Frequency converter having an intermediate circuit without any capacitors

The invention relates to a frequency converter comprising an intermediate circuit (6) without a capacitor, and a power supply unit (12) for an electronic system of said converter. Said power supply unit (12) comprises an input-side back-up capacitor (CP) that is electrically mounted in parallel with...

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Bibliographische Detailangaben
1. Verfasser:	BRUCKMANN MANFRED,SCHIERLING HUBERT
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	The invention relates to a frequency converter comprising an intermediate circuit (6) without a capacitor, and a power supply unit (12) for an electronic system of said converter. Said power supply unit (12) comprises an input-side back-up capacitor (CP) that is electrically mounted in parallel with the intermediate circuit (6) without a capacitor, a supply line (14) of the back-up capacitor (Cp) comprising a decoupling diode (16). According to the invention, a turn-off semiconductor (22) is electrically mounted in inverse-parallel with the decoupling diode (16), the control input of said semiconductor being connected to an output of a power failure detection device (24). In this way, a modified frequency converter comprising an intermediate circuit (6) without a capacitor can be provided, in which a standard option kinetic back-up supply can be used.