JP2844423B2 - Electronic load device - Google Patents
Electronic load deviceInfo
- Publication number
- JP2844423B2 JP2844423B2 JP15965494A JP15965494A JP2844423B2 JP 2844423 B2 JP2844423 B2 JP 2844423B2 JP 15965494 A JP15965494 A JP 15965494A JP 15965494 A JP15965494 A JP 15965494A JP 2844423 B2 JP2844423 B2 JP 2844423B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- electronic load
- current
- equation
- load device
- 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
Landscapes
- Control Of Voltage And Current In General (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
【０００１】[0001]
【産業上の利用分野】電子負荷装置を定電圧モードで動
作させる場合、電子負荷装置の等価直列抵抗と、定電圧
設定電圧を任意にしかも独立に可変できるようにして、
蓄電池などの充電時特性と等価な電圧・電流特性を得ら
れるようにして電子負荷の利用範囲を広げる。BACKGROUND OF THE INVENTION When an electronic load is operated in a constant voltage mode, an equivalent series resistance of the electronic load and a constant voltage setting voltage can be arbitrarily and independently varied.
The use range of the electronic load is expanded by obtaining voltage and current characteristics equivalent to the characteristics at the time of charging a storage battery or the like.
【０００２】[0002]
【従来の技術】従来の電子負荷装置を定電圧モードで使
用した場合、等価直列抵抗を変化することができなかっ
たり、可変できても定電圧の設定電圧と等価直列抵抗を
独立に可変することができず、蓄電池などと等価な特性
を得ることが困難であった。2. Description of the Related Art When a conventional electronic load device is used in a constant voltage mode, the equivalent series resistance cannot be changed, or even if the equivalent series resistance can be changed, the set voltage of the constant voltage and the equivalent series resistance are independently changed. Therefore, it was difficult to obtain characteristics equivalent to a storage battery or the like.
【０００３】[0003]
【発明が解決しようとする課題】本発明は定電圧特性の
設定値と等価直列抵抗を任意に、しかもそれぞれの値を
独立に可変できるようにして、電子負荷装置の応用範囲
を広げようとするものである。SUMMARY OF THE INVENTION The present invention seeks to expand the application range of an electronic load device by allowing the set value of the constant voltage characteristic and the equivalent series resistance to be arbitrarily varied and independently changing the respective values. Things.
【０００４】[0004]
【作用】図１の原理図において、ＶＬを電子負荷装置の
端子電圧、Ａ１を増幅器、Ｔｒは増幅器Ａ１の出力をさ
らに増幅するトランジスタ、ＥＲを基準電圧、ＲＥを電
流検出用抵抗器、Ａ２を電流検出抵抗器ＲＥの端子電圧
を電圧利得Ｇ２で増幅する増幅器とし、増幅器Ａ１の入
力電流を無視すると、この増幅器Ａ１は直列抵抗Ｒ１、
Ｒ２、Ｒ３のそれぞれの抵抗を流れる電流の総和がゼロ
になるように動作するので数１となる、したがって数１
より端子電圧ＶＬを求めると数２となる。ここで負荷電
流をＩＬとすると数３と数４の条件となるのでＩＬ＝Ｉ
Ｅとすると数２は数５となる。ここでＩＬの変化ΔＩＬ
に対するＶＬの変化ΔＶＬを数５より求めると数６とな
り、等価直列抵抗ΔＲは数７となる。また、数５でＩＬ
＝０としてこの時の電圧をＶＬＯとすると数８となる。
したがって、数７より等価直列抵抗ΔＲをＧ２によって
制御でき、数８により電流が０の場合の端子電圧ＶＬ０
が決定されるので、ＥＲによってそれぞれの特性を独立
に制御できる。したがって図１に示した回路の電圧・電
流特性は図２の特性となり、等価回路は理想ダイオード
をＤとすると図３となる。In the principle diagram of FIG. 1, VL is a terminal voltage of the electronic load device, A1 is an amplifier, Tr is a transistor for further amplifying the output of the amplifier A1, ER is a reference voltage, RE is a current detecting resistor, and A2 is a current detecting resistor. Assuming that the terminal voltage of the current detection resistor RE is an amplifier for amplifying the terminal voltage by the voltage gain G2 and ignoring the input current of the amplifier A1, the amplifier A1 has a series resistance R1,
Since the operation is performed so that the sum of the currents flowing through the respective resistors of R2 and R3 becomes zero, Equation 1 is obtained.
