Large Size Ferrite Cores for High Power

Large Size Ferrite Cores for High Power
Large Size Ferrite Cores for High Power
Summary
Issue date:
November 2010
• 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.
(1/7)
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
General purpose inverter
Reactor choke
• 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
• All specifications are subject to change without notice.
003-02 / 20101108 / e16_1.fm
(2/7)
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
Initial permeability
Curie temperature
Saturation magnetic flux density
H=1194A/m
Remanent flux density
Coercive force
µi
Tc
Bs
Br
Hc
25kHz, 200mT
Core loss
Pcv
100kHz, 200mT
Electrical resistivity
Approximate density
Thermal expansion coefficient
Thermal conductivity
Specific heat
Bending strength
Young’s modulus
Magnetostriction
[23°C]
°C
[23°C]
[100°C]
[23°C]
[23°C]
[90°C]
[100°C]
ρ
dapp
α
κ
Cp
δb3
E
λs
mT
mT
A/m
kW/m3
Ω•m
kg/m3
1/K
W/mK
J/kg • K
N/m2
N/m2
PE22
1800
>200
510
410
140
16
79
80
520
3.0
4.8×103
12×10–6
5
600
9×107
1.2×1011
–0.6×10–6
PC40
2300
>200
500
380
125
15
64
70
420
6.5
4.8×103
12×10–6
5
600
9×107
1.2×1011
–0.6×10–6
PE90
2200
>250
530
430
170
13
60
68
400
6.0
4.9×103
12×10–6
5
600
9×107
1.2×1011
–0.6×10–6
• 1(mT)=10(G),1(A/m)=0.012566(Oe)
CORE LOSS vs. TEMPERATURE CHARACTERISTICS
900
200
PE22
25kHz-200mT
100kHz-200mT
PE22
150
700
PC40
Pcv(kW/m 3)
Pcv(kW/m 3)
PC40
100
PE90
PE90
500
50
0
0
20
40
60
80
Temperature(˚C)
100
120
300
0
20
40
60
80
Temperature(˚C)
100
120
• All specifications are subject to change without notice.
003-02 / 20101108 / e16_1.fm
(3/7)
CORE LOSS vs. FREQUENCY CHARACTERISTICS
MATERIAL:PE22
10000
10000
Material : PE22
Temp.23˚C
1000
Pcv (kW/m3)
Pcv (kW/m3)
1000
100
1
10
100
1000
Frequency (kHz)
Pcv (kW/m3)
Pcv (kW/m3)
10000
Material : PE22
Temp.80˚C
1
10
100
50mT
100mT
150mT
200mT
250mT
300mT
10
100
1000
Frequency (kHz)
1
10
10000
Material : PE22
Temp.90˚C
50mT
100mT
150mT
200mT
250mT
300mT
10
10000
100
1000
Frequency (kHz)
10000
Material : PE22
Temp.100˚C
1000
Pcv (kW/m3)
1000
Pcv (kW/m3)
100
1000
Frequency (kHz)
1000
100
100
50mT
100mT
150mT
200mT
250mT
300mT
10
1
10
10000
1
10
10000
Material : PE22
Temp.60˚C
50mT
100mT
150mT
200mT
250mT
300mT
10
10000
1000
10000
100
50mT
100mT
150mT
200mT
250mT
300mT
10
10000
Material : PE22
Temp.40˚C
100
1000
Frequency (kHz)
10000
100
50mT
100mT
150mT
200mT
250mT
300mT
10
1
10
100
1000
Frequency (kHz)
10000
Material : PE22
Temp.120˚C
Pcv (kW/m3)
1000
100
50mT
100mT
150mT
200mT
250mT
300mT
10
1
10
100
1000
Frequency (kHz)
10000
• All specifications are subject to change without notice.
003-02 / 20101108 / e16_1.fm
(4/7)
MATERIAL:PC40
10000
10000
Material : PC40
Temp.23˚C
1000
Pcv (kW/m3)
Pcv (kW/m3)
1000
100
1
10
100
1000
Frequency (kHz)
Pcv (kW/m3)
Pcv (kW/m3)
10000
Material : PC40
Temp.80˚C
1
10
100
50mT
100mT
150mT
200mT
250mT
300mT
10
100
1000
Frequency (kHz)
1
10
10000
Material : PC40
Temp.90˚C
50mT
100mT
150mT
200mT
250mT
300mT
10
10000
100
1000
Frequency (kHz)
10000
Material : PC40
Temp.100˚C
1000
Pcv (kW/m3)
1000
Pcv (kW/m3)
100
1000
Frequency (kHz)
1000
100
100
50mT
100mT
150mT
200mT
250mT
300mT
10
1
10
10000
1
10
10000
Material : PC40
Temp.60˚C
50mT
100mT
150mT
200mT
250mT
300mT
10
10000
1000
10000
100
50mT
100mT
150mT
200mT
250mT
300mT
10
10000
Material : PC40
Temp.40˚C
100
1000
Frequency (kHz)
10000
100
50mT
100mT
150mT
200mT
250mT
300mT
10
1
10
100
1000
Frequency (kHz)
10000
Material : PC40
Temp.120˚C
Pcv (kW/m3)
1000
100
50mT
100mT
150mT
200mT
250mT
300mT
10
1
10
100
1000
Frequency (kHz)
10000
• All specifications are subject to change without notice.
