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  1. Alternating Current Motors (AC Motors)

    Alternating Current Motors (AC Motors) AC motors are considered as a significant portion of the world's electric load. Nowadays, industrial and domestic usages of AC motors … According to principle of operation: Synchronous Motor Induction motor …

  2. Multiplexing

    … (FDM) Time-Division Multiplexing (TDM) Synchronous TDM A-Synchronous TDM These … the modulation and demodulation signals. The figure No.8.3 illustrates the FDM multiplexing process. The … //--> //--> //--> 2. Asynchronous TDM In asynchronous TDM, each slot in a …

  3. Principle Of Operation Of Three-phase Induction Motor

    … produced on these conductors tending to rotate them. Synchronous Speed The rotating speed of the stator … r.p.m. F = Supply frequency in cycles per second. P = No. of poles of stator. Rotor Speed The actual … N ) / Ns Or Ns - N = S Ns = S (120f/P) --- (2) Comparing equation (1) & (2) we get: S (120f / …

  4. Clamping Circuits

    … Diode Clampers POSITIVE CLAMPER Fig 2 shows the circuit of a positive clamper It consists of a … the circuit of negative clamper with positive bias. With no input signal the capacitor charges to the battery voltage … connections as shown in Fig 5(b) ASYNCHRONOUS AND SYNCHRONOUS CLAMPING Clamping circuit discussed above …

  5. Three Phase Induction Motors

    Three Phase Induction Motors 3 Phase induction motors are most widely … permanently short-circuited on themselves at the end. Hence no any extra resistance can be added to it. The slots of the … and is equal to Øm. the resultant vector rotates at synchronous speed. Three Phase Supply Consider a …

  6. Shift Registers

    … of one of the flip flop forms in input to other, it is known as a shift register. The data in a shift register is … in each stage after each of four shift pulses. Notice table 2 how the logical 1 input first shifts into stage A and then … reset for the next shift operation. Asynchronous and Synchronous Shift Registers Asynchronous circuits …

  7. Torque

    … this force in one revolution = Force x distance = F x 2 Δr Jouls Let N = revolution per seconds. P = … can write: T = K 1 Ø I 2 Cos Ø2 where K 1 = another constant. STARTING TORQUE (Ts) The torque … as compared to its reactance. Hence starting torque of such motors are very poor. Such motors are not useful where the …

  8. CO2 Laser (The molecular gas laser)

    CO2 Laser (The molecular gas laser) The CO 2 stands for carbon dioxide. In CO 2 laser the laser light takes place within the molecules … the type of molecular gas laser. Importantly note that CO 2 lasers use carbon dioxide as well as …

  9. SCR In Parallel

    … to increase their common current capability. If SCRs are not perfectly matched, this results in an unequal sharing of … V-I characteristics of two SCRs, SCR 1 and SCR 2 . The ratings of the SCRs are the same. When these SCRs … gradual start-up and reduces inrush current in large motors and transformers. Battery chargers - Parallel …

  10. SCR in Series

    … forward-blocking capability. However, it's important to note that the characteristics of two SCRs, even those of the … SCR2 ( V 1 ) is higher than that across SCR 2 ( V 2 ) because the leakage current for SCR 1 is … gradual start-up and reduced inrush current for large motors and transformers. Snubber circuits - Small …