| Ward Leonard Speed Control System |
 |
| The system is made up of a driving motor which runs at almost constant speed and powers a dc generator as shown in the diagram. The generator output is fed to a dc motor. By varying the generator field current, its output voltage will change |
|
| Rate this Book: |
| Three-Phase Controlled Rectifiers |
|
| Three-phase controlled rectifiers have a wide range of applications, from small rectifiers to large
High Voltage Direct Current (HVDC) transmission systems. |
|
| Rate this Book: |
| Speed Control Of DC |
|
| The aim of this investigation is to describe the principle of DC motor speed control using nonlinear combined control (armature voltage and field current). For the armature control mode, the field current is held constant and an adjustable voltage is applied to the armature. |
|
| Rate this Book: |
| Single Phase Induction Motor |
|
| In this project, the applications of VLSI in motor control is realized with two
approaches: DSP and microcontroller. A single phase induction motor adjustable speed
drive control is implemented with hardware setup and software program in C code. |
|
| Rate this Book: |
| Motor Starter Units |
|
| Isolating contacts are compulsory and must be fitted at the head of all circuits (cf. installation standards NF C15-100, IEC 60364-5-53), they are
not compulsory but recommended for each motor starter unit. Their role
is to insulate circuits |
|
| Rate this Book: |
| Circuit Operation Basics |
|
| This page describes the operation of the three-phase semi-controlled rectifier. When a semi-controlled rectifier is used, the output of the bridge is controlled when it remains positive. |
|
| Rate this Book: |
| Circuit Operation |
|
| A fully-controlled rectifier circuit contains only controlled-rectifiers, whereas a semi-controlled rectifier circuit is made up of both controlled and uncontrolled rectifiers. |
|
| Rate this Book: |
| Drive Motors |
|
| A Brief Description of Drive Motors are explained in the Notes |
|
| Rate this Book: |
| DC to DC Converter |
|
| Basic non-isolated DC-DC converter topologies: Buck, Boost, Buck-Boost, Cuk in CCM and DCM mode
Non-ideal effects on converter performance,Isolated DC-DC converters, switched-mode power supply |
|
| Rate this Book: |
| DC Motor Control Circuits |
|
| This worksheet and all related files are licensed under the Creative Commons Attribution License,
version 1.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/1.0/, or send a
letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA. The terms and
conditions of this license allow for free copying, distribution, and/or modification of all licensed works by
the general public |
|
| Rate this Book: |
| DC Drive — Solid |
|
| During the design of new (or upgrades to) motor generator set type DC
drives, consider the use of solid state assemblies for control functions. |
|
| Rate this Book: |
| DC Choppers |
|
| A dc chopper is a dc-to-dc voltage converter. It is a static switching electrical appliance that in one electrical conversion, changes an input fixed dc voltage to an adjustable dc output voltage without inductive or capacitive intermediate energy storage. |
|
| Rate this Book: |
| Construction Of A 3-Phase Induction Motor |
|
| To study the construction of a 3-phase induction motor, To study the different starting methods of 3-phase induction motors
To study how to reverse the direction of rotation in a 3-phase induction motor. |
|
| Rate this Book: |
| Basics For Practical Operation Motor Starting |
|
| This technical manual for ‘Motor Starting’ is another publication on the subject of
‘Motor Management’. With these published fundamentals, of Motor Management, the user will have a growing
reference on the performance and operational data required for design and application. |
|
| Rate this Book: |
| AC Voltage Regulators |
|
| AC voltage regulators have a constant voltage ac supply input and incorporate semiconductor switches which vary the rms voltage impressed across the ac load. These regulators fall into the category of naturally commutating converters since their thyristor switches are commutated by the alternating supply. This converter turn-off process is termed line commutation. |
|
| Rate this Book: |
| AC Voltage Controller Circuits |
|
| AC voltage controllers (ac line voltage controllers) are employed to vary the RMS value of the alternating voltage applied to a load circuit by introducing Thyristors between the load and a constant voltage ac source |
|
| Rate this Book: |
