Study of a Five-Level PWM Rectifier Fed DC Motor Drive


A simulation of a five-level sinusoidal pulse width modulation (SPWM) rectifier fed D.C motor is proposed. The proposed topology of a five-level rectifier can be regulate the output voltage using (SPWM) to obtain variable speed of a D.C motor with constant load torque. The main advantages of the SPWM rectifier system are to drive a D.C motor with constant and variation load torque, low harmonic distortion in A.C supply side. The PID speed controller is used to make constant speed when load torque increase or decrease about 20% of rated value and to improve the dynamic response of the system. The five-level SPWM rectifier fed separately excited D.C motor are studied and simulated under the MATLAB/SIMULINK program.


  1. Five-level rectifier
  2. C motor drive
  3. PID speed controller
  4. SPWM



The paper presents a study and modeling of a five level rectifier with SPWM technique as a DC motor driver. Several researches focused on constructing the circuit of multi-level rectifier with static load (RL). In this study the five level rectifier system has been tested with a dynamic load as a separately excited DC motor. The proposed system investigated in case of open loop system with A disturbance in load torque applied +-20%from rated load torque and that’s lead to dramatic variation in motor speed with respect  to desired speed. Furthermore the effect of THD for input current was considered. PID controller is applied to the proposed system with the same disturbance in load torque and the results shows a constant output speed at desired speed with minimum response percentage error.


[1] Muhammad H. Rashid, “Power Electronics Devices, Circuits, and Applications”, Fourth Edition, ISBN 978-0-13-312590-0, published by Pearson Education, 2014.

[2] Jun-ichi Itoh, Yuichi Noge, and Taketo Adachi, “A Novel Five-Level Three-Phase PWM Rectifier With Reduced Switch Count”, IEEE Transactions On Power Electronics, Vol. 26, No. 8, AUGUST 2011.

[3] N. A. Rahim, J. A. Jalil, “Single-Phase Five-Level PWM Rectifier”, Institute of Research Management & Monitoring, University of Malaya.

[4] Omar Turath Tawfeeq, “Single Tuned Passive Harmonics Filters Design For A Buck Type Rectifier D.C Motor Drive Using Fuzzy Controller”, International Journal of Engineering and Innovative Technology (IJEIT) Volume 4, Issue 11, May 2015.

[5] Vivek Kumar, AshishPatra, “Application of Ziegler-Nichols method for tuning of PID Controller”, International Journal of electrical and Electronic Engineers, Vol. No.8, Issue No. 02, July-Dec. 2016.

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