Description
The rotor time constant is calculated as the ratio between rotor magnetizing inductance Lm and rotor resistance Rr from the following equivalent circuit of an induction machine.
Alternatively, the rotor time constant can be estimated from the rated current, magnetizing current (MOTOR.IMID) and rated slip frequency as follows:
where Is,rms is the rated current, Id,rms is the rated magnetizing current, and ωslip is the rated slip frequency in rad/s.
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τ is in seconds for the above formulas. It needs to converted to ms for the MOTOR.IMTR setting:
MOTOR.IMTR(ms) = τ*1000
General Information
|
Type |
R/W |
|
Units |
Ms |
|
Range |
1 to 16,000 |
|
Default Value |
100 |
|
Data Type |
Integer |
|
Start Version |
M_01-08-00-000 |
Variants Supported
| Variant | Supported |
|---|---|
| AKD Base | Yes |
| AKD with Position Indexer | Yes |
| AKD EtherCAT | Yes |
| AKD CANopen | Yes |
| AKD BASIC | Yes |
| AKD SynqNet | Yes* |
| AKD EtherNet/IP | Yes |
| AKD Profinet | Yes |
| AKD sercos® III | Yes |
| AKD-N | Yes |
| AKD-C | No |
*In SynqNet, a parameter may be available in the firmware but have no effect on the system. See SynqNet Supported Parameters.
Fieldbus Information
If your drive type is listed as supported but no index, address, or instance number is listed, then this parameter is accessible through WorkBench, but not over your fieldbus type.
|
Fieldbus |
Index/Subindex |
Object Start Version |
|---|---|---|
|
EtherCAT COE and CANopen |
5360h /0 |
M_01-08-00-000 |
|
Fieldbus |
Address |
Attributes | Signed? |
|---|---|---|---|
|
Profinet |
2864 |
Word | No |
| sercos® III | 2 Octets |
| Fieldbus | Instance | Data Size | Data Type |
|---|---|---|---|
| EtherNet/IP | 865 | 2 Byte | Integer |
|
Fieldbus |
Index/Subindex |
Is 64 bit? | Attributes | Signed? |
|---|---|---|---|---|
|
Modbus |
1728 |
No | 16-bit | No |
Related Topics
