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公开(公告)号：US5771163A
公开(公告)日：1998-06-23
申请号：US752302
申请日：1996-11-19
CPC分类号： H02M3/285 , H02M3/33569 , H02M2001/0074
摘要： A DC power supply apparatus includes a rectifier circuit for rectifying an input AC voltage to develop a rectified voltage between two output terminals thereof. First and second smoothing capacitors are connected in series between the output terminals of the rectifier circuit. First and second voltages developed across the first and second capacitors are applied to first and second inverters which convert the applied voltages to high-frequency voltages, which, in turn, are applied to a transformer. The transformer develops a transformed high-frequency voltage which is converted to a DC voltage by a converter. A voltage detector detects the first and second voltages, and the detected first and second voltages are compared in a microprocessor. An inverter control circuit controls the first and second inverters in accordance with the result of comparison, in a sense to make the voltages across the first and second smoothing capacitors equal.
摘要翻译： 直流电源装置包括整流电路，用于整流输入AC电压，以在其两个输出端之间产生整流电压。 第一和第二平滑电容器串联连接在整流电路的输出端子之间。 跨越第一和第二电容器产生的第一和第二电压被施加到第一和第二逆变器，其将所施加的电压转换成高频电压，其又被施加到变压器。 变压器开发出转换后的高频电压，通过转换器转换为直流电压。 电压检测器检测第一和第二电压，并且在微处理器中比较所检测到的第一和第二电压。 在使得第一和第二平滑电容器两端的电压相等的意义上，逆变器控制电路根据比较结果来控制第一和第二逆变器。
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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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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：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：US06498320B2
公开(公告)日：2002-12-24
申请号：US09999023
申请日：2001-11-15
申请人： Haruo Moriguchi , Tetsuro Ikeda , Hideo Ishii
发明人： Haruo Moriguchi , Tetsuro Ikeda , Hideo Ishii
IPC分类号： B23K910
CPC分类号： B23K9/1056
摘要： One of commercial AC voltages is coupled to power supply terminals from one of commercial AC power supplies. The AC power supplies belong to either a first group providing higher voltages or a second group providing lower voltages. A rectifier rectifies the AC voltage applied to the power supply terminals, and a rectified voltage is developed between two rectifier output terminals. A switching unit operates to connect voltage-boosting converters selectively in series and in parallel between the rectifier output terminals. Inverters are connected in the output sides of and in association with the respective voltage-boosting converters for converting DC voltages from the associated voltage-boosting converters to high-frequency voltages. The high-frequency voltages are voltage-transformed by associated voltage-transformers, and the voltage-transformed high-frequency voltages are converted into a DC voltage by a rectifier circuit and a reactor. The DC voltage is developed between output terminals of the apparatus. A switching control unit controls the switching unit so as to connect the voltage-boosting converters in series between the rectifier output terminals when a commercial AC power supply of the first group is connected to the power supply terminals, while connecting the voltage-boosting converters in parallel between the rectifier output terminals when a commercial AC power supply of the second group is connected to the power supply terminals.
摘要翻译： 商用交流电压之一与商用交流电源之一的电源端子耦合。 交流电源属于提供较高电压的第一组或提供较低电压的第二组。 整流器对施加到电源端子的交流电压进行整流，并在两个整流器输出端子之间产生整流电压。 开关单元用于将升压转换器选择性地串联并联在整流器输出端子之间。 逆变器连接在相应的升压转换器的输出侧并与之相关联，用于将来自相关升压转换器的直流电压转换成高频电压。 高压电压由相关的电压互感器进行电压转换，并且通过整流电路和电抗器将电压变换的高频电压转换成直流电压。 在设备的输出端之间产生直流电压。 开关控制单元控制开关单元，以将第一组的商用AC电源连接到电源端子时将整流器输出端子之间的升压转换器串联连接，同时将升压转换器 当第二组的商用交流电源连接到电源端子时，整流器输出端子之间并联。
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公开(公告)号：US06278080B1
公开(公告)日：2001-08-21
申请号：US09440053
申请日：1999-11-18
申请人： Haruo Moriguchi , Tetsuro Ikeda , Atsushi Kinoshita , Hideo Ishii
发明人： Haruo Moriguchi , Tetsuro Ikeda , Atsushi Kinoshita , Hideo Ishii
IPC分类号： B23K910
CPC分类号： H05K7/20209 , B23K9/1056 , H02M1/36 , H02M3/3376 , H02M2001/008
摘要： A power supply apparatus includes a power supply unit disposed within a casing. The power supply unit includes power semiconductor devices. A fan is provided in the casing for cooling the power semiconductor devices. The power supply unit is operated in a plurality of contiguous cycles each including a running and pausing modes of operation. Each cycle lasting a relatively short time period. The power supply unit operates in the running mode and the pausing mode, respectively in response to the closing and opening of a start switch. In association with the closing and opening of the start switch, a switch for the cooling fan causes the fan to rotate and stop, respectively, which results in minimizing the difference between the highest and lowest temperatures of the power semiconductor devices so that the lifetime of the power semiconductor devices can be prolonged.
