Re: EV warrior controller MOSFET id.

[Rod.Hower@ametek.com]

I would be happy to reverse engineer this control.
I have LOTS of spare parts just laying around that are used in this type of
control.
For example, I asked Fairchild for some logic level 60V FETs in a D2PAK.
Instead of sending the 18 samples I asked for, they sent an entire reel
(that's 600 parts as a sample!!!!!!)
So, not only can I reverse engineer it, but probably make it better.

Rod
W8RNH



I would be happy to supply a new 1505 to one of the gurus to reverse
engineer. Maybe this control coudl be upgraded to higher current as well as
higher voltage? If anyoneis seroiusly interested, please email me.

Bill Griffin


----- Original Message -----
From: Rod.Hower@ametek.com
To: ev@listproc.sjsu.edu
Cc: ev@listproc.sjsu.edu ; owner-ev@listproc.sjsu.edu
Sent: Monday, July 30, 2001 7:40 AM
Subject: Re: EV warrior controller MOSFET id.


I disassembled one of their shunt controls for a golf cart and it had the
same markings.  I'm guessing they used the same part for volume discounts.
I believe IR marks these parts especially for Curtis.
Anyhow, the golf cart control was rated for 36V, so I came up
with what I thought would be a pretty close match
IRFZ44V
This is a 16.5mOhm FET with a 60V rating.
Not the best FET in its class, but certainly cost effective.
The capacitors however will definitely limit your input voltage.
The relay is probably used like a line contactor and is there more for
safety
although I guess it could also limit inrush current due to the bus caps.
Not Freewheel diodes?  I guess they use a couple of the FET for this since
they are required.
Maybe you could draw a rudimentary diagram of the power stage.

Rod
W8RNH



Someone said a while back that if we would open up one of the EV-warrior
controllers (Curtis 1505) they could tell us what the 'FETs are rated at.

It has 5 ea TO-220 packages with the following markings.

NE22
I#R 552K
08   53

The I#R is actually the International Rectifier logo, I use the # to
represent the diode symbol on the part.

I tried searching IR's website but had no luck finding this part.

FWIW in stock configuration this controller won't work(reliably) on packs
over 24V.  It uses 35V filter capacitors and it looks like it's using some
of the 'FETs as high-side switches.  I'm pretty sure this is the case for
two reasons; [1] the way the fets are wired up (two on one side and three
on
the other) and [2] there are no freewheel diodes.

One other thing, the controller has a built in relay.  This relay is also a
24V rated part.

You might be able to use them on 30V packs, but 36V looks like it's out of
the question.