JPH04178709A - Electronic loader - Google Patents
Electronic loaderInfo
- Publication number
- JPH04178709A JPH04178709A JP30651190A JP30651190A JPH04178709A JP H04178709 A JPH04178709 A JP H04178709A JP 30651190 A JP30651190 A JP 30651190A JP 30651190 A JP30651190 A JP 30651190A JP H04178709 A JPH04178709 A JP H04178709A
- Authority
- JP
- Japan
- Prior art keywords
- load current
- control element
- current control
- load
- switch
- 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
- 238000001514 detection method Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 6
- 230000032683 aging Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Control Of Voltage And Current In General (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、被試験電源などに接続されて等測的負荷とし
ての機能を果たす電子負荷装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electronic load device that is connected to a power source under test and functions as an isometric load.
［従来の技術］
被試験電源の負荷試験やエージングを行う場合、従来の
電子負荷装置は第４図に示すように構成されていた。第
４図において、ｌは被試験電源、２は電子負荷装置、３
は負荷電流制御素子、４は電流検出抵抗器、５は誤差増
幅器、６は負荷電流設定用の基準電圧発生器、７は負荷
開閉スイッチである。[Prior Art] When carrying out a load test or aging of a power supply under test, a conventional electronic load device is configured as shown in FIG. In Fig. 4, l is the power supply under test, 2 is the electronic load device, and 3 is the power supply under test.
4 is a load current control element, 4 is a current detection resistor, 5 is an error amplifier, 6 is a reference voltage generator for setting the load current, and 7 is a load opening/closing switch.
以上のように構成された従来装置においては、スイッチ
７が閉じられているときには、負荷電流制御素子３およ
び電流検出抵抗器４に負荷電流工。In the conventional device configured as described above, when the switch 7 is closed, a load current is applied to the load current control element 3 and the current detection resistor 4.
が流れる。そして、誤差増幅器５は、電流検出抵抗器４
の検出電圧が基準電圧発生器６の出力電圧と等しくなる
ように負荷電流制御素子３を制御する。換言すれば、誤
差増幅器５ば、基準電圧発生器６の出力電圧によって規
定される一定値の負荷電流■、が流れるように負荷電流
制御素子３を制御する。flows. Then, the error amplifier 5 connects the current detection resistor 4
The load current control element 3 is controlled so that the detected voltage is equal to the output voltage of the reference voltage generator 6. In other words, the error amplifier 5 controls the load current control element 3 so that a constant value of the load current (2) defined by the output voltage of the reference voltage generator 6 flows.
［発明が解決しようとする課題］
ところで、被試験電源１の出力レギュレーション試験を
する場合には、例えば、あらかじめ電子負荷を被試験電
源１の定格値に設定しておいて、その後で負荷開閉スイ
ッチ７を閉じて出力電圧の変動を調べることがある。[Problems to be Solved by the Invention] By the way, when performing an output regulation test of the power supply under test 1, for example, the electronic load is set to the rated value of the power supply under test 1 in advance, and then the load opening/closing switch is set. 7 may be closed to examine fluctuations in the output voltage.
このような場合、スイッチ７が開放状態のときには、電
流検出抵抗器４の検出値は０であり、基準電圧発生器６
は所定の電圧を８カしているために、誤差増幅器５の出
力は飽和８カになっている。この状態でスイッチ７を閉
じると、負荷電流制御素子３の制御端子（ベース）が過
励（オーバードライブ）状態で定格値以上の電流が数ｍ
ｓのオーダーで流れる。このため負荷電流制御素子３の
劣化を速めるという問題点があった。In such a case, when the switch 7 is open, the detection value of the current detection resistor 4 is 0, and the reference voltage generator 6
Since the predetermined voltage is 8, the output of the error amplifier 5 is saturated. When the switch 7 is closed in this state, the control terminal (base) of the load current control element 3 is in an over-excitation (overdrive) state, and a current exceeding the rated value is generated for several meters.
It flows on the order of s. For this reason, there is a problem in that the load current control element 3 deteriorates more quickly.
