Drive performance, stability limit: Recommendations for optimising the dynamic drive behaviour

Reducing the filter time constant (0x2904) for the actual speed value:
- Depending on the application, the time constant of the actual speed value filter can be reduced to 0.1...0.4 ms. The smaller the time constant the higher the achievable dynamic response.
- Disadvantage: Due to the lower robustness resulting from the reduced filtering of interfering signals, e.g. in the case of an unfavourable mechanical connection of the feedback system, there may be increased noise generation.

Increasing the inverter switching frequency (0x2939):
- The higher the inverter switching frequency, the higher the achievable dynamic response.
- Disadvantage: The power loss in the inverter increases with a higher switching frequency. As a result, a larger device may be required. In this context, you have to consider that there is only a rather marginal gain in dynamic performance between 8 kHz and 16 kHz.

Only i700: Deactivating the internal torque interpolation (0x2DE0:5)
- When the torque interpolation is deactivated, the stability limit rises. The speed controller settings may be slightly increased. As a result, the dynamic response and the steadiness of the speed control circuit will increase. Subsequently, you can also use a higher position controller gain.
- In some applications, this may lead to vibrations that are manifested as noise.

Only i700: Increasing the dynamics of the resolver evaluation (0x2DE0:3)
- The resolver dynamics can be increased to 200 in order to increase the dynamic response of the corresponding systems.
- Disadvantage: There may be increased noise generation due to the reduced robustness to interference injections.