About the classification and characteristics of ferrite cores
Ferrite cores are mainly composed of iron (Fe), manganese (Mn), and zinc (Zn) 3 metal elements, usually called manganese-zinc ferrite. Ferrite core is made of dense and homogeneous ceramic structure non-metallic magnetic material, with low coercivity, also known as soft ferrite. Ferrite core products are used in traditional analog and modern digital communication fields, with stable performance and good reliability.
Introduction to the classification and characteristics of ferrite cores:
ER power core
Features: The coupling position is good, the center column is circular, which is convenient for winding and the winding area is enlarged, and the transformer with high power and small leakage inductance can be designed.
Uses: switching power supply transformers, pulse transformers, electronic ballasts, etc.
ETD power core
Features: The center column is circular, the winding wiring is convenient and the winding area is enlarged, and the transformer with high power and small leakage inductance can be designed. Other aspects such as assembly cost, safety cost, electromagnetic shielding, difficulty in standardization and so on are good.
Uses: switching power supply, transmission transformer, electronic ballast. Widely used in household appliances, communications, lighting, medical equipment, office automation, military products, OA equipment, electronic instruments, aerospace and other fields. EQ/EQI type power core
EP type power core
Features: It has the advantages of good magnetic shielding effect, small distributed capacitance, low transmission loss, high inductance, small leakage inductance, uniform magnetic field distribution, etc., and the skeleton is equipped with multiple connectors, which makes it easy to design multiple output transformers.
Uses: Broadband transformers, inductors, isolation transformers, matching transformers, widely used in the fields of program-controlled switchboard terminals and electronic equipment.
EFD type power core
Features: It has the advantages of low thermal resistance, low attenuation, high power, and wide working frequency. The finished product is light in weight, reasonable in structure, and easy to surface mount.
Uses: Widely used in small and high-power transformers, such as instruments, module power supplies, computer terminal output, etc.
EPC power core
Features: It has the advantages of low thermal resistance, low attenuation, high power, wide operating frequency, light weight, reasonable structure, easy surface mounting, and good shielding effect, but the heat dissipation performance is slightly worse.
Uses: Widely used in transformers with small size, high power, shielding and electromagnetic compatibility requirements, such as instruments, program-controlled switch module power supplies, navigation equipment, etc.
POT power core
Features: small size, high inductance, convenient winding, balanced magnetic shielding and heat dissipation. Uses: carrier filter, high sensitivity inductor, efficiency sensor, power conversion transformer, etc.
PQ power core
Features: low loss, low temperature rise, good anti-interference performance, reasonable shape, large power range (50W-1000W), can effectively reduce the installation volume, equipped with multiple pins, and convenient winding and wiring. The assembly cost is low and it is easy to meet the safety requirements, but it is difficult to standardize.
Uses: main power transformer, drive transformer, smoothing choke, auxiliary power transformer. Mainly used in network, communication, power supply, electrical equipment, medical and other fields.
RM type power core
Features: good magnetic shielding effect, strong anti-interference ability, small magnetic leakage, low distributed capacitance, the frame is equipped with multiple pins, multiple output transformers can be designed, and high-density installation is possible. But the heat dissipation is poor, and the safety cost is higher.
Uses: auxiliary power transformer, drive transformer, broadband transformer, carrier filter, high stability filter. Mainly used in the fields of carrier communication, network, digital, television, electronic equipment, etc.