OT a bit - Why is DC Better for this Application

Jan 21, 2006 4 Replies
B

In google search to answer that question, the most discussion about DC motors was on this site. Here is the DC motor question - I sell to the healthcare market, have got a new line from a manufacturer which is powered by 4 DC motors - basically a bed that contorts into many different positions.



The "cheap" brands use 3 or 4 AC motors - the better use DC motors. There must be a reason why the higher priced units use DC. The manufacturer did not answer that question - they presume sales types don't care about such things - but somebody will ask and DUH is not the answer I want to give.



THanks - and I am not a troll -will be out next week selling these things.



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L

Butch,

Speed and torque control are much better, and, assuming they are running on

12 or 24 volts, it's not likely the patient will be electrocuted should a circuit become shorted to the frame or the controller be handled with wet hands.

Dave

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B

Thanks much - interesting to note all nursing home beds are AC vs almost all hospital being DC - more money for law suits at hospitals I guess. These are 24 volt units.

Thanks again.

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L

Butch,

You have it backwards, the hospitals don't have money for lawsuits so they spend a little extra for DC beds, don't need to do the staff in either!!!

Dave

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B

What I meant was they have more money and that is why lawyers are more apt to sue - can't get blood from a turnip.

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