TDK's Coil outstanding preventing electromagnetic interference(EMI) ra

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TDK's Coil outstanding preventing electromagnetic interference(EMI) ra

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Differential Mode Choke Coils Signal Power Line Application Manual Noise Suppression
TDK's Coil outstanding preventing electromagnetic interference(EMI) radio frequency interference(RFI). material used which, comparison with conventional ferrite materials, shows marked improvement prevention RFI. CORE FEATURES Since extremely high saturation flux density maintained, large current possible shape reduced compact designing. result outstanding permeability frequency characteristics, impedance-frequency characteristics expansive fully covered band. Temperature characteristics shows excellent linearity. Since relative loss factor very high, EMI/RFI prevention effect remarkable. COIL FEATURES result employing Core, which outstanding characteristics described previously, Coil provides following features. compared conventional coil which used ferrite silicon steel cores, EMI/RFI prevention effect shows good result. More compact designing possible comparison conventional coils. Since toroidal shape employed, leakage flux acoustic noise level. Outstanding effectiveness against EMI/RFI entering through lines generated from thyristor control circuit. TEMPERATURE RANGES
Operating Storage +105°C[Including self-temperature rise] +105°C
APPLICATIONS
Equipment which uses thyristors(SCR, Prevent radiation regulation CISPR VCCI TRIAC, etc.) Lighting control equipment: Dimmers Heating control equipment: Industrial equipment, home electric heaters (electric blankets, electric jars, heaters, electric furnaces) Speed control equipment: Office equipment, copying machines, medical EMI/RFI prevention equipment, electrical machines,electrical drill, home appliance products(washing machines, electric fans, mixers, conditioners) Switching power supplies spike noise Motors Others: Spike noise from various contact points Various terminal equipment Prevent intrusion Micro computers, radio communication equipment, etc. Prevention malfunction control equipment Micro computers, switching power supplies, acoustic equipment, phones, test equipment, electronics equipment
specifications subject change without notice.
(2/5) 20010518 e980_sf.fm
Differential Mode Choke Coils Signal Power Line Application Manual Noise Suppression
CHARACTERISTICS CORE MATERIAL
Item Applicable frequency Unit Typical value 75(at 300kHz) 3(at 300kHz) 5.2(-20 +20°C) 5.2(+20 +60°C) 1400 Fig.
TYPICAL CIRCUITS PREVENT RADIATION Thyristor noise
Load
Contact noise
Temperature stability Saturation magnetic flux density
TYPICAL ELECTRICAL CHARACTERISTICS µi-f Tan/µ-f CHARACTERISTICS(Fig.1)
1000
Semiconductor switching noise
Switching power supply
Test core: T-12
tan/
0.03
PREVENTING INTRUSION Preventing external noise, Preventing external noise, line line
Power source electronic equipment circuit p.c. board
0.01
0.003
Frequency (kHz)
0.001
tan/
TEMPERATURE CHARACTERISTICS(Fig.2)
L/L(%)
CIRCUIT DESIGN NOTES WHEN USING COIL Observe following points effective design circuits when employing coil thyristor control circuit. CORRECT COIL INSTALLATION POSITION Correct Incorrect
Load Load
Temperature (°C)
coil will float more because preventive effect will reduced.
CORRECT CAPACITOR INSTALLATION POSITION Correct Incorrect
Test core: T-12 Load Load
HYSTERESIS CHARACTERISTICS(Fig.3)
1500 Magnetic flux density (mT) 1000 24000 16000 8000 8000 16000 24000 Magnetic field (A/m)
1000 1500 Test core: T-12
specifications subject change without notice.
Load
(3/5) 20010518 e980_sf.fm
Differential Mode Choke Coils Signal Power Line Application Manual Noise Suppression
SUITABLE CAPACITOR optimum pass filter designed obtained employing capacitor 0.3µF. TYPICAL EFFECT CAPACITOR
1MHz SF-T8-50S Measuring method: Radio wave propagation Turn angle Thyristor control circuit AC.100V Load 120W 0.01 0.02 0.05 Capacitance 0dB=1µV Temperature rise (°C)
TYPICAL RELIABILITIES TEMPERATURE INCREASE WITH RESPECT RATED CURRENT
Time (Hr) Temperature: 22°C Humidity: 60(%)RH Insulated 100V Thermocouple SF-T10-50 (Rated SF-T8-50S (Rated SF-T12-50 (Rated
Terminal interference voltage (dB)
0.5MHz
TEMPERATURE STABILITY
0dB=1µV Terminal interference voltage (dB) Before test After test
C.R. INSTALLATION POSITION TURNOFF PREVENTION When pass filter installed thyristor control circuit, since ignition become impossible oscillating current, install turnoff prevention C.R. shown below.
Load Load
SF-T12-50 Load 500W
SF-T8-50S Load 120W
coil
coil
Frequency (MHz)
HUMIDITY STABILITY
0dB=1µV Terminal interference voltage (dB) Before test After test 40°C, 95(%)RH 2000Hr SF-T12-50 Load 500W
SF-T8-50S Load 120W
Frequency (MHz)
specifications subject change without notice.
(4/5) 20010518 e980_sf.fm
Differential Mode Choke Coils Signal Power Line Application Manual Noise Suppression
TYPICAL PREVENTION EFFECTS PREVENTION EFFECTS
0dB=1µV Without coil Terminal interference voltage (dB) Terminal interference voltage (dB) Without coil
PREVENTION EFFECTS
0dB=1µV
SF-T8-40S
SF-T12-40 SF-T12-50 AC.100V 120W Measuring method: Radio wave propagation Turn angle C=0.1µF
SF-T8-50S
Frequency (MHz)
Frequency (MHz)
PREVENTION EFFECTS
0dB=1µV Without coil Terminal interference voltage (dB)
PREVENTION EFFECTS COMPARED FERRITE
0dB=1µV Terminal interference voltage (dB) Mn-Zn ferrite L=1mH Mn-Zn ferrite L=100µH Without coil
SF-T8-50D
SF-T12-50
Frequency (MHz)
Frequency (MHz)
PREVENTION EFFECTS
PREVENTION EFFECTS COMPARED Si-STEEL Mo-PERMALLOY
0dB=1µV Terminal interference voltage (dB) Without coil Si-steel EL-40 L=1mH Mo-Permalloy L=125µH
0dB=1µV Terminal interference voltage (dB) Without coil SF-T10-30 SF-T10-40 SF-T10-50
SF-T8-50S
Frequency (MHz)
Frequency (MHz)
specifications subject change without notice.
(5/5) 20010518 e980_sf.fm
Differential Mode Choke Coils Signal Power Line Application Manual Noise Suppression
TYPICAL ELECTRICAL CHARACTERISTICS INDUCTANCE SUPERPOSITION CHARACTERISTICS SF-T8S
SF-T8-40S SF-T8-50S Inductance Test equipment: YHP-4260A Test frequency: 1kHz
SF-T8D
SF-T8-50D Test equipment: YHP-4260A Test frequency: 1kHz
Inductance
1000 2000 current (mA)
5000
1000 2000 current (mA)
5000
SF-T10
SF-T10-40 SF-T10-50 Test equipment: YHP-4260A Test frequency: 1kHz
SF-T12
SF-T12-50 SF-T12-40 Test equipment: YHP-4260A Test frequency: 1kHz
Inductance
SF-T10-30
1000 2000 5000 10000 current (mA)
Inductance
1000 2000 5000 10000 current (mA)
specifications subject change without notice.

TDK's Coil outstanding preventing electromagnetic interference(EMI) ra

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