Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"BLDC"”.
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Direct Back EMF Detection Method for Sensorless Brushless DC (BLDC) Motor Drives
Brushlesss dc (BLDC) motors and their drives are penetrating the market of home appliances, HVAC industry, and automotive applications in recent years because of their high efficiency, silent operation, compact form, reliability, and low maintenance. Traditionally, BLDC motors are commutated in …
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Detection of Rotor and Load Faults in BLDC Motors Operating Under Stationary and Non-Stationary Conditions
Brushless Direct Current (BLDC) motors are one of the motor types rapidly gaining popularity. BLDC motors are being increasingly used in critical high performance industries such as appliances, automotive, aerospace, consumer, medical, industrial automation equipment and instrumentation. Fault …
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Performance Evaluation of a Cascaded H-Bridge Multi Level Inverter Fed BLDC Motor Drive in an Electric Vehicle
… level inverter fed Brush Less Direct Current (BLDC) motor in a field oriented control fashion in an EV and make it follow a given drive cycle. The switching operation and control of a multi level inverter for specific power level and desired performance characteristics is investigated. The EV …
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A Brushless DC Motor Drive Without a DC Link Capacitor
… of industrial motor drives, Brushless DC (BLDC) and Permanent Magnet Synchronous (PMS) motors have become popular as energy efficient and reliable alternatives for induction motors. Both BLDC and permanent magnet synchronous motors are electronically commutated based on the position of the …
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Torque Controlled Drive for Permanent Magnet Direct Current Brushless Motors
… drive (VSD) based on a brushless direct current (BLDC) machine and discrete logic circuits. A practical VSD was built, capable of operating a BLDC machine in two quadrants, motoring and regenerative braking. The intended applications are electric scooters and electric bicycles, where the recovered …
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Simulation of speed control brushless DC motor using gaussian fuzzy logic controller
… a Fuzzy Logic for the brushless direct current (BLDC) motor drives. The BLDC motor has some advantages compare to others type of motors. However, the nonlinearity of this motor drive characteristics cause it is difficult to handle using conventional proportional-integral-differential (PID) …
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Hybrid fuzzy-proportionl integral derivative controller (F-PID-C) for control of speed brushless direct current motor (BLDCM)
… analyzed for controlling speed of brushless DC (BLDC) motor. A simulation investigation of the controller for controlling the speed of BLDC motors is performed to beat the presence of nonlinearities and uncertainties in the system. The fuzzy logic controller (FLC) is designed according to fuzzy …
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Hybrid fuzzy- proportionl integral derivative controller (F-PID-C) for control of speed brushless direct curren motor (BLDCM)
… analyzed for controlling speed of brushless DC (BLDC) motor. A simulation investigation of the controller for controlling the speed of BLDC motors is performed to beat the presence of nonlinearities and uncertainties in the system. The fuzzy logic controller (FLC) is designed according to fuzzy …
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Design of a Printed Circuit Board for a Sensorless Three-Phase Brushless DC Motor Control System
… these controllers further the potential use of BLDC motors. This project outlines the design of a PCB based, sensorless motor controller for operation of a three-phase BLDC motor powered by a 24 V, high current external supply. Components used were selected to withstand an ambient temperature …
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Design of an Ankle Exoskeleton Employing Dual Action Plantarflexion Assistance and Gait Progression Detection
… assistance to both ankles via a single BLDC motor and an underlying Bowden cable system. The metric ball screw and BLDC motor implemented in the linear actuator were selectively chosen to minimize the motor torque and current required to assist wearers impacted by a degree of muscle …
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Design of an Electric Scooter Drivetrain
… different motor models, including brushed and BLDC motors. This thesis details the design and construction of the scooter transmission and motor mount.
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Quantifying the Energetic Costs of Photovoltaic Pumping Systems (PVPS) for Sub-Saharan African Smallholder Farms
… specific SSA farm. By adopting highly efficient BLDC motors in 4-inch solar-powered borehole pumps, energetic cost-savings were found and operating regions not currently served by high-efficiency solar pumps can now be reached. These results highlight economic incentives for manufacturers to …
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High Speed flywheel and test rig design for rural energy storage
… machine and a drive system using Brushless DC (BLDC) mode of operation. The system was designed for 300Wh of energy storage for the delivery of 100W and 500W of power and an operating speed range of 8,000 rpm-25,000 rpm. The design and development of the flywheel energy storage system and test …
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SUPPRESSION OF HARMONIC TORQUE AND HARMONIC CURRENT IN PERMANENT MAGNET SYNCHRONOUS MOTOR
In this dissertation harmonic current, harmonic torque originated at the load and harmonic torque originated at the motor, where modeled and treated via closed loop control. The dissertation propose a remedy for cancelling harmonic current by placing the proposed adaptive feedforward controller …
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Modeling and Test of the Efficiency of Electronic Speed Controllers for Brushless DC Motors
<p>Small electric uninhabited aerial vehicles (UAV) represent a rapidly expanding market requiring optimization in both efficiency and weight; efficiency is critical during cruise or loiter where the vehicle operates at part power for up to 99% of the mission time. Of the four components (battery, …