MGT 607 Module 1 Assignment 1 – External Analysis

1. As an electric drivetrain engineer, how do you design the battery pack to meet therequirement of voltage and capacity?

80.5% O A series motor runs at (800 r.p.m) when the voltage is (400 V) and the current is (25 A). The armature resistance is (0.4 Q) and the series field resistance is (0.2 Q). Determine the resistance to be connected in series to reduce the speed to (600 r.p.m) with same current 3.85 O 4.25 2.85 O A shunt generator is running at 1000 rpm. If flux is reduced by half, then what is

A motor is required for an industrial air extraction system.The fan speed should be constant between 0 rpm and 2900 rpm, say two speeds.The maximum torque to nominal torque ratio should be no more than 4.0, the torque rating should be at around 100 Nm. The power factor should not be lower than 0.8 for power factor correction reasons.A 100A miniature circuit breaker (MCB) will be used to protect the motor.The enclosure should meet IP55 standard, and the feet are to be bolted to the stator and made of cast iron. From the ABB motors data sheet link attached select a suitable motor, giving the motor type number.   A motor is also required for an industrial wood chipper. From the ABB motors data sheet link attached select a suitable motor, giving the motor type number   https://library.e.abb.com/public/7b37518ea1d0cb94c1257b130056f26d/General%20performance%20motors%20EN%2002_2010.pdf

A motor is required for an industrial air extraction system. The fan speed should be constant between 0 rpm and 2900 rpm, say two speeds. The maximum torque to nominal torque ratio should be no more than 4.0, the torque rating should be at around 100 Nm. The power factor should not be lower than 0.8 for power factor correction reasons.A 100A miniature circuit breaker (MCB) will be used to protect the motor. The enclosure should meet IP55 standard, and the feet are to be bolted to the stator and made of cast iron. From the ABB motors data sheet link attached select a suitable motor, giving the motor type number.     https://library.e.abb.com/public/7b37518ea1d0cb94c1257b130056f26d/General%20performance%20motors%20EN%2002_2010.pdf

output of 30 hp. The equivalent circuit parameters of the motor are, R = 0.12 2, R = 0.07 2, X1 = 0.25 N, X, = 0.25 2, and XM = 20 2. The mechanical loss of the induction machine is 500 W and the core loss is 400 W. The slip of the machine is 0.04. Determine the overall machine efficiency. a) 88.57% (b) 91.26% c) 86 17%

A 200V, 875rpm, 150 A separately excited dc motor has an armature resistance of 0.06Ω. It is fed from a single phase fully controlled rectifier with an ac source voltage of 220V, 50Hz. Assuming continuous conduction. Determine motor speed for α = 160o and half rated torque.

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IL IA RA RF IF nm + EA Tout т Field Armature Using the following values: VT = 190 V, IL = 110 A, RA = 0.102, RF = 802, Speed 1,250 rpm, and HP=19, determine the output torque in Nm. %3D Show two decimal places. Attach your work to support your answer. (Recall the basic machine equations EA = Kpwm, Tdev = Kpla, and P = Twm: Also, Wm = 2nm/60 and 1 HP = 746 W.) %D Your Answer: Answer

I have an assignment of topic: construction of DC Machine I need to write theory discussion with some figures

Do C (i), (ii) and (iii) calculation

The figure below shows a stepper motor. Determine the step angle for Full and Half stepping operation: Phase 4 N Phase 3 N pole S pole H Phase 1 S N Rotor Phase 2 This portion of the exercise you need not submit for this assignment. But educating yourself with this might help in the 3rd exam. Assuming, a logic-1 power (signal) to a phase produces South pole on the stator facing the rotor, give the powering sequence of the stator windings for one full rotation of the rotor in Full and Half step modes.

Q4/ Chose the correct answer for the following 1. In BLDC motor field winding is kept on a) Stator b) Rotor c) Can be placed anywhere d) Absent 2. By electronic circuitry BLDC can be controlled for both constant and variable torque operation. a) True b) False 3. In medical fields which DC motor is widely used? a) PMDC b) BLDC 4. Construction of BLDC is exactly similar to the a) Conventional DC motor c) Permanent magnet synchronous motor b) Induction motor 5. Typical brushless motor doesn't have a) Commutator b) Permanent magnet 6. The sensor most commonly used in the BLDC motor is a) Thermo Sensor b) Relay Sensor c) Brushed DC motor d) Cannot be determined d) Totally different construction c) Electronic controller d) Fixed armature c) Hall Sensor d) Power Sensor

A 200 V,875 rpm, 150 A separately excited dc motor has Ra= 0.06 Ohm and La= 2.85 mH. It is fed from a single phase fully-controlled  rectifier with an ac source voltage of 220 V, 50 Hz. For alpha=120֩, critical speed=-505.5 rpm and β = 230֩.   Find out if the conduction is continuous or discontinuous graphically (using speed torque characteristic) for alpha=120֩ and speed=-300 rpm. Calculate Motor torque for alpha=120֩ and speed =-300 rpm.

A 25kW, 120V separately excited dc machine has an armature resistance of  Ra =0.025 ohms. When operated with a constant field current and constant speed of 2500rpm, the open circuit armature voltage is 120V. If the dc machine is connected to a 125V supply, determine                                             (i)Whether the dc machine is operating as a generator or a motor.                   (ii)The armature current     (iii)The supply power   (iv)The developed power.     (v)The developed torque.

The following parameters are known about a de machine: KE KT 0.8 Vs (machine constant) Ra=0.5 Q (armature resistance) It is run as a motor at the following speed and torque TL=2 Nm wm-200 rad/s The machine is connected to a 1 quadrant converter. The input voltage to the converter is 300 V. What is the required duty cycle? 0.533 O 0.530 0 0.540 0.538

The following information is given for a 300kW, 600V, long shunt compound DC generat or, shunt field resistance is 75 ohms, armature resistance 0.01, brush resistance is 0.011 ohrms, series field resistance is 0.012 ohms and the divert or resistance of 0.036 ohms.When the machine is delivering full load; a. Draw the circuit diagrarn b. Calculate the voltage and C Power generated by the armat ure.