KEB COMBIVERT F5, Справочное руководство, Страница: 142 / 349

142
LM - Motor Data Parameters
The rated motor speed in rpm, according to nameplate.
For an Induction Motor you may NOT enter the motor-synchronous speed
(e.g. 1200 rpm for a 6 pole, 60Hz motor) Rated Motor Speed = Synchronous
Speed - Slip Speed. Ask the motor manufacturer for the motor rated speed.
When the following synchronous speeds are entered, a warning message
will be displayed to the user, “Warning: Value entered appears to be
synchronous motor speed; for an induction motor the rated motor speed
will be less due to slip!”
60 Hz, 6-pole: 1200 rpm
60 Hz, 4-pole: 1800 rpm
60 Hz, 2-pole: 3600 rpm
50 Hz, 6-pole: 1000 rpm
50 Hz, 4-pole: 1500 rpm
50 Hz, 2-pole: 3000 rpm
If y ou cannot find it on the name plate, use the following example to estimate
the rated speed.
Example:
If the nameplate reads 1200 rpm (synchronous speed) then the value
that should be entered must be lower. For starting purposes, one can
estimate the slip at about 2.9%. Then through running the elevator it is
possible to determine whether further adjustments are necessary. 2.9%
of 1200 is 35 rpm. To begin with, use the value 1200 - 35 = 1165 rpm which
is the default value.
Valid Adjustment Range for 60Hz motors:
From this parameter along with the LM04 Motor Frequency, the F5 Elevator
Drive calculates the number of motor poles. As a result there are limits as to
how low the value can be adjusted for a motor with a certain number of poles.
The following shows the valid adjustment range of 60Hz motors.
• 4 poles: 1201...1799 rpm
• 6 poles: 901.....1199 rpm
• 8 poles: 721.... ..899 rpm
• 10 poles: 601.... ..719 rpm
For PM Synchronous Motors, the relationship between the rated motor speed,
rated motor frequency and the number of motor poles
MUST NOT include
any slip.
LM02
Motor Speed
i
