A power electronic converter used to drive a separately-excited DC motor for application in Sohar, Oman...
i. The speed of a separately excited dc motor is controlled by a one-phase full-wave converter. The field circuit is also controlled by a full-wave converter, see V supply) Vs pk-150V Ra-0.310 L Rf 152O E-63V α. 1-35A Figure 3 The AC supply voltage to the armature and field converters is one-phase, 150Vpeak, 50Hz. The armature resistance Ra-0.31Ω, the field circuit resistance Rf-152Ω, and the motor voltage constant is Kv-1.3V/A. The armature current corresponding to the load demand la-35A The...
3) A saperately excited DC motor has the following parameters: Ra = 10 Ke = 0.4 V/rpm. Wb O = 0.2 Wb The motor speed is controlled by a full-wave bridge rectifier. The firing angle is set at 45, and the average speed is 1500 rpm. The applied AC voltage to the input of the bridge rectifier is 220Vrms - 50 Hz. a) (10p) Please draw the complete circuit. (converter + motor) b) (10p) Please find the armature current. c)...
3) A saperately excited DC motor has the following parameters: Ra = 10 Ke = 0.4 V/rpm. Wb 0 = 0.2 Wb The motor speed is controlled by a full-wave bridge rectifier. The firing angle is set at 45°, and the average speed is 1500 rpm. The applied AC voltage to the input of the bridge rectifier is 220Vrms - 50 Hz. a) (10p) Please draw the complete circuit. (converter + motor) b) (10p) Please find the armature current. c)...
The speed of a separately excited de motor is controlled by a one-phase full-wave converter. The field circuit is also controlled by a full-wave converter and the field current is set to its maximum value. The AC supply voltage to the armature and field converters is one-phase, 400V, 50Hz. The armature resistance Ra 0.232, the field circuit resistance Rf- 1812, and the motor voltage constant is Kv 1.3V/A - rad/s. The armature current corresponding to the load demand Ia 42A...
(i) A 220 volts, 825 rpm, 125 A separately excited DC motor has an armature resistance of 0.05 2. It is fed from a single phase fully controlled rectifier with an ac source of 225 Volts, 50Hz. Assuming continuous conduction calculate (a) Firing angle for 1/4"hrated motor torque and 750 rpm (b) Motor speed for a=160 degrees and rated torque 5 Marks (ii) Draw and explain with neat circuit diagram of a DC drive circuit, which works with positive output...
solve it now please A 220 V, 1000 rpm, separately excited dc motor is fed from a three-phase controlled three-phase ac-dc converter through 220 V (line value-rms value), 50 Hz ac-source. It is required to apply 220 V (dc-value) across the motor terminals. What is the firing angle if the motor speed is 1000 rpm and takes 10 A ripple-free current. The armature resistance is 1 ohm. The field circuit with 198 ohms is fed from a fully controlled single-phase...
A separately excited dc motor is fed by a 3-phase, 6-pulse converter shown in figure Q5. The 3-phase line is a 500 V, 60 Hz supply. At rated condition, the dc motor armature current is 15 A. The dc motor armature resistance is 0.15 Ω and the rated speed is 1700 rpm. If the delay angle of the converter is 36 °, calculate the following: 3-phase (2 0 line Figure Q5. (2 marks) Rated voltage of the motor a. b....
3. A controlled single-phase fiull-wave controlled rectifier is connected in a de motor drive in Figure 4. The de motor armature inductance can be assumed large enough such that any motor curent ripple is negligible. (a) Assuming negligible supply reactance, show that the average rectifier output voltage V, in tems of the supply ms voltage E and the firing angle a, is given by 2/2E (6 marks) cos a _ (b) Given that the supply voltage is 230V, 50HZ and...
DC-DC Converter Machine Drives D QUE D EA TI C+ ata at I A separately excited DC motor is powered by a full bridge power converter using MOSFET power transistors and freewheeling diodes as shown above, Converter: Vs - 250 V Switching frequency - 5 kHz. Two-quadrant mode: Q3 always open and Q4 always closed. Assume ideal switches and diodes. DC machine: R-50 m2 LA = 300 H Ex -0.2 V/(r/min) Ignore rotational losses and brush voltage drop Answer the...
The simplified diagram of a DC motor is shown in Fig. 4. Assume that the rotor has inertia m J and viscous friction coefficient Bm. The torque developed by the motor is assumed to be related linearly to the field current by , m m f T K i where the motor torque constant m f a K K K I 1 when the armature current a i is assumed constant (i.e. ) a a i I...