JP2526859B2 - Charge / discharge device - Google Patents
Charge / discharge deviceInfo
- Publication number
- JP2526859B2 JP2526859B2 JP60236691A JP23669185A JP2526859B2 JP 2526859 B2 JP2526859 B2 JP 2526859B2 JP 60236691 A JP60236691 A JP 60236691A JP 23669185 A JP23669185 A JP 23669185A JP 2526859 B2 JP2526859 B2 JP 2526859B2
- Authority
- JP
- Japan
- Prior art keywords
- charging
- circuit
- capacitor
- charge
- voltage
- 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)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明はコンデンサを用いた充放電装置に関し，例
えばコンデンサによる放電を溶接に用いるコンデンサ溶
接機などのコンデンサの容量抜けを改良するようにした
ものである。Description: TECHNICAL FIELD The present invention relates to a charging / discharging device using a capacitor, for example, a capacitor welding machine which uses discharge by the capacitor for welding to improve capacity loss of the capacitor. Is.
第５図は従来の例えばコンデンサ溶接機の構成を示す
回路図であり，図において（１）はコンデンサで，例え
ば電解コンデンサ，（２）はこの電解コンデンサ（１）
に充電するための充電制御回路，（３）は充電回路を開
閉するための充電用サイリスタ，（４）はコンデンサ
（１）からの放電回路を開閉するための放電用サイリス
タ，（５）は溶接トランス，（６）は加圧機，（７）は
溶接トランス（５）からの大電流で溶接される溶接物で
ある。FIG. 5 is a circuit diagram showing the structure of a conventional capacitor welding machine, for example, (1) is a capacitor, for example, an electrolytic capacitor, (2) is this electrolytic capacitor (1)
A charge control circuit for charging the battery, (3) a charging thyristor for opening and closing the charging circuit, (4) a discharging thyristor for opening and closing the discharging circuit from the capacitor (1), and (5) welding A transformer, (6) is a pressurizer, and (7) is a welded product welded with a large current from the welding transformer (5).
従来のコンデンサ溶接機は上記のように構成され，ま
ず充電用サイリスタ（３）が閉，放電用サイリスタ
（４）が開の状態で，充電制御回路（２）により充電回
路において電解コンデンサ（１）に充電する。電解コン
デンサ（１）が所定の電圧に達したら，充電用サイリス
タ（３）を開，放電用サイリスタ（４）を閉として放電
回路を構成し，溶接トランス（５）に通電する。溶接ト
ランス（５）の巻線比に応じて大電流が加圧機（６）を
通じて溶接物（７）に供給され，溶接物が接合される。The conventional capacitor welding machine is configured as described above. First, with the charging thyristor (3) closed and the discharging thyristor (4) open, the charging control circuit (2) causes the electrolytic capacitor (1) in the charging circuit. To charge. When the electrolytic capacitor (1) reaches a predetermined voltage, the charging thyristor (3) is opened and the discharging thyristor (4) is closed to form a discharging circuit, and the welding transformer (5) is energized. A large current is supplied to the welded product (7) through the pressurizer (6) according to the winding ratio of the welding transformer (5), and the welded products are joined.
上記のような従来のコンデンサ溶接機などの充放電装
置では，放電用コンデンサとして通常電解コンデンサを
使用している。この電解コンデンサは長期間の使用によ
り徐々に容量が低下することが知られている。コンデン
サに蓄えられる電荷をＱ（クーロン），コンデンサ容量
をＣ（ファラッド），充電電圧をＶ（ボルト）とすると
Ｑ＝VCとなる。また，放電電流は電荷Ｑに比例するた
め，コンデンサ容量が低下すると電荷Ｑが低下し，放電
電流も低下することになり，コンデンサ溶接機の場合に
は溶接品質が劣化するという問題点があった。In the above-mentioned charging / discharging device such as the conventional capacitor welding machine, an electrolytic capacitor is usually used as the discharging capacitor. It is known that this electrolytic capacitor gradually decreases in capacity with long-term use. If the charge stored in the capacitor is Q (coulomb), the capacitor capacity is C (farad), and the charging voltage is V (volt), then Q = VC. Further, since the discharge current is proportional to the charge Q, if the capacitor capacity decreases, the charge Q also decreases, and the discharge current also decreases, so that there is a problem that the welding quality deteriorates in the case of a capacitor welding machine. .
この発明はこの問題点を解決するためになされたもの
で，コンデンサの容量が低下しても放電電流の低下を防
ぎ，常に一定の放電電流となる充放電装置を得ることを
目的とする。The present invention has been made to solve this problem, and an object of the present invention is to provide a charging / discharging device in which the discharge current is prevented from decreasing even when the capacity of the capacitor decreases and the discharge current is always constant.
この発明に係る充放電装置は，充電回路の充電電流を
検出する充電電流検出器，この検出器により検出された
充電電流を時間積分する積分回路，この積分回路による
積分値と基準値を比較する比較回路，及びこの比較回路
における比較値によって充電回路の充電電圧を補正する
充電電圧補正回路を備えたものである。A charging / discharging device according to the present invention, a charging current detector for detecting a charging current of a charging circuit, an integrating circuit for time-integrating the charging current detected by the detector, and an integrated value by the integrating circuit and a reference value are compared. A comparison circuit and a charging voltage correction circuit for correcting the charging voltage of the charging circuit according to the comparison value in the comparison circuit are provided.
