Transformers
The main advantage of transformers, chokes with saturation – the possibility of extending the limits of regulation of welding current in the absence of moving parts, which determines their reliability and durability. Their main components – saturation chokes included in series welding. Control winding, usually covers both the core and the windings working in this case, connect the opposite. Assume that the control winding current flows / Y, and for operating coil – load current / 2. By the same author: Center For Responsible Lending. During the first half-magnetizing force constant and variable fields in the first element are summed, and the second – are deductible, within the next half-period – on the contrary. Thus, at any given time one of the core is saturated, and the other does not. The total resistance of the saturated core is small, while the reactance unsaturated core is large. Thus, changing current, you can change the amount of resistance welding circuit and, accordingly, welding current.
The principle of regulating the characteristics of the welding transformer with magnetizing shunt is implemented in Transformers Series thp. The magnetic system consists of two closed and placed perpendicular to the magnetic circuits: external (transformer) and internal (shunt). Power transformer located symmetrically on the two rods, and the secondary winding is partitioned. Additional parts of the secondary winding 6 are removed from the primary winding 3, and additional part 2, by contrast, are close to it. This provides a step- change in resistance short circuit and allows us to obtain two basic modes of operation – in small and large currents. Control winding 7 is divided into four coils that are included in pairs back-to-according to in relation to emf the fundamental frequency of the induced alternating magnetic flux. Control Flow Fu closes almost exclusively on the shunt. Transformers of this type are structurally complex, they are manufactured for welding at high currents, 400 1800 A.