AS I know These are oscillator circuits available to convert 12 Volt constant DC to 220 Volt AC. but we can achieve these using opamp also right. opamp or transistor or any other oscillator circuit for converting constant dc to pulsating dc but why always people prefer mosfet or igbt aka (hbridge inverter switch) for doing that oscillating process.can anyone clearly explain me. even all inverter based on unipolar switching it also generated or achieved by op amp 741 or op281 for generating two sine wave 180 out of phase and using another op741 to generate ramp signal so that we will get dsp type of sampling from ac wave we also find zvs so that we can know at what point 1-4 should trigger and what point 2-3 should trigger(negative pluse)so againg coming to question all these can achived using opamp ,even filter (active low pass filter aka butterworth filter) using that we can filter 1hz to 1mhz noise even size of filter design also low but why always people prefer hbridge it contains lot of loss regarding conduction and switchind then going for passive filter why?????????please explain this concept to me>.............. even for generating gate pulse also like 555 timer inside opamp is there it act as multi vibrator to produce pulse..so why know one is using op amp as oscillating circuit instead of inverter.
Inverters are used to provide power . Yes with OPAMP you can create Sine waves , but at what power ? In Inverter DC Voltage ( 310V - for 220V Sine : and rated current Power) is switched in PWM or other alogorithms to create sinusoidal current at output of bridge. Sine require +Ve and -Ve peak. and hence you will require bridge 4 IGBT/MOS devices.
If you use Transformer to step up Sine wave produced by amplifiers say 15V Peak to Peak How much current flow required through OPAMP and How you will balance VI at input and VI at output ?
Thanks for your reply but sir all opamp are low voltage and current rating are available I agree to the point but can you explain me one thing why op amp not able to produce or design in such manner to get higher current and voltage rating like you said vi characteristics ,why leading company not providing or designing opamp at high vi characteristics what is the reason?? Behind that...but it also act as oscillating circuit right?just explain me sir!
But inverter is just oscillating circuit to convert constant dc to pulsating dc that's all after adding filter only you will get ac but my question instead of this oscillating circuit can we use another like transistor based or op amp based that's my question ?and why high voltage and current rating op amp is not available why....
LT1210 is an op amp which produce 2AMP OUTPUT CURRENT VOLTAGE 15V IAM USING THAT AS FILTER SO I WILL GET UNITY GAIN OUTPUT FROM INVERTER I/P 12V OUTPUT 12V 1PER TOLERANCE AFTER USING TRANSFORMER 12V TO 230 2 AMP STEP UP TRANSFORMER I WILL GET 460W THIS IS MY POWER BUT HEAR DONT USE INVERTER USE OP AMP AS OSCILLATING CIRCUIT SAME RESULT WILL COME RIGHT?
Normally OPAMP were desined for Control and signalling operation for Transducers Voltage or Current amplification. Analog/Audio electronics. Not for Power .
Any Semiconductor expert only can explain why POWER OPAMP in KW /MW not designed? And everyone like low cost solution
http://www.electronics-tutorials.ws/oscillator/wien_bridge.html
My dear, dc to ac inverter is a device that changes dc voltage to ac voltage, irrespective of the components used to realize it. What you have described is also an inverter but to achieve power inverter, a lot of factors are considered in selecting the appropriate circuit components. Here are answers to the questions to asked:
(i) IGBT/MOS devices are preferred as switching components because they dissipate less power. Switching components are in series with the source and therefore if a high 'ON RESISTANCE' or potential dropping device is used, it will lead to high loss of power. For instance, consider using a MOSFET of Ron = 0.04 ohm and another device of Ron = 0.2 ohm as the switching device of a 2000 W 24Vdc/220Vac inverter, the current passing through the switching device at full load will be approximately 83A. This will produce a power loss of 276W with the MOSFET and 1,378W with the other device.
(ii) A transformer is a passive device and therefore can not be used to amplify power. If you use an op.amp or any other components to realize say a 20W inverter, you can only use a transformer to increase the output voltage but not the power.
(iii) A dc to pulsating dc device is not an inverter but a dc to dc converter.
NOTE: If you are currently working on inverter, go for EG8010 + IR2110S device with IGBT/MOSFET to achieve pure sine wave inverter without much stress, see the attached file.