DTFC-SVM for five-Level Cascaded Inverter Fed IM Drive with reduced switches

Multilevel Inverter fed Direct Torque and Flux Control‐Space Vector Modulation of Speed Sensorless Permanent Magnet Synchronous Motor drive with Improved Steady State and Dynamic Characteristics

“…The SVM-based MLIs are used to enhance the system performance by providing a more number of voltage vectors to realize the reference voltage vector in space vector diagram such that, it gives less ripple content in torque and flux. 15,16,18 The reference voltage vector plays a key role in DTFC SVM control algorithm. The Clarke transformation is used to convert three variable rotating parameters to two variable constant parameters such that it is easy to implement the control algorithm.…”

“…It consists of a five‐level diode clamped inverter for which switching gate pulses are supplied by a five‐level SVM switching technique, 29 and it is designed based on two‐level SVM. The SVM‐based MLIs are used to enhance the system performance by providing a more number of voltage vectors to realize the reference voltage vector in space vector diagram such that, it gives less ripple content in torque and flux 15,16,18 . The reference voltage vector plays a key role in DTFC SVM control algorithm.…”

“…There are various types of speed control techniques are available such as scalar control, vector controls and model predictive controls (MPC) 3–14 . The vector control method further classified as field‐oriented control (FOC), 2,3 direct torque control (DTC), 4–6 and direct torque and flux control with space vector modulation (DTFC‐SVM) 15,16 …”

“…[3][4][5][6][7][8][9][10][11][12][13][14] The vector control method further classified as field-oriented control (FOC), 2,3 direct torque control (DTC), [4][5][6] and direct torque and flux control with space vector modulation (DTFC-SVM). 15,16 The MPC and DTFC-SVM techniques are more commonly used in various industrial applications because of certain drawbacks and limitations associated with other speed control techniques like FOC and DTC. [2][3][4][5][6] The variable switching frequency in DTC leads to high values of stator flux and torque ripples.…”

“…However, it can be overcome by incorporating constant switching frequency control algorithms like space vector modulation (SVM) and duty ratio control with DTC method. 13,14,17 The DTFC with SVM 15,16,18 is considered to be the best motor speed control strategy compared to FOC and DTC methods because it controls stator flux and torque independently with reduced ripple content by maintaining constant switching frequency. It has gained more and more research attention in both motor control and power electronics fields.…”