## 7 Impact of Control Strategies on OEWM-DTLI Performance
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**DCB Type**} & \multirow{2}{*}{**REF**} & \multirow{2}{*}{**Proposed Control Strategy**} & \multicolumn{6}{c}{**Improved Performances**} \\ \cline{3-10}  & & & **ZSV** & **CMV** & **Overcharging** & **THD** & **Efficiency** \\ \hline \multirow{4}{*}{Type 1} & \multirow{4}{*}{[173]} & \multirow{4}{*}{[173]} & Introduces a modified hysteresis torque controller into the direct torque control scheme of a 5-phase open-end & ✗���� ✓ & ✓ ✓ & ✗� \\  & & winding induction motor, with the goal of enhancing & & & & & & \\  & & steady-state performance. & & & & & & \\ \cline{2-10}  & & Proposes a novel PWM strategy for high modulation & & & & & & \\  & & index regions, aimed at eliminating the Zero Sequence & ✓�� & ✓ & ✓ & ✓ & ✗ \\  & & Current component. & & & & & & \\ \hline \multirow{4}{*}{Type 1} & \multirow{4}{*}{[156]} & Proposes a Nested Inverter Clamped Sample-Averaged & & & & & & \\  & Zero-Sequence Elimination PWM strategy, based on the & & ✓��� & ✓ & ✗� & ✓ \\  & strategic placement of the zero-vector period, and & & & & & & \\  & induced restrictive receiver circuit design. & & & & & & \\ \hline \multirow{4}{*}{[131]} & Proposes a strategy based on unequal reference sharing algorithms utilizing discontinuous PWM and & & & & & & \\  & introduces the Coupled Phase Disposition strategy, also & ✓�� & ✓�� & ✓ & ✓ & ✗ \\  & based on discontinuous PWM & & & & & & \\ \hline \multirow{4}{*}{[69]} & proposes a near-state Pulse Width Modulation strategy, & & & & & & \\  & which focuses on the optimal adjustment of the offset & ✓���� & ✗� & ✓�� & ✗ \\  & angle and modulation index. & & & & & & \\ \hline \multirow{4}{*}{[117]} & Proposes a Sample-Averaged Zero-Sequence & & & & & & \\  & Elimination SVPWM strategy, which is based on the & & & & & \\  & adjustment of switching times. Additionally, the work & ✓��� & ✓�� & ✓�� & ✗ & ✗ \\  & presents a nested rectifier-invert combination within the conventional two-level inverter configuration, & & & & & \\  & utilizing three DCBs. & & & & & & \\ \hline \multirow{4}{*}{[67]} & Proposes a decoupled equal-duty SVPWM strategy, which is based on the use of cycles for all phases. & ✓���� & ✓����� & ✗� & ✗� \\  & Proposes a decoupled proportional-duty SVPWM & & & & & & \\  & strategy, which adjusts the duty cycle based on the & ✓��� & ✓�� & ✓� & ✓� & ✓ \\  & DCB voltage. & & & & & \\ \hline \multirow{4}{*}{Type 2} & Proposes a Decoupled Sampled Average Zero Sequence & & & & & \\  & Elimination strategy, aiming to improve system & & & & & \\  & performance by optimizing zero-sequence current & & & & & \\  & management. Also introduces a power circuit & & & & & \\  & configuration that integrates a rectifier-inverter within a & & & & & \\  & conventional two-level inverter setup. & & & & & \\ \hline \multirow{4}{*}{[175]} & Proposes a new Predictive Current Control strategy, aiming to enhance the dynamic performance and & & & & & \\  & current regulation of the OEMM-DTL system. & & & & & \\ \hline \multirow{4}{*}{[176]} & Proposes a selection of PWM switching patterns, investigating the effects of continuous PWM, & & & & & \\  & discontinuous PWM, mixed continuous PWM, and & ✗���� & ✗� & ✓� & ✓� \\  & mixed discontinuous PWM strategies to enhance the & & & & & \\  & voltage quality and efficiency of the DTL system. & & & & & \\ \hline \multirow{4}{*}{[177]} & Proposes a class of carrier-based PWM methods in & & & & & \\  & which two phases in each inverter are clamped & & & & & \\  & simultaneously during the entire fundamental cycle, & & & & \\  & while only one phase switches to generate the reference & & & & & \\  & voltage, aiming to reduce switching losses and & & & & \\  & common-mode voltage. & & & & & \\ \hline \multirow{4}{*}{[178]} & Proposes a two-stage model-predictive direct torque control scheme designed to balance the state-of-charge & & & & & \\  & of batteries through the appropriate selection of inverter & & & & & \\  & voltage vectors. & & & & & \\ \hline \multirow{4}{*}{[125]} & Proposes an SVPWM strategy based on five-state & & & & & \\  & switching, travelling through neighboring & ✗���� & ✓�� & ✓�� & ✓�� \\  & vector switching, thereby improving switching efficiency and reducing losses. & & & & & \\ \hline \multirow{4}{*}{[68]} & Proposes a hybrid PWM strategy in which the first & & & & & \\  & inverter is controlled using Sig-Step PWM, while the & & & & & \\  & second inverter is controlled using conventional PWM. & & & & & \\ \hline \multirow{4}{*}{Type 3} & Proposes a hybrid PWM strategy, where the first inverter & & & & & \\  & uses a PWM method based on a double vector, combining an active vector with an optimal zero vector & ✓����� & ✓��� & ✓�� \\  & within a switching period, while the second inverter is & & & & \\  & controlled by conventional SVPWM. & & & & & \\ \hline \multirow{4}{*}{[119]} & Proposes a floating capacitor voltage regulation scheme based on the use of reference and measured voltages and & & & & & \\  & currents, combined with an improved SVPWM strategy & ✓������ & ✓����� & ✗� \\ \cline{1-1}  & incorporating current feedback and enhancing the exploitation of the converter voltage. & & & & \\ \hline \hline \end{tabular}
\end{table}