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Technical data chokes
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Line reactor conform to EN 61558, EN 5008-1 and -2, EN 50082-1 and -2
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Frequency range:
Test voltage:
Good EMC conditions
High thermal stability
Insulation class
Max. ambient temperature:
Fire class:
Prepared for protection index I
Safety class:
Voltage range:
Varnished twice under vacuum
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50 Hz - 1 kHz
Winding - core 2,5 kV
B or F
40°C
UL94V0
IP00
0 - 400 V, other values on request
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The given energy is only a guideline value
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Current
Inductance
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can be chosen, the inductance is determined by type size and energy
can be chosen, the current is determined by type size and energy
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Tolerance of energy +/- 30%
Terminals are shock proof conform to VBG4
Flat connectors for bolts or plugs, not shock proof
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Uk - calculation of a choke’s voltage drop
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The voltage drop of a smoothing coil and thus the voltage reduction of the connected load at the output can be determined as following. The inductive or reactive reactance (XL) of the smoothing choke can be calculated with the inductance of the choke (L) and the mains frequency (fmains).
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XL = ω . L = 2 . fmains . L
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The voltage drop (Uk) of the smoothing choke can be calculated with the rated current (IN) and the inductive reactance of the choke (XL):
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for one-phase smoothing coils: Uk = IN . XL
for three-phase smoothing coils: Uk = IN . XL . √ 3
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Example:
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Calculation of the voltage drop (Uk) of an one-phase smoothing coil (Uk) with an inductance of
L = 0,3 mH, a current of I = 100 A and a rated voltage of 230 V at f = 50 Hz.
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Reactance: XL = ω . L = 2 . 50Hz . 0,3mH = 0,094Ω
Voltage drop: Uk = IN . XL . = 100A . 0,094Ω = 9,4V
Or given as percentage to mains voltage: UK% = Uk / Umains = 9,4/ 230 = 4%
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At an american net with U = 110 V at f = 60 Hz, the choke acts as following:
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Reactance: XL = ω . L = 2 . 60Hz . 0,3mH = 0,113Ω
Voltage drop: Uk = IN . XL . = 100A . 0,113Ω = 11,3V
Or given as percentage to mains voltage: UK% = Uk / Umains = 11,3/ 110 = 10,2%
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This means the same choke will have more than twice the Uk, if operated in an american net.
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Tauscher chokes are calculated to have a small Uk%. Especially cut cores and cores made of amorphous and nanocrystalline materials have a small Uk% and thus low losses and a very good attenuation of harmonics.
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