Delta 28-299A Instrucciones de operaciones descargar pdf (Pagina 32)

NOTE

AAC Adaptive Acceleration Control will control the load

according to the programmed profile. Start cur

rent will vary

according to the selected acceleration profile and the

programmed start time.

If replacin

g a motor connected to an MCD 500 programmed

for AAC Adaptive Control starting or stopping, or if the

tarter has been tested on a different motor prior to actual

installation, the starter will need to lea

rn the characteristics

of the new motor. The MCD 500 will automatically re-learn

the motor's characteri

stics if Par. 1-1 Motor Full Load Current

or Par. 1-12 Adaptive Control Gain is changed.

5.3.4 Kickstart

Kickstart provides a short boost of extra torque at the

beginning of a start, and can be used in conjunction with

current ramp or constant current starting.

Kickstart can be useful to help start loads that require high

breakaway torque but then accelerate easily (for example

flywheel loads such as presses).

700%

600%

500%

300%

100%

400%

200%

10% 20% 30% 40% 50%

Rotor speed (% full speed)

60% 70% 80% 90% 100%

177HA508.10

Current (% motor full load current)

1: Kickstart level (Par. 1-7)

2: Kickstart time (Par. 1-8)

3: Initial current (Par. 1-5)

4: Start ramp time (Par. 1-6)

5: Current limit (Par. 1-4)

6: Full voltage current

5.4 Stopping Modes

5.4.1 Coast to Stop

Coast to stop lets the motor slow at its natural rate, with no

control from the soft starter. The time required to stop will

depend on the type of load.

5.4.2 TVR Soft Stop

Timed voltage ramp reduces the voltage to the motor

gradually over a defined time. The load may continue to run

after the stop ramp is complete.

Timed voltage ramp stopping can be useful for applications

where the stop time needs to be extended, or to avoid

transients on generator set supplies.

70%

60%

50%

30%

10%

40%

Time

Voltage (% full voltage)

20%

80%

90%

100%

177HA509.10

1: Stop time (Par. 1-11)

5.4.3 AAC Adaptive Acceleration Control

To use AAC Adaptive Acceleration Control to control

stopping performance:

1. Select Adaptive Control from the Stop Mode menu

(Par. 1-10)

2. Set the desired Stop Time (Par. 1-11)

3. Select the required Adaptive Stop Profile (Par. 1-14)

Application Examples MCD 500 Operating Instruction

MG.17.K3.02 - VLT

is a registered Danfoss trademark 31

5 5

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