Screen page "Motor" asynchronous
All the parameters that appear on this screen page are defined by the motor
default values (internal database in the amplifier), and in most cases
it will not be necessary to alter them.
Motor Type
ASCII: MTYPE |
Default:1 |
valid for all OPMODES |
This parameter is used to distinguish between synchronous (MTYPE = 1) and
asynchronous motors (MTYPE = 3). If synchronous is selected, then this
screen page will appear in a different layout . Change this only while the amplifier is
disabled.
No. of poles
ASCII: MPOLES |
Default: 6 |
valid for all OPMODES |
The current setpoint can be set for the operation of 2- to 256-pole motors.
Change this only while the amplifier is disabled.
Io
ASCII: MICONT |
Default: standstill current |
valid for all OPMODES |
The standstill current is the r.m.s. current value that the motor requires
at standstill to produce the standstill torque (defines the maximum value
for the entry of Irms in the current controller).
Iomax
ASCII: MIPEAK |
Default: peak current |
valid for all OPMODES |
The peak current (r.m.s. value) should not exceed 2.5 x the rated current
of the motor. The actual value is also determined by the peak current of
the servo amplifier that is used (defines the maximum value for the entry
of Ipeak in the current controller).
Rotor time constant
ASCII: MTR |
Default: 200 ms |
valid for all OPMODES |
Defines the rotor time constant under rated load (Tr = Lh/Rr).
Lh is die
magnetizing inductance and Rr is the rotor resistance.
Max. speed
ASCII: MSPEED |
Default: 3000 rpm |
valid for all OPMODES |
Maximum permissible speed of the motor. Limits the entry for the parameter
SPEED LIMIT (screen page "Speed controller").
Rated Speed
ASCII: MVR |
Default: 3000 rpm |
valid for all OPMODES |
Rated speed of the asynchronous motor. This defines the point above which
field-weakening is applied. For instance, if a 4-pole motor is used that
would normally operate on a 50Hz supply, then the rated speed must be set
to 1500.
Number / Name
ASCII: MNAME |
Default: blanks |
valid for all OPMODES |
ASCII: MNUMBER |
Default: 0 |
valid for all OPMODES |
Select the motor that is used from the motor database. The data are loaded after the motor has been selected. If an encoder is used as a feedback unit, the motor number will automatically be reported to the servo amplifier. Make changes only while the amplifier is disabled.
The following parameters are updated from the parameter set in the motor database:
Screen page |
Parameter |
Basic Setup |
Max. Mains Voltage |
Motor |
No. Of Poles, Io, Iomax, L, Max.speed, Current Advance, Start Phi, Limit Phi, Brake with dialogue box |
Feedback |
Feedback Type, No. Of Resolver Poles, Offset |
Current controller |
KP, Tn |
Speed controller |
KP, Tn, PID-T2, Feedback, Max.speed, Overspeed |
Brake
ASCII: MBRAKE |
Default: 0 |
valid for all OPMODES |
If you want to operate a 24V holding brake in the motor directly from the servo amplifier, this parameter can be used to enable the brake function.
In the diagram in the Product manual you can see the time/function relationship
between the ENABLE signal, the speed setpoint, actual speed value, and
the braking force. Change this only while the amplifier is disabled + reset.
Load Data from Disk
Load a motor-parameter file from a data medium (hard disk, diskette). The
servo amplifier must be disabled to do this.
Motor Unit
ASCII: MUNIT |
Default: 0 |
valid for all OPMODES |
Defines the entry for motor speed.
If 1/min (rpm) is used, the setting for
velocity/speed will be applied for VUNIT.
Field Level
ASCII: MIMR |
Default: 0 A |
valid for all OPMODES |
Defines the magnetizing current for an asynchronous motor: this is usually
set to 40% - 50% of the continuous current.
The magnetizing current remains
constant below the rated speed of the motor. If the motor is operated above
the rated speed, this current is reduced in inverse proportion to the motor
speed (field-weakening).
Kp
ASCII: GF |
Default: 15 |
valid for all OPMODES |
Proportional gain (P) of the flux controller. The flux controller is implemented
as a PI controller.
Tn
ASCII: GFTN |
Default: 50 ms |
valid for all OPMODES |
Reset (I) time of the flux controller. The flux controller is implemented
as a PI controller.
Field Correct Factor
ASCII: MCFW |
Default: 1.5 |
valid for all OPMODES |
Correction factor for field-weakening.
The correction factor compensates
for non-linearity of the motor inductance with reducing magnetizing current
by increasing speed during field-weakening.
Slip Correct Factor
ASCII: MCTR |
Default: 1.5 |
valid for all OPMODES |
Correction factor for the rotor (armature) time constant, increases the torque in the field-weakening range /stationary range.