Sinewave inverter prototype...

[naseerak]

But would you please explain the drive mechanism.

 

[DeepOne]

driving mechanism such as in previous version - one half of the bridge is works with spwm while other half has switched off upper fet and switched on lower fet . On following half-wave they are changed by places. Ok, program has mistake in switching mechanism (not unamendable) - because designed for different scheme. But for 6n137 hi-side and bjt lo-side drivers it may work correctly without changes in program.

 

[naseerak]

Did you check this last schematic in Hardware?

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And did the upper bootstrap section gets 50Hz H/L logic or 15Khz

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I think this is cheap and will work for 15khz SPWM

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Is this scheme better than IR2110 or any other dedicated chip based bridge.

 

[DeepOne]

Did you check this last schematic in Hardware?

only driver part with stm8 mcu

I think this is cheap and will work for 15khz SPWM

yes, it may work in 50Hz - 30KHz range

Is this scheme better than IR2110 or any other dedicated chip based bridge.

no, it is much worse then with IR2110, because power and hi-side driver signals are too bound.

 

[DeepOne]

next version with atmega8. not tested in hardware.

 

[naseerak]

What is the purpose of another winding in the trafo..

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and what guage of wire is used for this winding.

 

[DeepOne]

I think to try to use 20V winding of the transformer which is intended for battery charging.
That is thin, but may be sufficient for give the road to spared energy.

 

[naseerak]

Why the drains are short to each other.

 

[ALERTLINKS]

This will supress spikes generated. Note this channel has inverted input.

 

[DeepOne]

At the first sight last circuit work, with 20W ACIM load.

 

[naseerak]

A Huge dead band.

 

[DeepOne]

may be version with stm8 be better )

 

[DeepOne]

not much better (

 

[DeepOne]

also version with STM8. no load current - 1A.

 

[DeepOne]

version with attiny13

 

[DeepOne]

more powerful tiny13 )

 

[naseerak]

The extra 4 fets are for reverse battery protection, but what the logic level mosfet at the gates are doing.

 

[DeepOne]

logic level mosfet for switch off power fets.
circuit with corrected small mistake -

 

[DeepOne]

next project with STM8, not ready yet

 

[naseerak]

Why such a wide range 10-----24v supply, transformer also has to be changed.