ASCII - Command MVR    
Syntax Transmit MVR [Data]    
Syntax Receive MVR <Data>   Available in  
Type Variable rw   MMI No
ASCII Format Float   CANBus Object Number 366D (hex)
DIM rpm   PROFIBUS PNU 1965 (dec) IND = 1 (dec)
Range 0 .. 10000   DPR 365 (dec)
Default 6000    
Opmode All   Data Type Bus/DPR Integer32
Drive State -   Weighting 1000
Start Firmware 4.72    
Configuration No   Last Change of this Object 1.9
Function Group Motor   EEPROM Yes
Short Description Beginning Velocity of the field weakening

Description

For the induction motor mode (MTYPE = 3), the parameter MVR is set to the rated rotor mechanical velocity. This vale determines the beginning of the field weakening.
The value for 50 Hz induction motors with two poles is 3000 rpm. For the 50 Hz induction motor with four poles, MVR is 1500 rpm.
If the induction motor is for 60 Hz power line, the correspondent rated velocity should be given.

In the case of sensorless drives of PM motor (MTYPE=2, FBTYPE=10), the parameter MVR determines the switching value from scalar control to vector control. It is normally set to 10% ~ 20% of the rated velocity of the motor.

When using Hall' only, the parameter MVR determines the threshold speed where the actual speed is switched between speed estimation by using sensorless control method and speed calculation by the Hall's. So parameter's of the PM motor MKT, MKS and L must be set correctly. MTYPE has to be set to 2.
If MVR = 0, the compensation for the low speed will be switched off.
An optimal setting of this parameter depends on the relation of the motor poles and the rated speed. Normally it is set to 20 - 30% of the rated speed VLIM.