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Q. Show Applications for Synchronous Motors?
With constant-speed operation, power factor control, and high operating efficiency, three-phase synchronous motors are employed in a wide range of applications. An overexcited synchronous motor, known as a synchronous condenser, is used to improve the system power factor. Synchronous motors are used as prime movers of dc generators and variable-frequency ac generators. Typical applications include pumps, compressors, mills, mixers, and crushers. Single-phase reluctance motors find application in such devices as clocks, electric shavers, electric clippers, vibrators, sandpapering machines, and engraving tools. A hysteresis motor is employed for driving high-quality record players and tape recorders, electric clocks, and other timing devices. The horsepower range is up to 1 hp for hysteresis motors, and up to 100 hp for reluctance motors.
Use the offset diode model with a threshold voltage of 0.6 V to determine the value of v 1 for which the diode D will first conduct in the circuit of Figure(a).
Q. For the networks shown in Figure, determine the transfer function G(s) = V o (s)/V i (s).
Static Rotor Resistance Control Methods This method is used only for slip ring induction motor in SRIM 3- phase variable resistor can be inserted in the rotor circuit and
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