Title :
A new 40 kVA transistorized PWM inverter
Author :
Caruana, I. ; Patti, G. ; Piccirillo, P.
Author_Institution :
Italtel Soc. Italiana Telecommun. SpA, Milan, Italy
Abstract :
The authors describe a modular three-phase 40 kVA inverter developed as part of a 200 kVA UPS (uninterruptible power supply) unit for the processing system in telecommunications networks. The main characteristics of this inverter are: PWM (pulse-width modulation) conversion at high frequency; wide DC supply voltage range; 50 Hz or 60 Hz operation; parallel operation with equal sharing; good diagnostic coverage, with selective cutout of malfunctioning units; avoidance of interference with other units operating in parallel; synchronization between inverters and with external source; operation with unbalanced loads of whatever type, with no loss of performance; no operational limits imposed by load power factor; high immunity to current harmonics rejected by load; and easy accessibility to all parts and easy maintenance
Keywords :
invertors; pulse width modulation; uninterruptible power supplies; 200 kVA; 40 kVA; 50 Hz; 60 Hz; UPS; harmonic current immunity; parallel operation; pulse-width modulation; synchronization; telecommunications networks; three-phase; transistorized PWM inverter; uninterruptible power supply; wide DC supply voltage range; Frequency conversion; Frequency synchronization; Interference; Performance loss; Pulse inverters; Pulse width modulation inverters; Pulsed power supplies; Reactive power; Uninterruptible power systems; Voltage;
Conference_Titel :
Telecommunications Energy Conference, 1989. INTELEC '89. Conference Proceedings., Eleventh International
Conference_Location :
Florence
DOI :
10.1109/INTLEC.1989.88331
