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  1. AT1000

    retrofitting electric motor

    Hope someone out there can point me in the right direction. At the moment there is an old ac variable speed motor (with the moving brush gear to vary the speed)It needs to be updated to 3ph squirrel cage motor with an inverter. variable speed motor is 33 h.p. 25oo r.p.m. at top speed. Need to...
  2. AT1000

    Can anyone suggest some good on lin

    Can anyone suggest some good on line training sites dealing with servo and variable frequency drives? What I'm after is sites that can be understood from a practical point of view. thanks at1000
  3. AT1000

    How to check Motor Encoder

    Hello I understand what problems you are having as I work in a servo motor repair shop and get all makes of motor. Siemens, Fanuc, Indramat,Control Techniques to name just a few and by far the worst for information is Yaskawa because they simply do not give anything but new or repair in Germany...
  4. AT1000

    losses in permanent magnet DC Brush motors

    hello I work as a servo engineer in a motor and drive repair shop. though most are ac servos the d.c. motors that come in for rewind or overhaul using ferrite magnets must all be re-magnetised on special wound formers we have made otherwise the speed and torque are all over the place.why not put...
  5. AT1000

    variable speed drives

    can you explain in general terms, say for the eurotherm 690 ac drive the functions required to control the drive output from an outside source 0-10 volts and how to use the digital outputs when the drive is enabled. AS you can see I'm new to the use of ac drives but have installed quite a few as...
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