Laboratory excise design

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lnebbj

Engineering

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This's electrical engineering power system Lab design. Please rewriting lab report that already has been written. All i need is to rewrite again and change all the words and change the whole thing.

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Laboratory Exercise Lab Design Proposal 1|Page Objectives: • Wiring the synchronous motor properly. • Analyze the performance of a synchronous motor. • Observe the performance of the motor under different loads. • Measure the efficiency at different loads. • Observe the effect of varying field current on the power factor and the armature current at different three loads. • Plot the V-curve of the synchronous motor. • Compare theoretical and experimental values. Instruments and Components: 1) 3-phase power supply. 2) Multifunction power analyzer. 3) Servo Machine Test System. 4) Switch 4-pole. 5) Synchronous machine. 6) Variable isolator/ exciter. 7) Digital Ammeter. Procedures and Step by Step: Wiring the circuit: 1. Connect the 3-phase power supply to the multifunction power analyzer. 2|Page 2. Connect the multifunction power analyzer to the switch 4-pole. 3. Connect the switch 4-pole to the synchronous machine and make sure to connect the machine in Y configuration. 4. The isolator is connected the ammeter, the ammeter is connected to the field’s windings. 5. Make sure to connect the safety sockets of the machine to the safety sockets Servo. 6. Ground all of power supply, multifunction analyzer, Servo, and the synchronous machine. Performance Under Load: 1. Apply voltage from the three-phase power supply. 2. Turn on the switch 4-pole. 3. Increase If to 0.5 A. 4. Make sure to use torque mode and press run. Then, start from 0 Nm. 5. Measure and record torque, speed, voltage, armature current, power factor, and input power. Then, calculate output power and efficiency. 6. Repeat the steps for different loads and do not exceed for pullout torque. 7. After finishing this test, disengage the Servo by pressing stop. Power Factor Control: 1. Use torque mode at 0 Nm and field current of 0.5 A, measure the field current, the armature current, and power factor. 2. Increase and decrease the field current and take measurements of If, Ia, and power factor each time you decrease If to create the V curve. 3. Repeat the steps with torque of 0.2 Nm and 0.5 Nm. 3|Page 4. Disengage the Servo by pressing stop button. 4. Analysis and Discussion: When using different loads in the first test, the speed and terminal voltage will be constant. The armature current, input power, and output power will change by changing the torque. Therefore, the efficiency will change. The pullout torque of the machine happens when the power is maximum. The equation for that is: Po (max)= (3𝑉𝑡 ∗ 𝐸𝑓 )/(𝑥𝑠 ) However, Vt and xs are constant. Therefore, to improve the pullout Ef needs to be increased. To do that, increasing If will increase Ef since Ef is proportional to If. To find Ef, the following equation was used: |EfLN| = |VtLN| - Ia*(j*Xs) When applying 0 torque, the value of Ia can be used in the equation to calculate EfLN. Then, the maximum power can be found from the equation above. The pullout torque is: Torquepullout = Pmax/w , where w is the speed in rad/s. For power factor control. When If is decreased, Ia will decrease then increase again. The expected graph is V. Where the right side of the V shape means that If is large and the power factor is leading. Then, when If is decreasing, Ia will decrease and the power factor will be close to unity. When If is decreased more, Ia will start increasing again, but the power factor will be lagging. As the torque increased for this test, the V shape will shift up which means the values of the armature current will be higher than at 0 Nm torque. 4|Page Appendix: 5|Page
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Attached.

1
LAB DESIGN PROPOSAL: THE SYNCHRONOUS MOTOR

Laboratory Exercise

Lab Design Proposal

the synchronous motor

2
LAB DESIGN PROPOSAL: THE SYNCHRONOUS MOTOR

Table of Contents
Objectives: ...................................................................................................................................... 3
Equipment’s .................................................................................................................................... 3
Methods and Procedures ................................................................................................................. 4
Connection of equipment’s (Circuitry) ....................................................................................... 4
Performance Under different Load conditions ............................................................................ 4
Power Factor Control .................................................................................................................. 5
Analysis and Discussion: ...................................................................................................


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