さらに、負荷開閉スイッチ７は、電子負荷装置の電流容
量に応じた開閉容量のスイッチを使用しなければならな
い。このため、電子負荷装置の容量が数百アンペア以上
になると、それに伴って負荷開閉スイッチ７も大型化し
て装置の小型化を妨げるとともに装置の価格の上昇を招
（。また、このような大型のスイッチは操作性も悪いと
いう問題点もあった。Furthermore, the load switching switch 7 must have a switching capacity that corresponds to the current capacity of the electronic load device. For this reason, when the capacity of an electronic load device increases to several hundred amperes or more, the load switching switch 7 also increases in size, which hinders the downsizing of the device and causes an increase in the price of the device. The switch also had the problem of poor operability.
本発明の目的は、小型のスイッチで負荷の開閉ができて
、操作性がよく、装置の小型化・低廉化を図ることがで
きるとともに、負荷電流制御素子の制御端子の過励状態
を防ぐことができる電子負荷装置を提供することにある
。An object of the present invention is to enable a load to be opened and closed using a small switch, to provide good operability, to reduce the size and cost of the device, and to prevent overexcitation of the control terminal of a load current control element. The purpose of the present invention is to provide an electronic load device that can perform the following tasks.
［課題を解決するための手段］
以上の目的を達成するために本発明は外部の電源が接続
される１対の負荷入力端子と、該１対の負荷入力端子間
に直列接続された電流制御素子および電流検出素子と、
一方の入力端に入力する前記電流検出素子の検出値と他
方の入力端に入力する電圧値との差に対応する電圧を前
記電流制御素子の制御入力端に出力する誤差増幅器と、
該誤差増幅器の他方の入力端に基準電圧を出力する基準
電圧発生手段と、前記誤差増幅器の出力端と前記一方の
入力端との間の設けられたスイッチ手段とを具えること
を特徴とするものである。[Means for Solving the Problems] In order to achieve the above objects, the present invention provides a pair of load input terminals to which an external power source is connected, and a current control system connected in series between the pair of load input terminals. element and current detection element;
an error amplifier that outputs a voltage corresponding to a difference between a detected value of the current detection element input to one input terminal and a voltage value input to the other input terminal to a control input terminal of the current control element;
It is characterized by comprising a reference voltage generating means for outputting a reference voltage to the other input terminal of the error amplifier, and a switch means provided between the output terminal of the error amplifier and the one input terminal. It is something.
［作 用］
本発明においては、スイッチ手段が開放状態のときには
、負荷電流が基準電圧発生手段の出力によって規定され
る値になるように誤差増幅器が電流制御素子を制御する
。[Function] In the present invention, when the switch means is in an open state, the error amplifier controls the current control element so that the load current becomes a value defined by the output of the reference voltage generation means.
そして、スイッチ手段が閉成状態のときには、電流制御
素子の制御端子とその出力端子とが同電位となるため電
流制御素子が負荷電流を遮断する。このとき、誤差増幅
器の出力電圧は基準電圧発生手段の出力値となるために
、電流制卸素子の制御端子に過大電圧が印加されるのを
防ぐことが可能になる。また、スイッチ手段には大電流
が流れないために、スイッチ手段を小容量のもので構成
することができる。When the switch means is in the closed state, the control terminal of the current control element and its output terminal are at the same potential, so that the current control element cuts off the load current. At this time, since the output voltage of the error amplifier becomes the output value of the reference voltage generating means, it becomes possible to prevent excessive voltage from being applied to the control terminal of the current limiting element. Further, since a large current does not flow through the switch means, the switch means can be constructed with a small capacity.
［実施例］ 以下、図面を参照して本発明の詳細な説明する。[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図は本発明の一実施例の構成を示す回路図であり第
４図と同一符号のものは同一のものを示している。また
８は開閉容量の小さいスイッチである。ここで、基準電
圧発生器６の出力電圧の最大値は、負荷電流制御素子３
の制御端子のしきい値以下となるようにあらかじめ定め
られている。FIG. 1 is a circuit diagram showing the configuration of an embodiment of the present invention, and the same reference numerals as in FIG. 4 indicate the same components. Further, 8 is a switch with a small opening/closing capacity. Here, the maximum value of the output voltage of the reference voltage generator 6 is determined by the load current control element 3.
is predetermined to be less than or equal to the threshold value of the control terminal.
以上のように構成された本実施例によれば、スイッチ８
が閉成状態のときには、負荷電流制御素子３のベース・
エミッタ間が短絡状態となるために、負荷電流制御素子
３は遮断状態となって負荷電流は流れない。According to this embodiment configured as described above, the switch 8
is in the closed state, the base of the load current control element 3
Since the emitters are short-circuited, the load current control element 3 is cut off and no load current flows.
