De-sta-co F5-B AC Inverter Drive Manuel d'utilisateur télécharger pdf (Page 41)

* Braking time depends on the actual frequency.

Adjustment range: 0...9

Resolution: 1

Factory setting: 1

Note: Enter-Parameter

DC-braking Mode

During DC-braking, the motor is not decelerated by a controlled ramp.

Quick braking without regen voltage can be achieved by applying a DC

voltage to the motor winding. Parameter values listed on the next page,

determine how the DC-braking is triggered.

Value DC-Braking Activation

0 Deactivated

1 Activates when direction signal is removed and the output

frequency has reached 0Hz. The braking time is dependent on

CP.21 or until the next direction of rotation.

2* Activates as soon as the direction signal is removed.

3* Activates as soon as the direction signal is removed or changed.

4* Activates as soon as the direction signal is removed and if the

real frequency goes below 4 Hz.

5* Activates when the real frequency goes below 4 Hz.

6* Activates as soon as the set value goes below 4 Hz.

7 Reserved - No Function

8 Reserved - No Function

9 Activates before the acceleration ramp when a direction signal

is given. The time is dependent on CP.21.

If the supply voltage drops to190 V and CP.17=230 V, the inverter will still

provide rated voltage to the motor up until 190V. The output voltage can

not be increased further beyond the input therefore the motor will operate

in field weakening. To calculate at which frequency this will occur use the

following formula:

f = (60Hz/ 230 V)*190 V= 50 Hz

CP.17 = 230V V

supply

= 190V

* Both scenarios above, it is assumed no boost (CP.6=0%).

Adjustment of the Drive

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 55 56

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De-sta-co F5-B AC Inverter Drive Manuel d'utilisateur Page 41