Modelling of sensored speed control of BLDC motor using MATLAB/SIMULINK

Recent developments in the field of magnetic materials and power electronics, along with the availability of cheap powerful processors, have increased the adoption of brushless direct current (BLDC) motors for various applications, such as in home appliances as well as in automotive, aerospace, and medical industries. The wide adoption of this motor is due to its many advantages over other types of motors, such as high efficiency, high dynamic response, long operating life, relatively quiet operation, and higher speed ranges. This paper presents a simulation of digital sensor control of permanent magnet BLDC motor speed using the MATLAB/SIMULINK environment. A closed loop speed control was developed, and different tests were conducted to evaluate the validity of the control algorithms. Results confirm the satisfactory operation of the proposed control algorithms

Automatic Irrigation System with PV Solar Tracking

Abstract The objective of this paperis to design and costruct an automatic irrigation system powered by PV panelson a laboratory level. A humidity sensor in the soil and temperature sensors in the air are usedto check the need for irrigation in order to operate a pump powered by the PV system. This PVsystem is a two axis solar tracking one. Sensors are installed on PV panels tocheck the position of the sun so that PV panels are always perpendicular to thesun. This control is made by means of a microcontroller. The whole system isfirst simulated by ISIS simulation software to validate the final controlalgorithem to be implemented. A particular attention has been given to thesolar tracking system. Experimental study is carried out to evaluate theperformance of the tracking system in laboratory by using a light source tosimulate the sun.These results show thevalidity of the control of the irrigation system and the PV panels are alwaysnormal to the light source