JP2886398B2 - Stepping motor drive - Google Patents
Stepping motor driveInfo
- Publication number
- JP2886398B2 JP2886398B2 JP4314222A JP31422292A JP2886398B2 JP 2886398 B2 JP2886398 B2 JP 2886398B2 JP 4314222 A JP4314222 A JP 4314222A JP 31422292 A JP31422292 A JP 31422292A JP 2886398 B2 JP2886398 B2 JP 2886398B2
- Authority
- JP
- Japan
- Prior art keywords
- stepping motor
- current
- overcurrent
- voltage
- motor drive
- 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 - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明はステッピングモ−タのリ
−ド端子の相間短絡，誤接続等により生じる過電流に対
する保護機能を有するようにしたステッピングモ−タの
駆動装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stepping motor driving apparatus having a protection function against an overcurrent caused by short-circuiting between phases of lead terminals of a stepping motor, erroneous connection, and the like.
【０００２】[0002]
【従来の技術】従来のものは図２〜図４に示すように構
成されていた。図２に示す第１の方式のものは，電源電
流を抵抗１ａ〜１ｄとトランジスタ２により検出し，Ｇ
ＴＯサイリスタ３をＯＮさせ，電流供給ライン上に挿入
したヒュ−ズ４を遮断する方式のものである。なお，５
はバッテリ−等の直流電源，６はコンデンサ，７はツェ
ナ−ダイオ−ド，８はモ−タ駆動回路である。また，図
３に示す第２の方式のものは，モ−タ駆動電流の出力側
で電流検出を行い，励磁信号をＯＦＦすることにより，
モ−タ駆動電流を止めて，回路を保護する方式のもの
で，同図中，５は直流電源，８はステッピングモ−タの
駆動回路，９及び１０は夫々ＡＮＤ素子，１１は演算素
子で，各ＡＮＤ素子９及び１０の一方の入力端子には励
磁信号が，他方の入力端子には演算素子１１からのフィ
−ドバック信号が供給されるようになっている。なお，
１１ａ1〜１１ａ5は夫々抵抗である。さらに，図４に示
す第３の方式のものは，電源電流を抵抗１ａ〜１ｄとト
ランジスタ２により検出し，ＧＴＯサイリスタ３をＯＮ
させ，励磁信号をＯＦＦすることによりモ−タ駆動電流
を止めて回路を保護する方式のもので，同図において，
５は直流電源，６はコンデンサ，７はツェナ−ダイオ−
ド，８はモ−タ駆動回路，９及び１０は演算素子，１２
はトランジスタ，１２ａ1〜１２ａ4は夫々抵抗である。2. Description of the Related Art A conventional device is configured as shown in FIGS. In the first type shown in FIG. 2, the power supply current is detected by the resistors 1a to 1d and the transistor 2 and the
In this system, the TO thyristor 3 is turned on and the fuse 4 inserted on the current supply line is cut off. Note that 5
Is a DC power supply such as a battery, 6 is a capacitor, 7 is a Zener diode, and 8 is a motor drive circuit. In the second type shown in FIG. 3, current detection is performed on the output side of the motor drive current, and the excitation signal is turned off.
In this system, the motor drive current is stopped to protect the circuit. In the figure, 5 is a DC power supply, 8 is a stepping motor drive circuit, 9 and 10 are AND elements, 11 is an arithmetic element, An excitation signal is supplied to one input terminal of each of the AND elements 9 and 10, and a feedback signal from the arithmetic element 11 is supplied to the other input terminal. In addition,
11a 1 ~11a 5 is each resistance. In the third type shown in FIG. 4, the power supply current is detected by the resistors 1a to 1d and the transistor 2, and the GTO thyristor 3 is turned on.
In this method, the motor drive current is stopped by turning off the excitation signal to protect the circuit.
5 is a DC power supply, 6 is a capacitor, 7 is a Zener diode.
