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Easy arc ignition, inverter technology ( IGBT tube), Stable arc, molten pool to be controlled easily - details see: https://www.machineto.com/zx7-315ma-dc-inverter-mma-welding-machines-220v-380v-dual-power-supply-10134725

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Product Features:

Easy arc ignition

inverter technology ( IGBT tube)

Stable arc, molten pool to be controlled easily

Little spattering, not to stick to electrodes

Suitable for various acid, alkaline and heat-resistant steel welding rods

Digital ampere meter to preset welding current before welding

Applicable for 220V single-phase power and 380V three-phase power, with automatic identification of circuit

Technical Parameters

Model Property	ZX7-315MA
Input voltage(v)	1~ AC380V±10% / AC220V±10%
Rated input power(kw)	11
Rated no-load voltage(v)	68
Rated output current(A)	315
Thrust current range(A)	10~180
Rated duty cycle(%)	60
Current range(A)	20~315
Rated working voltage(v)	32.6
Efficiency(%)	90
Insulation grade	F
Shell Protection grade	IP21S
Cooling method	Air-cooled
Weight(kg)	15.5

About inverter welder(IGBT):

Since the advent of high-power semiconductors such as the insulated gate bipolar transistor (IGBT), it is now possible to build a switched-mode power supply capable of coping with the high loads of arc welding. These designs are known as inverter welding units. They generally first rectify the utility AC power to DC; then they switch (invert) the DC power into a stepdown transformer to produce the desired welding voltage or current. The switching frequency is typically 10 kHz or higher. Although the high switching frequency requires sophisticated components and circuits, it drastically reduces the bulk of the step down transformer, as the mass of magnetic components (transformers and inductors) that is required for achieving a given power level goes down rapidly as the operating (switching) frequency is increased. The inverter circuitry can also provide features such as power control and overload protection. The high frequency inverter-based welding machines are typically more efficient and provide better control of variable functional parameters than non-inverter welding machines.
The IGBTs in an inverter based machine are controlled by a microcontroller, so the electrical characteristics of the welding power can be changed by software in real time, even on a cycle by cycle basis, rather than making changes slowly over hundreds if not thousands of cycles. Typically, the controller software will implement features such as pulsing the welding current, providing variable ratios and current densities through a welding cycle, enabling swept or stepped variable frequencies, and providing timing as needed for implementing automatic spot-welding; all of these features would be prohibitively expensive to design into a transformer-based machine, but require only program memory space in a software-controlled inverter machine. Similarly, it is possible to add new features to a software-controlled inverter machine if needed, through a software update, rather than through having to buy a more modern welder.

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