Compared to the proportional-integral strategy, repetitive control strategy possesses high suppression ability for alternating current (AC) harmonics of signals. Thus, RC controllers are widely used in closed-loop systems suppress periodic harmonics. In order further improve brushless DC (BLDC) motor operation performance, a frequency adaptive controller (FARC) is proposed, and then novel loop ...

-This paper Discuss about the problem occurring in the medium voltage distribution network such problems reactive power, harmonics and unbalanced load current compensation of Medium voltage Distribution systems. It proposes a simple and inexpensive solution to enhance power quality when a particular connection to the high voltage transmission network. It presents the design of a active power fi...

Permanent Magnet Brushless DC (PMBLDC) machines have found immerse applications in automobile, automation, consumer electronics, medical and industrial applications due to their high efficiency, long operating life ratio of torque delivered to the size and fast dynamic response. In a brushless motor, the rotor incorporates the magnets, and the stator contains the windings. Commutation is implem...

This paper describes a method for reducing the common-mode voltage in seven-phase brushless DC motor (BLDC) drive. The conventional interleaved used three-phase inverter system is extended and applied. proposed phase-phase studied to apply six-phase excitation controlling BLDC. switching functions related with modulation index (MI) angle are obtained, average of derived mathematically. control ...

This paper uses a new position sensor less drive for brushless DC (BLDC) motors. In conventional sensor less control methods such as the back-EMF detection method, the performance is high only at a high speed range due to the fact that the magnitude of the back-EMF is dependent on the rotor speed. A solution is derived that estimates the rotor position by using an unknown input observer over a ...

The paper gives design methods dedicated to speed control of Direct Current (DC) and Brushless Direct Current (BLDC) motors in the framework of servo systems. Two design approaches are offered for position and speed control of servo systems with inner current control loops. The PI and PID controllers in these approaches are tuned on the basis the Extended Symmetrical Optimum method and of the d...

This paper provides a technical review of position and speed sensorless methods for controlling Brushless Direct Current (BLDC) motor drives, including the background analysis using sensors, limitations and advances. The performance and reliability of BLDC motor drivers have been improved because the conventional control and sensing techniques have been improved through sensorless technology. T...

This paper deals with the Direct Torque Control (DTC) of Brushless DC (BLDC) motor drives fed by four-switch inverters (also known as B4inverters) rather than six-switch inverters (also known as B6 inverters) in conventional drives. The principle of operation of the BLDC motor is firstly recalled considering both cases of B6and B4-inverters in the armature, with emphasis on the twoand three-pha...

This study presents the simulation of brushless DC (BLDC) motor control in MATLAB/Simulink environment with model-based and direct torque (DTC) method extended kalman filter (EKF). In this study, a based on DTC is tested to nonlinear BLDC filter. method, an accurate can be made thanks load moment estimation, which not found literature. As result tests have carried out at low high speeds, it con...