, 8 is a motor drive circuit, 9 and 10 are arithmetic elements, 12
Transistors, 12a 1 ~12a 4 is each resistance.
【０００３】[0003]
【発明が解決しようとする課題】上述の従来の構成のも
のでは，次のような問題点があった。 第１の方式のものでは，過電流発生時ごとにヒュ−ズ
を交換する必要がある。 第２の方式のものでは，出力側で電流検出を行うもの
であるため，過電流に対する応答が遅れるのと，モ−タ
端子がグランドレベルに短絡した場合には，応答しな
い。 第３の方式のものでは，励磁信号をＯＦＦする方式で
あるため，過電流が発生してからモ−タ駆動電流をＯＦ
Ｆさせるまでの応答時間が遅れてしまい回路を保護しき
れない可能性もある。 本発明は従来のものの上記課題（問題点）を解決するよ
うにしたステッピングモ−タの駆動装置を提供すること
を目的とする。The above-mentioned conventional configuration has the following problems. In the first method, the fuse needs to be replaced every time an overcurrent occurs. In the second type, since current detection is performed on the output side, there is no response when the response to overcurrent is delayed or when the motor terminal is short-circuited to the ground level. In the third method, since the excitation signal is turned off, the motor drive current is turned off after an overcurrent occurs.
There is a possibility that the response time until F is delayed and the circuit cannot be completely protected. SUMMARY OF THE INVENTION An object of the present invention is to provide a driving device for a stepping motor which solves the above-mentioned problems (problems) of the prior art.
【０００４】[0004]
【課題を解決するための手段】本発明のステッピングモ
ータの駆動装置は，上記の課題を解決するために，ステ
ッピングモータの駆動回路への電流供給ラインに直列に
接続した抵抗でステッピングモータ駆動電流を電圧値に
変換した後，スイッチングトランジスタによってグラン
ドレベルを基準とする電圧に変換する過電流検出回路
と，該過電流検出回路の所定値以上の出力電圧によって
作動し自己保持する，所定電源から電流を供給されるサ
イリスタ等の自己保持機能素子と，前記自己保持機能素
子が出力する過電流検知信号によって過電流発生時に電
流供給を電子的に遮断するスイッチング素子によって形
成したスイッチング手段とを，ステッピングモータの駆
動回路とは別に独立して設けるように構成した。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a driving apparatus for a stepping motor according to the present invention is arranged in series with a current supply line to a driving circuit of the stepping motor.
Stepping motor drive current to voltage value with connected resistor
After the conversion,
An overcurrent detection circuit that converts the voltage to a reference voltage, and an output voltage equal to or higher than a predetermined value of the overcurrent detection circuit.
Operate and self-hold.
A self-holding function element such as an iris
It is formed by a switching element that electronically cuts off the current supply when an overcurrent occurs according to the overcurrent detection signal output by the
The constructed switching means is provided independently of the driving circuit of the stepping motor.
【０００５】[0005]
【作用】本発明のものにおいては，過電流の発生と同時
に検出回路がＯＮし，すぐにモ−タの駆動電流供給源で
ある電源を遮断するものであるため，ステッピングモ−
タの駆動回路を確実に保護することができる。In the present invention, the detection circuit is turned on simultaneously with the occurrence of an overcurrent, and the power supply, which is the driving current supply source of the motor, is immediately cut off.
The drive circuit of the power supply can be reliably protected.
