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  1. Losses and Power Stages In Induction Motor

    Losses and Power Stages In Induction Motor Losses In Induction Motor There are three … in the winding. This loss is also called electrical or "1 2 R" loss. The winding resistance is found by … Tg = Rotor gross output / 2πN --- (1) If there were no Cu. Losses in the rotor, then rotor output will be equal …

  2. Three Phase motor control using SCR

    Three Phase motor control using SCR Controlling a three-phase motor using Silicon Controlled Rectifiers (SCRs), also known as Thyristors, is a common method for applications …

  3. Testing Of Induction Motor

    Testing Of Induction Motor Like other machines induction motors are … tests are made on induction motors: Direct test No-load test Blocked (or locked) rotor test Direct … by means of various meters connected as shown in Figure 1.   Figure 1: Direct or load test on 3 Phase …

  4. Parameters And Equivalent Circuit Of Induction Motor

    Parameters And Equivalent Circuit Of Induction Motor In an induction motor, the transfer of … the induction motor. STATOR CIRCUIT When voltage "V 1 " is applied to stator terminals, it drops partly in the … "I 1 " is the stator current and is the vector sum of the no-load current "I o " and rotor equivalent current I 21 …

  5. Silicon Controlled Rectifier - SCR

    … junction J1 J2 and J3 and also three terminals, the anode terminal of Silicon Control Rectifier SCR is connected … SCR is reduced and it turn OFF. Power Control of DC motor using SCR In the Given ckt a Single phase … voltage is at a constant value. In the ckt the SCR 1 & SCR 4 are triggered at same time in first cycle, while …

  6. SCR DC Motor control

    SCR DC Motor control The speed of DC motor can be control by using SCR in AC circuit as shown … SCR A and B rectifier, the o/p voltage of transformer T1 and apply this pulsating DC voltages to the armature …

  7. Principle Of Operation Of Three-phase Induction Motor

    Principle Of Operation Of Three-phase Induction Motor When 3-phase stator windings are fed by a … r.p.m. F = Supply frequency in cycles per second. P = No. of poles of stator. Rotor Speed The actual … Slip speed = 120fr / P Ns — N = 120fr / P --- (1) And S = (Ns — N ) / Ns Or Ns - N = …

  8. Three Phase Induction Motors

    … torque is lower than that of an equivalent DC shunt motor Its speed cannot be varied without sacrificing some … has different shapes. A typical shape is shown in Figure. 1: Figure 1: Stator Frame of Three-Phase Induction … permanently short-circuited on themselves at the end. Hence no any extra resistance can be added to it. The slots of the …

  9. Torque

    … acting on a body moving in a circle of radius "r", (Figure 1) is: T = Fxr If "F" is in Newton and "r" is in … = 2 Δ N T = P / ω --- (1) In case of induction motor, the power developed = E 1 I 2 CosØ2 where … can write: T = K 1 Ø I 2 Cos Ø2 where K 1 = another constant. STARTING TORQUE (Ts) The torque …

  10. Flip Flops

    … binary storage device. It can store binary bits either 0 or 1. It has two stable states HIGH and LOW i.e. 1 and 0. It … continuously disabling gate B so that any change in R has no effect. Also, the 1 state at Q is continuously … Q at 1. Consequently, when S returns to the 1 state it has no effect on the flip flop whereas a change in R will cause …