Simulation of industrial environments

[nodee]

Hi all,

I'm trying to simulate a voltage source that represents a typical industrial environment, specifically, 24Vdc with transients and spikes added to simulate motors and drives switching.

I know it is going to vary from application to application but is there something I could simulate that would represent 90% of applications? i.e. a spike of +50% Vdc for 1ms every 20ms.

Thanks,
nodee

 

[D.A.(Tony)Stewart]

Noise is either conducted or radiated. Radiated is magnetically induced at LF and capacitively coupled for E fields. There are also standards for ESD interference from human finger std. and moving cart as well as plane wave impulse radiation tests.

There are many Corporate standard EMI tests and Industry standard tests for Immunity and Susceptibility (IEC). I suggest you read up on them.

In the meantime, consider a cheap DIY noise generator with small 12V battery and a 12Vdc Power Relay with NO suppression diodes using Normally Closed contacts to open coil and buzz when powered up. With an antenna loop for the current to simulate large motor noise you can check for interference, induced noise in the ~500Hz rep rate but broad spectrum. Since this will be a matter of low current <100mA but high voltage ( few kV arc) , unlike large brush motors or arc welders but high dI/dt and dv/dt you can use this for near field interference tests to cover the broad spectrum.