Slip frequency calculation
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| in the palette | on the schematic |
When orienting the d-axis of the dq system along the rotor flux, the block calculates the slip frequency corresponding to the specified motor torque.
The block calculates the slip frequency according to the following formula:
where:
- Δω — angular field slip velocity,
- Mnorm — normalizing torque value,
- Me — electromagnetic torque of the motor,
- RR — rotor resistance,
- Zp — the number of motor pole pairs,
- ψR — rotor flux linkage;
When working in absolute values, it is necessary to set Mnorm = 1.
Note:
For detailed description of the model see [1, 2].
Inputs
| Parameter | Description | Communication line type |
|---|---|---|
| M | The set electromagnetic torque of the motor | Mathematical |
Outputs
| Parameter | Description | Communication line type |
|---|---|---|
| dw | Field slip velocity | Mathematical |
Properties
| Title | Parameter | Description | By default | Data type |
|---|---|---|---|---|
| Normalizing value of the torque, n*m or relative units | Mnorm | Normalizing torque value | 1 | Вещественное |
| Rotor resistance, Ohm | Rr | Rotor resistance | 0.145 | Вещественное |
| Number of motor poles | Zp | Number of motor poles | 1 | Вещественное |
| Specified motor rotor flux linkage, Wb | F | Specified motor rotor flux linkage | 0.7 | Вещественное |
Parameters
The block has no parameters.
Examples
Examples of block application:
- AM position
- AM speed
- AM speed in relative units