WO2004001940A1 - High-current power supply using storage battery - Google Patents

High-current power supply using storage battery Download PDF

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Publication number
WO2004001940A1
WO2004001940A1 PCT/JP2002/004972 JP0204972W WO2004001940A1 WO 2004001940 A1 WO2004001940 A1 WO 2004001940A1 JP 0204972 W JP0204972 W JP 0204972W WO 2004001940 A1 WO2004001940 A1 WO 2004001940A1
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
storage battery
high current
produced
transformer
Prior art date
Application number
PCT/JP2002/004972
Other languages
French (fr)
Japanese (ja)
Inventor
Toshikatsu Sonoda
Akio Wada
Original Assignee
Kinki University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP2002182183A priority Critical patent/JP2003116284A/en
Application filed by Kinki University filed Critical Kinki University
Priority to PCT/JP2002/004972 priority patent/WO2004001940A1/en
Publication of WO2004001940A1 publication Critical patent/WO2004001940A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Definitions

  • the present invention relates to a power supply device that obtains a higher current than the secondary voltage of a transformer by performing inverter control on a step-down transformer using a storage battery as a power supply.
  • a power supply device that obtains a higher current than the secondary voltage of a transformer by performing inverter control on a step-down transformer using a storage battery as a power supply.
  • a power supply device such as resistance welding uses a commercial power supply of 20 OV or more, and a large current is generated in the secondary winding by increasing the turns ratio of the step-down transformer.
  • the present invention made a prototype of a low-voltage, large-current resistance welding power supply device and carried out an experiment in order to embody the research that has been carried out so far.
  • the following findings were obtained.
  • a DC power supply that has been charged to a storage battery in advance, large-scale power receiving equipment is not required, and a commercial power supply ⁇ approximately 100 [V], 20 [ ⁇ ] ⁇ that is supplied to ordinary households in Japan is used. Enables resistance welding.
  • a step-down transformer by detecting the magnetic flux density of the transformer core and using a thyristor to switch the primary current between positive and negative alternately each time the value reaches a predetermined value, a step-down transformer It has been found that the magnetic flux density of the transformer is optimally controlled and that the transformer can be downsized.
  • FIG. 1 is a schematic illustration of a spot welding machine.
  • FIG. 2 is a block diagram of an example in which a step-down transformer is controlled by an inverter as a spot welding machine.
  • FIG. 3 shows welding current value data when welding was performed using a spot welding machine.
  • the voltage e S A induced in the search coil N sc h applied to the step-down transformer is integrated with respect to time, and the magnetic flux ⁇ of the magnetic core is detected as (i> det .) Then, ⁇ i> det is a preset ⁇ Every time the target value of ⁇ (i) ref is reached, the outputs VGP and VGn of the comparators C. mp and C. mn are obtained, and each of the thyristors Thl and Th2 is fired alternately. AC primary current flows through the primary winding.
  • the switching cycle automatically changes according to the load condition, and the magnetic flux density of the magnetic core is automatically controlled to reach the saturation value (the target value of magnetic flux) of the maximum magnetic flux density of the magnetic core. Is done.
  • the transformer can be downsized, its weight can be reduced, and the transformer can be made portable. Then, the primary current is switched between positive and negative alternately until the heat energy required for welding is obtained, and the welding current, which is the secondary current, is passed through the weld to complete a series of welding. See Fig. 2 Possibility of industrial use
  • the present invention does not require a special large-scale power receiving facility, and drives a transformer in the proposed manner with a storage battery, so that resistance welding can be performed using a commercial power source supplied to ordinary households. Is possible.
  • a transformer at the welding head, the cable required to connect the transformer and the welding part, which was required in the past, is unnecessary, making it portable.
  • enabling resistance welding with a small commercial power supply without the need for large-scale power receiving equipment makes it possible for small and medium-sized enterprises to easily perform resistance welding, contributing to the reduction of power equipment equipment costs that were originally required. .
  • it will reduce power demand, reduce the amount of power generated by power companies, and ultimately contribute to the global environment.

