Application examples
Operation with medium−frequency motors
13−9
l
EDB82MV752 EN 5.2
13.2 Operation with mid−frequency motors
Mid−frequency asynchronous motors are used where high and adjustable speeds are required.
Possible applications are milling cutters for wood working machines, fans, vacuum pumps, concrete
vibrators, grinding and polishing drives.
Dimensioning notes
If the motor is to be braked shortly, and with high moments of inertia, an external brake
resistor must be used.
( 11−1)
Set the speed setting range so that motors with integral fan are always cooled sufficiently
(setting range as a function of load)
Application−specific configuration
Code Designation Setting Comment
C0011 max. output frequency Set to the value given on the motor nameplate, not higher than 400 Hz.
C0012 Acceleration time − main
setpoint
Set it so that acceleration takes place below the current limitation.
C0013 Deceleration time main
setpoint
Set it so that braking is possible with or without external brake without the
"overvoltage (OU)" message being displayed.
C0014 Operating mode −2− Linear characteristic (best operational performance for mid−frequency motors)
C0015 V/f rated frequency 7−5
C0016 U
min
boost Setting depends on the load at low frequencies.
Recommendation: 0 %
C0018 Switching frequency −3− 16 kHz (good concentricity with only 16 kHz)
Observe power reduction 3−5
C0021 Slip compensation 0 % Normally not required.
C0022 I
max
limit in motor mode Set to rated motor current.
At short acceleration times and high moments of inertia to 150 %.
C0023 I
max
limit in generator mode 150 % Lenze setting
C0106 Hold time for DCB 0 s DC injection brake must be deactivated!
C0144 Switching frequency reduction −0− No reduction.
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