DC Distribution System: It is a common knowledge that electric power is almost exclusively generated, transmitted and disÂtributed as a.c. However, for certain applications, d.c. supply is absolutely necessary. For instance, d.c. supply is required…
Condition for Reciprocal Two Port Network: If the ratio of voltage at one port to the current at other port is same to the ratio if the positions of voltage and current are interchanged, then…
Superposition Theorem Formula: The Superposition Theorem Formula also can be used to analyses ac circuits containing more than one source. The superposition theorem states that the response in any element in a circuit is the…
Two Reaction Model of Salient Pole Synchronous Machine: In a Two Reaction Model of Salient Pole Synchronous Machine, the flux established by a mmf wave is independent of the spatial position of the wave axis…
Voltage to Current Converter Circuit: Occasionally in industrial electronics, it is necessary to provide a current proportional to certain voltage, even though the load impedance may vary. A circuit which can perform this job, is…
Drive Circuits for Stepper Motor: A Drive Circuits for Stepper Motor is usually driven from a low voltage dc source. When a phase is to be energised, the dc source is connected to the phase…
Variable Reluctance Stepper Motor: Variable reluctance stepper motor can be of single-stack or multi-stack type. Single Stack Variable Reluctance Motor: A variable reluctance stepper motor has salient pole (or tooth) stator and rotor. While rotor…
Rotor Overheating Protection Diagram: Rotor Overheating Protection is provided only in case of large generators. It indicates the level of temperature and not the actual hot spot temperature. In the arrangement shown in Fig. 11.20,…
Output Current Limiting: Because the output transistors can be destroyed by excessive current flow, output current limiting circuits are often included in a power amplifier. Figure 18-27 shows the typical arrangement for a current limiting…
Difference between I/O Mapped I/O and Memory Mapped I/O: The difference between I/O Mapped I/O and Memory Mapped I/O is given below I/O Mapped I/O - Data transfer between the processor and the input/output devices…