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to get the speed of motor measured

to get the speed of motor measured

to get the speed of motor measured


  hello, i would like to ask about how to get the speed of an induction motor of 5 kw(asynch)measured when this motor is connected to a dc generator.i would like to do this experement in my laboratory  ,so the very detailed electrical scheme and may be a live pictures of the components will help.hope helped
with regards

RE: to get the speed of motor measured

The two main methods are optical and magnetic.  For laboratory work optical may be best - typically these can use a small piece of self-adhesive reflective tape on the shaft or coupling, with a laser or optical sensor.  The systems are fairly cheap, accurate, easy to set up and have a large speed range.  For example see:

Complete units are available from with 4-20mA or 0-10V DC output proportional to speed, that can be hooked up to a datalogger.  They even include the reflective tape.

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