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???
08/30/09 06:38
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 		 #168610 - Reply to Vu Nhu Khanh
Responding to: ???'s previous message
Thanks for your reply.
I have asked for the same information and I am waiting for it.
I have seen the motor, but not the full assembly or the fitting. I have the information that it is just the motor without encoder. Looking at the size, the motor must be 1/2 hp, but definitely not more than 3/4hp. This motor is driven by a controller card, that has MOSFETS on it IRF840 and IRF740. They are specified for a max. current of 10Amps/8Amps. So I guess the motor has to be less than 3/4 hp.
Even then I have asked for a copy of the technical specs. of the motor, and I am still waiting for it for the last 10 days. The problem is the textile mill is far off, in very remote area, so it is taking a lot of time.

Anyways, Thanks for your post.


List of 29 messages in thread
TopicAuthorDate
AC Motor question            01/01/70 00:00      
   with these questions            01/01/70 00:00      
   More questions            01/01/70 00:00      
      not neccessarily            01/01/70 00:00      
         May be, but...            01/01/70 00:00      
            inverters have a potentiometer input            01/01/70 00:00      
   Replies to Erik and Daniel            01/01/70 00:00      
      go ahead and then cost it            01/01/70 00:00      
         Thanks Erik            01/01/70 00:00      
   Dear Suttar            01/01/70 00:00      
      STAY AWAY            01/01/70 00:00      
         It doesn't have to be so bad if you switch at zero crossing            01/01/70 00:00      
            and give tyhe AC motor every other cycle ????            01/01/70 00:00      
               No ... just turn it on and off at zero crossing            01/01/70 00:00      
                  it is an AC motor, details, details, detalis            01/01/70 00:00      
                     Horrible motor control            01/01/70 00:00      
                     Who said anything about removing cycles?            01/01/70 00:00      
                        on and off at zero crossing....            01/01/70 00:00      
                           and if you cut only half cycles ....            01/01/70 00:00      
                              Nope ... it just happens at power-on and power-off            01/01/70 00:00      
                                 that is NOT what this thread is about            01/01/70 00:00      
                           Only when you turn the motor on or off            01/01/70 00:00      
         To Erik,            01/01/70 00:00      
            Slip            01/01/70 00:00      
               "inverter certified" motors ...            01/01/70 00:00      
            Creating new sine wave at different frequency            01/01/70 00:00      
               Now I know why...            01/01/70 00:00      
            no, the frequency generated by the inverter            01/01/70 00:00      
      Reply to Vu Nhu Khanh            01/01/70 00:00      

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