 1 , and the transfer function of the capacitor C 1 in the series circuit of the resistor R 1 and the capacitor C 1 is G (s) 2 , where L / R = C 1 R 1 = T G (s) 1 = G (s) 2 , so that the drive current and the back electromotive voltage can be separated by the capacitor C 1 and the resistor R 1. In the stationary state of the electromagnetic drive device, the drive current detection resistor R
The voltage across e R, a counter electromotive voltage due to the inductance L
If e L , the voltage across the drive output detection resistor R 1 is e R1 , and the voltage across the drive output detection capacitor is e C1 , then e L = e R1 , e R = e C1 . On the other hand, the speed signal is generated in a conductor in the magnetic circuit of the electromagnetic drive device, that is, the drive coil, and a speed signal voltage e 1 proportional to the speed of the electromagnetic drive device (drive coil) is generated in the resistor R. IR for speed proportional current, ri and ei for output impedance and output voltage of drive output circuit 11, r1 for DC resistance of drive coil, B for magnetic flux density of magnetic circuit of electromagnetic drive device, l for effective length of drive coil Assuming that the speed of the coil is v, e 1 = Blv. In the driving state of the electromagnetic driving device, if the impedance ri is extremely small, the voltage across the driving current detecting resistor R is added by e 1 to e R
+ E 1 = e ′ R
従って演算回路12によってｅ′R−eC1の演算をすればe1
が得られる。Therefore, if the arithmetic circuit 12 calculates e ′ R −e C1 , e 1
Is obtained.
（発明が解決しようとする問題点） しかしこの電磁駆動装置の速度信号検出回路で駆動コ
イルＬと駆動電流検出抵抗Ｒの温度係数が異なっている
か又は駆動コイルＬと駆動電流検出抵抗Ｒが温度的に同
一環境にないと、そのバランスがずれて使用できなくな
る。(Problems to be Solved by the Invention) However, in the speed signal detection circuit of this electromagnetic drive device, the temperature coefficient of the drive coil L and the drive current detection resistor R are different, or the drive coil L and the drive current detection resistor R are different in temperature. If they are not in the same environment, they cannot be used because the balance is shifted.
（問題点を解決するための手段） 本発明は電磁駆動装置の駆動コイルと直列に駆動電流
検出抵抗を接続するとともに、該駆動電流検出抵抗を上
記駆動コイルと同一の導電線材を用いて折り返して形成
し、この駆動コイルに駆動電流検出抵抗を隣接させ、か
つ上記駆動コイルと駆動電流検出抵抗とに並列になるよ
うに駆動出力検出抵抗と駆動出力検出コンデンサーを直
列に接続する。(Means for Solving the Problems) In the present invention, a drive current detection resistor is connected in series with a drive coil of an electromagnetic drive device, and the drive current detection resistor is folded back using the same conductive wire as the drive coil. A drive current detection resistor is adjacent to the drive coil, and a drive output detection resistor and a drive output detection capacitor are connected in series so as to be parallel to the drive coil and the drive current detection resistor.
（作用） 本発明では上記駆動電流検出抵抗の両端電圧と上記駆
動出力検出コンデンサーの両端電圧を比較演算して上記
駆動コイルの速度信号を検出する。(Operation) In the present invention, a voltage signal across the drive current detection resistor and a voltage across the drive output detection capacitor are compared to calculate a speed signal of the drive coil.
（実施例） 第１図は本発明の一実施例を示す。(Embodiment) FIG. 1 shows an embodiment of the present invention.
この実施例は上記従来の電磁駆動装置の速度信号検出
回路において、電流検出抵抗Ｒを駆動コイルＬと同一の
導電線材を用いて折り返して抵抗R2として形成し、第２
図に示すように駆動コイルＬに隣接させたものである。
この電流検出抵抗R2は第２図に示すように駆動コイルＬ
に巻き付けるが、できるだけ駆動コイルＬの中心部（巻
回層の表面からやや埋め込まれた左右、表裏の中心部）
に埋め込むとよい。This embodiment is the speed signal detection circuit of the conventional electromagnetic drive unit, to form a current detection resistor R as the resistance R 2 is folded back by using the same conductive wire and the drive coil L, the second
It is adjacent to the drive coil L as shown in the figure.
Driving coil L, as the current detection resistor R 2 is shown in Figure 2
But the center of the driving coil L as much as possible (left and right, front and back center slightly embedded from the surface of the winding layer)
It is good to embed in.
