Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1990-11-13
1992-03-24
Skudy, R.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363132, 318811, H02M 5458
Patent
active
050994107
ABSTRACT:
A power conversion apparatus (20) circuit includes pairs of rectifying devices (48,49) connected together at a first node, a pair of capacitors (50, 51) connected together at a second node, and pairs of controllable switching devices (53,54) connected together at a third node, each of the pairs being connected in parallel by DC bus lines (58,59). The AC power source (21) is connected between the first and second nodes and the output voltage to a load (22) is provided between the first and third nodes. The switching devices (53,54) are controlled to switch on and off at proper times to provide a controllable output voltage to the load (22) which is at the same frequency as the input voltage and which may be controlled from zero to substantially twice the peak-to-peak input voltage. The output voltage waveform provided to the load can be filtered to provide a substantially sinusoidal waveform to the load. The power conversion apparatus (20) can also function as an uninterruptible power system by connecting an energy storage device, such as a large capacitor (140 ) or a battery (146) across the DC bus lines (58,59), and by controlling the charging of the energy storage device when power is available for the source and discharging the storage device when the power source fails.
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patent: 5017800 (1991-05-01), Divan
D. M. Divan, "A New Topology for Single-Phase Uninterruptible Power Supplies," IEEE-Industry Applications Society Conference Record, 1989, pp. 931-936.
D. M. Divan, "A New Topology For Single Phase UPS Systems," No Date.
D. M. Divan, T. A. Lipo, T. G. Habetler, "PWM Techniques For Voltage Source Inverters," Tutorial Notes, Power Electronics Specialists Conference '90, San Antonio, Texas, Jun. 1990.
Skudy R.
Todd Voeltz Emanuel
Wisconsin Alumni Research Foundation
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