【０００６】[0006]
【実施例】以下図１に示す一実施例により本発明を具体
的に説明する。図１において，Ｒ1〜Ｒ9は夫々抵抗，Ｔ
Ｒ1〜ＴＲ9は夫々スイッチング素子としてのスイッチン
グトランジスタ，Ｅ1，Ｅ2は夫々直流電源，ＺＤ1及び
ＺＤ2は夫々ツェナ−ダイオ−ド，ＳＣＲはＧＴＯサイ
リスタ，Ｃはコンデンサ，Ｌはモ−タコイルで，これら
の各素子は図示のように接続して構成される。なお，上
記抵抗Ｒ1〜Ｒ9中，Ｒ1は過電流検出用の抵抗である。
本発明のステッピングモ−タの駆動装置は，上記のよう
な素子を組み合わせて，モ−タ駆動電流切換用スイッチ
ング素子で構成されたステッピングモ−タの駆動回路の
モ−タ電流の供給ライン上に，過電流検出回路と自己保
持回路で形成する過電流検知回路と，この電流検知回路
によって検知した信号によって電流を遮断するスイッチ
ング素子とを設けるようにして構成される。この場合，
ステッピングモ−タの駆動回路８Ａはスイッチングトラ
ンジスタＴＲ4〜ＴＲ7等のモ−タ駆動電流切換用スイッ
チング素子をブリッジに組んで構成され，また，モ−タ
電流供給ライン上に過電流検出用の抵抗Ｒ1を設けるほ
か，これに関連する素子として，過電流時のみＯＮする
過電流検出用のスイッチングトランジスタＴＲ2により
過電流の検出回路を構成し，過電流時にＯＮした電流を
電圧に変換する抵抗Ｒ4，この抵抗Ｒ4の両端に発生した
電圧によってＯＮするＧＴＯサイリスタＳＣＲ，このＳ
ＣＲがＯＮすることによってモ−タの駆動回路への駆動
電流を遮断するスイッチングトランジスタＴＲ1等によ
って，駆動電流を遮断する手段を構成するものである。
なお，スイッチングトランジスタＴＲ3はスイッチング
トランジスタＴＲ1をＯＮ・ＯＦＦするための制御用の
スイッチング素子である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to an embodiment shown in FIG. In FIG. 1, R1 to R9 are resistors, T
R1 to TR9 are switching transistors as switching elements, E1 and E2 are DC power supplies, ZD1 and ZD2 are Zener diodes, SCR is a GTO thyristor, C is a capacitor, and L is a motor coil. The elements are connected and configured as shown. Here, among the resistors R1 to R9, R1 is a resistor for detecting overcurrent.
The stepping motor driving apparatus according to the present invention combines the above-described elements to provide a motor current supply line of a stepping motor driving circuit composed of motor driving current switching switching elements. An overcurrent detection circuit formed by an overcurrent detection circuit and a self-holding circuit, and a switching element for interrupting a current by a signal detected by the current detection circuit are provided. in this case,
The driving circuit 8A of the stepping motor is constructed by assembling a switching element for switching the motor driving current such as switching transistors TR4 to TR7 into a bridge. A resistor R1 for detecting an overcurrent is provided on the motor current supply line. In addition to the above, as an element related thereto, an overcurrent detection circuit is constituted by an overcurrent detection switching transistor TR2 that is turned ON only when an overcurrent occurs, and a resistor R4 that converts the ON current at the time of the overcurrent into a voltage. GTO thyristor SCR that is turned on by the voltage generated across R4,
A means for interrupting the drive current is constituted by a switching transistor TR1 or the like which interrupts the drive current to the motor drive circuit when the CR turns on.
The switching transistor TR3 is a control switching element for turning on / off the switching transistor TR1.
