[Explained] Offline and Online UPS Block Diagram
Hey, let's see and understand UPS Block Diagram. In this article, we will
discuss the Online UPS Block Diagram and Offline UPS Block Diagram. UPS
stands for Uninterruptible Power Supply. UPS is used with the electronic
devices which are required to keep on for sometime when the main power supply
is suddenly off. UPSs are mostly used with computers. So let's understand the
working principle of the Uninterruptible Power Supply from the block diagram of
UPS.
Online UPS Block Diagram
Here
the block diagram of Online UPS is given below.
As
you see in the above diagram, there are nine blocks are shown. Let's discuss
each block.
EMI
Filter: It
is made using inductors and capacitor. The main function of this EMI filter
circuit is to reduce or filter the electromagnetic interferences.
Rectifier
Circuit: The
rectifier circuit is used to convert AC to DC. As the UPS has the battery
inside it, and the battery can store only DC that is why we need to convert
input AC supply into DC.
DC
Filter Circuit: The
DC filter circuit is used to filter the impure DC comes from the rectifier
circuit. The DC output from the rectifier has some AC component. So the filter circuit is used to remove those AC components fro the DC supply.
Battery: The battery is
connected with the output of the DC filter circuit. When the UPS is connected
to the power supply the battery will charge.
Inverter
Circuit: Now
we have DC supply but, we need AC supply as output to drive the load. So the
inverter circuit is used to convert the DC to AC. The inverter Circuit is made
high-speed solid state switches such as MOSFET, SCR, etc. If your load required
DC supply then the Inverter Circuit is not required.
AC
Filter Circuit: The
AC filter circuit is used to filter the impure AC coming from the inverter
circuit.
Static
Switch: A
static switch is connected between the AC filter Circuit and the Critical Load.
Which allow or disallow the power flow from the UPS to load according to the
given condition.
Another
static switch is connected between the critical load and the main power supply
after the EMI filter Supply. This switch allows or disallows the power flow
from the main supply to the load.
In
the case of Online UPS, the lower static switch is normally ON and the upper
static is normally OFF. So in normal condition the power flow from the main
supply to the load through the total UPS circuitry. When the main power supply is not available, then the load takes power from the battery.
If
the UPS is unable to deliver power to the load then the upper static switch
will be ON and the lower Switch will be OFF. So in this case, the power will
directly flow from the main supply to the load.
Offline UPS Block Diagram
Here
the block diagram of Offline UPS is given below.
You
can see the block diagram of Offline UPS is the same as Online UPS. There is a
little difference between them.
In
the case of Offline UPS, the upper static switch is normally ON and lower
static switch is normally OFF. So in normal condition, the power directly flows
from the main supply to the load. At the same time, the battery will charge.
When the main power supply is not available, the upper static switch will be
OFF and the lower static switch will be ON. So the load takes power from the
battery.
- Circuit Diagram of UPS or Uninterruptible Power Supply
- Proper UPS Connection with Loads, Inverter, Computer at Home
- SMPS Block Diagram | Switched Mode Power Supply
- Inverter connection diagram. Install Inverter and Battery at Home.
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you for visiting the website. keep visiting for more updates.
[Explained] Offline and Online UPS Block Diagram
Reviewed by manoranjan das
on
6/07/2019
Rating:
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