Emerson LPS-10x-M Alternatives

Tim Wescott · 2013-04-09T22:37:22+00:00

So, I'm working on a motor drive board for a customer. Due to a desire for performance improvements within the existing space, we're going from the traditionally-accepted brute-force power supply to a switcher. I have this nice board and software set that's carefully designed to treat the power supply with kid gloves -- and it works very well with the power supply that we used for prototyping. But for space reasons they went out and found what appears to be the smallest possible power supply with the apparent specifications needed (24V and 10A): It's not that this power supply sucks, per se. It's just that things that work just fine with the original supply (A TDK/Lambda SWS300-24) make the Emerson supply either exceedingly unhappy or downright dead. Worse, I'm not sure what's taking out the power supplies. So -- Does anyone have any mileage with these Emerson supplies? After I told the customer "why yes, that should do" I began to notice the name "Emerson" on this group, and the view of their stuff seems to be pretty dim. I'd like to know if you feel these are OK, or comprehensively bad, or what. Also, I've carefully designed things so that any time the motor is generating the power goes into a resistor and not into raising the motor supply rail (and thus backfeeding the supply). But I did notice that doing so kills one of these Emerson supplies (the TDK supply mostly takes it in stride, or if you're really egregious about things it turns off until you cycle power). Do you know of anything else that would kill one of these supplies? While I've eliminated the backfeeding problem, the board still has a current draw that can vary from a few tens of milliamps to ten amps over the space of less than a second -- if it would make the supply happier I can change this so that whenever the motor is turning the board is always drawing some minimum power. Efficiency will suffer -- but we're not after efficiency, we're after performance in a...

Apr 09, 2013 22 Replies

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Jim Thompson 13 years ago

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What can you say... John "snarky demented NOLA white trash" Larkin always responds that way. One of Slowman's "peers" >:-} ...Jim Thompson

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John Larkin 13 years ago

the

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I want to see Thompson do it. He sometimes does hilarious stuff when he goes off-chip.

John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators

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John Larkin 13 years ago

I suppose Thompson has dried up on ideas, so consider this:

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John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation

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