【０００７】上記構成において，過電流が発生した場
合，抵抗Ｒ1の両端に発生する電圧降下によりトランジ
スタＴＲ2がＯＮする。トランジスタＴＲ2がＯＮになる
と，抵抗Ｒ4に電流が流れ，抵抗Ｒ4の両端に電圧が発生
する。従って，この電圧によって，ＧＴＯサイリスタＳ
ＣＲがＯＮとなり，抵抗Ｒ5に電圧降下が発生し，ツェ
ナ−ダイオ−ドＺＤ2のカソ−ド電位が下がる。ツェナ
−ダイオ−ドＺＤ2のカソ−ド電位がツェナ−ダイオ−
ドＺＤ2のツェナ−電圧以下に下がると，トランジスタ
ＴＲ3のベ−スに電流が供給されなくなり，トランジス
タＴＲ3はＯＦＦとなる。従って，トランジスタＴＲ1の
ゲ−ト−ソ−ス間電圧は０Ｖに近づきスイッチングトラ
ンジスタＴＲ1もＯＦＦとなり，モ−タ駆動回路８Ａへ
の電流が遮断される。サイリスタＳＣＲは一度トリガさ
れるとそのＯＮ状態は保持，即ち，自己保持されるの
で，電源＋Ｅ2からの供給を一旦止めてから再投入する
まで，モ−タ駆動回路８Ａへの電流は供給されなくな
る。In the above configuration, when an overcurrent occurs, the transistor TR2 turns on due to a voltage drop across the resistor R1. When the transistor TR2 is turned on, a current flows through the resistor R4, and a voltage is generated across the resistor R4. Accordingly, this voltage, GTO thyristor S
CR turns ON, a voltage drop occurs in the resistor R5, and the cathode potential of the Zener diode ZD2 drops. The cathode potential of the Zener diode ZD2 is
When the voltage drops below the Zener voltage of the gate ZD2, no current is supplied to the base of the transistor TR3, and the transistor TR3 is turned off. Therefore, the gate-source voltage of the transistor TR1 approaches 0V, the switching transistor TR1 is also turned off, and the current to the motor drive circuit 8A is cut off. Once the thyristor SCR is triggered once, its ON state is maintained, that is, it is self-maintained. Therefore, current is not supplied to the motor drive circuit 8A until the supply from the power supply + E2 is temporarily stopped and then turned on again. .
【０００８】[0008]
【発明の効果】本発明のステッピングモ−タの駆動装置
は，上記のように構成されるから，モ−タ端子が短絡等
の場合に，モータ駆動回路への電流供給ライン上に設け
た過電流検出回路の出力により動作する自己保持機能を
有する制御素子（ＧＴＯサイリスタＳＣＲ）により上記
電流供給ライン上に設けたスイッチング素子（トランジ
スタＴＲ1）をＯＦＦすると共に，このＯＦＦ状態を保
持し，かつ容易に通常動作に復帰させることができるの
で，本装置の動作効率を向上することができるという優
れた効果を有する。The driving device for a stepping motor according to the present invention is constructed as described above. Therefore, when the motor terminal is short-circuited or the like, an overcurrent provided on a current supply line to the motor driving circuit is provided. The switching element (transistor TR1) provided on the current supply line is turned off by a control element (GTO thyristor SCR) having a self-holding function operated by the output of the detection circuit, and this OFF state is maintained, and the normal state is easily achieved. Since the operation can be restored, there is an excellent effect that the operation efficiency of the present apparatus can be improved.
【図１】本発明の一実施例を示す接続図である。FIG. 1 is a connection diagram showing one embodiment of the present invention.
【図２】従来の第１の方式を示す接続図である。FIG. 2 is a connection diagram showing a first conventional method.
【図３】従来の第２の方式を示す接続図である。FIG. 3 is a connection diagram showing a second conventional method.
【図４】従来の第３の方式を示す接続図である。FIG. 4 is a connection diagram showing a third conventional method.