Abstract

A power supply for supplying a high current instantly by inverter-controlling a step-down transformer by using the energy stored in a storage battery. The power supply comprises, as shown in Fig. 1, an electric circuit unit for charging a storage battery, a step-down transformer and an inverter drive unit, an inverter control unit, and a welding head unit. When two steel sheets with a 1.0 mm thickness are welded by using the power supply, a high current of 10,000 to 25,000 A as shown in Figure 3 is produced. Such a high current can be produced by charging a storage battery with a home commercial power supply or a small generator without a large-scale power-receiving facility. A high current necessary for resistance welding can be produced by using at least a commercial power supply (100 [V], 20 [A]) (in Japan) supplied to a general home or a small generator without a large-scale power-receiving facility.

Description

明 細 書 蓄電池を用いた大電流電源装置 技術分野  Description High-current power supply device using storage battery
この発明は、 蓄電池を電源として降圧用変圧器をィンバータ制御することに より、 変圧器の 2次より大電流を得る電源装置に関すものであり、 この電源を 用いた抵抗溶接機と口ゥ付け機に関する。. 背景技術  The present invention relates to a power supply device that obtains a higher current than the secondary voltage of a transformer by performing inverter control on a step-down transformer using a storage battery as a power supply. About the machine. Background technology
従来、 抵抗溶接等の電源装置としては、 瞬時に大電流を必要とするため、 大 規模な受電設備を必要とした。 このために、 大きな受電設備を有しない小企業 や一般家庭では、 抵抗溶接電源装置を駆動することができなかった。 また、 大規 摸な受電設備を有する場所においても、 抵抗溶接電源装置を運転するには、 新た に大型の変圧器を設置しなければならない問題もあった。 また、 抵抗溶接電源に つなぐケープ も大きくしなければならなかった。  Conventionally, large-scale power receiving equipment was required because a power supply such as resistance welding required a large current instantaneously. For this reason, small businesses and ordinary households without large power receiving equipment could not drive the resistance welding power supply. There was also a problem that a large transformer had to be newly installed in order to operate the resistance welding power supply even in a place with a large power receiving facility. Also, the cape connected to the resistance welding power source had to be large.
つまり従来は、 抵抗溶接等の電源装置には、 2 0 OV以上の商用電源を用い、 降圧用変圧器の卷数比を大きくすることにより 2次巻線に大電流を発生させてい た。 この為に大規模の受電設備を必要とした。 従って、 受電設備を持たない中小 企業や一般家庭では、 抵抗溶接機等の大電流を必要とする電源装置の駆動は、 出 来なかった。 発明の開示  That is, conventionally, a power supply device such as resistance welding uses a commercial power supply of 20 OV or more, and a large current is generated in the secondary winding by increasing the turns ratio of the step-down transformer. This required large-scale power receiving equipment. Therefore, small and medium-sized enterprises and ordinary households without power receiving equipment have not been able to drive power devices that require large currents, such as resistance welding machines. Disclosure of the invention
本発明は、 背景技術で述べた課題を解決するため、 これまで続けて来た研究 を具体化するため、 低電圧大電流型の抵抗溶接電源装置を試作して実験した。 そ の結果、 次の知見を得た。 即ち、 予め蓄電池に充電した直流電源を用いることに より、 大規模な受電設備を不用とし、 日本の一般家庭に給電されている商用電源 { 100 [V], 20 [Α]程度 } を用いて抵抗溶接を可能とした。 つまり、 変圧器磁心の 磁束密度を検出し、その値が予め定めた大きさに達する毎にサイリスタにより一 次電流を正 ·負交互に切換える一種の自励ィンバータ方式とすることにより、 降 圧用変圧器の磁束密度が最適に制御され、 変圧器の小型化が可能であることを見 出した。  In order to solve the problems described in the background art, the present invention made a prototype of a low-voltage, large-current resistance welding power supply device and carried out an experiment in order to embody the research that has been carried out so far. As a result, the following findings were obtained. In other words, by using a DC power supply that has been charged to a storage battery in advance, large-scale power receiving equipment is not required, and a commercial power supply {approximately 100 [V], 20 [Α]} that is supplied to ordinary households in Japan is used. Enables resistance welding. In other words, by detecting the magnetic flux density of the transformer core and using a thyristor to switch the primary current between positive and negative alternately each time the value reaches a predetermined value, a step-down transformer It has been found that the magnetic flux density of the transformer is optimally controlled and that the transformer can be downsized.
