TDK EE320x250x20 User Manual
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Large Size Ferrite Cores for High Power
Summary
Nowadays, more and more high-frequency circuits are being used in industrial equipment as well as consumer equipment. With the use of
higher frequencies, silicon steel sheets have become unsuitable for magnetic material used in transformers. Ferrite, its substitute, delivers
reduced core loss at high frequencies and is the optimum material for high-power requirements.
To meet these various demands, we at TDK have employed our ferrite development technologies accumulated over the years and
advanced production technologies to offer large, high-quality cores for high-frequency, high-power power supplies.
In the following information, introduce ferrite cores that used PE22 and PC40 materials having superior magnetic characteristics.
APPLICATIONS
High frequency inductive heater EE320x250x20
Transformer
Reactor choke
Uninterruptible Power Supply System(UPS)
CATV’s power supply
Photovoltaic power generation
Power supply of communications station
Electrical vehicle
Automated warehouse, conveyor machine
Current sensor
General purpose inverter • Air conditioner
• Fun
• Pump
• Printing press
• Packing machine
• Machines for food industry
• Drier
• Compressor of freezer
• Textile machine
• Woodworking machine
• Medical machine
Trains
EC70,90,120
PQ78,107
UU79x129x31
UU79x129x31
• All specifications are subject to change without notice.
002-01 / 20071116 / e16_1.fm
FEATURES
• Large size ferrite cores developed for reactors and transformers used in high power units.
• Please contact us for machinability of non-standard special forms.
MATERIAL CHARACTERISTICS (Typical)
Material PE22 PC40
Initial permeability µi [23°C] 1800 2300
Curie temperature Tc °C >200 >200
Saturation magnetic flux density
H=1194A/m
Remanent flux density Br [23°C] mT 140 125
Coercive force Hc [23°C] A/m 16 15
Core loss
25kHz, 200mT
100kHz, 200mT
Electrical resistivity ρΩ • m 3 6.5
Approximate density dapp kg/m
Thermal expansion coefficient α 1/K 12×10–612× 10
Thermal conductivity κ W/mK 5 5
Specific heat C
Bending strength δb3 N/m
Young’s modulus E N/m
Magnetostriction λs–0.6× 10–6–0.6× 10
• 1(mT)=10(G),1(A/m)=0.012566(Oe)
[23°C]
Bs
[100°C]
mT
Pcv [100°C] kW/m
p J/kg • K 600 600
510
410
80
3
520
3
4.8× 1034.8× 10
2
9× 10
2
1.2× 10111.2× 10
7
500
380
70
420
9× 10
3
–6
7
11
–6
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CORE LOSS vs. TEMPERATURE CHARACTERISTICS
200
150
)
3
100
kW/m
(
cv
P
PE22
PC40
50
0
Temperature(˚C
25kHz-200mT
)
800
)
3
600
kW/m
(
cv
P
400
120100806040200
0
PE22
PC40
Temperature(˚C
100kHz-200mT
)
120100806040200
• All specifications are subject to change without notice.
002-01 / 20071116 / e16_1.fm
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