When the terminal voltage VL is further obtained, Expression 2 is obtained. Here, assuming that the load current is IL, the conditions of Expressions 3 and 4 are satisfied.
Assuming E, Equation 2 becomes Equation 5. Where IL change ΔIL
When the change ΔVL of VL with respect to is obtained from Expression 5, Expression 6 is obtained, and the equivalent series resistance ΔR is Expression 7. Also, in equation 5, IL
Assuming that V = 0 and the voltage at this time is VLO, Equation 8 is obtained.
Accordingly, the equivalent series resistance ΔR can be controlled by G2 according to Equation 7, and the terminal voltage VL0 when the current is 0 can be controlled according to Equation 8.
Is determined, each characteristic can be independently controlled by the ER. Therefore, the voltage / current characteristics of the circuit shown in FIG. 1 are as shown in FIG. 2, and the equivalent circuit is shown in FIG.
【０００５】[0005]
【実施例】図４に具体的実施例を示す。この回路で電子
負荷の端子電圧ＶＬは演算増幅器ＡＶによって−Ｒ５／
Ｒ４倍され、直列抵抗Ｒ１に加えられる。基準電圧ＥＲ
は利得が可変可能な制御素子ＤＡ１によって乗算係数を
乗じて抵抗Ｒ２に加える。また、負荷電流に比例した電
圧を電流検出抵抗ＲＥの端子電圧から得て、この電圧を
利得可変素子ＤＡ２で乗算係数を乗じて抵抗Ｒ３に加え
る。抵抗Ｒ１、Ｒ２、Ｒ３を流れる電流はそれぞれ加算
されて増幅器Ａ１に加わりこの加算電流がゼロになるよ
うにトランジスタＴｒを制御する。この結果、端子電圧
ＶＬはＤＡ１の電圧利得をＧ１、ＤＡ２の電圧利得をＧ
２とすると数１と同様にして数９が得られ、ＶＬは数１
０で決定するので、Ｇ１を可変するとＩＬ＝０の場合の
電圧を任意に設定でき、Ｇ２を可変すると等価直列抵抗
ΔＶＬ／ΔＩＬを設定することが可能である。可変利得
素子ＤＡ１、ＤＡ２は可変利得の増幅器を利用しても目
的を達成できるが乗算型デジタル・アナログ変換器を利
用すると定電圧設定値と等価直列抵抗をデジタル信号で
独立にしかも正確に設定することが可能である。FIG. 4 shows a specific embodiment. In this circuit, the terminal voltage VL of the electronic load is -R5 /
It is multiplied by R4 and added to the series resistance R1. Reference voltage ER
Is multiplied by a multiplication coefficient by a control element DA1 having a variable gain and added to a resistor R2. Further, a voltage proportional to the load current is obtained from the terminal voltage of the current detection resistor RE, and this voltage is multiplied by a multiplication coefficient by the gain variable element DA2 and added to the resistor R3. The currents flowing through the resistors R1, R2, and R3 are respectively added and added to the amplifier A1 to control the transistor Tr so that the added current becomes zero. As a result, as for the terminal voltage VL, the voltage gain of DA1 is G1 and the voltage gain of DA2 is G.
Assuming that 2, Equation 9 is obtained in the same manner as Equation 1, and VL is Equation 1
Since it is determined as 0, it is possible to arbitrarily set the voltage in the case of IL = 0 by varying G1, and to set the equivalent series resistance ΔVL / ΔIL by varying G2. The variable gain elements DA1 and DA2 can achieve the object by using a variable gain amplifier. However, when a multiplying digital-to-analog converter is used, the constant voltage setting value and the equivalent series resistance are independently and accurately set by digital signals. It is possible.
【０００６】この実施例では電子負荷装置の端子電圧、
基準電圧、電流検出電圧それぞれの電圧に任意の電圧係
数を掛けた例を説明したが、電圧を電流に変換し、それ
ぞれの電流の加算値がゼロとなるようにしても本発明を
実現でき、この場合はＲ１、Ｒ２、Ｒ３を省略すること
ができる。In this embodiment, the terminal voltage of the electronic load device is
Although an example in which each voltage of the reference voltage and the current detection voltage is multiplied by an arbitrary voltage coefficient has been described, the present invention can be realized even if the voltage is converted to a current and the sum of the respective currents becomes zero. In this case, R1, R2, and R3 can be omitted.