003-02 / 20101108 / e16_1.fm
(5/7)
MATERIAL:PE90
10000
10000
Material : PE90
Temp.23˚C
1000
Pcv (kW/m3)
Pcv (kW/m3)
1000
100
1
10
100
1000
Frequency (kHz)
Pcv (kW/m3)
Pcv (kW/m3)
10000
Material : PE90
Temp.80˚C
1
10
100
50mT
100mT
150mT
200mT
250mT
300mT
10
100
1000
Frequency (kHz)
1
10
10000
Material : PE90
Temp.90˚C
50mT
100mT
150mT
200mT
250mT
300mT
10
10000
100
1000
Frequency (kHz)
10000
Material : PE90
Temp.100˚C
1000
Pcv (kW/m3)
1000
Pcv (kW/m3)
100
1000
Frequency (kHz)
1000
100
100
50mT
100mT
150mT
200mT
250mT
300mT
10
1
10
10000
1
10
10000
Material : PE90
Temp.60˚C
50mT
100mT
150mT
200mT
250mT
300mT
10
10000
1000
10000
100
50mT
100mT
150mT
200mT
250mT
300mT
10
10000
Material : PE90
Temp.40˚C
100
1000
Frequency (kHz)
10000
100
50mT
100mT
150mT
200mT
250mT
300mT
10
1
10
100
1000
Frequency (kHz)
10000
Material : PE90
Temp.120˚C
Pcv (kW/m3)
1000
100
50mT
100mT
150mT
200mT
250mT
300mT
10
1
10
100
1000
Frequency (kHz)
10000
• All specifications are subject to change without notice.
003-02 / 20101108 / e16_1.fm
(6/7)
SATURATION MAGNETIC FLUX
DENSITY vs. TEMPERATURE
CHARACTERISTICS
INITIAL MAGNETIC PERMEABILITY vs.
TEMPERATURE CHARACTERISTICS
700
5000
PC40
600
PE90
PC40
400
PE22
3000
µi
Bs(mT )
500
4000
PE22
PE90
300
2000
200
1000
100
0
0
50
100
Temperature (˚C)
0
0
150
f=1kHz
Hm=0.4A/m
100
200
Temperature (˚C)
300
AMPLITUDE PERMEABILITY vs. SATURATION MAGNETIC FLUX DENSITY CHARACTERISTICS
7000
7000
7000
6000
6000
5000
5000
5000
µa
µa
µa
6000
120˚C
4000 100˚C
80˚C
60˚C
40˚C
3000
23˚C
4000 120˚C
100˚C
80˚C
60˚C
3000
40˚C
23˚C
2000
0
100
200
Flux density (mT )
2000
300
Material : PE90
f=16kHz
Material : PC40
f=16kHz
Material : PE22
f=16kHz
0
80˚C
60˚C
40˚C
100˚C
4000 23˚C
120˚C
3000
100
200
Flux density (mT )
2000
300
0
100
200
Flux density (mT )
300
MAGNETIC PERMEABILITY vs. FREQUENCY CHARACTERISTICS
4000
4000
4000
Material: PC40
Temp.: 23˚C
Hm=0.4A/m
Material: PE22
Temp.: 23˚C
Hm=0.4A/m
Material: PE90
Temp.: 23˚C
Hm=0.4A/m
3000
3000
3000
µ′
µ′
µ′′
1000
µ′, µ′′
2000
µ′, µ′′
µ′, µ′′
µ′
2000
µ′′
1000
2000
1000
µ′′
0
10
100
1000
Frequency (kHz)
10000
0
10
100
1000
Frequency (kHz)
10000
0
10
100
1000
Frequency (kHz)
10000
• All specifications are subject to change without notice.
003-02 / 20101108 / e16_1.fm
(7/7)
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.
λ=
C
f × µ r × εr
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 permeability, 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
Resonant dimension(mm)
10 3
PE22
PC40
10 2
101 1
10
10 2
Frequency (kHz)
10 3
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.
• All specifications are subject to change without notice.
003-02 / 20101108 / e16_1.fm
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement