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    • 1. 发明专利
    • Arc welding power supply device
    • 电弧焊接电源装置
    • JP2014091139A
    • 2014-05-19
    • JP2012241892
    • 2012-11-01
    • Daihen Corp株式会社ダイヘン
    • MIZUSHIMA HIKARUHOU SONG JIEINOUE MASAHIROYOSHIDA KAZUKIMANABE AKIHIKO
    • B23K9/073H02M7/48H02M7/797
    • PROBLEM TO BE SOLVED: To provide an arc welding power supply device that can simply improve arc start properties by revising control in the starting of arc.SOLUTION: In an auxiliary circuit 13 of the pre-stage of an inverter circuit 14, the electric power charged in an auxiliary capacitor C3 is used in the case of soft switch operation in which switching elements TR5 and TR8 are turned off prior to switching elements TR1-TR4, and the charge of the auxiliary capacitor C3 is carried out by a return current generated after turning off the switching elements TR1-TR4. Usually in an arc control, a regenerative operation is carried out, the operation in which corresponding switching elements TR6 and TR7 are turned on and an excess portion of the return current for charging the auxiliary capacitor C3 is regenerated from smoothing capacitors C1 and C2 to an input side. Alternatively, in an arc start control, the switching elements TR6 and TR7 are fixed to an off-state to inhibit the regenerative operation, and the auxiliary capacitor C3 is charged by the return current containing the excess portion to thereby increase a charging voltage.
    • 要解决的问题:提供一种电弧焊供电装置,其可以通过修改开始时的控制来简单地提高电弧启动特性。解决方案:在逆变器电路14的前级的辅助电路13中,电力 在开关元件TR1〜TR4切换开关元件TR5,TR8的软开关动作的情况下,使用辅助电容器C3充电,辅助电容器C3的充电通过在 关闭开关元件TR1-TR4。 通常在电弧控制中,进行再生动作,使相应的开关元件TR6和TR7导通的操作,以及用于对辅助电容器C3充电的返回电流的过剩部分从平滑电容器C1和C2再生到 输入端。 或者,在电弧启动控制中,开关元件TR6和TR7固定为截止状态以禁止再生操作,并且通过包含多余部分的返回电流对辅助电容器C3进行充电,从而增加充电电压。
    • 3. 发明专利
    • Welding power supply device
    • 焊接电源装置
    • JP2014110710A
    • 2014-06-12
    • JP2012264832
    • 2012-12-04
    • Daihen Corp株式会社ダイヘン
    • MIZUSHIMA HIKARUHOU SONG JIEINOUE MASAHIROYOSHIDA KAZUKI
    • H02M3/28B23K9/067
    • PROBLEM TO BE SOLVED: To solve a problem that, in the conventional welding power supply device, although a bleeder resistor is provided between output terminals and applied with a current to stabilize an output voltage, a no-load voltage is reduced, which causes deterioration in start performance of arcs.SOLUTION: A welding power supply device comprises: a power supply main circuit having positive and negative terminals; a main control circuit; a DC reactor connected in series to the positive terminal; a charging switching element to which the DC reactor is connected at an output side; a charge and discharge capacitor; a discharge diode connected to the charge and discharge capacitor; and a bleeder resistor connected between output terminals. In the welding power supply device, a no-load switch connected in series to the bleeder resistor is provided. Upon receipt of a welding start signal, the no-load switch is shut off to make the power supply main circuit start outputting and to start feeding a welding wire, and simultaneously, the charging switching element is made electroconductive to charge the charge and discharge capacitor. After a lapse of a predetermined shut-off time period in which the charging of the charge and discharge capacitor is completed, the no-load switch is made electroconductive.
    • 要解决的问题为了解决现有的焊接电源装置中的输出端子之间设置放电电阻并施加电流以稳定输出电压的问题,空载电压降低,导致劣化 电弧启动性能。解决方案:焊接电源装置包括:具有正极和负极端子的电源主电路; 主控电路; 与正极串联连接的直流电抗器; 在输出侧连接有直流电抗器的充电开关元件; 充放电电容器; 连接到充放电电容器的放电二极管; 连接在输出端子之间的泄放电阻器。 在焊接电源装置中,提供与泄放电阻串联连接的空载开关。 在接收到焊接启动信号时,关闭空载开关以使电源主电路开始输出并开始馈送焊丝,同时使充电开关元件导电以对充放电电容器 。 在完成了充放电电容器的充电的预定关断时间段之后,空载开关被导通。