Single-tube insulated gate bipolar transistor (IGBT) inverter arc welding machine
An arc welding machine and inverter circuit technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of low load duration and efficiency, poor consistency of multi-tube correlation, and low utilization rate of switching tubes. , to achieve the effect of high load duration, convenient after-sales service and low cost
Inactive Publication Date: 2011-05-04
上海瑞凌电器有限公司
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Problems solved by technology
[0006] (1) The frequency is too high, the requirements for various devices are high, and they are susceptible to interference; (2) The switch tube is resistive when it is turned on, the greater the current, the greater the heat, the heat cannot be dissipated, and the utilization rate of the switch tube is too low , multi-pipe association is required, and due to the poor consistency of multi-pipe association, it needs to be selected; (3) The load duration and efficiency are both low
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Embodiment 1
[0028] see figure 1 , The invention discloses a single-tube IGBT inverter arc welding machine, the arc welding machine includes a main circuit and a control circuit.
[0029] Such as figure 1 As shown, the main circuit includes an input switch, an input rectification and filtering circuit PCB1, an inverter circuit PCB2, a main transformer T2, and an output rectification and filtering circuit PCB3. The main circuit rectifies and filters the 50HZ mains to form a high-voltage DC, and then through the inverter circuit, it becomes a high-frequency square-wave AC. After passing through the main transformer T2, it is rectified and filtered by the secondary to become a DC current source for welding. The control circuit and control power supply are powered by the control transformer T1 power frequency transformer. The current feedback is completed by transformer T3, and the voltage feedback is shown in the figure. The PWM board PCB5 is installed on PCB6 with pin headers.
[0030] T...
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The invention discloses a single-tube insulated gate bipolar transistor (IGBT) inverter arc welding machine, which comprises a main circuit module and a control circuit module, wherein the main circuit module comprises an input switch, an input rectifier filter circuit, an inverter circuit, a main transformer T2 and an output rectifier filter circuit; the input rectifier filter circuit performs rectification filtration on current to obtain DC voltage which is inverted into high-frequency square wave alternating current by the inverter circuit, and the high-frequency square wave alternating current is converted into a DC current source for welding after sequentially passing through the main transformer T2 and the output rectifier filter circuit; and the control circuit module comprises a single-tube IGBT driving circuit, a pulse-width modulation adjustment circuit, a control circuit and a power supply. The inverter arc welding machine provided by the invention has high reliability, a small volume, high efficiency, a large load duration factor, low cost and low maintenance cost.
Description
technical field [0001] The invention belongs to the field of electromechanical technology, and relates to an arc welding machine, in particular to a single-tube IGBT inverter arc welding machine. Background technique [0002] There are two main types of existing inverter arc welding machines: the first type uses high-power IGBT modules for primary rectification, and fast recovery rectification modules for secondary rectification; the second type uses field effect tubes for primary rectification, and small package fast recovery diode. [0003] There are following deficiencies in the first kind of inverter arc welding machine: [0004] (1) The volume is large; (2) The heat dissipation cost is high, and a large-power fan and a large-area radiator are required; (3) The cost is too high, and the maintenance cost is high, because the IGBT and the fast recovery rectifier are modularized and cannot be damaged. repair. [0005] There are following deficiencies in the second kind o...
Claims
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Inventor 王小军成超
Owner 上海瑞凌电器有限公司