A Review on Constant Switching Frequency Techniques for Direct Torque Control of Induction Motor

Auzani Jidin (Universiti Teknikal Malaysia Melaka)
Kasrul Abdul Karim (Universiti Teknikal Malaysia Melaka)
Khairi Rahim (Universiti Teknikal Malaysia Melaka)
Logan Raj Lourdes Victor Raj (Universiti Teknikal Malaysia Melaka)
Sundram Ramahlingam (Universiti Teknikal Malaysia Melaka)
Tole Sutikno (Universitas Ahmad Dahlan)

Indonesian Journal of Electrical Engineering and Computer Science
Vol 7, No 2: August 2017

The Direct Torque Control (DTC) of induction machine has received wide acceptance in many Variable Speed Drive (VSD) applications due to its simple control structure and excellent torque dynamic control performances. However, the conventional DTC which employs a two-level inverter and hysteresis controllers produces two major drawbacks, namely, larger torque ripple and variable switching frequency, which might produce a very high switching frequency (or power loss), particularly at a very low speed operation. This paper highlight the common methods used to provide the constant switching frequency for DTC drives for Induction Motor that able to minimize the power losses and reduced the torque ripple.