Effects of brownouts and power spikes on linear power supplies

[AEW]

What are the effects of brownouts and power spikes on linear power supplies in particular; e.g., a linear power supply that provides 24 V to an inductive angle encoder?

Thanks for any information you could provide.

 

[Baluncore]

What are the effects of brownouts and power spikes on linear power supplies in particular; e.g., a linear power supply that provides 24 V to an inductive angle encoder?

That depends on the voltage margin used in the design of the power supply. If brownouts are a problem, you will need to install an uninterruptible supply. "Power spikes" are not a physical problem, they are largely in the mind of the equipment operator. A switching supply can have greater voltage variation rejection, so should better resolve both of those problems.

Inductive angle encoders estimate the angle from ratiometric sine and cosine signals. The ratio should not be critically dependent on the reference amplitude. Inductive angle encoders are used because they are tolerant to large changes in reference amplitude. When an inductive system has problems, check for erratic sine and cosine signals with an X Y oscilloscope, looking for corroded connectors and broken wires.

 

[berkeman]

What are the effects of brownouts and power spikes on linear power supplies in particular; e.g., a linear power supply that provides 24 V to an inductive angle encoder?

Do you have a particular design you are working on? Or is this question maybe for schoolwork?

 

[AEW]

Do you have a particular design you are working on? Or is this question maybe for schoolwork?

It is an industrial application. I am investigating intermittent failures of the encoder, and speculating that its power supply is not reliable because of sporadic brownouts and/or voltage spikes possibly affecting the AC line during peak operation of a rotating machine (permanent magnet synchronous motor).

 

[berkeman]

What kind of failure of the encoder? Can you give a link to its datasheet? Thanks.

 

[AEW]

Encoder not powered/measuring anything. Here is the encoder https://www.celeramotion.com/ultra-incoder/ (at the bottom of the page). It transforms the 24 V from the linear power supply to 3.3 V before feeding the sensor electronic circuit.

 

[anorlunda]

It is an industrial application. I am investigating intermittent failures of the encoder, and speculating that its power supply is not reliable because of sporadic brownouts and/or voltage spikes possibly affecting the AC line during peak operation of a rotating machine (permanent magnet synchronous motor).

The synchronous motor should not cause spikes. If you're getting poor power quality (i.e. intermittent low voltage, and spikes) it is the power company's problem. You may be forced to install a power quality monitoring device to document it. But such a device may be a good investment for your company.

 

[berkeman]

Here is the encoder https://www.celeramotion.com/ultra-incoder/ (at the bottom of the page)

Wow, that is a great product! I'll have to think of some good applications for it.

Encoder not powered/measuring anything

Sorry, I'm not the sharpest tool in the shed, but this makes no sense. The angle encoder that you linked to is definitely powered, apparently with 3 different input voltage options:

It transforms the 24 V from the linear power supply to 3.3 V before feeding the sensor electronic circuit.

What's "it"?

In your OP you said that you suspected a problem with a power supply that converts AC Mains to 24Vdc, not 3.3V for your unpowered sensor...

a linear power supply that provides 24 V to an inductive angle encoder

I'll go back to my toolshed now...