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.
Results
Showing 1 to 20 of 45 for “"direct drive"”.
-
Analysis, design and control of direct-drive manipulators
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1985.
-
Linear generators for direct drive marine renewable energy converters
… must be reacted by an electrical machine in a direct drive system. Attention is focused on the development of two novel topology linear permanent magnet machines suitable for use in this application. For each topology, models are presented that are capable of predicting the force …
-
Planetová převodovka pohonu desky karuselu poháněná direct-drive motorem.
Hlavním tématem této práce je analýza, návrh a konstrukce planetové převodovky pro pohon stolu karuselu. Teoretická část práce popisuje základní vlastnosti a pojmy planetových převodovek a momentových motorů. V dalším průběhu mé práce jsem navrhl bezvůlový chod ozubení. Výpočtovou část jsem …
-
Trajectory and force control of a direct drive arm
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1986.
-
AC Direct Drive LED Lighting Using Low Cost Analog Components
… explores the rapidly expanding area of AC direct drive for LED lighting. AC LED driving does not use typical DC-DC converter-based driving but uses semiconductor switches and a linear regulator to activate a number of LEDs proportional to the input voltage at any given time. This allows …
-
A direct-drive linear actuated assistive robot for the shoulder
… robots: wearable, portable, and adaptable. Direct-drive linear synchronous motors can potentially solve many challenges faced in the use of these robots. However, off-the-shelf motors are unable to meet the requirements for rehabilitation robots. This thesis explores the application of …
-
The Propulsive Design Aspects on the World’s First Direct Drive Hybrid Airplane
… a safe technology demonstrator by implementing a direct drive propulsion system for a gas-electric hybrid aircraft. This system was integrated on the Embry-Riddle Eco-Eagle for the Green Flight Challenge 2011. The aim of the system is to allow the pilot to use the electric motor as an independent …
-
Permanent-magnet synchronous motors and associated power electronics for direct-drive vehicle propulsion
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
-
Design and Control of Quasi-direct Drive Actuation for Lightweight and Versatile Wearable Robots
… and control bandwidth performance of quasi-direct drive actuation using a unified human-robot interaction model</p> <p>3) Developing walking and squatting controllers for non-rhythmic versatile assistance</p> <p><em>My research pioneered the quasi-direct drive actuator </em>paradigm<em> for …
-
Design of 10 MW low inductance PM generator for direct drive offshore wind turbine
Direct drive permanent magnet synchronous generators (PMSG) in wind turbine applications are becoming increasingly popular due to their reliability compared to medium speed generators with a gearbox. A proposed generator-drive scheme with reduced active switching provides a way to reduce the power …
-
A study of mechanical behaviour of the double-row tapered ring bearing for the main shaft of a direct-drive wind turbine
… are one of the main components of a modern direct-drive wind turbines, TRBs are commonly used to support the main shafts of wind turbines since fault scan lead to the malfunctions and downtime of wind turbines. In recent decades, some numerical approaches have been proposed for calculating …
-
Development of a computational tool and dynamometer for optimizing variable-speed centrifugal pump selection for a containerized, direct-drive photovoltaic electrodialysis desalination system
… and Research (GEAR) Center’s containerized, direct-drive photovoltaic electrodialysis desalination system capable of producing up to 300m3 of potable water per day. The novel flow-commanded current control scheme of this containerized desalination plant (CDP), which enables its minimal energy …
-
Design of a Vernier Permanent Magnet Wind Generator
… has resulted in a greater demand for low-speed direct-drive machines. The Vernier machine has inherent properties such as high torque density, sinusoidal induced voltages and low torque ripple which makes it suitable for low-speed direct-drive wind applications. Additionally, its mechanical …
-
Electropermanent magnetic connectors and actuators : devices and their application in programmable matter
… to fabricate, we want to use electromagnetic direct drive, rather than clockwork, to actuate the particles. Previous attempts to fabricate small scale (below one centimeter) robotic systems with electromagnetic direct-drive have typically run into problems with insufficient force or torque, …
-
Design and development of a small-scale 12S-14P outer rotor HEFSM
… simulation process, the rotor design with direct drive structure as illustrated in Appendix A is chosen based on optimisation process. Thus, the generated back EMF, torque, and power through simulation at a speed of 1,200 r/min is 6.58 V, 16.4 Nm, and 12.4 kW, correspondingly. The designed …
-
Design and prototyping methods for brushless motors and motor control
… Two 500W hub motors are implemented in a direct-drive electric scooter. The third case study, a 10kW axial flux motor, is used to demonstrate the flexibility of the design methods. A variety of ways to predict the motor constant, which relates torque to current and speed to voltage, are …
-
Simple, sustainable, water straight from the sun - batteryless electrodialysis desalination
… power system but can be most advantageous in direct-drive variable power situations, such as with solar panels. The controller is extremely simple, computationally efficient, and robust to implement: it relies on two sensors - a flow meter and a conductivity meter, one equation, and a PID …
-
Design Of Proprioceptive Legged Robots
… and tangential (to detect slip or stubbing) directions for appropriate gait-level control. This “feeling” can be accomplished by explicit force/torque sensors in the foot/leg/actuator, or by measuring the deflection of a series mechanical spring. In this thesis we analyze machines that obtain …
-
Preliminary design and viability consideration of external, shroud-based stators in wind turbine generators
… designs often included gearboxes or large direct-drive generators to compensate for the low peripheral speeds of the turbine hub. To take advantage of high blade tip speeds, an alternative generator configuration could employ a stator positioned in a shroud on the outside diameter of the …
Page 1 of 3