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???
07/12/04 03:11
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#74016 - RE: direction sensing for AC supply & mo
Responding to: ???'s previous message
"1) direction of motor whether moving clock or anticlockwise. "

Use of a quadrature output encoder will be the easiest - but not the economical one. A reversed motor depending on the application can be harmful or simply wasting power without causing damage. I don't know about your case. In my field of hydraulics, most times I sense a pressure switch on the delivery of the pump and in case of a reversed motor, this switch fails to trigger and raise an alarm for user intervention. Likewise you can sense some secondary event that is the result of the motor direction and take action.

"2) direction of mains supply 220v ac current to load "

I think you referring to phase sequence in a three phase setup. As somebody suggested you can use zero cross detectors and arrive at the phase sequence or quite simply use one of the commercially available phase sequence relays. Saves lots of trouble -but if you are intent on learning the how-to of it, go ahead and experiment.

Raghu

List of 11 messages in thread
TopicAuthorDate
direction sensing for AC supply & motors            01/01/70 00:00      
   RE: direction sensing for AC supply & motors            01/01/70 00:00      
   RE: direction sensing for AC supply & motors            01/01/70 00:00      
   RE: direction sensing for AC supply & mo            01/01/70 00:00      
   RE: direction sensing for AC supply & motors            01/01/70 00:00      
      RE: *Alternating* current!            01/01/70 00:00      
         RE: *Alternating* current!            01/01/70 00:00      
            RE: Power            01/01/70 00:00      
   RE: direction sensing for AC supply & mo            01/01/70 00:00      
      RE: direction sensing for AC supply & mo            01/01/70 00:00      
         RE: direction sensing for AC supply & mo            01/01/70 00:00      

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