Views: 89 Author: Alice Publish Time: 2025-06-24 Origin: Site
I. Fundamental Differences
High-frequency transformer: Power transformer operating above medium frequency (10kHz).
Pulse transformer: Wide-bandwidth transformer.
II. Application Differences
High-frequency transformer:
Main application: High-frequency switching power transformers in switching power supplies
Secondary application: High-frequency inverter power transformers in inverter power supplies and welding machines
Pulse transformer:
Radar and conversion technology
Matching load resistance to transmission line characteristic impedance
Step-up/down of pulse voltage
Pulse polarity reversal
Isolation between primary and secondary circuits
Phase relationship acquisition via multiple secondary windings
III. Operational Principles
High-frequency transformer:
Must minimize leakage inductance and distributed capacitance during design
Reason: Transmits high-frequency pulse square waves where parasitics cause:
• Surge currents
• Voltage spikes
• Top oscillation (ringing)
• Increased losses
Pulse transformer:
Converts sine-wave input to narrow-pulse output using core's magnetic saturation
High-Frequency Transformer
Power transformer operating >10kHz. Primarily used as:
Switching power transformers in switching power supplies
Inverter power transformers in inverter supplies/welding machines
Frequency classifications:
10kHz-50kHz, 50kHz-100kHz, 100kHz-500kHz, 500kHz-1MHz, >10MHz
Pulse Transformer
Wide-bandwidth transformer. For communication applications:
Nonlinear distortion is critical performance indicator
Must operate at core's initial permeability
Requires larger size even for low-power units (e.g. input transformers)
Key design focuses:
Frequency response optimization
Loss reduction