TDK Ferrites EE320x250x20 User manual

• All specifications are subject to change without notice.
• Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific
bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.
Large Size Ferrite Cores for High Power
Summary
Issue date: November 2010

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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, PC40 and PE90 materials having superior magnetic characteristics.
APPLICATIONS
Transformer
High frequency inductive heater EE320x250x20
Uninterruptible Power Supply System(UPS)
CATV’s power supply
Photovoltaic power generation
Power supply of communications station
EC70,90,120
Electrical vehicle
PQ78,107
Automated warehouse, conveyor machine
Current sensor
Reactor choke
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
UU79x129x31
Trains
UU79x129x31

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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)
• 1(mT)=10(G),1(A/m)=0.012566(Oe)
CORE LOSS vs. TEMPERATURE CHARACTERISTICS
Material PE22 PC40 PE90
Initial permeability µi[23°C] 1800 2300 2200
Curie temperature Tc°C >200 >200 >250
Saturation magnetic flux density
H=1194A/m Bs[23°C] [100°C] mT 510 410
500
380
530
430
Remanent flux density Br[23°C] mT 140 125 170
Coercive force Hc[23°C]A/m161513
Core loss 25kHz, 200mT Pcv
[90°C]
kW/m3
79 64 60
[100°C] 80 70 68
100kHz, 200mT 520 420 400
Electrical resistivity ρΩ• m 3.0 6.5 6.0
Approximate density dapp kg/m34.8×1034.8×1034.9×103
Thermal expansion coefficient α1/K 12×10–6 12×10–6 12×10–6
Thermal conductivity κW/mK555
Specific heat CpJ/kg • K 600 600 600
Bending strength δb3 N/m29×1079×1079×107
Young’s modulus E N/m21.2×1011 1.2×1011 1.2×1011
Magnetostriction λs –0.6×10–6 –0.6×10–6 –0.6×10–6
150
200
100
50
0120100806040200
Temperature(˚C)
Pcv(kW/m3)
PC40
PE90
PE22
25kHz-200mT
900
700
500
300 120100806040200
Temperature(˚C)
Pcv(kW/m3)
PC40
PE22
PE90
100kHz-200mT

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CORE LOSS vs. FREQUENCY CHARACTERISTICS
MATERIAL:PE22
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE22
Temp.23˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE22
Temp.40˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE22
Temp.60˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE22
Temp.80˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE22
Temp.90˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE22
Temp.100˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE22
Temp.120˚C

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MATERIAL:PC40
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PC40
Temp.23˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PC40
Temp.40˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PC40
Temp.60˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PC40
Temp.80˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PC40
Temp.90˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PC40
Temp.100˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PC40
Temp.120˚C

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MATERIAL:PE90
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE90
Temp.23˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE90
Temp.40˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE90
Temp.60˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE90
Temp.80˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE90
Temp.90˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE90
Temp.100˚C
1
10
100
1000
10000
10 100 1000 10000
50mT
100mT
150mT
200mT
250mT
300mT
Frequency (kHz)
Pcv (kW/m3)
Material : PE90
Temp.120˚C

