Device for realizing soft switching while welder no-load and light load for inverse welder
An inverter welding machine and soft switching technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of loss of duty cycle, large circulating current energy, increased switching loss and switching noise, etc. losses, increased switching noise, significantly improved effects
Active Publication Date: 2005-08-03
AOTAI ELECTRIC
View PDF0 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] At present, the soft-switching arc welding inverter mostly adopts the full-bridge inverter circuit, and the control method adopts the pulse width modulation (PWM). In the existing zero voltage switching pulse width modulation (ZVS-PWM), two Both bridge arms realize zero-voltage switching, but the zero-voltage condition of the lagging bridge arm is greatly affected by the load and input voltage. When the load is no-load or light-loaded, the zero-voltage switching condition will be lost, and there will be large circulating current energy, Problems such as loss of duty cycle increase switching loss and switching noise, which are the shortcomings of the existing technology
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0007] In order to clearly illustrate the technical features of the solution, the solution will be described below through a specific implementation.
[0008] It can be seen from the accompanying drawings that the inverter welding machine of this scheme is used to realize the soft switching device when the welding machine is no-load and light-loaded, mainly including high-power insulated gate bipolar transistors Q1 and Q3 as super forearms, high-power insulated gate Bipolar transistors Q2 and Q4 are the lagging arms, capacitors C1 and C3 are super forearm parallel capacitors, and capacitors C2 and C4 are full-bridge phase-shifting resonant circuits composed of lagging-arm parallel capacitors. Transformer T primary coil N1 output, high frequency transformer T secondary output coil N2 output inverter power supply, this scheme is in the secondary of high frequency transformer T there is a secondary auxiliary coil N3, the number of turns of secondary auxiliary coil N3 is the same a...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The soft switch device includes mainly one phase-shifting resonator bridge circuit including two leading arms with great power transistor and capacitor and two lagging arms with great power transistor and capacitor; one high frequency transformer as the output of the phase-shifting resonator bridge circuit; and one inverter power source connected to the secondary of the high frequency transformer. The present invention features that there is also one auxiliary winding N3 connected to one current converting inductor L in the secondary of the transformer. The current converting inductor L has U-shaped ferrite core and winding of 14-21 turns, and the auxiliary winding N3 has the same turns as the secondary output winding N2 or may be replaced directly with the secondary output winding N2.
Description
Technical field: [0001] The invention relates to a welding machine used for welding in industry, in particular to a soft switching device for an inverter welding machine to realize the welding machine's no-load and light-load conditions. Background technique: [0002] At present, the soft-switching arc welding inverter mostly adopts the full-bridge inverter circuit, and the control method adopts the pulse width modulation (PWM). In the existing zero voltage switching pulse width modulation (ZVS-PWM), the two Both the bridge arms realize zero-voltage switching, but the zero-voltage condition of the lagging bridge arm is greatly affected by the load and input voltage. When the load is no-load or light-loaded, the zero-voltage switching condition will be lost, and there will be large circulating current energy, Problems such as loss of duty cycle increase switching loss and switching noise, which is a deficiency in the prior art. Invention content: [0003] The purpose of th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/10
Inventor 陈仁富
Owner AOTAI ELECTRIC