Read e-book online Basics of AC Drives(en)(104s) PDF

Read or Download Basics of AC Drives(en)(104s) PDF

Similar nonfiction_1 books

New PDF release: FHM [UK] (December 2015)

FHM united kingdom is formally the easiest journal on planet Earth; that includes the most well liked women, the funniest jokes, and the best cucumbers. It’s the one-stop vacation spot for way of life suggestion for today’s discerning gent, jam-packed with worthwhile tales on type, meals, soccer and different great things starting with F.

Download e-book for iPad: The Knot Guide to Wedding Vows and Traditions: Readings, by Carley Roney

From the number 1 marriage ceremony model comes this essential source, thoroughly revised and up to date, that will help you pick out the right phrases, tune, and traditions on your rite and reception
The rite is the cornerstone of your marriage ceremony party. There are numerous how one can make it your individual, from significant poetry readings to the song that performs as you stroll down the aisle.

The Knot advisor to marriage ceremony Vows and Traditions is a crucial source for brides and grooms. New and multiplied issues during this variation include:
-Interfaith ceremonies and mixing non secular traditions
-Ways to take advantage of know-how to reinforce your ceremony
-New on-line assets for locating the right phrases in your vows, software, and extra
-Gay marriages and civil unions
-Popular tune offerings which are already thought of classics

Throughout, you’ll additionally discover a wealthy and encouraging number of either vintage and unique rules for:
-Religious or secular vows and readings
-Traditions and symbolic rituals
-Speeches and toasts
-Music for the processional, recessional, and the detailed dances on the reception

Read e-book online A Companion To The Early Middle Ages-Britain And Ireland PDF

Drawing on 28 unique essays, A better half to the Early center a while takes an inclusive method of the background of england and eire from c. 500 to c. 1100 to beat synthetic differences of recent nationwide obstacles.  A collaborative background from prime students, masking the major debates and matters Surveys the construction blocks of political society, and considers no matter if there have been primary adjustments throughout Britain and eire Considers power elements for switch, together with the economic climate, Christianisation, and the Vikings

Extra resources for Basics of AC Drives(en)(104s)

Example text

Many motors are not capable of operating continuously at 100% continuous torque at low frequencies. Each motor must be evaluated before selecting it for use on an AC drive. * Torque may be higher than 150% if the drive is capable of higher current. 39 Basic AC Drives AC drives, inverters, and adjustable frequency drives are all terms that are used to refer to equipment designed to control the speed of an AC motor. The term SIMOVERT is used by Siemens to identify a SIemens MOtor inVERTer (AC drive).

The amount of time required to stop a motor depends on the inertia of the motor and connected load. The more inertia the longer it will take to stop. 64 DC injection braking The DC injection braking mode stops the rotating magnetic field and applies a constant DC voltage to the motor windings, helping stop the motor. Up to 250% of the motor’s rated current can be applied. This is similar to removing your foot from the accelerator and applying the brakes to bring the car to a stop quickly. Compound braking Compound braking uses a combination of the controlled deceleration ramp and DC injection braking.

Various devices can be used such as thyristors, bipolar transistors, MOSFETS, and IGBTs. The following schematic shows an inverter that utilizes bipolar transistors. Control logic (not shown) uses a microprocessor to switch the transistors on and off providing a variable voltage and frequency to the motor. Converter DC Link Inverter L1 SCR Transistor L1 L2 C1 L3 3Ø Motor This type of switching is often referred to as six-step because it takes six 60° steps to complete one 360° cycle. Although the motor prefers a smooth sine wave, a six-step output can be satisfactorily used.

Download PDF sample

Basics of AC Drives(en)(104s)

by Charles

Rated 4.51 of 5 – based on 11 votes