Inverter Welding Transformer Numerical Simulation Of The Magnetic Field

The middle-frequency transformer is a crucial component used in inverter welding power source. Transformer output power is the power of the output power, so their loss also accounted for a large proportion of the power loss. However, the presence of leakage magnetic field will increase the transformer's loss, and produce electronic equipment on surrounding electromagnetic interference, can cause serious local overheating transformer, so that was caused by insulation breakdown, and magnetic radical issues. The traditional method of testing is more complicated, mainly through specific experiments for testing, longer duration of the study, and research and development costs are high. If the transformer inside the finite element simulation of electromagnetic fields, not only have access to the electromagnetic field distribution is more complex, but also can calculate the exact loss of energy.This article adopts the ANSYS software to simulate the magnetic field in transformer. Though varying the size and material of the core, and the load, we can obtain different magnetic distributions and power loss in transformer. The research indicates that:1. When the transformer core shape changes, the main magnetic flux within the core depends on the shape, C-type magnetic leakage field in general larger than the E-type; at low load the transformer the C-less average power consumption , but the overall loss and the rate of change larger than the E-type.2. When the transformer size increases, the core internal magnetic field distribution of the same, but the magnetic flux density decreases gradually. Size is too small, the main magnetic flux when the internal reduced output power is also time-varying small; size is too large, though reduced magnetic flux leakage, the output power increases, but the volume and a corresponding increase in quality.3. Other parameters the same, the ferrite transformer flux density within the amorphous only 1 / 10, but the power loss of amorphous only 1 / 4, but at the same size, the glass can have a higher output power, Therefore, its power loss is relative to the same.4. With the increase of the load, the magnetic field density and average power consumption is gradually increasing, which C-type transformers change the law in the lower and higher loads, relatively stable, but in the middle load, big variations in ; E-type transformers as a whole increased by more stable, showed a nearly linear increase.5. By static magnetic field found in the transformer near the secondary side coil Department has a large magnetic field concentration, magnetic field distribution is more disordered, higher energy loss, fever and severe, less safe position, analyze the reasons is due to secondary side coil department mutation and the leakage magnetic field induction concentration.Though the analysis we can optimize the design of middle-frequency transformer.