Sinewave inverter prototype...

[DeepOne]

can we use ir2110/2304 high side with 50hz square pwm and low side with sine pwm 37khz ?

yes, but result of this method is not be good.

 

[waqasjamil]

yes, but result of this method is not be good.

hi DeepOne
thanks for info. as you mention 1,1.2us deadtime require for +315v-220v... would be ir2110 deadtime adjust as require by changing in hardware ?(like bootstrap cap etc ). As many hv ciruit base on ir2110

 

[DeepOne]

In the most simple event you may reed this in fets datasheet, in source-drain diode reverse recovery time section. For example - reverse recovery time of 2SK3299 - 1,9uS, IRF740 - 0,37us.

would be ir2110 deadtime adjust

is not provided in this microcircuit.

 

[naseerak]

You may use IR2153 which is basically a PWM chip but can be used in BRIDGE mode with adjustable dead time.

 

[waqasjamil]

what's voltage across pb1 , pb2 in mega8 pwm ? i got 0.15mv don't no why ?

 

[DeepOne]

average value around 3V, but this depends on measuring instrument - better if used oscilloscope.
check supply voltage and voltage level on input pins (PD7,PC0,PC1,PC2,PB5)

 

[waqasjamil]

average value around 3V, but this depends on measuring instrument - better if used oscilloscope.
check supply voltage and voltage level on input pins (PD7,PC0,PC1,PC2,PB5)

i used digital oscilloscope but no good result no enough voltage to operate h-bridge drive

- - - Updated - - -

in proteus wave disapear after few sec.

 

[DeepOne]

wave disapear after few sec

connect PD7 and PC0 to Vss, ADC7 and PC2 to +5V for testing purpose.
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STM8S test version. Only with spwm, nothing more. 25W load test is ok.

 

[naseerak]

Great! More to expect........

 

[waqasjamil]

did you check wave form on motor load ?

 

[DeepOne]

yes, distortions is small

 

[waqasjamil]

yes, distortions is small

that great and what's about mega8 circuit hv waveform ?

 

[DeepOne]

what's about mega8 circuit hv waveform ?

if this mega8 scheme from last schemes waveform must be not bad.
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Full version of stm8 firmware, but without deep testing and smoothing corners. However this spwm converter pass 30 min testing with around 100W motor load.

 

[waqasjamil]

hi DeepOne ,
i appreciate your work. i hav Q would be use same scheme for atmel mega8 instead of stm8s?

 

[DeepOne]

Hi Waqasjamil. AtMega8 has no hardware pwm dead-time generation, so some scheme would not be used.

 

[waqasjamil]

Hi Waqasjamil. AtMega8 has no hardware pwm dead-time generation, so some scheme would not be used.

thanks !!! and when you give tutorial using MicroPic ?

 

[DeepOne]

may be - never

 

[waqasjamil]

ok and would be Atmega8 transformer version use for +315v?

 

[DeepOne]

I did not try so not entrust for this. Can be if contribute some improvements.. but this will much more simply with stm mcu.

 

[waqasjamil]

Dear DeepOne,
As stm mcu hardly available here ,so i have no option rather than atmel or pic and early i use your scheme mega8 dip version and it's awesome... i successfully run circuit on real hardware . now i try for +315v using ir2110 using same firmware