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QUICK QUIZ: 1. As excitation current was decreased from 1.0 amps to pull-out, the stator current:...
04- Chapter 8 Synchronous Motors Referring to the v curves in Figure 8 13,the machne is at 50% load with a Unity Power Factor Mark the operating point on the V-curve and estimate or determine The...
04- Chapter 8 Synchronous Motors Referring to the v curves in Figure 8 13,the machne is at 50% load with a Unity Power Factor Mark the operating point on the V-curve and estimate or determine The excitation voltage to maintain unity power factor is the machine is loaded to 50% (a) (b'"the load is increased to 100% and the field current is not changed, will the machine pull out of (c) tfthe load is increased to 15% and the field...
Test 3-ENT 371 Electric Machines-Ch 7,8,9 Name: 04- Chapter 8 Synchronous Motors Referring to the V curves in Figure 8.13, the machine is at 50% load with a Unity Power Factor. Mark the operating...
Test 3-ENT 371 Electric Machines-Ch 7,8,9 Name: 04- Chapter 8 Synchronous Motors Referring to the V curves in Figure 8.13, the machine is at 50% load with a Unity Power Factor. Mark the operating point on the V-curve and estimate or determine: (a) The excitation voltage to maintain unity power factor is the machine is loaded to 50%? (b) If the load is increased to 100% and the field current is not changed, will the machine pull out of synchronism?...
A three-phase 60 Hz synchronous generator is operating at unity power factor, with the following conditions: line-line voltage stator current field current torque angle Determine: (i) the magnitude o...
A three-phase 60 Hz synchronous generator is operating at unity power factor, with the following conditions: line-line voltage stator current field current torque angle Determine: (i) the magnitude of the induced voltage E, and (ii) the value of the synchronous inductance L 13k V 1000A 80A (a) (b) I s now desired to supply 8MVARs (lagging) while maintaining the same real power as above. Sketch the phasor diagram showing E. V, and I for this case, and determine numerical values...
please solve the multiple choices [17-18-19-20] (a) What kind of rotor construction is used in this machine? Cylindrical or salient pole rotor? Why? (b) The field current and the mechanical in...
please solve the multiple choices [17-18-19-20]
(a) What kind of rotor construction is used in this machine? Cylindrical or salient pole rotor? Why? (b) The field current and the mechanical input power are adjusted so that the machine delivers 15 k W at 0.9 lagging power factor. Is it a generator or motor? Draw the per- phase equivalent circuit of machine. (c) Determine the excitation voltage and the power angle (degree) Problem 1. (10 Points) A 3-phase, 20 kVA, 460...
please answer 13.16 at rated load of unity power factor and rated terminal voltage, determine efficienc...
please answer 13.16
at rated load of unity power factor and rated terminal voltage, determine efficienc including field rheostat loss. Ans. 93.139 13.11 A generator under test is rated at 100 KVA, 3-phase, 60-Hz; 2,400 volts. (a) If driven b a de motor unexcited, the motor output is 1.26 KW. (b) If driven by a de motor, generato on open circuit and excited to generate rated potential, the motor output is 2.5 KW. ( Ifdriven by a de motor, generator...
Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronou...
Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronous motor with a wound-rotor field has the following parameters: R is negligable.x,-457 Ω at a--2m50 rad/s Machine 2: A salient pole rotor is designed for the same stator yielding the following motor parameters. R is negligable .Х.: 1.3 ถ. X.. 457 at a-.. 2 50 rad /s Find a) Find the back-EMF voltage E, current I, and torque angle δ for both machines at...
need ans for the following questions, the last 3 pages for more info. Questions: more info:...
need ans for the following questions, the last 3 pages for more
info.
Questions:
more info:
expermint e/m avr=1.71033*10^11
7 2 points of the following options, which conditions for V or I produce the largest radius of the electron beam path r? Hint: Use e/m= 2V (5/4)*aP/(Nuo Ir) Maximum land Maximum V O Maximum land Minimum V Minimum I and Maximum V Minimum I and Minimum V 8 2 points By what factor will change if the radius of the...
