UPS Technology - Comparison
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Re: UPS Technology - Comparison
There is no direct answer to your question if I understand you correctly. The battery voltage will be dictated by the number of cells, the battery technology (vrla or flooded), and the manufacture used in the system.
There is no direct answer to your question if I understand you correctly. The battery voltage will be dictated by the number of cells, the battery technology (vrla or flooded), and the manufacture used in the system.
Re: UPS Technology - Comparison
Thanks. Years ago I was involved in the replcement of an existing UPS which I believe was of a step wave design. Consideration was given to going with a ferro or pwm design but it could not be done since the DC link for the newer designs required a much higher (2X ?) DC voltage than the existing design. This would have required an increase in the number of cells and the available space in the battery room was limited. End result - went back to same design.
However that was years ago so my question is...in general does one type of UPS design (PWM, Ferro, Step-Wave) generally require a higher DC link than another, either because of circuit design, efficiency, etc.
Thanks. Years ago I was involved in the replcement of an existing UPS which I believe was of a step wave design. Consideration was given to going with a ferro or pwm design but it could not be done since the DC link for the newer designs required a much higher (2X ?) DC voltage than the existing design. This would have required an increase in the number of cells and the available space in the battery room was limited. End result - went back to same design.
However that was years ago so my question is...in general does one type of UPS design (PWM, Ferro, Step-Wave) generally require a higher DC link than another, either because of circuit design, efficiency, etc.
Re: UPS Technology - Comparison
Not sure this is going to answer your question. UPS are designed as a system. In the case of dual conversion unit AC-DC-AC, requires three subsystems, rectifiers, batteries, and inverters. All three have to be matched in terms of capacity, voltage, and ampreage. So if you were to change out the inverters with something else, they would have to match the existing battery voltage and capacity.
Not sure this is going to answer your question. UPS are designed as a system. In the case of dual conversion unit AC-DC-AC, requires three subsystems, rectifiers, batteries, and inverters. All three have to be matched in terms of capacity, voltage, and ampreage. So if you were to change out the inverters with something else, they would have to match the existing battery voltage and capacity.
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