電磁駆動装置の速度信号検出回路において上記問題点
を解決するには電流検出抵抗と駆動コイルが温度的に同
一環境になることと、同一温度係数になることが大切で
ある。そこでこの実施例では電流検出抵抗R2は駆動コイ
ルＬに使用するものと同一の導電線材を用い、これを折
り返して（ツイスト上でもよい）磁気的に結合しないよ
うにしたものを駆動コイルＬに巻き付け、温度係数およ
び温度環境を駆動コイルＬと同一条件にしている。温度
条件については環境条件の他の駆動電流による発熱も考
えられるが、そのような状況においても電流検出抵抗R2
を構成している導電線材の抵抗率が全体にわたって同一
条件であるので、駆動コイルＬと電流検出抵抗R2のバラ
ンスがくずれない（抵抗比が変化しない）等の特徴を持
っている。なお、上述の磁気的に結合しないとは電流検
出抵抗R2には駆動コイルＬから出る磁束または駆動コイ
ルＬの移動速度によって発生する起電力などによる電流
が誘起されないことを言う。In order to solve the above problem in the speed signal detection circuit of the electromagnetic drive device, it is important that the current detection resistor and the drive coil have the same temperature environment and have the same temperature coefficient. So the current detection resistor R 2 is using the same conductive wire to the type used for driving the coil L in this embodiment, by folding it (or on twisted) those who do not magnetically coupled to the drive coil L The winding, the temperature coefficient, and the temperature environment are the same as those of the drive coil L. Regarding temperature conditions, heat generated by other driving currents in environmental conditions can be considered, but even in such a situation, the current detection resistor R 2
Are the same conditions over the entire structure to have conductive wire material resistivity, and has features such as no unbalanced drive coil L and the current detection resistor R 2 (resistance ratio does not change). Note that not magnetically coupled above the current detection resistor R 2 refers to the current due to the electromotive force generated by the movement speed of the magnetic flux or the drive coil L exits from the drive coil L is not induced.
本発明は上述の如く１コイル式のボイスコイル型モー
ターやブリッジ制御モーター等の電磁駆動装置の速度信
号検出回路において温度的バランスをとるのに有効であ
る。The present invention is effective in achieving a temperature balance in a speed signal detection circuit of an electromagnetic drive device such as a one-coil voice coil type motor or a bridge control motor as described above.
（発明の効果） 以上のように本発明によれば駆動電流検出抵抗を駆動
コイルと同一の導電線材を用いて折り返して形成し、こ
の駆動コイルに駆動電流検出抵抗を隣接させたので、駆
動コイルと駆動電流検出抵抗を温度係数的にも温度環境
的にも同一の条件にして速度信号の検出を安定化するこ
とができ、性能を大幅に向上させることができる。(Effect of the Invention) As described above, according to the present invention, the drive current detection resistor is formed by folding back using the same conductive wire as the drive coil, and the drive current detection resistor is adjacent to the drive coil. The speed signal detection can be stabilized under the same conditions for the drive current detection resistor and the temperature coefficient and the temperature environment, and the performance can be greatly improved.
第１図は本発明の一実施例を示す回路図、第２図は同実
施例の駆動コイルおよび駆動電流検出抵抗を示す斜視
図、第３図は従来の電磁駆動装置の速度信号検出回路を
示す回路図である。 Ｌ……駆動コイル、R1……駆動出力検出抵抗、R2……駆
動電流検出抵抗、C1……駆動出力検出コンデンサー。FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a perspective view showing a drive coil and a drive current detection resistor of the embodiment, and FIG. 3 is a diagram showing a speed signal detection circuit of a conventional electromagnetic drive device. FIG. L: drive coil, R 1: drive output detection resistor, R 2: drive current detection resistor, C 1: drive output detection capacitor.
Claims (1)
流検出抵抗を接続するとともに、該駆動電流検出抵抗を
上記駆動コイルと同一の導電線材を用いて折り返して形
成し、この駆動コイルに上記駆動電流検出抵抗を隣接さ
せ、かつ上記駆動コイルと上記駆動電流検出抵抗とに並
列になるように駆動出力検出抵抗と駆動出力検出コンデ
ンサーを直列に接続し、上記駆動電流検出抵抗の両端電
圧と上記駆動出力検出コンデンサーの両端電圧を比較演
算して上記駆動コイルの速度信号を検出するようにした
電磁駆動装置の速度信号検出回路。A drive current detection resistor is connected in series with a drive coil of an electromagnetic drive device, and the drive current detection resistor is formed by folding back using the same conductive wire as the drive coil. A drive current detection resistor is adjacent to the drive current detection resistor, and a drive output detection resistor and a drive output detection capacitor are connected in series so as to be parallel to the drive coil and the drive current detection resistor. A speed signal detection circuit of an electromagnetic drive device, wherein a voltage signal between both ends of a drive output detection capacitor is compared to detect a speed signal of the drive coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62082662A JP2594938B2 (en) | 1987-04-03 | 1987-04-03 | Speed signal detection circuit of electromagnetic drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62082662A JP2594938B2 (en) | 1987-04-03 | 1987-04-03 | Speed signal detection circuit of electromagnetic drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63249483A JPS63249483A (en) | 1988-10-17 |
| JP2594938B2 true JP2594938B2 (en) | 1997-03-26 |
Family
ID=13780647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62082662A Expired - Lifetime JP2594938B2 (en) | 1987-04-03 | 1987-04-03 | Speed signal detection circuit of electromagnetic drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2594938B2 (en) |
-
1987
- 1987-04-03 JP JP62082662A patent/JP2594938B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63249483A (en) | 1988-10-17 |
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