This datasheet contains final specifications. Fairchild. Semiconductor reserves the right to make changes at any time without notice in order to improve design. IRFS Specifications. alldatasheet, free, Datasheets, databook. IRFS data sheet, Manual, IRFS parts, chips, ic, Electronic Components. application. IRFS from Samsung Semiconductor Division. Find the PDF Datasheet, Specifications and Distributor Information.

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So i KNOW that the coils and exciter are working. Mostly because i forgot to order them.

You might put a reverse biased diode across the BJT base-emitter terminals to avoid any collector-base voltage greater than 10V D2 zenner then any regular small signal BJT could do the job you don’t need a V rated one. May 1, 2 0. What do you mean by inductor? I will, however, check the sampling voltage and rotor slip ring voltage against load next.

I really don’t think the AVR is regulating properly though, at 1kw the output voltage is dropping to a bit below vac and 2kw vac. Sep 3, 5 0. IRF should work though the Id rating is only 10Amps. I’ve redrawn the schematics to better understand the circuit topology. Jun 26, Load Output Sample Rotor irfs64 kw vac datasheft The PWM signal is generated by permanently connecting the Mosfet gate to the Vcc bus through that current limiting orfs640 and by the BJT, which is shunting to ground the Mosfet gate whenever the feedback voltage is greater than the preset threshold VR1.


I read somewhere about re-magnetizing the exciter with 12V, So i did. I do some checking, and the Darlington I put in was sorted, as was one of the BJt’s again. Generator Automatic Voltage Regulator Posted by debe in forum: Discussion in ‘ The Projects Forum ‘ started by dmechanicJan 14, That way, you could switch the Mosfet way more efficient, use a much higher switching frequency and have a better output voltage regulation.

Yes, I was talking about rotor winding.

For now, I’ll try this emergency solution as I need to use the generator this weekend. After check datasheet dataeheet 2n, frequency is very low Transition Frequency ft: Jan 30, 13 4. Back to no power.

IRFS_PDF Datasheet Download IC-ON-LINE

Jul 17, Mar 27, The BJT and the Darlington transistor were toast. In this case what IS the role of C2 R2 between bjt base and negative brush? I calculate about 5. So I opted to replace them. I Jumped the 12v across the exciter brushes and got 30vac momentarily at the power outlets.

As you can see, it’s basically a buck converter where the output inductor acts as a load, too. So I bough virtually all the components to rebuild the entire board based on the schematic on pg1 as well as the some recommendations for a different Varistor at S2.


IRFS Datasheet pdf – V N-Channel MOSFET – Fairchild Semiconductor

Mar 4, I jumped across the brushes and voila power, only it was volts Jun 25, Stupid question but i want to understand. No, create an account now. After they were in, still nothing. Your name or email address: Can i use mosfet irf to replace irfs Automatic Voltage Regulator Posted by preye in forum: And a 2n to replace 2n Jul 3, 11 0. Now I am getting like 2VAC at the outlets.

Yes, my password is: Automatic Voltage Regulator Posted by Dumken in datasheet Rotor winding or feed winding?

IRFS640 – 200V N-Channel B-FET / Substitute of IRF640 & IRF640A 200V N-Channel MOSFET

Quote of the day. Jul 19, Oct 24, Aug 17, datsaheet 1. It is actually the Datxsheet “load”. While they do appear to be okay on the outside, with a minimal mark on one of them, they all test OK and are within range for their values.

The only components I hadn’t replaced were the resistors at R and R5. The motor also appears to be struggling at 2kw even though It is a 6. I just can’t get the darn AVR thing right.