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Difference Between Squirrel Cage And Wound Rotor Induction Motor Pdf

пятница 12 октября admin 96

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Schematic symbol of a slip ring motor A wound-rotor motor is a type of where the windings are connected through to external resistance. Adjusting the resistance allows control of the speed/torque characteristic of the motor.

Wound-rotor motors can be started with low inrush current, by inserting high resistance into the rotor circuit; as the motor accelerates, the resistance can be decreased. Compared to a, the rotor of the slip ring motor has more winding turns; the induced voltage is then higher, and the current lower, than for a squirrel-cage rotor. During the start-up a typical rotor has 3 poles connected to the slip ring. Each pole is wired in series with a variable power resistor.

Jan 13, 2018 - Hello, Does anyone know the main difference between a Slip Ring Induction Motor and a Squirrel Cage Induction Motor? Also does the Stator. Both squirrel cage and wound-rotor, and induced current flows. At what speed will the induction motor run? The difference between the motor speed.

Rotor

When the motor reaches full speed the rotor poles are switched to short circuit. During start-up the resistors reduce the field strength at the stator. As a result the is reduced. Another important advantage over squirrel-cage motors is higher starting torque. The construction of slip ring induction motor is quite different compared to other induction motor. Slip rings Induction motor provides some advantages like provides high starting torque, low starting current and it improves the power factor.

We can add external variable resistance to the rotor of this type of motor. So, we are able to control the speed of this type of motor easily. A wound-rotor motor can be used in several forms of.

Certain types of variable-speed drives recover slip-frequency power from the rotor circuit and feed it back to the supply, allowing wide speed range with high energy efficiency. Use the slip rings to supply external power to the rotor circuit, allowing wide-range speed control.

Today speed control by use of slip ring motor is mostly superseded by induction motors with. References [ ].