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公开(公告)号：US5926381A
公开(公告)日：1999-07-20
申请号：US159485
申请日：1998-09-23
申请人： Haruo Moriguchi , Toru Arai , Toshikazu Fujiyoshi , Masayuki Ono , Satoshi Hamada , Hideo Ishii
发明人： Haruo Moriguchi , Toru Arai , Toshikazu Fujiyoshi , Masayuki Ono , Satoshi Hamada , Hideo Ishii
IPC分类号： H02M3/28 , H02M3/335 , H02M7/25 , H02M7/5387
CPC分类号： H02M7/5387 , H02M7/25
摘要： A DC power supply apparatus includes an input-side rectifier which rectifies an input AC voltage and supplies the rectified voltage to a voltage-boosting converter. The voltage-boosting converter converts the supplied voltage to a voltage of a predetermined magnitude. The predetermined magnitude voltage is, then, converted to a high-frequency voltage by an inverter and applied to a primary winding of a transformer. An output-side rectifier rectifies a high-frequency voltage induced in a secondary winding of the transformer. The inverter includes IGBTs and diodes, which are connected in a full-bridge configuration. A capacitor is connected in parallel with each IGBT. When the IGBTs are rendered conductive by the charging and discharging of the capacitors, no current flows through the IGBTs, and when the IGBTs are rendered nonconductive, the voltages applied to the IGBTs are made to become zero.
摘要翻译： 直流电源装置包括输入侧整流器，其对输入的交流电压进行整流，并将整流的电压提供给升压转换器。 升压转换器将所提供的电压转换成预定大小的电压。 然后，通过逆变器将预定的幅度电压转换成高频电压并施加到变压器的初级绕组。 输出侧整流器对变压器次级绕组感应的高频电压进行整流。 逆变器包括以全桥配置连接的IGBT和二极管。 电容器与每个IGBT并联连接。 当通过电容器的充放电导致IGBT导通时，IGBT中不会流过电流，当IGBT变为不导通时，施加于IGBT的电压为零。
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公开(公告)号：US5930122A
公开(公告)日：1999-07-27
申请号：US152017
申请日：1998-09-11
申请人： Haruo Moriguchi , Toru Arai , Toshikazu Fujiyoshi , Masayuki Ono , Satoshi Hamada , Hideo Ishii
发明人： Haruo Moriguchi , Toru Arai , Toshikazu Fujiyoshi , Masayuki Ono , Satoshi Hamada , Hideo Ishii
CPC分类号： H02M3/285 , H02M1/10 , H02M3/33569 , H02M2001/0074
摘要： An inverter includes a series circuit of two current conducting units connected between two input terminals adapted to be connected to a DC power supply. Two first capacitors are connected in series between the two input terminals. A primary winding of a transformer is connected between the junction of the current conducting units and the junction of the first capacitors. Each of the current conducting units includes a parallel circuit of an IGBT, a diode and a second capacitor. The IGBT has a collector, an emitter and a gate and is rendered conductive when a control signal is applied to the gate while a voltage of a predetermined polarity is applied between the collector and the emitter. The diode is connected in inverse parallel with the IGBT. An inverter control circuit applies alternately the control signals to the respective IGBTs with a predetermined quiescent period disposed between the respective control signals applied.
摘要翻译： 逆变器包括连接在适于连接到直流电源的两个输入端之间的两个导电单元的串联电路。 两个第一电容器串联连接在两个输入端子之间。 变压器的初级绕组连接在电流传导单元的接头和第一电容器的接点之间。 每个电流传导单元包括IGBT，二极管和第二电容器的并联电路。 IGBT具有集电极，发射极和栅极，并且当在集电极和发射极之间施加预定极性的电压时，控制信号施加到栅极时导通。 二极管与IGBT反向并联连接。 逆变器控制电路将控制信号交替地施加到各个IGBT，其中预定的静态周期设置在施加的各个控制信号之间。
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公开(公告)号：US06069811A
公开(公告)日：2000-05-30
申请号：US212159
申请日：1998-12-15
申请人： Haruo Moriguchi , Toru Arai , Tetsuro Ikeda , Toshikazu Fujiyoshi , Masayuki Ono , Hideo Ishii
发明人： Haruo Moriguchi , Toru Arai , Tetsuro Ikeda , Toshikazu Fujiyoshi , Masayuki Ono , Hideo Ishii
IPC分类号： B23K9/073 , H02H7/125 , H02H9/00 , H02M1/08 , H02M3/155 , H02M3/28 , H02M3/337 , H02M7/12 , H02M7/217 , H02M1/10
CPC分类号： H02M1/4225 , H02H7/1257 , H02M3/337 , H02H9/001 , H02M1/32 , H02M1/36
摘要： A DC power supply apparatus includes a rectifier circuit which rectifies an input commercial AC voltage. The rectifier output voltage is smoothed in a smoothing capacitor. The DC voltage from the capacitor is converted to a high-frequency voltage in an inverter. The high-frequency voltage from the inverter is voltage-transformed by a transformer into a voltage-transformed, high-frequency voltage, which is then converted back into a DC voltage in a high-frequency-to-DC converter circuit. When an input commercial AC voltage is applied to the DC power supply apparatus, a pre-charging circuit pre-charges the smoothing capacitor from the input AC voltage. If a voltage having a magnitude larger than a prescribed value is applied to the DC power supply apparatus, an overvoltage protection circuit renders the rectifier circuit and the pre-charging circuit inoperative.
