please do send me the ppt of the project(pendrive to pendrive data transfer without using pc) ....etc

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VARIABLE SPEED DC MOTOR DRIVE


DC MOTOR THEORY:
Inducing a Force on a Conductor.
There are two conditions which are necessary to produce a force on a conductor:
i. The conductor must be carrying current.
ii. The conductor must be within a magnetic field.
When these two conditions exist, a force will be applied to the conductor, which
will attempt to move the conductor in a direction perpendicular to the magnetic
field. This is the basic theory by which all DC motors operate.
....etc

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Variable Frequency Drives

Introduction
Variable Frequency Drives are devices which control the speed of alternating current(AC) electric motors by controlling the frequency of the supply voltage of the motor. Motor-driven systems are designed to handle peak loads. If the system is running at a reduced load for some period of time, it will lead to energy inefficiency. With Variable frequency drives and the ability to adjust the speed of the motor, enables you to match the motor output to load requirement thus resul ....etc

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i need this pdf file can you please make it available for me. thanx ....etc

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Abstract
When no transformer is used in a grid-connected photovoltaic
(PV) system, a galvanic connection between the grid and
the PV array exists. In these conditions, dangerous leakage currents
(common-mode currents) can appear through the stray capacitance
between the PV array and the ground. In order to avoid
these leakage currents, different inverter topologies that generate
no varying common-mode voltages, such as the half-bridge and
the bipolar pulsewidth modulation (PWM) full-bridge topologies,
have been proposed. The nee ....etc

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Variable Voltage And Variable Frequency drives

Presented By:
P.NATARAJU S.E.V.S.RAGHU VARMA
3rd year E.E.E. 3rd year E.E.E.

Abstract:-
Our varying industrial needs demand more precise control of the outputs of our basic electrical prime movers i.e, THE MOTORS. Basically dc motors are easy to control compared to their ac counter parts, but they have their own limitations with increase in capacity. Conversely ac motors in particular squirrel cage induction motors are very economical but their spee ....etc

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A new high-efficiency single-phase transformerless PV inverter topology

Tam s Kerekes, Member, IEE, Remus Teodorescu, Senior Member, IEE, Pedro Rodr guez, Member, IEE,
Gerardo V zquez, Student Member, IEE, Emiliano Aldabas, Member, IEE


ABSTRACT:
There is a strong trend in the photovoltaic (PV) inverter technology to use transformer less topologies in order to acquire higher efficiencies combining with very low ground leakage current. In this paper a new topology, based on the H Bridge with a new AC bypass circuit ....etc

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sir i am searching for transformerless solar inverter ppt so please kindly send me about transformerless solar inverter ....etc

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I need documentation,ppt,abstract on transformerless solar inverter seminar report
my mailid : [email protected] ....etc

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i request to sent me the working of transformerless variable frequency drive ....etc

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