COSMOS DRIVER SERIES 3000 - USE AND MAINTENANCE MANUAL
4.4 Thermal dissipation
The below graphics show the thermal dissipation, depending on the efficient output current. The four curves represent
four switching frequencies of the driver, respectively 4kHz, 8kHz, 12kHz, 16kHz starting from the continuous line.
Please consider that:
•
in case of variable output current, the average dissipated power must not be calculated by using the current
average value, but by integrating the instant dissipated power.
•
The dissipated power mostly depends on the driver switching frequency; in order to find intermediate values
between those indicated in the graphics, interpolate linearly.
•
The dissipated power on the braking resistors must be calculated separately.
•
The dissipated power scarcely depends on the power factor of the load, but mostly on the absolute value of
the output current; this is to say that the dissipated power is not strictly linked to the active power supplied to
the load.
Ver. 1.07
Pag. 19
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