摘要翻译： 直流电源装置包括整流电路，其对输入的商用交流电压进行整流。 整流器输出电压在平滑电容器中平滑化。 来自电容器的直流电压在逆变器中转换成高频电压。 来自变频器的高频电压由变压器电压转换为电压变换的高频电压，然后将其转换回高频至直流转换电路中的直流电压。 当输入商用交流电压被施加到直流电源装置时，预充电电路从输入的交流电压对平滑电容器进行预充电。 如果将具有大于规定值的电压的电压施加到直流电源装置，则过电压保护电路使整流电路和预充电电路不起作用。
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公开(公告)号：US6054674A
公开(公告)日：2000-04-25
申请号：US231892
申请日：1999-01-14
申请人： Haruo Moriguchi , Tetsuro Ikeda , Toshikazu Fujiyoshi , Kenzo Danjo , Kunio Karino , Hideo Ishii
发明人： Haruo Moriguchi , Tetsuro Ikeda , Toshikazu Fujiyoshi , Kenzo Danjo , Kunio Karino , Hideo Ishii
CPC分类号： B23K9/1043
摘要： An AC voltage applied among power input supply terminals is rectified by a rectifier, and the rectified voltage is adapted to be reduced in a voltage-reducing converter with a switch connected in parallel with it. A switching circuit connect smoothing capacitors in series or parallel to the voltage-reducing converter. Inverters are connected in parallel with the respective smoothing capacitors. The output voltages of the inverters are voltage-transformed by transformers. The transformed voltages from the transformers are converted to DC voltages by converters. A control unit renders the voltage-reducing converter operative and causes the switching circuit to connect the smoothing capacitors in series when a third AC voltage is applied among the power supply input terminals. When a second AC voltage lower than the third AC voltage is applied among the power supply input terminals, the control unit causes the switch connected in parallel with the voltage-reducing converter to be closed and causes the switching circuit to connect the smoothing capacitors in series. If a first AC voltage about one-half as high as the second AC voltage is applied, the control unit causes the switch to be closed and causes the switching circuit to connect the smoothing capacitors in parallel.
摘要翻译： 电源输入电源端子之间施加的交流电压由整流器整流，并且整流后的电压适于在降压转换器中减少，开关与其并联连接。 开关电路将平滑电容器与降压转换器串联或并联连接。 逆变器与各个平滑电容器并联连接。 逆变器的输出电压由变压器进行电压转换。 变压器的变换电压通过转换器转换为直流电压。 当在电源输入端子之间施加第三交流电压时，控制单元使电压降低转换器工作并使开关电路串联连接平滑电容器。 当在电源输入端子之间施加低于第三交流电压的第二交流电压时，控制单元使与降压转换器并联的开关闭合，并使开关电路串联连接平滑电容器 。 如果施加大约为第二交流电压的一半的第一交流电压，则控制单元使开关闭合，并使开关电路并联连接平滑电容器。
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公开(公告)号：US5760372A
公开(公告)日：1998-06-02
申请号：US669993
申请日：1996-06-21
申请人： Kunio Karino , Haruo Moriguchi , Shigeru Okamoto , Kenzo Danjo , Atushi Kinoshita , Toshikazu Fujiyoshi
发明人： Kunio Karino , Haruo Moriguchi , Shigeru Okamoto , Kenzo Danjo , Atushi Kinoshita , Toshikazu Fujiyoshi
CPC分类号： B23K9/0956
摘要： An arc welder includes an inverter for converting a DC voltage to a RF voltage which, then, is rectified by a rectifier. The output of the rectifier is smoothed by a DC reactor. A RF generator provides RF current to flow between a workpiece and a main electrode of the welder forming a welder load, which initiates arcing between the workpiece and the main electrode. Initiation of arcing causes output current from the DC reactor to be supplied to the welder load, so that steady-state arcing is established. The DC reactor has a relatively small inductance which permit the output current from the DC reactor to reach a value required for establishing the steady-state arcing within a time period during which the RF generator provides RF current. The RF voltage from the inverter has a relatively high frequency so that the output current from the DC reactor can sustain the steady-state arcing.
