Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Manual do Utilizador descarregar pdf (Página 10)

1-2

STC Starting Torque Controller

Modes of Operation

Across-the-Line Response

Excessive motor starting torque can damage the motor and driv

equipment. Figure 1.2 illustrates the torque developed in a typical

across-the-line start.

Figure 1.2 Torque Developed in a Typical Across-the-Line Start

STC Controller Response

The STC controller reduces the magnitude of starting torque surges as

illustrated in Figure 1.3. This limits the starting shock to the motor

and drive

train.

Figure 1.3 STC Controller Respons

Across-the-Line Response Versus STC Controller Response

Figure 1.4 compares a typical across-the-line start response and the

STC controller response.

Figure 1.4 Across-the-Line Response Versus STC Controller Response

10

75

50

25

0

-25

-50

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

Time (sec.)

Torque

NM

10

75

50

25

0

-25

-50

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

Time (sec.)

Torqu

NM

100

75

50

25

0

-25

-50

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

Time (sec.)

Torque

NM

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 201 202

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