Title :
The DC-link capacitor current in pulsed single-phase H-bridge inverters
Author_Institution :
Automotive Syst. Powertrain, Siemens VDO Automotive AG, Regensburg
Abstract :
In case of controlling a pulsed single-phase H-bridge inverter with two and three voltage levels the capacitor currents in the DC-link circuit are calculated analytically. For these calculations first a sinusoidal modulated voltage and sinusoidal current at the output of the inverter are presupposed. Afterwards the additional load of the DC-link capacitors caused by harmonic currents of the output filter circuit is examined. For this reason the individual harmonics of the DC-link current with sinusoidal and with overlaid harmonic output currents are calculated with help of spectral analysis. At last the influence of the switching processes to the DC-link circuit load is discussed. The theoretically determined currents in the DC-link capacitors are compared with several practical measurements
Keywords :
bridge circuits; invertors; power capacitors; power harmonic filters; DC-link capacitor current; harmonic output currents; pulsed single-phase H-bridge inverters; sinusoidal current; sinusoidal modulated voltage; spectral analysis; Automotive engineering; Bridge circuits; Capacitors; Current measurement; Power harmonic filters; Pulse circuits; Pulse inverters; Pulse modulation; Uninterruptible power systems; Voltage control; Converter circuits; Harmonics; High frequency power converter; Measurements; Power transmission; Uninterruptible power supplies (UPS);
Conference_Titel :
Power Electronics and Applications, 2005 European Conference on
Conference_Location :
Dresden
Print_ISBN :
90-75815-09-3
DOI :
10.1109/EPE.2005.219197