摘要翻译： 电弧焊机包括用于将DC电压转换成RF电压的逆变器，然后由整流器整流。 整流器的输出由直流电抗器平滑。 RF发生器提供RF电流以在焊接工件的工件和主电极之间流动，形成焊接负载，其启动工件和主电极之间的电弧。 引起电弧会使直流电抗器的输出电流提供给焊机负载，从而建立稳态电弧。 DC电抗器具有相对小的电感，其允许来自DC电抗器的输出电流达到在RF发生器提供RF电流的时间段内建立稳态电弧所需的值。 来自逆变器的RF电压具有相对高的频率，使得来自DC电抗器的输出电流可以维持稳态电弧。
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公开(公告)号：US5457300A
公开(公告)日：1995-10-10
申请号：US285002
申请日：1994-08-02
CPC分类号： B23K9/0956
摘要： An inverter controlled DC arc welder of consumable electrode type includes an input rectifier for rectifying AC input power, an inverter for converting the rectifier output to high frequency AC power, an output transformer for stepping down the inverter output voltage, and an output rectifier for rectifying the transformer output voltage to provide a DC output voltage to be applied to a welder load. The welder further includes means for detecting current flowing through the welder load to produce a detection signal, a differentiator circuit for differentiating the detection signal, and correction means for correcting a predetermined reference voltage in accordance with the differentiator output voltage. Feedback control means controls the inverter in accordance with the difference between the transformer output and the corrected reference voltage.
摘要翻译： 一种易损电极类型的逆变器控制直流电弧焊机，包括用于整流交流输入电源的输入整流器，用于将整流器输出转换为高频交流电的逆变器，用于降低逆变器输出电压的输出变压器，以及用于整流的输出整流器 变压器输出电压提供要施加到焊机负载的直流输出电压。 焊机还包括用于检测流过焊机负载的电流以产生检测信号的装置，用于区分检测信号的微分电路和用于根据微分器输出电压校正预定参考电压的校正装置。 反馈控制装置根据变压器输出与校正参考电压之间的差异来控制变频器。
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公开(公告)号：US5272313A
公开(公告)日：1993-12-21
申请号：US962923
申请日：1992-10-19
申请人： Kunio Karino , Haruo Moriguchi , Toshikazu Fujiyoshi , Tetsurou Ikeda , Kenzo Danjo , Masahiro Aoyama
发明人： Kunio Karino , Haruo Moriguchi , Toshikazu Fujiyoshi , Tetsurou Ikeda , Kenzo Danjo , Masahiro Aoyama
CPC分类号： B23K9/1056 , H02H11/007
摘要： An arc welder which can be used with either a high voltage a.c. power supply of a certain voltage or a low voltage a.c. power supply of about a half of said voltage, such as 400 or 200 volts, for example, and which is provided with a circuit configuration in which an input a.c. voltage is rectified by a rectifier and smoothed by a pair of capacitors and the resultant d c. power is converted by an invertor into a high frequency a.c. power which is reduced in voltage by an output transformer and then rectified again, and arranged to discriminate the input a.c. voltage and switchingly connect these capacitors in series or parallel between both ends of the input rectifier, thereby automatically conforming the circuit to both high and low supply voltages.
摘要翻译： 一台电弧焊机，可以用于高压直流电。 电源一定电压或低电压a.c. 电源约为所述电压的一半，例如400或200伏，并且具有电路配置，其中输入交流电 电压由整流器整流并且被一对电容器平滑，并且得到d c。 电力由逆变器转换成高频率交流电。 功率由输出变压器降低电压，然后再次整流，并且被布置为区分输入交流电。 电压并将这些电容器以串联或并联的方式连接在输入整流器的两端之间，从而将电路自动地符合高电源电压和低电源电压。
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公开(公告)号：US5630952A
公开(公告)日：1997-05-20
申请号：US579254
申请日：1995-12-27
CPC分类号： H05H1/36
摘要： A plasma-arc power supply apparatus includes a main electrode terminal, a nozzle electrode terminal and a workpiece terminal which are respectively coupled to a main electrode, a nozzle electrode and a workpiece of a plasma-arc apparatus. A DC power supply has its first output terminal coupled to the main electrode terminal, and a second output terminal. A pilot arc path is coupled between the second output terminal and the nozzle electrode terminal. A switch is connected in the pilot arc path. A plasma-arc path is coupled between the second output terminal and the workpiece terminal. A current detector has its first input coupled to the plasma-arc path, has its second input coupled to the pilot arc path, and produce a detection signal corresponding to the values of pilot arc and plasma-arc currents in the pilot arc and and plasma-arc paths, respectively. When the pilot arc current is flowing, a control unit closes the switch and controls current from the DC power supply in accordance with the difference between detection signal and a predetermined pilot arc reference signal, and when the plasma-arc current is flowing, the control unit opens the switch and controls current from the DC power supply in accordance with the difference between the detection signal and a predetermined plasma-arc signal.