How can we assess whether a project is a success or a failure? This case presents...
How can we assess whether a project is a success or a
failure?
This case presents two phases of a large business transformation project involving the implementation of an ERP system with the aim of creating an integrated company. The case illustrates some of the challenges associated with integration. It also presents the obstacles facing companies that undertake projects involving large information technology projects. Bombardier and Its Environment Joseph-Armand Bombardier was 15 years old when he built his first snowmobile...
04- Chapter 8 Synchronous Motors Referring to the v curves in Figure 8 13,the machne is at 50% load with a Unity Power Factor Mark the operating point on the V-curve and estimate or determine The excitation voltage to maintain unity power factor is the machine is loaded to 50% (a) (b'"the load is increased to 100% and the field current is not changed, will the machine pull out of (c) tfthe load is increased to 15% and the field...
Test 3-ENT 371 Electric Machines-Ch 7,8,9 Name: 04- Chapter 8 Synchronous Motors Referring to the V curves in Figure 8.13, the machine is at 50% load with a Unity Power Factor. Mark the operating point on the V-curve and estimate or determine: (a) The excitation voltage to maintain unity power factor is the machine is loaded to 50%? (b) If the load is increased to 100% and the field current is not changed, will the machine pull out of synchronism?...
A three-phase 60 Hz synchronous generator is operating at unity power factor, with the following conditions: line-line voltage stator current field current torque angle Determine: (i) the magnitude of the induced voltage E, and (ii) the value of the synchronous inductance L 13k V 1000A 80A (a) (b) I s now desired to supply 8MVARs (lagging) while maintaining the same real power as above. Sketch the phasor diagram showing E. V, and I for this case, and determine numerical values...
please solve the multiple choices [17-18-19-20]
(a) What kind of rotor construction is used in this machine? Cylindrical or salient pole rotor? Why? (b) The field current and the mechanical input power are adjusted so that the machine delivers 15 k W at 0.9 lagging power factor. Is it a generator or motor? Draw the per- phase equivalent circuit of machine. (c) Determine the excitation voltage and the power angle (degree) Problem 1. (10 Points) A 3-phase, 20 kVA, 460...
please answer 13.16
at rated load of unity power factor and rated terminal voltage, determine efficienc including field rheostat loss. Ans. 93.139 13.11 A generator under test is rated at 100 KVA, 3-phase, 60-Hz; 2,400 volts. (a) If driven b a de motor unexcited, the motor output is 1.26 KW. (b) If driven by a de motor, generato on open circuit and excited to generate rated potential, the motor output is 2.5 KW. ( Ifdriven by a de motor, generator...
Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronous motor with a wound-rotor field has the following parameters: R is negligable.x,-457 Ω at a--2m50 rad/s Machine 2: A salient pole rotor is designed for the same stator yielding the following motor parameters. R is negligable .Х.: 1.3 ถ. X.. 457 at a-.. 2 50 rad /s Find a) Find the back-EMF voltage E, current I, and torque angle δ for both machines at...
need ans for the following questions, the last 3 pages for more
info.
Questions:
more info:
expermint e/m avr=1.71033*10^11
7 2 points of the following options, which conditions for V or I produce the largest radius of the electron beam path r? Hint: Use e/m= 2V (5/4)*aP/(Nuo Ir) Maximum land Maximum V O Maximum land Minimum V Minimum I and Maximum V Minimum I and Minimum V 8 2 points By what factor will change if the radius of the...
How can we assess whether a project is a success or a
failure?
This case presents two phases of a large business transformation project involving the implementation of an ERP system with the aim of creating an integrated company. The case illustrates some of the challenges associated with integration. It also presents the obstacles facing companies that undertake projects involving large information technology projects. Bombardier and Its Environment Joseph-Armand Bombardier was 15 years old when he built his first snowmobile...
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