Epsilon EP-I Indexing Drive and FM-2 Indexing Module Reference Manual

Power Dissipation Calculation

Calculating actual dissipation requirements in an application can help minimize enclosure cooling requirements, especially in multi-axis systems. To calculate dissipation in a specific application, use the following formula for each axis and then total them up. This formula is a generalization and will result in a conservative estimate for power losses.

TPL =

TRMS • Vmax

+ Pld + Psr

1500

 

 

Where:

TPL = Total power losses (Watts)

TRMS = RMS torque for the application (lb-in) Vmax = Maximum motor speed in application (RPM) Pld = Logic Power Losses Drive (Watts)

Psr = Shunt Regulation Losses (Watts)-(RSR-2 losses or equivalent)

Note

TRMS * Vmax / 1500 = Power Stage Dissipation = Pp

A more accurate calculation would include even more specifics such as actual torque delivered at each speed plus actual shunt regulator usage. For help in calculating these, please contact the Application Department at Control Techniques with your system profiles and loads.

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Emerson P/N 400518-02 manual Power Dissipation Calculation, Tpl =