MVR

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 = 0000xxxx (bin)

Range

0 .. 10000

DPR

365 (dec)

Default

6000

 

Opmode

All

Data Type Bus/DPR

Integer32

Drive State

-

Weightning

1000

Start Firmware

4.72

 

Configuration

No

Revision

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 parameters of the PM motor MKT, MKS and L must be set correctly. MTYPE must 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.