inverter transformers

[johnboy183]

Just a general question re the above. I have now accumulated quite a lot of powerboards and inverters and although its easy to scavenge most items from a board I cant find any logic to transformer numberings or markings ands none of them bring up any kind of datasheet or comaprison chart on Google. Has anyone looked into this to see if there is a comparison chart or a way of identifying output from the markings. I am sure most of the transformers I have are functional and to a large extent look physically similar especially in terms of their number and placing of pins but certainly wouldn't risk a substitution based on that. Any guru advice out there on this would be much appreciated.
Johnboy183

[pedro]

Re: inverter transformers

Just a general question re the above. I have now accumulated quite a lot of powerboards and inverters and although its easy to scavenge most items from a board I cant find any logic to transformer numberings or markings ands none of them bring up any kind of datasheet or comaprison chart on Google. Has anyone looked into this to see if there is a comparison chart or a way of identifying output from the markings. I am sure most of the transformers I have are functional and to a large extent look physically similar especially in terms of their number and placing of pins but certainly wouldn't risk a substitution based on that. Any guru advice out there on this would be much appreciated.
Johnboy183

There are enough differences in the configuration alone (winding arrangement, taps etc) that pulling them off boards for use as spares isn't practical. Also the turns ratio depends on the supply rail voltage to the primary switching transistors.

I must admit that although some repairers may have found failed inverter transformers, to date I haven't. Usually they are protected from failure by those fast acting semiconductor fuses we call transistors, or by the protection built into the PWM controller.

[PlainBill]

Re: inverter transformers

Just a general question re the above. I have now accumulated quite a lot of powerboards and inverters and although its easy to scavenge most items from a board I cant find any logic to transformer numberings or markings ands none of them bring up any kind of datasheet or comaprison chart on Google. Has anyone looked into this to see if there is a comparison chart or a way of identifying output from the markings. I am sure most of the transformers I have are functional and to a large extent look physically similar especially in terms of their number and placing of pins but certainly wouldn't risk a substitution based on that. Any guru advice out there on this would be much appreciated.
Johnboy183

The numbers on inverter transformers are generally some form of house numbers, possibly including a date code of production lot. For example, one Darfon inverter used transformers stamped with the number 4006A508019. Attempting to Google that was fruitless. After some research I found that this model of Darfon inverter had transformers that started with 4006A, followed by 6 additional numbers. And searching on 4006A led me to a source of the transformers.

To further confuse the issue, transformers with the same form factor were used on a number of Darfon inverters. In most cases, the difference between 4006A and 4009A are the number of turns in the primary or secondary. However, there are eBay sellers that claim all are interchangeable.

PlainBill