Sharp CP-SR421 Instrukcja Użytkownika Pobierz pdf (Strona 335)

15. USING A DIRECT DRIVE MOTOR

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15.4.2 Power supply capacity and generated loss

Table 15.1 indicates servo amplifiers' power supply capacities and losses generated under rated load. For

thermal design of an enclosed type cabinet, use the values in the table in consideration for the worst

operating conditions. The actual amount of generated heat will be intermediate between values at rated

torque and servo-off according to the duty used during operation. When the servo motor is run at less than

the rated speed, the power supply capacity will be smaller than the value in the table, but the servo

amplifier's generated heat will not change.

Table 15.1 Power supply capacity and generated loss per direct drive motor at rated output

Servo amplifier-generated heat [W]

Servo motor

Power supply

capacity [kVA]

At rated output With servo-off

Area required for heat

dissipation [m

]

TM-RFM002C20 0.25 25 15 0.5

TM-RFM004C20 0.38 35 15 0.7

TM-RFM006C20 0.53 40 15 0.8

TM-RFM006E20 0.46 40 15 0.8

TM-RFM012E20 0.81 50 15 1.0

TM-RFM018E20 1.3 50 15 1.0

TM-RFM012G20 0.71 50 15 1.0

TM-RFM048G20 2.7 90 20 1.8

TM-RFM072G20 3.8 110 20 2.2

TM-RFM040J10 1.2 50 15 1.0

TM-RFM120J10 3.4 90 20 1.8

TM-RFM240J10 6.6 160 25 3.2

15.4.3 Dynamic brake characteristics

POINT

Do not use dynamic brake to stop in a normal operation as it is the function to

stop in emergency.

For a machine operating at the recommended load to motor inertia ratio or less,

the estimated number of usage times of the dynamic brake is 1000 times while

the machine decelerates from the rated speed to a stop once in 10 minutes.

Be sure to enable EM1 (Forced stop 1) after the direct drive motor stops when

using EM1 (Forced stop 1) frequently in other than emergency.

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