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help with 1000w inverter

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janosandi

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hello Guys
im workin on 1000w inverter based on sg3524 circuit
the basic problem is when the inverter starts it has unstable volt & frequency For about 1 sec
any ideas ?

thx guys
John

Here is the circuit i use

 

Here we go again. Another s----- voltage mode control converter. Hasn't anyone heard of current mode control?
The SG3524 chip is ancient. I'd be surprised if it's still available.
 
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can u guide me plz to your new suggestion ?
 

I suggest you look up current mode controllers. Voltage mode controllers are practically obsolete, and for good reason.
 
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