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Looking 4 Transformers
- Thread starter tecMec
- Start date
tecMec,
Transformers are AC-only devices. They do not transform DC.
I think what you are looking for is either a rectifer or power supply, a DC/DC converter or perhaps an inverter. No offence, but your post was a little unclear.
The 60V 220A DC - is this the supply you need for your data acquisition system? Are you trying to run it from the mains? Can you verify your figures - 220A is a lot of current for a data acq. system.
Post a bit more info and we can probably help.
-----------------------------------
Start each new day with a smile.
Get it over with.
Transformers are AC-only devices. They do not transform DC.
I think what you are looking for is either a rectifer or power supply, a DC/DC converter or perhaps an inverter. No offence, but your post was a little unclear.
The 60V 220A DC - is this the supply you need for your data acquisition system? Are you trying to run it from the mains? Can you verify your figures - 220A is a lot of current for a data acq. system.
Post a bit more info and we can probably help.
-----------------------------------
Start each new day with a smile.
Get it over with.
- Thread starter
- #3
tx for the reply,
my electrical knowledge is realy bad
anyway,
the data acquisition card cannot accept more than 10V
i would like to connect the data acquisition card to the main line, and measure the voltage and current. This can only be done if the signal is conditioned.
i have 48V DC system, (batteries)
and the current running in the main circuit is 200 Amps.
i have seen in some sites DC transducers, i hope they dont mean AC/DC tran. !
my electrical knowledge is realy bad
anyway,
the data acquisition card cannot accept more than 10V
i would like to connect the data acquisition card to the main line, and measure the voltage and current. This can only be done if the signal is conditioned.
i have 48V DC system, (batteries)
and the current running in the main circuit is 200 Amps.
i have seen in some sites DC transducers, i hope they dont mean AC/DC tran. !
So if I'm interpreting your requirement correctly, you want to measure a current of about 200A and connect the measuring transducer into your data acquisition system?
Have a look at the following website:
LEM have a large range of current sensors for measuring AC and DC currents. Robust, isolated, and fairly cheap. The site takes a bit of navigating, but in the "Products" pulldown list, select "Transducers / Sensors" and you are somewhere near where you need to be.
Hope this helps.
-----------------------------------
Start each new day with a smile.
Get it over with.
Have a look at the following website:
LEM have a large range of current sensors for measuring AC and DC currents. Robust, isolated, and fairly cheap. The site takes a bit of navigating, but in the "Products" pulldown list, select "Transducers / Sensors" and you are somewhere near where you need to be.
Hope this helps.
-----------------------------------
Start each new day with a smile.
Get it over with.
analogkid2digitalman
Electrical
tecMec-
Still unclear if you are trying to measure AC or DC, but:
For either AC or DC voltage:
You could use a voltage divider resistor network with appropriate scaling so that the max output is 10V for your maximum main line voltage. Input impedance of data acq (DAQ)cards are pretty high, >1M ohm, so loading effect of the divider may be minimal. Also suggest configuring card properly for you application (single ended, differential, referenced single ended). Read the manual to determine proper setting/wiring.
AC voltage only:
Step down transformer could be used, this would also provide isolation between your line and the DAQ card (see below)
AC or DC current:
1. Use an AC/DC clamp on current probe (i.e. Fluke) with proper current range, provides isolation.
2. Current shunt, no isolation.
AC current:
Toroidal current transformer, also provides isolation.
DC current:
Hall effect transducer, also provides isolation.
Ideally, I always prefer to use isolation (optical or galvanic) between the outside world and the DAQ card- safety and protection insurance (Analog Devices 5B series)
has a lot of resources and technical forums for more info.
Hope this is of assistance.
-Pete
Still unclear if you are trying to measure AC or DC, but:
For either AC or DC voltage:
You could use a voltage divider resistor network with appropriate scaling so that the max output is 10V for your maximum main line voltage. Input impedance of data acq (DAQ)cards are pretty high, >1M ohm, so loading effect of the divider may be minimal. Also suggest configuring card properly for you application (single ended, differential, referenced single ended). Read the manual to determine proper setting/wiring.
AC voltage only:
Step down transformer could be used, this would also provide isolation between your line and the DAQ card (see below)
AC or DC current:
1. Use an AC/DC clamp on current probe (i.e. Fluke) with proper current range, provides isolation.
2. Current shunt, no isolation.
AC current:
Toroidal current transformer, also provides isolation.
DC current:
Hall effect transducer, also provides isolation.
Ideally, I always prefer to use isolation (optical or galvanic) between the outside world and the DAQ card- safety and protection insurance (Analog Devices 5B series)
has a lot of resources and technical forums for more info.
Hope this is of assistance.
-Pete
analogkid2digitalman
Electrical
ScottyUK
Hey, thanks for that link, it's in my bookmarks now!
-Pete
Hey, thanks for that link, it's in my bookmarks now!
-Pete
- Thread starter
- #7
Thnx ScottyUK,
Yes u are interpretation is right.
i was looking for a tranducer not a transformer, [i dont know how i wrote that! i got it wrong in the first post ]
analogkid2digitalman
nothing is AC , every thing is DC (DC current DC voltage)
Thanx for your reply guys (^_^)
Yes u are interpretation is right.
i was looking for a tranducer not a transformer, [i dont know how i wrote that! i got it wrong in the first post
]analogkid2digitalman
nothing is AC , every thing is DC (DC current DC voltage)
Thanx for your reply guys (^_^)
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