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Stator Current Control Methods
The torque and speed of an induction motor can be controlled by the stator current the motor behaviour is different from that with VSI. A constant current for 3-? induction motor can be obtained from 3-? current source inverter but the use of CSI has the disadvantage that it generates the harmonics in the system. The circuit of stator current control methods for controlling the speed of induction motor is shown in figure.
Figure shown 3- phase controlled rectifier gives controlled dc voltage which converters into constant current by using inductor I current source inverter is used to emulate the output frequency and therefore speed of 3-? induction motor. Figure shown 3-phase uncontrolled rectifier gives uncontrolled dc voltage which is regulated by chopper and then it is converted to constant current by inductor then CSI controls the speed 3-phase induction motor.
A squirrel-cage inductionmotor operates at a slip of 0.05 at full load. The rotor current at starting is five times the rotor current at full load. Neglecting stator resistance and
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Note, the armature current is produced in pulses as the armature rotates under the poles, so the torque also pulsates. This can give rise to extra wear on bearings and the engin
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Distribution: This has been recognized as the most critical segment of the electricity business. Here the NEP calls for proper restructuring of distribution utilities for achi
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The Thevenin equivalent circuit at the terminals of R2 / S for a 60 hz, 6 pole induction motor is shown below. a) Find the value of the slip for maximum torque and the maximum t
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