Schneider Electric Altivar 58 VW3-A58101 Instrukcja Użytkownika Pobierz pdf (Strona 40)

ALTIVAR



58 Keypad Display VVDED397047US R8/01

Chapter 2 — Menus 08/01

Mot.CosPhi

CoS

Motor CosPhi , motor power factor

Set the CoS parameter as provided on

the motor nameplate label.

If the power factor is not provided, or for

high performance applications, the

following procedure can be used to

optimize the motor power factor setting,

CoS.

0.5 to 1 depends on

drive

controller

rating

Operate the motor with no load at a frequency equal to nominal

frequency / 2. Then adjust the CoS parameter such that the

measured motor voltage equals nominal motor voltage / 2.

For example:

For a 460 Vac motor operating at 60 Hz,

adjust the CoS parameter to have 230 V at 30 Hz.

If motor voltage is less than 230 V, decrease CoS parameter.

If motor voltage is more than 230 V, increase the CoS parameter.

Auto Tuning

tUn

Initiates an autotune when the tUn

parameter is set to Yes. After the

autotune is complete, the display will

show “done”. No is displayed if the

autotune was not successful or

completed.

No - Yes No

No is also displayed if the motor rating is less than 25% of drive

controller I

rating or if multiple motors are connected. The CoS

parameter may need to be manually adjusted for optimum

performance.

This feature will not work if any logic inputs are activated. If

freewheel stop or fast stop are assigned to a logic input, they must

be in the high state to autotune.

When initiated, the drive controller pulses the connected motor,

measures, and stores specific motor stator resistance and

resistance of the conductors. This allows the drive controller to

provide better current regulation for better motor torque

performance. This can be initiated from the keypad display or by a

logic input assigned to this function.

Table 11: 3—Drive Menu Parameters (Continued)

Parameter Code Description

Adjustment

Range

Factory

Setting

[1]

Depending on the position of the 50/60 Hz switch. Ensure that the switch setting

matches the input frequency (see page 13).

[2]

= drive controller constant torque output current rating shown on the drive controller

nameplate.

[3]

The factory setting depends on the macro-configuration used: No for Material Handling,

Yes for General Use and Variable torque.

[4]

Refer to the drive controller instruction bulletin, VVDED397048US, for duty cycle ratings

of the drive controllers.

★ These parameters are available only with the I/O extension card installed.

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 111 112

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