なお、 インバータを構成する場合、 試作機で用いたサイリスタの代わりに半導 体スイッチング素子、 例えば IGBT, GTO,バイポーラトランジスタ， パワーモス FETを用いて構成することも出来る。 図面の簡単な説明 When configuring an inverter, it is also possible to use semiconductor switching elements, such as IGBTs, GTOs, bipolar transistors, and power MOS FETs, instead of the thyristors used in the prototype. BRIEF DESCRIPTION OF THE FIGURES
第 1図は、 スポット溶接機を略図して説明したものである。  FIG. 1 is a schematic illustration of a spot welding machine.
第 2図は、 スポット溶接機として降圧用変圧器をインバータ制御した例のプロ ック図である。  FIG. 2 is a block diagram of an example in which a step-down transformer is controlled by an inverter as a spot welding machine.
第 3図は、 スポット溶接機を用いて溶接した際の溶接電流値データである。  FIG. 3 shows welding current value data when welding was performed using a spot welding machine.
発明を実施するための最良の形態 BEST MODE FOR CARRYING OUT THE INVENTION
先ず、降圧変圧器に施した探りコイル Nschに誘起する電圧 eSA を時間積分 して磁心の磁束 φを (i> det として検出する。 次に、 <i> detが予め設定した Φの目 標値である ± (i) ref に達する毎にコンパレータ C。mp， C。mnの出力 VGP， VGnを得 てサイリスタ Thl, Th2 のそれぞれを交互に点弧して、 蓄電池より変圧器の一 次巻線に交流の一次電流を流す。 First, the voltage e S A induced in the search coil N sc h applied to the step-down transformer is integrated with respect to time, and the magnetic flux φ of the magnetic core is detected as (i> det .) Then, <i> det is a preset Φ Every time the target value of ± (i) ref is reached, the outputs VGP and VGn of the comparators C. mp and C. mn are obtained, and each of the thyristors Thl and Th2 is fired alternately. AC primary current flows through the primary winding.
磁心の磁束密度は、 正 ·負の定められたレベルに達する毎に正 ·負に切換え られることから、 二次側回路が軽負荷時には、 切換え周期が短くなり、 高い周 波数となり、 短絡すると低い周波数となる。 つまり、 切換え周期は、 負荷状態 に応じて自動的に変化し、 磁心の磁束密度は、 磁心の有する最大磁束密度の飽 和値（磁束の目標値）に達して動作するように自動的に制御される。その結果、 変圧器は、 小型化が可能となり、 その重量を軽減することができてポータブル 化が可能となる。 そして、 溶接に要する熱エネルギーが得られるまで一次電流 を正 ·負交互に切換え、 二次電流である溶接電流を溶接部に流して一連の溶接 を完了する。 第 2図参照 産業上の利用の可能性  Since the magnetic flux density of the magnetic core is switched between positive and negative each time it reaches the specified positive / negative level, when the secondary circuit is lightly loaded, the switching cycle is short, high frequency, and low when short-circuited Frequency. In other words, the switching cycle automatically changes according to the load condition, and the magnetic flux density of the magnetic core is automatically controlled to reach the saturation value (the target value of magnetic flux) of the maximum magnetic flux density of the magnetic core. Is done. As a result, the transformer can be downsized, its weight can be reduced, and the transformer can be made portable. Then, the primary current is switched between positive and negative alternately until the heat energy required for welding is obtained, and the welding current, which is the secondary current, is passed through the weld to complete a series of welding. See Fig. 2 Possibility of industrial use
上記のように本発明は、 特別な大規模な受電設備を必要とせず、 蓄電池と提 案する方式で変圧器を駆動することにより、 一般家庭に給電されている商用電 源を用いて抵抗溶接を可能とする。 更に、 溶接ヘッド部に変圧器を配置するこ とにより、 従来必要とした変圧器部と溶接部とをつなぐケーブルは不用となり、 ポータブル化を可能としている。 また、 大規模な受電設備を必要とせず小規模 の商用電源で抵抗溶接を可能とすることは、 中小企業でも簡単に抵抗溶接が可 能となり、 本来必要とした電源設備費の軽減に貢献する。 更には、 電力需要の 軽減化につながり、 電力会社の発電量を小さくし、 最後には、 地球環境にも貢 することになる。  As described above, the present invention does not require a special large-scale power receiving facility, and drives a transformer in the proposed manner with a storage battery, so that resistance welding can be performed using a commercial power source supplied to ordinary households. Is possible. In addition, by arranging a transformer at the welding head, the cable required to connect the transformer and the welding part, which was required in the past, is unnecessary, making it portable. In addition, enabling resistance welding with a small commercial power supply without the need for large-scale power receiving equipment makes it possible for small and medium-sized enterprises to easily perform resistance welding, contributing to the reduction of power equipment equipment costs that were originally required. . In addition, it will reduce power demand, reduce the amount of power generated by power companies, and ultimately contribute to the global environment.