摘要翻译： 电源装置包括设置在壳体内的电源单元。 电源单元包括功率半导体器件。 壳体中设置有用于冷却功率半导体器件的风扇。 电源单元以多个连续周期操作，每个循环包括运行和暂停操作模式。 每个周期的持续时间相对较短。 电源单元响应于启动开关的闭合和打开而分别在运行模式和暂停模式下操作。 与启动开关的关闭和打开相关联，用于冷却风扇的开关分别使风扇旋转和停止，这导致功率半导体器件的最高和最低温度之间的差异最小化，使得寿命 可以延长功率半导体器件。
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公开(公告)号：US5272314A
公开(公告)日：1993-12-21
申请号：US991436
申请日：1992-12-16
申请人： Haruo Moriguchi , Tetsurou Ikeda , Kenzo Danjo , Masahiro Aoyama , Karino Kunio
发明人： Haruo Moriguchi , Tetsurou Ikeda , Kenzo Danjo , Masahiro Aoyama , Karino Kunio
CPC分类号： G05F1/08 , B23K9/0731 , B23K9/0956
摘要： A consumable electrode type d.c. arc welder including an invertor, which is arranged to rectify an a.c. power from a power supply, once convert a resultant d.c. power into a high frequency a.c. power by the invertor and again rectify it to obtain a d.c. power for welding, and provided with means for detecting a current flowing through its welding load to certainly discriminate shortening and arcing states between a welded base material and a welding electrode rod and controlling the invertor with a resultant discrimination signal to reduce its output voltage during the shortening period, thereby preventing spattering produced by an over-current.
摘要翻译： 消耗电极类型直流 电弧焊机包括一个逆变器，它被安排来纠正一个等 来自电源的电源，一旦转换成一个电源。 电力进入高频率a.c. 权力由逆变器再次纠正以获得直流。 并且具有用于检测流过其焊接负载的电流的装置，以确定地区分焊接的基底材料和焊接电极棒之间的起酥油状态和控制逆变器的结果，从而减小其在 缩短时间，从而防止由过电流产生的飞溅。
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公开(公告)号：US5942139A
公开(公告)日：1999-08-24
申请号：US009613
申请日：1998-01-20
CPC分类号： B23K9/1043 , B23K9/0956
摘要： DC power from a smoothing capacitor is converted into high frequency power by an inverter, and then lowered by an output transformer. The lowered high frequency power is converted into DC power by an output rectifier and a DC reactor, and then supplied to a load. The load is short-circuited and then opened to initiate arcing. The short-circuiting and the arcing alternate. An auxiliary rectifier provides a load-voltage representative signal, and a current detector detects a load current. A load-current representative signal is differentiated by a differentiation circuit. The signals from the auxiliary rectifier, the current detector and the differentiation circuit, and a reference signal are applied to an operational amplifier. A control circuit controls the inverter such that the output of the operational amplifier can be zero. An integration circuit receives at least the load-voltage representative signal to detect a period of a cycle consisting of the arcing and the short-circuiting and provide an operation-cycle-period representative signal to the operational amplifier.
摘要翻译： 来自平滑电容器的直流电力由逆变器转换为高频功率，然后由输出变压器降低。 降低的高频功率由输出整流器和直流电抗器转换为直流电力，然后提供给负载。 负载短路，然后打开以启动电弧。 短路和电弧交替。 辅助整流器提供负载电压代表信号，电流检测器检测负载电流。 负载电流代表信号由微分电路区分。 来自辅助整流器，电流检测器和微分电路的信号以及参考信号被施加到运算放大器。 控制电路控制逆变器，使得运算放大器的输出可以为零。 积分电路至少接收负载电压代表信号，以检测由电弧和短路组成的周期的周期，并向运算放大器提供操作周期代表信号。
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公开(公告)号：US5877952A
公开(公告)日：1999-03-02
申请号：US954816
申请日：1997-10-21
CPC分类号： B23K9/0678
摘要： Power supply apparatus includes a converter which converts a commercial AC voltage into a DC voltage. An inverter converts the DC voltage into a high frequency voltage. The high frequency voltage is voltage-transformed by a transformer, and then rectified and smoothed by a rectifier and a smoothing reactor into a DC voltage. This DC voltage is applied between a workpiece and a torch. A high frequency voltage generator generates a high frequency voltage and applies it to a primary winding of a coupling transformer. A boosted high frequency voltage is induced in a first secondary winding and applied between the workpiece and the torch, so that arcing is initiated. The coupling transformer includes a second secondary winding in which another high frequency voltage is induced. The high frequency voltage induced in the second secondary winding is converted into a DC voltage by a diode and a smoothing capacitor for application between the workpiece and the torch, so that the arcing is sustained.
摘要翻译： 电源装置包括将商用AC电压转换成DC电压的转换器。 逆变器将直流电压转换成高频电压。 高频电压由变压器进行电压转换，然后由整流器和平滑电抗器整流并平滑成直流电压。 该直流电压施加在工件和割炬之间。 高频电压发生器产生高频电压并将其施加到耦合变压器的初级绕组。 在第一次级绕组中感应出升高的高频电压，并施加在工件和割炬之间，从而启动电弧。 耦合变压器包括其中引入另一高频电压的第二次级绕组。 在第二次级绕组中感应的高频电压通过二极管和平滑电容器转换成直流电压，用于工件和焊炬之间的应用，从而保持电弧。
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