この発明における充電電流検出器，積分回路，及び比
較回路は，コンデンサの容量の減少を検出し，その減少
に応じて，充電電圧補正回路によりコンデンサの充電電
圧を増加するように補正するので，長期間にわたって一
定の放電電流が得られる。The charging current detector, the integrating circuit, and the comparing circuit according to the present invention detect a decrease in the capacity of the capacitor and, in accordance with the decrease, correct the charging voltage of the capacitor so as to increase the charging voltage of the capacitor. A constant discharge current is obtained over a period of time.
第１図はこの発明の一実施例による充放電装置として
コンデンサ溶接機を例として示す回路図であり，（１）
〜（７）は上記従来装置と全く同一のものである。
（８）は充電回路の一部に設けられた充電電流検出器，
（９）は充電電流検出器（８）で検出された充電電流を
時間積分するための積分回路で，例えば積分器，（10）
は積分器（９）で求められた積分値（電荷量）（Ｑ）を
基準値（基準電荷量）と比較するための比較回路で，例
えば比較器，（11）は比較器（10）の比較値に応じて充
電電圧を補正するための充電電圧補正回路である。FIG. 1 is a circuit diagram showing a capacitor welding machine as an example of a charging / discharging device according to an embodiment of the present invention.
(7) are exactly the same as the above conventional device.
(8) is a charging current detector provided in a part of the charging circuit,
(9) is an integrating circuit for time-integrating the charging current detected by the charging current detector (8), for example, an integrator, (10)
Is a comparison circuit for comparing the integrated value (charge amount) (Q) obtained by the integrator (9) with the reference value (reference charge amount). For example, the comparator, (11) is the comparator (10). It is a charging voltage correction circuit for correcting the charging voltage according to the comparison value.
第２図は充電制御回路（２）による充電時の電源電圧
で，横軸に時間（Ｔ），縦軸に電圧（Ｖ）を示す。第３
図はコンデンサ（１）での充電電流で，横軸に時間
（Ｔ），縦軸に電流（Ｉ）を示す。第４図はコンデンサ
（１）に蓄えられた電荷で，横軸に時間（Ｔ），縦軸に
電荷（Ｑ）を示す。FIG. 2 shows the power supply voltage at the time of charging by the charge control circuit (2), where the horizontal axis shows time (T) and the vertical axis shows voltage (V). Third
The figure shows the charging current in the capacitor (1), the horizontal axis shows time (T), and the vertical axis shows current (I). FIG. 4 shows the electric charge stored in the capacitor (1), where the horizontal axis shows time (T) and the vertical axis shows electric charge (Q).
充電電流検出器（８）は，第３図に示す充電回路にお
ける充電電流を検出し，この検出された値を積分回路
（９）に入力する。コンデンサ（１）に蓄えられる電荷
Q1（クーロン）は Q1＝∫t 0Idt（I:充電電流（アンペア）,t:充電時間
（秒）） となるので，積分回路（９）で充電電流を時間積分すれ
ば，第４図に示すようなコンデンサ（１）に蓄えられた
電荷Q1を知ることになる。この時，コンデンサ（１）に
容量抜けが生じて，電荷Q2が測定されると，これを比較
器（10）によって基準値QAと比較することにより検出
し，比較値QA-Q2に見合う分だけ充電電圧補正回路（1
1）によって充電電圧を増加し，コンデンサ（１）に蓄
えられる電荷を増加する。従って，常に一定の放電電流
が得られることになる。The charging current detector (8) detects the charging current in the charging circuit shown in FIG. 3 and inputs the detected value to the integrating circuit (9). Electric charge stored in the capacitor (1)
Since Q 1 (coulomb) is Q 1 = ∫ t 0 Idt (I: charging current (ampere), t: charging time (second)), if the charging current is integrated by the integrating circuit (9), The charge Q 1 stored in the capacitor (1) as shown in the figure will be known. At this time, when the capacitor (1) loses its capacity and the charge Q 2 is measured, this is detected by comparing this with the reference value Q A by the comparator (10), and the comparison value Q A -Q 2 Charge voltage correction circuit (1
The charge voltage is increased by 1) and the charge stored in the capacitor (1) is increased. Therefore, a constant discharge current can always be obtained.
さらに，充電電圧補正回路（11）に，補正電圧が充電
回路の初期設定電圧の10％を越えた場合に充電回路を停
止する回路を設けることにより，コンデンサ（１）の過
充電を防止することができる。Furthermore, the charging voltage correction circuit (11) is provided with a circuit that stops the charging circuit when the correction voltage exceeds 10% of the initial setting voltage of the charging circuit, thereby preventing overcharging of the capacitor (1). You can
また，上記実施例では，この発明をコンデンサ溶接機
に利用する場合について述べたが，これに限らず，その
他の充放電装置にも利用できることは言うまでもない。Further, in the above embodiment, the case where the present invention is applied to the capacitor welding machine has been described, but it is needless to say that the present invention can be applied to other charging / discharging devices as well.
