Read the motor current by using the controller PXI-7350 and MID-7604

I use the PXI-7350 controller and MID-7604 drive to run a motor drive.  I would like to be able to measure the motor current while moving the engines.  This measurement is possible?  If so, what commands are required to read the motor current?

Hi Casey,.

the 7604 can limit the current to a value that is selectable by the user and you can activate the current reduction if the axis is stopped, but there is no way to read the current engine. If you want to measure the motor current, you must do it with an external device, but due to the current chopping and multiphase, motor control stepper motors is not a trivial task. Micro step mode the current phase looks like a rough sinus with lots of harmonics signal, so you will need to do a true measure requiring RMS of expensive measurement equipment.

Anyway. If you need to know the temperature of the motor you should better measure the temperature directly. The most inexpensive device OR do is the NI USB-TC01, but there are many other options available.

Kind regards

Jochen

Tags: NI Hardware

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