また、この状態において、負荷電流制御素子３の制御端
子（ベース）には基準電圧発生器６の出力電圧が出力さ
れている。Further, in this state, the output voltage of the reference voltage generator 6 is output to the control terminal (base) of the load current control element 3.
以上のような状態において、スイッチ８を開放状態にす
ると、負荷電流制御素子３が導通状態になる。このとき
、基準電圧発生器６の出力電圧は、その最大値が負荷電
流制御素子３の制御端子のしきい値以下となるようにあ
らかじめ定めであるために、負荷電流制御素子３の制膏
端子は過励状態とはならない。以後、電流検出抵抗器４
に流れる負荷電流ＩＬが一定値となるように誤差増幅器
５は負荷電流制御素子３を制御する。In the above state, when the switch 8 is opened, the load current control element 3 becomes conductive. At this time, the output voltage of the reference voltage generator 6 is predetermined so that its maximum value is equal to or lower than the threshold value of the control terminal of the load current control element 3. is not an overexcited state. Hereafter, current detection resistor 4
The error amplifier 5 controls the load current control element 3 so that the load current IL flowing through the circuit becomes a constant value.
以上説明した実施例は、負荷電流制御素子３を１つ具え
ているが、負荷電流制御素子３を複数個並列接続すれば
負荷電流の容量を増やすことができる。Although the embodiment described above includes one load current control element 3, the load current capacity can be increased by connecting a plurality of load current control elements 3 in parallel.
第２図は負荷電流制御素子３を複数個並列接続した本発
明の他の実施例の構成を示した回路図である。第２図に
おいて第１図と同一符号のものは同一のものを示してお
り、また、９はエミッタ抵抗器である。本実施例におい
ては、複数個のスイッチ８は連動して動作する。その他
の本実施例の動作は第１区示の実施例の動作と同様であ
るのでその説明は省略する。FIG. 2 is a circuit diagram showing the configuration of another embodiment of the present invention in which a plurality of load current control elements 3 are connected in parallel. In FIG. 2, the same reference numerals as in FIG. 1 indicate the same components, and 9 is an emitter resistor. In this embodiment, the plurality of switches 8 operate in conjunction with each other. The rest of the operation of this embodiment is similar to that of the first embodiment, so a description thereof will be omitted.
以上説明した実施例のスイッチ９は、他の形態のスイッ
チ手段、例えば、第３図（ａ）に示すようにホトトラン
ジスタと発光ダイオードとからなるホトカブラ１１で構
成してもよいし、第３図（ｂ）に示すようにＭＯＳ−Ｆ
ＥＴ１２などの半導体アナログスイッチで構成してもよ
い。このような素子によりスイッチ手段を構成した場合
には、機械的可動部がないので、開閉動作に伴なう劣化
が極めて少なくなるとともに開閉速度を速くすることが
できる。さらに、このような電子的なスイッチを用いれ
ば、遠隔操作を極めて容易に行なうことができる。The switch 9 of the embodiment described above may be configured with other forms of switching means, for example, a photocoupler 11 consisting of a phototransistor and a light emitting diode as shown in FIG. As shown in (b), MOS-F
It may also be configured with a semiconductor analog switch such as ET12. When the switch means is constituted by such an element, since there is no mechanically movable part, deterioration caused by the opening/closing operation is extremely reduced, and the opening/closing speed can be increased. Furthermore, if such an electronic switch is used, remote control can be performed extremely easily.
［発明の効果］
以上説明したように、本発明によれば、小型のスイッチ
で負荷の開閉ができて、操作性がよく、装置の小型化・
低廉化を図ることができるとともに、負荷電流制御素子
の制御端子の過励状態を防ぐことができる。[Effects of the Invention] As explained above, according to the present invention, the load can be opened and closed using a small switch, the operability is good, and the device can be downsized and
It is possible to reduce the cost and prevent the control terminal of the load current control element from being overexcited.
