:A 1200rpm separately excited dc motor drives a rated load torque of 85NM. The field and armature resistances are 200 Q and 0.2 Q respectively. The field circuit is fed through a single phase semi-controlled ac-to-dc converter with zero degree firing angle. The armature circuit is fed through single phase fully controlled converter. Both converters are connected to 400V, 60HZ source. The motor voltage constant is 0.8 V-sec/A-rad. Determine the firing angle of the armature .converter at rated load

:A 1200rpm separately excited dc motor drives a rated load torque of 85NM. The field and armature resistances are 200 Q and 0.2 Q respectively. The field circuit is fed through a single phase semi-controlled ac-to-dc converter with zero degree firing angle. The armature circuit is fed through single phase fully controlled converter. Both converters are connected to 400V, 60HZ source. The motor voltage constant is 0.8 V-sec/A-rad. Determine the firing angle of the armature .converter at rated load

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.4P

See similar textbooks

Similar questions

Design a DC motor circuit to drive A fan-type load with a torque equation equal to: TL=1.34×10−7ω2TL=1.34×10−7ω2 N.m The fan speed range is from 500 to 1200 rpm. To achieve the required operation, the armature voltage of the motor is adjusted by a single-phase, full-wave, ac/dc converter. The input voltage and frequency to the converter are 480 V (rms) and 50 Hz. choose the motor type, show the motor rating, αα range, Supply voltage, and frequency, and any required other information Modify the design to automatically adjust the voltage drive the load within the specified speed range. show the control variable, controller type, connection, and controller weights.
Design a DC motor circuit to drive A fan-type load with a torque equation equal to: TL=1.34×10−7ω2TL=1.34×10−7ω2 N.m The fan speed range is from 500 to 1200 rpm. To achieve the required operation, the armature voltage of the motor is adjusted by a single-phase, full-wave, ac/dc converter. The input voltage and frequency to the converter are 480 V (rms) and 50 Hz. choose the motor type, show the motor rating, αα range, Supply voltage, and frequency, and any required other information Modify the design to automatically adjust the voltage drive the load within the specified speed range. show the control variable, controller type, connection, and controller weights. design the single-phase, full-wave, ac/ dc converter. show design specifications, the reason for DC motor selection. correct manual circuit, and correct automatic closed-loop control circuit
A 48kW, 600V, 1500 rpm separately excited dc motor is controlled by single phase semi-controlled converter. The resistance of the armature is 192 and of the field is 1450. The field circuit is controlled by a single phase fully controlled converter and its firing angle is set to 20. The AC supply voltage to the armature and field converters is a single phase 220V, 60 Hz. The voltage constant is 0.946 V/A rad/s. If the armature converter firing angle is 45 and the speed is 1200 rpm; calculate the armature current and the developed torque.
(a) Show the voltage waveforms across each half of the secondary winding and across RL when a 100 V peak sine wave is applied to the primary winding in Figure. (b) what is Vavg and fout if fin = 50 Hz?
What is use of solenoid coil in the pressure to converter? a. To produce magnetic field in the LVDT b. To change the LVDT output c. To bring back the pivoted beam normal position d. To produce linear displacement in bellows
A freewheeling DC motor is driven with 1000 rpm and a nominal load torque of 80Nm. The field circuit resistance is 200 and the armature circuit resistance is 0.2 O. The field coils are fed with a zero degree transmission angle through a single-phase fully controlled converter connected to a single-phase 240V source. The armature circuit is fed from a single phase 400V source through another fully controlled converter. Magnetic saturation has been neglected, the motor constant is given as 0.8 V - s / A - rad. Assuming that there is no fluctuation in armature and field current, find the control angle of the converter feeding the armature at nominal load. If you want to leave the question blank, click again on the option you marked.
A Flyback converter (for questions 1-3) shown below has the following parameters. Vin-100V, Vo-20v, Po-40W, D-0.25, Fsw-250kHz 1. What is the turns ratio N1:N2 between the primary side winding and the secondary side winding? A. NI: N2 - 5: 3 B. NI: N2 - 3:5 C. NI: N2- 5:2 D. None of the above
Q-1: A 1200rpm separately excited dc motor drives a rated load torque of 85NM. The field and armature resistances are 200 0 and 0.2 Q respectively. The field circuit is fed through a 1-phase semi-controlled ac-to-dc converter with zero degree firing angle. The armature circuit is fed through 1-phase fully controlled converter. Both converters are connected to 400V source. The motor voltage constant is 0.8 V-sec/A-rad. Determine the firing angle of the armature converter at rated load.
Untitled Section Jalis 6 In d.c. generators armature reaction is produced by field current O armature current commutating winding current none of the mentioned compensating winding current *.The use of d.c. generators eliminated the use of rectifiers and ac supplies True False O
1. The operation of Commutator in DC Motor is * O a) to convert dc to ac O b) to convert ac to dc O c) to convert fixed dc to variable dc O reverse the current direction in the rotating windings each half turn
A DC chopper is used in regenerative breaking mode of a dc series motor. The dc supply is 600 V, the duty cycle is 70%. The average value of armature current is 100 A. It is continous and ripple free. What is the value of power feedback to the supply ?
L-1). The 3-phase wound-rotor induction motor has .... . a) high starting torque b) low starting current c) both "a" and "b" d) neither "a" nor "b" L-2). The 3-phase wound-rotor induction.........a) motor has a wire wound rotor b) motor's rotor can be connected to an external resistive load by way of slip rings and brushes c) motor requires more maintenance than the 3-phase squirrel-cage induction motor d) all of the above L-3). The 3-phase wound-rotor induction motor's rotor circuit's resistance should be adjusted so it is__________ during starting. a) low b) high c) either "a" or "b" d) neither "a" nor "b" L-4). Will a 3-phase wound-rotor induction motor start with no external circuit connected to its rotor leads? a) yes b) no