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To calculate the power input needed for a rotary motor use the following equation. Note you must do this for continuous and peak for servo motors (See graph below).
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To calculate the power input needed for a linear motor use the following equation. Note you must do this for continuous and peak for servo motors (See graph below).
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If you are sizing a DC system, your work is nearly done. You have calculated the amount of continuous and peak power that your drive will require. To get the current for which the fuse must be sized for use the following equation.
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Where P is the power calculated above and V is the DC voltage supplied to the drive. IT IS IMPORTANT TO SIZE A FUSE WITH A CURRENT RATING HIGHER THAN THE PEAK CURRENT REQUIREMENT.
Note: The points of the torque/speed curve that are circled are the maximum power points for a servo motor.
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