Kb-electronics KBVF-23P Bedienungsanleitung PDF herunterladen (Seite 21)

It is recommended

that the drive be

used with Inverter Duty

or TENV motors.

Inverter duty and most

totally enclosed non-

ventilated (TENV) motors

can provide full rated

torque over an extended

speed range without

overheating. See Figure 5.

If external fan cooling is

provided, open ventilated

motors can also achieve

an extended speed range

at full rated torque. A box

fan or blower with a mini-

mum of 100 CFM is rec-

ommended. Mount the

fan or blower so the

motor is surrounded by

the airflow. See Figure 6.

Maximum Allowed

Motor Speed (%)

10 20

040

5030 807060 10090

100

Motor Torque (%)

TEFC and Open Ventilated Motors

and TENV Motors

Inverter Duty

Fan Cooled

FIGURE 5 – MAXIMUM ALLOWED MOTOR TORQUE VS. SPEED

Open Ventilated Motor

(100 CFM Min.)

Fan or Blower

Airflow

FIGURE 6 – OPEN VENTILATED MOTOR WITH EXTERNAL COOLING

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Kb-electronics KBVF-23P Bedienungsanleitung Seite 21