420 V, three-phase 60 Hz, star connected, induction machine has the following parameters: = 0.15 Ohms, Rr= 0.25 Ohms, Xls =0.8 Ohms, Xlr = 1.3 Ohms, the rated speed is 1,755 rpm. The magnetising anch can be neglected along with the mechanical and iron losses.

Q: Please answer question 1

A: a.) No Load voltage (Ea)Ea = V + IaRa Where:Ea = No load voltageV = Terminal voltageIa = Armature…

Q: What are the advantages and disadvantages of using the following types of motors?   split-phase…

A: Split-phase motor Advantage: cost; Disadvantage: moderate starting torque     Shaded-pole motor…

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A: We have an variable speed drive and reversing under no load with , Given data from figure, Speed…

Q: B.The resistance and standstill reactance of each phase of a 3-phase induction motor with…

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A: In induction motors, the operation involves the interaction of two currents:Power Current: This is…

Q: 3 phase induction motor has max. torque of 250% and the starting torque of the 150% with respect to…

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Q: x 7) Breakdown torque is...? a. The point at which the rotor loses synchronization The point at…

A: 7 Breakdown torque is ....The point at which the rotor loses synchronization.Explanation - Breakdown…

Q: three-phase induction motor, operating at rated voltage and frequency, has a starting torque of 1.35…

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Q: Please answer question 2

A: 1. a. No-Load Voltage (Ea)Ea​=V+Ia​Ra​WhereEa = No Load Voltage/Induced EMFV = Terminal VoltageIa =…

Q: A 4-pole, 50 hz, 3-phase induction motor has a slip-ring rotor with resistance and standstill…

A: It is given that:

Q: On full load, a 300 V series motor takes 90A and runs at 15 rev/s. The armature resistance is 0.1…

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Q: The standstill reactance of each phase of a three-phase induction motor with star-connected rotor…

A: Working principal  When an AC supply is given to the stator of the Induction motor, it generates a…

Types of Braking

A brake is a mechanical device that absorbs energy from a moving system and inhibits its motion. It helps to slow or stop a moving vehicle, axle, wheel, etc. The braking system uses friction between two types of surfaces that are pressed together that convert kinetic energy into heat energy. For instance, we know that in the case of regenerative braking, the brakes convert energy into electrical energy which can be used for later use. The conversion of kinetic heat energy into potential energy is stored in the form of pressurized oil or air. In the brake disc, oil, or fin, the eddy current brakes convert kinetic energy into the electric current with the help of a magnetic field which is converted into heat.Generally, such braking systems apply to the moving axles of wheels. They may also take other forms like moving fluids' surface. In the case of drag racing cars, both wheel brakes are used whereas in parachute or airplanes, both wheel brakes or drag flaps raised in to the air are used.