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Types of DC Motor

Types of DC Motor: The commonly used Types of DC Motor are shown in Fig. 5.1. In a separately excited motor, the field and armature voltages can be controlled independent…

Current Limit Control of Drives

Current Limit Control of Drives: Current Limit Control of Drives scheme of Fig. 3.3 is employed to limit the converter and motor current below a safe limit during transient operations.…

Fiber Optics History

Fiber Optics History: Fiber Optics History - In 1870 John Tyndall, a natural philosopher living in England, demonstrated one of the first guided light systems to the Royal Society. His…

Sawtooth Waveform in Beam Scanning

Sawtooth Waveform in Beam Scanning: As previously discussed, one complete frame of a TV picture is scanned 30 times per second, in a manner very similar to reading this page.…

Monochrome Television Transmitter

Monochrome Television Transmitter: As shown in the block diagram of Figure 17-2, a Monochrome Television Transmitter system is quite unlike any of the transmission systems studied previously. This section will…

Phased Array Radars

Phased Array Radars: Phased Array Radars - Introduction With some notable exceptions, the vast majority of radars have to cover an area in searching and/or tracking, rather than always being…

Doppler Effect in Radar

Doppler Effect in Radar: The apparent frequency of electromagnetic or sound waves depends on the relative radial motion of the source and the observer. If source and observer are moving…

Digital Communications Articles

Digital Communications Articles: Digital Fundamentals: The meaning of the term “digital” is fundamental to an understanding of the benefits of digital technology. Digital Fundamentals data must be compared with analog…