MOSFET Inverter

For converting direct current (DC) to alternating current (AC), an inverter is the perfect device. The Inverter has a gate drive circuit for controlling the power metal oxide silicon field effect transistors or MOSFETs of the MOSFET inverters. The most important characteristic of these inverters is that they can be used for handling large electric currents at high voltages. With the gateways having high impedances, the input power that flows through the gateways can be quite low. Despite this, the voltage generated is quite high, and this unique feature of the system has led to them being used quite popularly for satisfying large industrial requirements. Longevity Welding features MOSFET Inverter technology to make Longevity Welding equipment extremely portable, competitively affordable, and reliable for most applications such as light fabrication and for hobbyist uses.

Using this efficient and patented MOSFET inverter technology in Longevity welding equipment has proved extremely beneficial for the welding industry and metal fabrication uses. With a MOSFET Inverter in use, the amount of power that is required to run a welder is quite low in comparison with Transformer Welding Equipment. Another major benefit is the size of an inverter based welder vs a Transformer Welder. MOSFET technology has made it possible to run rather high voltage equipment and machinery on the inverter in case of power cuts. An eco-friendly technology in the sense that less power inputs in the form of electricity inflow or direct current generate large power outputs of alternate current, the MOSFET Inverter in a welder or plasma cutter enables for Welders to work in numerous locations where a transformer unit will not fit nor is possible to transport. The MOSFET Inverter vs Transformer comparison has a drastic difference in weight. MOSFET inverter welders and cutters range from 20-70lbs and no bigger than 24inches, where transformer units are several hundred pounds and sizes range in feet.  

How does MOSFET Technology Work?  

The gate drive power circuit of MOSFET inverters includes a power transformer, which directs the current flow through the two halves of the power winding. A pair of power MOSFETs is installed in this circuit to maximize the output of alternate electrical current generated by the MOSFET inverters by minimizing the input requirement of direct power current. Such a gate driver circuit produces controller signal that are around 180 degrees out of phase across the transformers secondary wiring that is center tapped. Two fast off slow on coupling circuits replete with a diode and is connected in parallel with a resistor. This couples signals from gate controls to signals from power MOSFETs. Each circuit is in line with a series of current limiting - off time setting resistors. These resistors are in turn connected with the two halves of the primary winding of the gate driver circuit control transformers. The relation between resistors of current limiting resistors and those of the coupling circuits is responsible to deduce the turn on and turn off times of the MOSFETs. The current limiting resistors are so effective that they prevent any burnout of the gate driving contact transformers and the gate control transistors.  

Effective and durable in the construction of its circuit, these MOSFET inverters are becoming well known to be featured in welding equipment because they provide welding professionals or enthusiasts alternatives to portable and affordable welding equipment. Longevity offers the most durable MOSFET inverters that are available in the market because they are designed by TOSHIBA. With Longevity already building a name in the welding industry and carrying the most reliable MOSFET technology inside our welding and plasma cutting equipment, we are quickly being recognized by friends, customers, dealers, and professional welders and enthusiasts as a leading alternative to the overpriced brands.