2060 IEEE TRANSACTIONS ON ELECTRON DEVICES‚ VOL. 39‚ NO. 9‚ SEPTEMBER 1992 Micromotor Fabrication Mehran Mehregany‚ Stephen D. Senturia‚ Member‚ IEEE‚ Jeffrey H. Lang‚ Member‚ IEEE‚ and Pradnya Nagarkar Abstract-This paper presents a detailed discussion of micromotor fabrication and related critical issues. The micromotors under study are of the variable-capacitance side-drive type with salient-pole and wobble (harmonic) designs. Polysilicon surface micromachining forms the basis of the
Premium Friction Electric motor Electricity
Torque The motor is subject to several kinds of torque. The starting or start-up torque is the amount present when the motor is stationary and power is applied. The pull-up torque is the minimum amount necessary for the motor during the starting sequence. Effects of Low Voltage on Torque A reduced amount of voltage will reduce the amount of torque. This can result in difficulty for start loads. A reduction of voltage to 80 percent would result in a torque value
Premium
shunt motor has four poles‚ four parallel paths and 882 armature conductors. The armature circuit resistance is 0.170 . At rated speed and rated output the armature current is 110 A and the field current is 2.2 A. Calculate: a. the electromagnetic torque b. the flux per pole c. the rotational losses d. the efficiency e. the shaft load f. the field flux is reduced by 15% of its original value by means of a field rheostat. Determine the new operating speed. 7. A separately excited dc motor when operated
Premium Electric motor
from the ultrasonic vibration of a component‚ the stator being placed against another‚ the rotor depending on the scheme of operation. • Conversion of electric energy into motion by inverse piezoelectric effect. • To obtain the levels of torque speed characteristics of USM using conventional motors we require to add a gear system to reduce the speed. • These characteristics of USM makes them attractive for robotic applications where small motions are required. • This motor achieves
Premium Electric motor
Introduction • Design of machine elements needs geometry and joints; single integral parts will not do • Parts are joined by fasteners and they are conveniently classified as permanent‚ semi-permanent and nonpermanent joints • Permanent :Welded joints‚ adhesive bonding Semi-permanent : Riveted joints Non-permanent fasteners: Threaded/ non threaded joints Non threaded joints- keys‚ pins etc. Threaded joints- screws‚ bolts and nuts‚ studs etc. BITS Pilani‚ Pilani Campus Thread Standards and
Premium Force Screw Nut
TATA MOTORS –An Introduction "Best in the manner in which we 0perate‚ best in the product we deliver‚ and best in 0ur value system and ethics." Tata Motors Limited‚ previously Tata Engineering and Locomotive Company (TELCO) is an Indian international automobile assembling organization head quartered in Mumbai‚ Maharashtra‚ India and a subsidiary of the Tata Group. Its things join voyager cars‚ trucks‚ vans‚ mentors‚ public transports‚ development supplies and military vehicles. It is the world’s
Premium Tata Motors Tata Motors
SUMMARY UG NX7.5 Motion Simulation Training Package Unigraphics Solutions Company (UGS) is the world famous MCAD suppliers‚ mainly for the automotive and transportation‚ aerospace‚ general machinery and electronics industries. Through its Virtual Product Development (VPD) philosophy‚ UGS supply software product and services to company of multipolarity‚ collective‚ enterprise. Its main products are UG CAD. This UG motion simulation training package mainly introduces some basic knowledge
Premium Kinematics Classical mechanics Joint
International Journal of Computer and Electrical Engineering‚ Vol. 2‚ No. 1‚ February‚ 2010 1793-8163 Doubly-Fed Induction Generator for Variable Speed Wind Energy Conversion SystemsModeling & Simulation B.Chitti Babu ‚ K.B.Mohanty Abstract— The aim of this paper is to present the complete modeling and simulation of wind turbine driven doubly-fed induction generator which feeds ac power to the utility grid. For that‚ two pulse width modulated voltage source converters are connected back to back
Premium Wind turbine Wind power Renewable energy
but by interference. The two parts of the clutch are designed such that one will push the other‚ causing both to rotate at the same speed and will never slip. Dog clutches are used where slip is undesirable and/or the clutch is not used to control torque. Without slippage‚ dog clutches are not affected by wear in the same way that
Premium Resistor Magnetic field
Controlled Assessment – Helicopters You need to research information (using the internet) that includes answers for the following questions: 1. How the turning rotor makes a helicopter move upwards 2. How the rotor is made to turn in a helicopter and in an autogyro 3. How autorotation is used to help land a helicopter safely if the engine fails 4. Why a helicopter; falling during autorotation‚ could reach a terminal speed without the pilot changing any controls 5. The effect of the weight of
Premium Lift Force Airfoil