ASCII Objekt-Reference 

 

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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.