Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1989-09-29
1991-05-21
Beha, Jr., William H.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
363 37, H02J 900, H02M 5458
Patent
active
050178008
ABSTRACT:
Power conversion apparatus for AC to DC to AC power conversion includes a rectifier bridge formed of rectifying devices (24,25) connected to an AC source (21) and providing a DC output to DC bus lines (27,28). A full bridge of active switching devices (30, 31, 34, 35) is connected across the DC bus lines to which a power source such as a battery (39) may also be connected. The load (36) and the AC power supply (21) share a common neutral line (33). The output of the bridge can provide AC output power to the load through a transformer (74). The power conversion apparatus allows full control of the currents on the load lines and AC input lines, even when the input and output are asynchronous. By providing an external DC power source such as a battery (39), uninterrupted power can be supplied to the load when the AC power source fails.
REFERENCES:
patent: 4644241 (1987-02-01), Maeda
patent: 4933831 (1990-06-01), Takahashi et al.
T. Kawabata et al., "Chargerless UPS Using Multi-Functional BIMOS Inverter", IEEE-IAS Conf. Record, 1986, pp. 513-520.
S. Manias et al., "Bilateral DC to AC Converter Employing a High Frequency Link", IEEE-IAS Conf. Record, 1985, pp. 1156-1162.
K. P. Gokhale et al., "Dead Beat Microprocessor Control of PWM Inverter for Sinusoidal Output Waveform Synthesis", PESC 85 Conf. Record, pp. 28-36.
D. M. Divan et al., "Zero Switching Loss Inverters for High Power Applications", IEEE-IAS Conf. Rec., 1987, pp. 626-639.
G. Venkataramanan et al., "Discrete Pulse Modulation Strategies for High-Frequency Inverter Systems", IEEE-PECS Conf. Record, 1989.
Beha Jr. William H.
Wisconsin Alumni Research Foundation
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