【０００７】[0007]
【発明の効果】本発明によると定電圧設定値と等価直列
抵抗の値をそれぞれ独立に、しかも正確に設定でき、蓄
電池の特性などを正確にシミュレーションすることが可
能となって、電子負荷装置の応用範囲を広げることがで
きる。さらに、この電子負荷装置と直流電源装置を直列
に組み合わせて電池と等価な特性を得ることもでき、Ｄ
Ａ１、ＤＡ２の値をそのままコンピユータから与えた
り、電圧や電流、時間などのパラメータでＤＡ１、ＤＡ
２の値を変化させて複雑な電圧電流特性を得ることが可
能となり、多用途のシミュレータとして利用することが
できる。According to the present invention, the set value of the constant voltage and the value of the equivalent series resistance can be set independently and accurately, and the characteristics of the storage battery can be accurately simulated. The range of application can be expanded. Furthermore, by combining the electronic load device and the DC power supply device in series, it is possible to obtain characteristics equivalent to a battery.
The values of A1 and DA2 are directly given from a computer, or the values of DA1, DA2 are set by parameters such as voltage, current, and time.
By changing the value of 2, it is possible to obtain complicated voltage-current characteristics, and it can be used as a versatile simulator.
【図１】本発明による電子負荷装置の原理図である。FIG. 1 is a principle diagram of an electronic load device according to the present invention.
【図２】本発明による電子負荷装置の電圧・電流特性で
ある。FIG. 2 shows a voltage-current characteristic of the electronic load device according to the present invention.
【図３】本発明による電子負荷装置の等価回路である。FIG. 3 is an equivalent circuit of the electronic load device according to the present invention.
【図４】本発明の具体的実施例である。FIG. 4 is a specific embodiment of the present invention.
【数１】 (Equation 1)
【数２】 (Equation 2)
【数３】 (Equation 3)
【数４】 (Equation 4)
【数５】 (Equation 5)
【数６】 (Equation 6)
【数７】 (Equation 7)
【数８】 (Equation 8)
【数９】 (Equation 9)
【数１０】 (Equation 10)
Claims (1)
に負荷電流に比例した電圧の３種類の電圧をそれぞれ独
立した比例係数を与えた電圧に変換し、それぞれの電圧
に比例した電流を増幅器の入力に加え、この増幅器の出
力電流を負荷電流とすると同時に増幅器の入力電流の総
和がゼロとなるように制御した電子負荷装置において、
基準電圧に対する比例係数と出力電流に比例した電圧に
対する比例係数のそれぞれを任意に設定し、定電圧特性
と等価直列抵抗特性を独立に制御可能とした電子負荷装
置。1. An electronic load device comprising: a terminal voltage, a reference voltage, and a voltage proportional to a load current, each of which is converted into a voltage having an independent proportional coefficient, and a current proportional to each voltage is converted into a voltage of an amplifier. In an electronic load device in which the output current of this amplifier is used as a load current in addition to the input, and the sum of the input currents of the amplifier is controlled to be zero,
An electronic load device in which a proportional coefficient with respect to a reference voltage and a proportional coefficient with respect to a voltage proportional to an output current are arbitrarily set, and a constant voltage characteristic and an equivalent series resistance characteristic can be independently controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15965494A JP2844423B2 (en) | 1994-06-20 | 1994-06-20 | Electronic load device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15965494A JP2844423B2 (en) | 1994-06-20 | 1994-06-20 | Electronic load device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH086652A JPH086652A (en) | 1996-01-12 |
| JP2844423B2 true JP2844423B2 (en) | 1999-01-06 |
Family
ID=15698437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15965494A Expired - Fee Related JP2844423B2 (en) | 1994-06-20 | 1994-06-20 | Electronic load device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2844423B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5284885B2 (en) * | 2009-06-19 | 2013-09-11 | 富士通テレコムネットワークス株式会社 | Power supply device |
| TW201109696A (en) * | 2009-09-11 | 2011-03-16 | Chroma Ate Inc | Electronic load capable of simulating LED characteristics and simulation method of same |
| JP4653857B1 (en) * | 2009-10-15 | 2011-03-16 | 株式会社計測技術研究所 | Load device |
| JP5955432B1 (en) * | 2015-03-30 | 2016-07-20 | 菊水電子工業株式会社 | Electronic load device |
| CN111077932B (en) * | 2019-12-23 | 2022-02-25 | 中电科思仪科技(安徽)有限公司 | Satellite sailboard power supply array simulator and voltage clamping method thereof |
-
1994
- 1994-06-20 JP JP15965494A patent/JP2844423B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH086652A (en) | 1996-01-12 |
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