Re: [CAD_CAM_EDM_DRO] Transformer size

Depends on what servo drives you are going to use. If you go with Geckos they are limited to 80 volts. A power supply with an AC secondary of close to 55 volts AC. When you run it through a 100 volt 30 amp bridge rectifier which changes it to DC it will be about 77 volts DC due to the RMS. Which is 1.416 X AC secondary output = DC current to Capacitors. Running a 90 volt DC servo on 77 volts will result in a proportional loss of speed but not any torque providing your power supply can provide the continuous amp rating of the servo. Which they rarely require.

Ron

dhaddox1 <dhaddox1@...> wrote:



My servo motors are 90vdc. What secondary voltage do i need before
rectifier/capacitor?
Dave








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