Lenze E82xVxxxKxxxxx - Manual (Page 507)

Application examples
Operation with mid−frequency motors
15
l
507 EDS82EV903 EN 3.0
15.2 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
ƒ If the motor is to be braked shortly, and with high moments of inertia, an external
brake resistor must be used. (
¶ 484)
ƒ 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 Name 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 ^ 205
C0016 V
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
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.