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SATURATION MAGNETIC FLUX INITIAL MAGNETIC PERMEABILITY vs.
DENSITY vs. TEMPERATURE TEMPERATURE CHARACTERISTICS
CHARACTERISTICS
AMPLITUDE PERMEABILITY vs. SATURATION MAGNETIC FLUX DENSITY CHARACTERISTICS
MAGNETIC PERMEABILITY vs. FREQUENCY CHARACTERISTICS
100
200
300
400
500
600
700
0150100500
Temperature(˚C)
Bs(mT)
PE22
PC40
PE90
2000
1000
5000
03002001000
Temperature(˚C)
µi
PE22
PE90
PC40
4000
3000
f=1kHz
Hm=0.4A/m
2000
3000
4000
5000
6000
7000
0 100 200 300
Flux density(mT)
µa
120˚C
100˚C
80˚C
60˚C
40˚C
23˚C
Material : PC40
f=16kHz
2000
3000
4000
5000
6000
7000
0 100 200 300
Flux density(mT)
µa
120˚C
100˚C
80˚C
60˚C
40˚C
23˚C
Material : PE22
f=16kHz
120˚C
100˚C
80˚C
60˚C
40˚C
23˚C
2000
3000
4000
5000
6000
7000
0 100 200 300
Flux density(mT)
µa
Material : PE90
f=16kHz
1000
2000
4000
3000
01000010 100 1000
Frequency(kHz)
µ′, µ′′
µ′
µ′′
Material: PC40
Temp.: 23˚C
Hm=0.4A/m
1000
2000
4000
3000
01000010 100 1000
Frequency(kHz)
µ′, µ′′
µ′
µ′′
Material: PE22
Temp.: 23˚C
Hm=0.4A/m
1000
2000
4000
3000
01000010 100 1000
Frequency(kHz)
µ′
, µ′′
µ′
µ′′
Material: PE90
Temp.: 23˚C
Hm=0.4A/m

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DIMENSIONAL RESONANCE
Dimensional resonance is a phenomenon which increases loss
and decreases magnetic permeability by electromagnetic standing
waves when the magnetic field of the core frequency is applied.
The phenomenon appears when the maximum dimension of the
cross section of the core perpendicular to the magnetic field is the
integral multiple of about half of the electromagnetic wavelength λ.
C: Electromagnetic wave speed in a vacuum(3.0×108m/s)
µr: Relative magnetic permeability
εr: Relative permissivity
f: Frequency of the applied magnetic field(electromagnetic wave)
As µe decreases by inserting into the gap, using the same core
enables high frequency wave usage as indicated by the formula
above.
As dimensional resonance quickly decreases magnetic permeabil-
ity, design the actual frequency to avoid dimensional resonance.
In the case of possible dimensional resonance, it can be protected
against by dividing the core in the magnetic circuit direction and
bonding them.
RESONANCE DIMENSION vs. FREQUENCY
CHARACTERISTICS
GENERAL PRECAUTIONS WHEN USING FERRITE CORE
• When selecting the material/form of the ferrite core, while
considering the margins select from the range in the catalog
(product manual) display where factors such as inductance
value, maximum saturation flux density, core loss, temperature
characteristics, frequency characteristics and Curie temperature
are concerned.
• Select material that does not corrode or react in order to avoid
insulation failure or a layer short, and also be careful to avoid
loose winding of the core or causing damage to the wire.
• Be careful that the equipment and tools you use do not strike the
core in order to avoid core cracks.
• Please consider using cases, bobbins or tape for insulation
purposes.
• When using cases and bobbins, select those with a heat
expansion coefficient as close to that of the ferrite as possible.
• When laying out the case, bobbin, coil and the ferrite core,
create clearance between each part in order to prevent any core
cracks and to assure insulation.
• Please handle with care, since a ferrite core is susceptible to
shock.
• The outward appearance is determined according to the
standard of our company.
• Do not place close to strong magnets.
• Be careful not to cause shock by the use of equipment and tools.
• Be careful not to expose to rapid change in temperature, since it
is also susceptible to thermal shock.
• Careless handling may hurt your skin, since the corners of the
polished surface of the ferrite are very sharp, and in some
cases, burrs may have formed on the surface.
• Please be very careful when stacking and handling the
containers, since some ferrite cores are heavy, and can cause
injury, toppling or back pain.
• Where inner packaging is concerned, please be careful not to
damage the core when taking it out from the container since the
packing materials used in order to prevent damage during
transportation may make it difficult to take out.
• Do not reprocess the ferrite core as it can cause problems, such
as injury.
λ=f × µrεr
×
C
103
102
101103
102 101
Frequency(kHz)
Resonant dimension(mm)
PE22
PC40