250VDC Supply reduced to 24VDC motor
250VDC Supply reduced to 24VDC motor
(OP)
I have an application where I am replacing a 250VDC reversable motor with 24VDC reversable motor. I need an efficient way to reduce the voltage to the motor. Would I just use a DC-DC converter rated for the motor FLA? This would need to be up the line from the customers controls to reverse the motor. Is there a way to do it between the controller and motor without having to supply two converters? Note the FLA on the motor is only 7 amps but the LRA is about 50 amps. These motors do see a starting current of about 50 amps when started under a load.
Any help is greatly appreciated.
Any help is greatly appreciated.





RE: 250VDC Supply reduced to 24VDC motor
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RE: 250VDC Supply reduced to 24VDC motor
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I don't suffer from insanity. I enjoy it...
RE: 250VDC Supply reduced to 24VDC motor
You are going to find out that it would be far cheaper to stay with the original motor.. Just get it rebuilt!
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: 250VDC Supply reduced to 24VDC motor
The idea of using a DC/DC converter does not work. Those I know about do not accept reverse polarity (which is what it will see if you connect it in the motor leads). And if it existed (a bridge rectifier front end), it will not change output polarity when input is changed.
Gunnar Englund
www.gke.org
RE: 250VDC Supply reduced to 24VDC motor
Were the currents quoted for the existing 250V motor or for the proposed 24V motor? It wasn't clear to me. I doubt the economics of a 700A 24V supply are going to make sense. There is going to be a lot of copper!
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I don't suffer from insanity. I enjoy it...
RE: 250VDC Supply reduced to 24VDC motor
I do appreciate all the help.
Best Regards,
Roger
RE: 250VDC Supply reduced to 24VDC motor
There are a lot of savvy motor people here. If you come back with specs I'm sure someone will point you in the right direction pretty quickly.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com