What are the criteria for choosing magnetic materials for high frequency transformers?
High frequency transformer is more than the working frequency of intermediate frequency (10kHz) power transformer, mainly used for high frequency switching power transformer in high-frequency switching power supply, but also for the high frequency inverter transformer and high frequency inverter in high frequency inverter welder. According to the frequency of work, can be divided into several grades: 10kHz-, 50kHz, 50kHz-100kHz, 100kHz ~ 500kHz, 500kHz ~ 1MHz, 1MHz or more.
First, consider energy transfer;The two is to consider the geometric size constraints;Three is to consider the magnetic core cross-sectional area and window area ratio, multi-channel output transformer generally requires a larger window area, choose EE, EI or PQ type magnetic core, can have larger windows and good heat dissipation.
Magnetic materials have been widely used in our daily life, such as the permanent magnetic material is used as the core material used in motor, transformer, magnetic disc memory used as magnetic recording by computer, such as floppy disks.
