Table 2 Critical analysis of the improvement techniques of direct torque control [29, 34, 53,54,55, 73, 116, 118,119,120,121]
From: Modern improvement techniques of direct torque control for induction motor drives - a review
| Â | Conventional DTC | SVM based DTC | SMC based DTC | DTC-MPC | Fuzzy based DTC | ANN based DTC | GA based DTC |
|---|---|---|---|---|---|---|---|
Torque dynamic response | Fast | Fast | Fast | Fast | Very fast | Very fast | Very fast |
Torque and flux ripple | High | Low | Medium | Low | Very low | Very low | Medium |
Current THD | More distortions | Less distortion | Less distortion | Less distortion | Less distortion | Less distortion | Less distortion |
Switching frequency | Variable | Constant | Almost constant | Constant | Constant | Constant | Almost constant |
Parameter sensitivity | Insensitive | Sensitive | Insensitive | Insensitive | Insensitive | Insensitive | Insensitive |
Switching loss | High | Low | Medium | Low | Low | Low | Medium |
Dynamic at low speed | Poor | Good | Good | Good | Very good | Very good | Very good |
Algorithm complexity | Simple | Simple | Complex | Simple | More complex | More complex | Complex |
Computation time | Low | Medium | High | Medium | High | High | Medium |
Precession | Low | Medium | Medium | Medium | High | High | Medium |
Regulation | Hysteresis | PI conventional | SMC controller | Hysteresis | FLC | ANN | GA-PI |