以上のように、この発明によれば、充電回路よりコン
デンサに供給される充電電流を検出する充電電流検出器
と、その検出された充電電流を時間積分し上記コンデン
サに供給される電荷量を算出する積分回路と、その算出
された電荷量と基準電荷量とを比較する比較回路と、そ
の比較値に応じて上記充電回路の充電電圧を補正する充
電電圧補正回路とを備えるように構成したので、コンデ
ンサ容量が変化しても、充電回路の補正によりコンデン
サに蓄積される電荷量を一定にすることができ、したが
って、コンデンサ容量が変化しても、放電電流を一定に
することができる効果がある。As described above, according to the present invention, the charging current detector that detects the charging current supplied to the capacitor from the charging circuit, and the detected charging current are integrated over time to calculate the amount of charge supplied to the capacitor. Since it is configured to include an integrating circuit, a comparison circuit that compares the calculated charge amount with the reference charge amount, and a charging voltage correction circuit that corrects the charging voltage of the charging circuit according to the comparison value. , Even if the capacitance of the capacitor changes, the amount of electric charge accumulated in the capacitor can be made constant by the correction of the charging circuit. Therefore, even if the capacitance of the capacitor changes, the discharge current can be made constant. is there.
第１図はこの発明の一実施例による充放電装置を示す回
路図，第２図は時間に対する電源電圧を示す波形図，第
３図は時間に対する充電電流を示す波形図，第４図は時
間に対するコンデンサの電荷を示す波形図，第５図は従
来の充放電装置を示す回路図である。 （１）……コンデンサ，（８）……充電電流検出器，
（９）……積分回路，（10）……比較回路，（11）……
充電電圧補正回路。 なお，図中，同一符号は同一，又は相当部分を示す。FIG. 1 is a circuit diagram showing a charging / discharging device according to an embodiment of the present invention, FIG. 2 is a waveform diagram showing power supply voltage with respect to time, FIG. 3 is a waveform diagram showing charging current with respect to time, and FIG. 5 is a waveform diagram showing the electric charge of the capacitor with respect to FIG. 5, and FIG. 5 is a circuit diagram showing a conventional charging / discharging device. (1) …… Capacitor, (8) …… Charging current detector,
(9) …… Integrator circuit, (10) …… Comparison circuit, (11) ……
Charge voltage correction circuit. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (2)
コンデンサに接続された放電回路とを備え、上記充電回
路により上記コンデンサに蓄えられた電荷を上記放電回
路により放電する充放電装置において、上記充電回路よ
り上記コンデンサに供給される充電電流を検出する充電
電流検出器と、その充電電流検出器により検出された充
電電流を時間積分し上記コンデンサに供給される電荷量
を算出する積分回路と、その積分回路により算出された
電荷量と基準電荷量とを比較する比較回路と、その比較
回路の比較値に応じて上記充電回路の充電電圧を補正す
る充電電圧補正回路とを備えたことを特徴とする充放電
装置。1. A charging / discharging device comprising: a charging circuit connected to a capacitor; and a discharging circuit connected to the capacitor, wherein the electric charge stored in the capacitor by the charging circuit is discharged by the discharging circuit. A charging current detector that detects a charging current supplied to the capacitor from the charging circuit, and an integration circuit that integrates the charging current detected by the charging current detector with time to calculate the amount of charge supplied to the capacitor, A comparison circuit that compares the charge amount calculated by the integration circuit with a reference charge amount, and a charging voltage correction circuit that corrects the charging voltage of the charging circuit according to the comparison value of the comparison circuit are provided. Charge and discharge device.
充電回路の初期設定電圧の10％を越えた時に充電回路を
停止する回路を有することを特徴とする特許請求の範囲
第１項記載の充放電装置。2. The charging voltage correction circuit has a circuit for stopping the charging circuit when the correction value of the charging voltage exceeds 10% of the initial setting voltage of the charging circuit. The charging / discharging device described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60236691A JP2526859B2 (en) | 1985-10-23 | 1985-10-23 | Charge / discharge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60236691A JP2526859B2 (en) | 1985-10-23 | 1985-10-23 | Charge / discharge device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6297017A JPS6297017A (en) | 1987-05-06 |
| JP2526859B2 true JP2526859B2 (en) | 1996-08-21 |
Family
ID=17004339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60236691A Expired - Fee Related JP2526859B2 (en) | 1985-10-23 | 1985-10-23 | Charge / discharge device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2526859B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120064627A (en) | 2010-12-09 | 2012-06-19 | 가부시키가이샤 어드밴티스트 | Power supply apparatus and method of controlling the same, and test apparatus using the apparatus and the method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4215957Y1 (en) * | 1964-06-06 | 1967-09-13 |
-
1985
- 1985-10-23 JP JP60236691A patent/JP2526859B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120064627A (en) | 2010-12-09 | 2012-06-19 | 가부시키가이샤 어드밴티스트 | Power supply apparatus and method of controlling the same, and test apparatus using the apparatus and the method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6297017A (en) | 1987-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |