178
System Manual – MOVIDRIVE® compact Drive Inverters
3
Operating modes
Parameters
CFC
CFC (only with MCV, MCH) in parameter set 1 only.
The CFC operating mode allows for operating an asynchronous motor with real servo
properties, which means high dynamic response, excellent concentric running charac-
teristics and controlled operation even at standstill. It is achieved because the CFC pro-
cedure enables direct control over the magnetic flux in the motor and, therefore, over
the torque. Speed feedback via encoder is mandatory for this operating mode. The fol-
lowing encoders can be used:
•
Hiperface
®
encoder
•
TTL sensors with negated tracks, encoders with signal level to RS422
•
High-resolution incremental encoder with sine shaped tracks AC 1 V
SS
SEW-EURODRIVE recommends high-resolution incremental encoders with a PPR
count of 1024. Optimum control characteristics are achieved with these encoders.
P324 Slip compensation 1, P321 Boost 1 and P322 IxR compensation are ineffective.
The SHELL startup function requires the motor type to be entered (SEW motor). Startup
cannot be performed with the DBG11B keypad in CFC mode. The following parameters
are preset (parameter set 1):
CFC always requires to startup the speed controller.
Setting the parameter P820 4-quadrant operation 1 will be ignored; 4-quadrant opera-
tion is always active.
Settings after the startup function
I
max
(inverter) = 150 % I
motor
Depends on number of poles and rated motor frequency
e. g. 2 pole / 50 Hz -> 3000 1/min
e. g. 4 pole / 60 Hz -> 1800 1/min
0 1/min
MOTOR & REGENERATIVE
0.1 s
UNIPOL./FIX.SETPOINT
TERMINALS
ON
Setting in accordance with specified motor data
Setting in accordance with specified motor data
Settings after the startup function of the speed controller
Setting in accordance with specified data
P201 Time constant n-controller
P202 Gain acceleration feedforward
P204 Filter speed actual value
P203 Filter acceleration feedforward
Position controller gain for the hold control function
Position controller gain for IPOS
plus®
(positioning mode)
Setting in accordance with specified data
P6..
P60.
P600
Summary of Contents for MOVIDRIVE compact MCH41A
Page 2: ...SEW EURODRIVE Driving the world...
Page 432: ......