JPS646743U - - Google Patents
Info
- Publication number
- JPS646743U JPS646743U JP9842087U JP9842087U JPS646743U JP S646743 U JPS646743 U JP S646743U JP 9842087 U JP9842087 U JP 9842087U JP 9842087 U JP9842087 U JP 9842087U JP S646743 U JPS646743 U JP S646743U
- Authority
- JP
- Japan
- Prior art keywords
- servo motor
- value
- current
- predetermined value
- exceeds
- 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.)
- Granted
Links
- 238000012544 monitoring process Methods 0.000 claims 8
- 230000001133 acceleration Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 101000746134 Homo sapiens DNA endonuclease RBBP8 Proteins 0.000 description 1
- 101000969031 Homo sapiens Nuclear protein 1 Proteins 0.000 description 1
- 102100021133 Nuclear protein 1 Human genes 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Protection Of Generators And Motors (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図ａ，ｂは本実施例の動作を示すタイムチヤート
、第３図はＤＣサーボモータの駆動回路を示す回
路図、第４図は第３図の回路の動作を示すタイム
チヤート、第５図は第１の従来例を示す回路図、
第６図は第２の従来例を示す回路図、第７図は第
３の従来例を示す回路図である。
ＣＯＭ１，ＣＯＭ２，ＣＯＭ４…コンパレータ
、ＩＣ１…インバータ、ＩＣ２…アンドゲート、
ＩＣ４…オアゲート、Ｔｒ１，Ｔｒ４，Ｔｒ５…
トランジスタ、Ｒ１，Ｒ４〜Ｒ１５，ＲＥ…抵抗
、Ｃ…コンデンサ、Ｄ１，Ｄ２…ダイオード。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
Figures a and b are time charts showing the operation of this embodiment, Figure 3 is a circuit diagram showing the drive circuit of the DC servo motor, Figure 4 is a time chart showing the operation of the circuit in Figure 3, and Figure 5 is a time chart showing the operation of the circuit in Figure 3. A circuit diagram showing a first conventional example,
FIG. 6 is a circuit diagram showing a second conventional example, and FIG. 7 is a circuit diagram showing a third conventional example. COM1, COM2, COM4...Comparator, IC1...Inverter, IC2...And gate,
IC4...OR gate, Tr1, Tr4, Tr5...
Transistor, R1, R4 to R15, RE...Resistor, C...Capacitor, D1, D2...Diode.
Claims (1)
第１の所定値を越えたか否かを監視する第１の監
視手段と、 ＤＣサーボモータに供給される電流の値が前記
第１の所定値より小さい値の第２の所定値を越え
たか否かを監視する第２の監視手段と、 ＤＣサーボモータに供給される電流の値が第２
の所定値を越えている状態が継続している時間が
所定時間より長いか否かを監視する第３の監視手
段と、 前記第１の監視手段によりＤＣサーボモータに
供給される電流の値が第１の所定値を越えたこと
を検出したとき、または前記第２の監視手段及び
前記第３の監視手段によりＤＣサーボモータに供
給される電流の値が第２の所定値を越えて前記所
定時間より長い時間継続したことを検出したとき
、ＤＣサーボモータへの電流の供給を遮断する遮
断手段とを有することを特徴とするＤＣサーボモ
ータの過負荷保護回路。 (2) 前記第１の所定値が前記ＤＣサーボモータ
の最大電流値であることを特徴とする実用新案登
録請求の範囲第１項に記載のＤＣサーボモータの
過負荷保護回路。 (3) 前記第２の所定値が前記ＤＣサーボモータ
の定格電機子電流値であることを特徴とする実用
新案登録請求の範囲第１項に記載のＤＣサーボモ
ータの過負荷保護回路。 (4) 前記所定時間がＤＣサーボモータの十分な
加減速領域時間であることを特徴とする実用新案
登録請求の範囲第１項に記載のＤＣサーボモータ
の過負荷保護回路。[Claims for Utility Model Registration] (1) First monitoring means for monitoring whether the value of the current supplied to the DC servo motor exceeds a first predetermined value; and the current supplied to the DC servo motor. a second monitoring means for monitoring whether the value of the current exceeds a second predetermined value that is smaller than the first predetermined value;
a third monitoring means for monitoring whether the time period in which the current exceeds a predetermined value is longer than a predetermined time; When it is detected that the current value exceeds the first predetermined value, or when the value of the current supplied to the DC servo motor by the second monitoring means and the third monitoring means exceeds the second predetermined value. 1. An overload protection circuit for a DC servo motor, comprising: a cutoff means for cutting off the supply of current to the DC servo motor when it is detected that the current has continued for a longer time than the specified time. (2) The overload protection circuit for a DC servo motor according to claim 1, wherein the first predetermined value is a maximum current value of the DC servo motor. (3) The overload protection circuit for a DC servo motor according to claim 1, wherein the second predetermined value is a rated armature current value of the DC servo motor. (4) The overload protection circuit for a DC servo motor according to claim 1, wherein the predetermined time is a sufficient acceleration/deceleration range time of the DC servo motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987098420U JPH0736448Y2 (en) | 1987-06-29 | 1987-06-29 | Overload protection circuit for DC servo motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987098420U JPH0736448Y2 (en) | 1987-06-29 | 1987-06-29 | Overload protection circuit for DC servo motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS646743U true JPS646743U (en) | 1989-01-13 |
| JPH0736448Y2 JPH0736448Y2 (en) | 1995-08-16 |
Family
ID=31324666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987098420U Expired - Lifetime JPH0736448Y2 (en) | 1987-06-29 | 1987-06-29 | Overload protection circuit for DC servo motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0736448Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4313780Y1 (en) * | 1967-07-11 | 1968-06-12 |
-
1987
- 1987-06-29 JP JP1987098420U patent/JPH0736448Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4313780Y1 (en) * | 1967-07-11 | 1968-06-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0736448Y2 (en) | 1995-08-16 |
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