The Management of Electrical Machinery by Francis Bacon Crooker

By Francis Bacon Crooker

Show description

Read Online or Download The Management of Electrical Machinery PDF

Similar power systems books

Fundamentals of Power Electronics

In lots of college curricula, the facility electronics box has developed past the prestige of comprising one or special-topics classes. frequently there are numerous classes facing the ability electronics box, overlaying the themes of converters, motor drives, and tool units, with in all probability extra complex classes in those components besides.

Electric Motors and Drives. Fundamentals, Types and Applications

Electrical automobiles and Drives is meant for non-specialist clients of electrical automobiles and drives, filling the distance among maths- and theory-based educational textbooks and the extra prosaic 'handbooks', which supply beneficial aspect yet little chance for the improvement of actual perception and knowing.

Lord Kelvin : his influence on electrical measurements and units

Kelvin's nice accomplishment used to be to compile the entire experimental scientists of his time into one co-operative organization for investigators whose person efforts have been aided through their mixed effects, expressed in a notation and defined in language understood by way of each person. summary: This ebook concentrates upon the paintings of Lord Kelvin (William Thomson) in 3 stages; discovery of the basic strategies and coding them into common legislation, major the adoption of the metric approach, and securing world wide use of devices and criteria (now the IEC system).

Additional resources for The Management of Electrical Machinery

Sample text

Front-Connected Double-Pole Knife Switch. stiffness and proper carrying capacity, and their contact surfaces must not be less than i square inch per 75 amperes of maxihinges and contact jaws must be good contact with the blades. The blades and jaws must be so shaped that they open along their entire length simultaneously; otherwise the arc formed upon opening a loaded circuit, will burn off the last points of contact. In fact mum current to be carried. springy enough to insure The when produced by a heavy current, is very difficult to control; so that switches should never be opened on heavily loaded In practice some form of electrocircuits except in an emergency.

Both are provided with pins, which are connected by Besides taking springs. care of differences in align- ment, a flexible coupling tends to reduce fluctuations in angular velocity due to gas or steam engines, especially if the armature is heavy or has a fly-wheel attached. An ordinary friction clutch or a magnetic clutch is a convenient FIG. ii. Flexible Shaft Coupling. means for directly coupling an engine and generator. It is easily applied, being especially designed to connect two shafts together, and has the advantage over almost any other coupling of being readily disconnected, so that one or more generators can be stopped without interfering with the engines.

Friction Drive. One of the simplest means of driving a the pulley to press against the fly-wheel of what is known as a friction engine or other mover, thus obtaining machine is to cause its 5' -AT FIG. 1 6. Single Worm roR as f> MOTOR Gear Connecting Motor and Hoisting Drum. This has the advantages of simplicity, compactness; it can be designed for any reasonable ratio of speeds, and is instantly thrown out of gear by merely moving the machine a small fraction of an inch on its sliding base. In all these respects nothing could be more desirable but friction gearing has not been very extensively drive.

Download PDF sample

Rated 4.11 of 5 – based on 30 votes

Related posts