摘要翻译： 等离子弧电源装置包括主电极端子，喷嘴电极端子和工件端子，它们分别连接到等离子体电弧装置的主电极，喷嘴电极和工件。 直流电源具有与主电极端子耦合的第一输出端子和第二输出端子。 引弧步骤连接在第二输出端和喷嘴电极端之间。 开关连接在导电弧路径中。 等离子体电弧路径耦合在第二输出端子和工件端子之间。 电流检测器具有耦合到等离子体电弧路径的第一输入端，其第二输入端耦合到先导电弧路径，并且产生对应于导向电弧中的导电电弧和等离子体电弧电流值的检测信号和等离子体 -arc路径。 当导通电弧电流流动时，控制单元关闭开关并根据检测信号和预定的导频电弧参考信号之间的差异控制来自直流电源的电流，并且当等离子体电弧电流流动时，控制 单元打开开关并根据检测信号和预定的等离子体电弧信号之间的差异控制来自直流电源的电流。
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公开(公告)号：US5306894A
公开(公告)日：1994-04-26
申请号：US25775
申请日：1993-03-03
申请人： Haruo Moriguchi , Tetsurou Ikeda , Kenzo Danjo , Toshikazu Fujiyoshi , Masahiro Aoyama , Kunio Karino
发明人： Haruo Moriguchi , Tetsurou Ikeda , Kenzo Danjo , Toshikazu Fujiyoshi , Masahiro Aoyama , Kunio Karino
CPC分类号： B23K9/1056 , G05F1/08
摘要： An invertor controlled D.C. arc welder of consumable electrode type which is arranged to rectify an a.c. power from a commercial power supply, convert it into a high frequency a.c. power by an invertor, rectify it again to obtain a d.c. power output for welding and stabilize the output voltage by feedback control of the invertor based upon the output voltage and provided with means for discriminating shorting and arcing periods of its welding load from the output voltage and additionally controlling the invertor based upon a resultant discrimination signal to raise the output voltage during the early time of the arcing period, thereby preventing defective welding due to insufficient output current. This invention is especially, effective for supplementing such insufficient output current as an aftereffect of insufficient output power during the shortening period in such welder which is provided with means for reducing the output voltage during the shortening period to prevent generation of undesirable spattering.
摘要翻译： 一种易损电极类型的逆变器控制直流电弧焊机，其设置为对一个直流电源进行整流。 从商用电源供电，将其转换成高频率。 权力由逆变器，再次纠正获得一个d.c. 用于焊接的功率输出并且通过基于输出电压的逆变器的反馈控制来稳定输出电压，并且具有用于区分其焊接负载的短路和电弧周期与输出电压的装置，并且基于所得到的鉴别信号来控制逆变器 在电弧期的早期阶段提高输出电压，防止由于输出电流不足导致的焊接不良。 本发明特别有效地补充这种不足的输出电流，作为在这种焊接机的缩短期间输出功率不足的后果，其具有用于在缩短期间减小输出电压的装置，以防止产生不期望的飞溅。
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公开(公告)号：US5643475A
公开(公告)日：1997-07-01
申请号：US554657
申请日：1995-11-08
CPC分类号： B23K10/00
摘要： A power supply apparatus for a plasma arc cutter includes an inverter which converts DC power to high-frequency power. An output developing circuit rectifies and smooths the high-frequency power for application between a torch electrode and a workpiece which form together a plasma load. A current detecting unit detects current flowing through the plasma load. A reference signal generating unit generates a reference signal including a preset DC signal and a predetermined AC signal superposed on the DC signal. A control units control the inverter, in accordance with the difference between the output of the current detecting unit and the reference signal, so that the output current to be supplied between the electrode and the workpiece has a predetermined constant DC current and a predetermined AC current superposed on the DC current.The reference signal generating unit can vary the frequency and amplitude of the AC signal in the reference signal.
摘要翻译： 用于等离子体电弧刀的电源装置包括将直流电力转换为高频电力的逆变器。 输出显影电路整流和平滑用于焊接电极和工件之间的等离子体负载的高频功率。 电流检测单元检测流过等离子体负载的电流。 参考信号产生单元生成包括预置的DC信号和叠加在DC信号上的预定AC信号的参考信号。 控制单元根据电流检测单元的输出与参考信号的差异来控制逆变器，使得在电极和工件之间提供的输出电流具有预定的恒定直流电流和预定的交流电流 叠加在直流电流上。 参考信号生成单元可以改变参考信号中的AC信号的频率和幅度。
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