The post discuses a simple 220 V to 220V DC online UPS inverter circuit. The idea was requested by Mr. Taiye.
Technical Specifications
Hi dear Swagatam, I intend to build a 1000 watt UPS with a different concept (inverter with high voltage input dc).
I will use a battery bank of 18 to 20 sealed batteries in series each 12 volts/ 7 Ah to give a 220+ volts storage as input to a transformerless inverter.
Can you suggest a simplest possible circuit for this concept which should include a battery charger + protection and auto switching by mains failure. Later I will include a solar power input too.
The Circuit Design
A very simple design can be witnessed in the above diagram for the proposed 220V DC UPS inverter circuit. Thanks to the IC IRS2153 from International Rectifiers which has everything included inside one package for the required implementation..
Basically, the IC is a specialized half bridge mosfet driver unit having all the required safety parameters built-in, so that we don't have to bother about these while building a customized half-bridge inverter circuit.
As can be seen in the diagram, there's hardly anything complicated, it's just about integrating the mains input and an equivalently rated battery at the other side for implementing a hassle free 220V online UPS circuit which is solid state in design, noiseless, and transformerless.
The Rt and Ct are appropriately selected for achieving the required 50 or 60Hz frequency for the output load.
It may be done by using the following formula:
f = 1/1.453× Rt x Ct, where Ct will be in Farads, Rt in Hz, and f in Hz.
L1 may be selected with some experimentation so that the square wave harmonics can be controlled to some favorable extent.
Here, to avoid complication an automatic over charge cut off feature is not included, rather a trickle charge feature is opted for charging the battery. This may take a relatively longer time for the battery to get charged but the dangers of over charge is eliminated and reduced to safe levels.
The 1K 10 watt resistors determines the charging rate for the battery, optionally the battery could be charged through a suitable external charger circuit.
UPDATE:
Since a half bridge driver IC is used in the above design, the output will be a half wave output, meaning for a 310V DC input the output will be around 130V RMS, although the peaks will be still 310 V
To get get a full wave or a full 220V RMS, please replace the half bridge circuit with a full bridge driver IC circuit
Leave a Reply
14 Comments on "220V DC Inverter UPS Circuit"
Sir ineed an alternative ckt for h bridge invertor . So icant fint the above ic in the my area .
There is any alternative solution for make full bridge invertor with out the abaove ic
Naseef, you can try the following circuit
https://homemade-circuits.com/simplest-power-inverter-circuit-using/
Sir
The above ckt using 555 cannot give 150v DC input .
Ineed to get output 110v ac when input is 150 v
Hi Dilandki,
I don't think you can trick the UPS charger externally, the only way of solving this could be by bypassing the UPS charger and using only the BMS for charging the battery, or alternatively you can try identifying the low cut-off adjustment in the UPS board and set it to cut-off at 9V
Mr. Swagatam Majumdar
Please, i need some help. What values for RT, CT, LT and LR in diagram circuit?
I do not know much about electronics, so i need to know what the values of these components to carry out the project.
Can you help me, please.
Thank you.
Hello Amadeu,
Rt, Ct could be calculated through the formula presented in its datasheet, or you can find it by some trial and error also.
L is not compulsory you can replace it with a wire link….RL is your load which you would be connecting with the UPS
sir 7kw inverter digaram or 3hp/5hp ac sabmarsibal pump puc unit digaram send me.
or 5hp 3 phase motar driver direct solar
OK in that case you can try these two in a Darlington configuration and check the response….
But tip122 cannot use 300v like mje13003 that was why i asked rememba my circuit is Ac to Dc meaning 300vdc after rectification sugest d rite bjt 2use as a replacement 2d tip122
Ok. Can i use mje13003 in place of the tip122 and 2sc5296 in place of the tip35 in the circuit you suggested? I won't be paralleling just like u did in the circuit. Help!
mje13003 is entirely different from TIP122 so they cannot be interchanged,
2SC5296 might work in place of TIP35
you may refer to the following article for more info:
https://homemade-circuits.com/2014/10/upgrading-low-power-inverter-to-high.html