Ｒ1：過電流検出用の抵抗 ＴＲ2：過電流検出用のスイッチングトランジスタ（ス
イッチング素子） Ｒ4：過電流遮断用の抵抗 ＳＣＲ：過電流遮断用のサイリスタ ＴＲ1：過電流遮断用のスイッチングトランジスタ（ス
イッチング素子）R 1: the resistance TR 2 for overcurrent detection: switching transistor for overcurrent detection (switching element) R 4: resistance SCR for blocking overcurrent: Thyristor for interrupting the overcurrent TR 1: switching transistor for blocking overcurrent (Switching element)
Claims (1)
給ラインに直列に接続した抵抗でステッピングモータ駆
動電流を電圧値に変換した後，スイッチングトランジス
タによってグランドレベルを基準とする電圧に変換する
過電流検出回路と，該過電流検出回路の所定値以上の出
力電圧によって作動し自己保持する所定電源から電流を
供給されるサイリスタ等の自己保持機能素子と，前記自
己保持機能素子が出力する過電流検知信号によって過電
流発生時に電流供給を電子的に遮断するスイッチング素
子によって形成したスイッチング手段とを，ステッピン
グモータの駆動回路とは別に独立して設けるようにした
ことを特徴とするステッピングモータの駆動装置。1. A stepping motor drive system comprising a resistor connected in series to a current supply line to a drive circuit of the stepping motor.
After the dynamic current is converted to a voltage value, the switching transistor
An overcurrent detection circuit for converting the voltage to a voltage with reference to the ground level by a power supply, and an output exceeding a predetermined value of the overcurrent detection circuit.
Current from a predetermined power supply that is self-holding
A self-holding function element such as a thyristor to be supplied;
A switching element that electronically cuts off the current supply when an overcurrent occurs according to the overcurrent detection signal output by the self-holding function element.
A stepping motor drive device, wherein a switching means formed by a child is provided independently of a drive circuit of the stepping motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4314222A JP2886398B2 (en) | 1992-10-30 | 1992-10-30 | Stepping motor drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4314222A JP2886398B2 (en) | 1992-10-30 | 1992-10-30 | Stepping motor drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06153595A JPH06153595A (en) | 1994-05-31 |
| JP2886398B2 true JP2886398B2 (en) | 1999-04-26 |
Family
ID=18050760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4314222A Expired - Fee Related JP2886398B2 (en) | 1992-10-30 | 1992-10-30 | Stepping motor drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2886398B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK1109281T3 (en) * | 1999-12-17 | 2006-10-23 | Vaillant Gmbh | Current limiting circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0360399A (en) * | 1989-07-26 | 1991-03-15 | Koufu Nippon Denki Kk | Stepping motor driving circuit |
-
1992
- 1992-10-30 JP JP4314222A patent/JP2886398B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06153595A (en) | 1994-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2504586B2 (en) | Electronic circuit device having off-ground protection circuit | |
| US5530788A (en) | Electric motor drive control apparatus | |
| US20080247108A1 (en) | Load drive device | |
| JP2003274636A (en) | Solid state relay | |
| JPH06209592A (en) | Circuit configuration feeding inductive load | |
| JP2886398B2 (en) | Stepping motor drive | |
| JPH0473327B2 (en) | ||
| JP4739541B2 (en) | AC chopper device | |
| JP3282378B2 (en) | Power element drive protection circuit and MOSFET drive protection circuit | |
| JP3676168B2 (en) | Power supply control device | |
| JPH01220915A (en) | Output short-circuit protection circuit for transistor | |
| JPH0191620A (en) | H-bridge protective circuit | |
| JPH0742197Y2 (en) | Load drive device with protection function | |
| JPH11299223A (en) | Switching power unit | |
| JP3286875B2 (en) | Power supply overcurrent protection circuit | |
| JPS6216019A (en) | Output short circuiting protection circuit for switching power source | |
| JPS6111011B2 (en) | ||
| JPH0526903Y2 (en) | ||
| JPH0739063A (en) | Overcurrent protection apparatus | |
| JPS5941620Y2 (en) | Overload detection circuit | |
| JPS58107074A (en) | Protective device for inverter | |
| JPH0746901B2 (en) | Low voltage detection circuit | |
| JPH04109864A (en) | Switching power source | |
| JPS58175926A (en) | Method of protecting output circuit | |
| JPH0631529Y2 (en) | Positive / negative output overvoltage protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090212 Year of fee payment: 10 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090212 Year of fee payment: 10 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100212 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |