Lenze EVF9383 - Manual (Page 143)

Adjusting the motor
Entry of motor data
6.6
6.6.1
l
6.6−3 EDSVF9383V EN 7.1−04/2012
By selecting the motor in C0086 all required motor data are automatically
entered into the following codes.
Code Description Code Description
C0022 Limit current for operation in motor mode C0087 Rated motor speed
C0023 Limit current for operation in generator
mode C0088 Rated motor current
C0081 Rated motor power C0089 Rated motor frequency
C0082 Motor rotor resistance C0090 Rated motor voltage
C0084 Motor stator resistance C0091 Power factor cos j
C0085 Motor leakage inductance C0092 Motor stator inductance
1. Select a similar motor in C0086.
– Selection criteria: Connection method, rated motor power, rated
motor frequency
2. Enter the motor data of the motor nameplate or data sheet into C0081,
C0087, C0088, C0089, C0090 and C0091.
By changing from star to delta connection and changing the base frequency
(f
base
= 87 Hz), the induction machine (f
N
= 50 Hz) develops Ǡ three times the
power with a frequency of 87 Hz. In the total range the machine runs with
a
Ǡ 3 times higher delta current, which must be provided by the controller.
Example
A motor with the following data is to be connected in delta connection:
ƒ DSM 50 Hz;
D/Y 230/400 V; 18.5 kW; 62/35 A, 1450 min −1 , cos
j = 0.88
Sequence Note
1. Enter C0086 = 263
(DXRAXX 180−12−87; 32.4 kW;
87 Hz)
Select a motor in C0086, which has a
Ǡ
3 times
higher rated motor power with delta connection.
2. Enter C0087 = 2548 min −1 Consider the slip speed. With a rated motor torque
the slip speed of an asynchronous motor is nearly
constant over the total speed range.
Calculation of the rated motor speed:
C0087 + ( 3
Ǹ
* 1) @ n
0
) n
N
C0087 + ( 3
Ǹ
* 1) @ 1500 min *1 ) 1450 min *1
n
0
= synchronous speed
n
N
= rated motor speed at 50 Hz
3. Enter C0088 = 62 A Rated motor current for delta connection
4. Enter C0090 = 400 V Rated motor voltage for star connection
5. Enter C0089 = 87 Hz Rated motor frequency
6. Enter C0091 = 0.88 Power factor cos j
Lenze motor which is included
in C0086
Motor of another
manufacturer or a Lenze
motor which is not included in
C0086
Operating mode "87 Hz delta
connection"