For high-power high-frequency switching power supplies, the transformer's core is required to have low high-frequency loss, high saturation magnetic flux density Bs and low residual magnetic flux Br to obtain a large working magnetic flux ΔB. Therefore, the cross magnetic heat treatment process is adopted for nanocrystalline alloys to obtain a core with low residual magnetism and constant magnetic conductivity characteristics. Performance Characteristics High saturation magnetic induction intensity, effectively reducing the size of the device and lightening its weight High magnetic conductivity and low coercivity, improving the efficiency of the transformer and reducing the excitation power. · Low residual magnetism (Br ≤ 0.2T), achieving a greater magnetic induction increment and obtaining a greater output power · Low loss, reducing the temperature rise of the transformer and improving the efficiency of the transformer Excellent temperature stability, capable of operating continuously at temperatures ranging from -45℃ to 130℃. Application fields 1. Inverter welding machine power supply 2. X-ray power supply, laser power supply, communication equipment power supply 3. UPS uninterruptible power supply and high-frequency induction heating power supply 4. Charging power supply 5. Electrolytic electroplating power supply 6. Frequency conversion speed regulation power supply 7. Plasma cutting machine