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inverter dc choke question

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I want to use the following common mode choke DLE-302U-5A (3mH 5A 250VAC/DC) as the common mode choke from the DC stage of an inverter.
In this stage the voltage is the rectified mainsvoltage, hence ~300VDC (220VACRMS* 1.414). I want also to use an 3phase autotransformer to fed the rectifier in order to have on the DC stage about 400VDC.
The question is: can I use this filter given its voltage rating and my voltage requirements? Or I need a filter with working voltage above 400V?
 

Hi,

The choke is rated for 250V DC.
This means 300V DC and 400V DC are off specification.

It's your own risk if you use it.

Klaus
 

Consider that both windings are separated by a coil former with rather large creepage distance. 400 VDC shouldn't be a problem.
 

The voltage rating of an inductor is the maximum voltage that can be applied to the terminals without causing arc- ing or insulation breakdown. Voltage above the maximum rating may cause short circuits between turns, through the insulation, or from the windings to core or frame.
Hear DLE-302U-5A is well designed to meet the high voltage requirement. Cores are covered with plastic case and windings are separated with insulating material (For low leakage, equal inductance and winding distribution) Rated for 250V it means without arc ing/brake down it should work three times higher voltage. So you can use this inductor for 400V also for testing purpose.
 

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