BDE-Electrical/Electronic

Self-protecting starters (SPSs) were first introduced to the U.

A typical linear encoder consists of a scanning unit and a scale.

Power-circuit modules containing several power semiconductor switching devices can reshape ac power into other required forms and often have current ratings from 30 to 50 A.

Incandescent miniature and subminiature lamps are used in applications requiring high brightness, a wide viewing angle, and a variety of display colors.

Input/output devices are the interface between the controller and the controlled system.

Electric motors, both ac and dc types, come in many shapes and sizes.

A critical aspect of power supplies is dc supply-voltage stability.

A synchronous and synchronous motors are the two main categories of ac motors.

Several types of wire conductors are used to connect electrical systems.

Terminal selection depends on the type of wire used, operating environment, and factors such as current levels and local electrical codes.

The first linear motor was conceived by Wheatstone more than 100 years ago.

For maximum power transfer, switch contacts should have zero resistance.

Common dry batteries -- the type used in flashlights, toys, and portable instruments -- come in three grades.

In control applications, operational power supplies are alternatives to other sources, ranging from simple SCR bridges used in electric drills to elaborate servoamps.

Power-control modules are circuits comprising devices such as silicon-controlled rectifiers, triacs, power transistors, and power rectifier diodes.