| 摘要 |
The formation of ferro-resonance between the voltage converter and the power supply is prevented in that a small portion (1) of the iron cross-section is surrounded by a short-circuiting winding (2). In normal operation there is virtually no current in said winding. In the event of an increase in induction which leads to core saturation, the flux also flows through the short-circuiting winding (2) and the load which now occurs cancels the resonance state. The simple construction ensures absolute operating reliability. <IMAGE>
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