第１図は本発明の一実施例の構成を示す回路図、
第２図は本発明の他の実施例の構成を示す回路図、
第３図（ａ）および（ｂ）はスイッチ手段の構成例を示
す説明図、
第４図は従来装置の構成を示す回路図である。
■・・・被試験電源、
２・・・電子負荷装置、
３・・・負荷電流制御素子、
４・・・電流検出抵抗器、
５・・・誤差増幅器、
６・・・基準電圧発生器、
７・・・負荷開閉スイッチ、
８・・・スイッチ、
９・・・エミッタ抵抗、
１１・・・ホトカブラ、
１２・・・ＭＯＳ−ＦＥＴ 。
第１図
第３図FIG. 1 is a circuit diagram showing the configuration of one embodiment of the present invention, FIG. 2 is a circuit diagram showing the configuration of another embodiment of the present invention, and FIGS. 3(a) and (b) are the configurations of the switch means. An explanatory diagram showing an example. FIG. 4 is a circuit diagram showing the configuration of a conventional device. ■... Power supply under test, 2... Electronic load device, 3... Load current control element, 4... Current detection resistor, 5... Error amplifier, 6... Reference voltage generator, 7...Load opening/closing switch, 8...Switch, 9...Emitter resistor, 11...Photocoupler, 12...MOS-FET. Figure 1 Figure 3
Claims (1)
１対の負荷入力端子間に直列接続された電流制御素子お
よび電流検出素子と、一方の入力端に入力する前記電流
検出素子の検出値と他方の入力端に入力する電圧値との
差に対応する電圧を前記電流制御素子の制御入力端に出
力する誤差増幅器と、該誤差増幅器の他方の入力端に基
準電圧を出力する基準電圧発生手段と、前記誤差増幅器
の出力端と前記一方の入力端との間の設けられたスイッ
チ手段と を具えることを特徴とする電子負荷装置。[Claims] 1) A pair of load input terminals to which an external power source is connected; a current control element and a current detection element connected in series between the pair of load input terminals; an error amplifier that outputs a voltage corresponding to the difference between the input detection value of the current detection element and the voltage value input to the other input terminal to the control input terminal of the current control element; and the other input terminal of the error amplifier. 1. An electronic load device comprising: a reference voltage generating means for outputting a reference voltage to a reference voltage; and a switch means provided between an output terminal of the error amplifier and the one input terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30651190A JPH0652491B2 (en) | 1990-11-13 | 1990-11-13 | Electronic load device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30651190A JPH0652491B2 (en) | 1990-11-13 | 1990-11-13 | Electronic load device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04178709A true JPH04178709A (en) | 1992-06-25 |
| JPH0652491B2 JPH0652491B2 (en) | 1994-07-06 |
Family
ID=17957909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30651190A Expired - Lifetime JPH0652491B2 (en) | 1990-11-13 | 1990-11-13 | Electronic load device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0652491B2 (en) |
-
1990
- 1990-11-13 JP JP30651190A patent/JPH0652491B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0652491B2 (en) | 1994-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6707651B2 (en) | ARC fault or ground fault or ARC fault/ground fault trip signal generator and trip unit employing the same | |
| EP0608974B1 (en) | Base current-control circuit of an output transistor | |
| DE59602580D1 (en) | Circuit arrangement for limiting switching overvoltages on power semiconductor switches | |
| US5398025A (en) | Input module | |
| US5706187A (en) | Switching power source circuitry having a current bypass circuit | |
| KR880013205A (en) | Circuit breaker | |
| JPH04178709A (en) | Electronic loader | |
| JPH02159578A (en) | Circuit apparatus for recognizing non-load | |
| US6281669B1 (en) | Circuit arrangement and method for limiting current for consumers of alternating current | |
| KR200168172Y1 (en) | Solid state relay without power | |
| JPS61254070A (en) | Electronic load device | |
| JPS6037018A (en) | Current limiter | |
| JP2844883B2 (en) | Switch control circuit | |
| SU1745456A1 (en) | Apparatus for controlling welding current source | |
| JP2898997B2 (en) | Solid state relay | |
| JP2836382B2 (en) | DC power supply | |
| SU748630A1 (en) | Device for protecting electric equipment | |
| SU1472888A1 (en) | Stabilized power supply | |
| JP2000092830A (en) | Power supply circuit | |
| JPS58151081A (en) | Laser power source circuit | |
| SU1410002A1 (en) | D.c. voltage stabilizer | |
| SU1325446A2 (en) | Stabilizing power supply source | |
| RU1817178C (en) | Device for overcurrent protection | |
| SU1201822A1 (en) | D.c.voltage stabilizer | |
| SU1287131A1 (en) | D.c.voltage stabilizer with protection |
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: 20080706 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080706 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090706 Year of fee payment: 15 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100706 Year of fee payment: 16 |