Claims

請 求 の 範 囲 電池を電源として降圧用変圧器をィンバータ制御することにより、 2火 電流を得ることを特徴とする大電流電源装置 請求の範囲 1を利用した抵抗溶接機 請求の範囲 1を利用した口ゥ付け機  Scope of the request High-current power supply unit, which obtains 2 fire currents by controlling the step-down transformer using a battery as a power source, and a resistance welding machine using claim 1 Use claim 1 Squeezing machine
PCT/JP2002/004972 2001-05-21 2002-05-22 High-current power supply using storage battery WO2004001940A1 (en)

Priority Applications (2)

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JP2002182183A JP2003116284A (en) 2001-05-21 2002-05-20 High current power supply
PCT/JP2002/004972 WO2004001940A1 (en) 2001-05-21 2002-05-22 High-current power supply using storage battery

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JP2001192021 2001-05-21
JP2002182183A JP2003116284A (en) 2001-05-21 2002-05-20 High current power supply
PCT/JP2002/004972 WO2004001940A1 (en) 2001-05-21 2002-05-22 High-current power supply using storage battery

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101985187A (en) * 2010-09-19 2011-03-16 深圳市华意隆实业发展有限公司 Energy storage inverter type air plasma cutter for rescue emergencies
US8274560B2 (en) 2006-09-19 2012-09-25 Abb Research Ltd Flame detector for monitoring a flame during a combustion process

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6982398B2 (en) 2004-06-01 2006-01-03 Illinois Tool Works Inc. Fuel saving engine driven welding-type device and method of use
US8080761B2 (en) 2004-08-17 2011-12-20 Lincoln Global, Inc. Hybrid powered welder

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5549973A (en) * 1978-10-06 1980-04-11 Hitachi Ltd Converter power source device
JPH04305369A (en) * 1991-04-02 1992-10-28 Ryoda Sato Welding equipment, heating device and exciting device
JPH07123716A (en) * 1993-10-29 1995-05-12 Cosel Usa Inc Inverter circuit
EP0688626A1 (en) * 1994-05-27 1995-12-27 Kabushiki Kaisha Toshiba Control equipment for resistance welding machine
JPH08298787A (en) * 1995-04-24 1996-11-12 Nobuo Takumasu Stabilization circuit of parallel inverter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5549973A (en) * 1978-10-06 1980-04-11 Hitachi Ltd Converter power source device
JPH04305369A (en) * 1991-04-02 1992-10-28 Ryoda Sato Welding equipment, heating device and exciting device
JPH07123716A (en) * 1993-10-29 1995-05-12 Cosel Usa Inc Inverter circuit
EP0688626A1 (en) * 1994-05-27 1995-12-27 Kabushiki Kaisha Toshiba Control equipment for resistance welding machine
JPH08298787A (en) * 1995-04-24 1996-11-12 Nobuo Takumasu Stabilization circuit of parallel inverter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8274560B2 (en) 2006-09-19 2012-09-25 Abb Research Ltd Flame detector for monitoring a flame during a combustion process
CN101985187A (en) * 2010-09-19 2011-03-16 深圳市华意隆实业发展有限公司 Energy storage inverter type air plasma cutter for rescue emergencies

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