Full bridge dc-dc converter
In the full-bridge DC-DC converter circuit, Vd = 250 V. The bridge is controlled using bipolar
PWM with a switching frequency fsw=50 kHz. The bridge is connected to a speed controlled DC
machine. The machine armature inductance La = 0.2 mH and the resistance Ra is negligible
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DC-DC Converter Machine Drives D QUE D EA TI C+ ata at I A separately excited...
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...
A PV array with terminal voltage around 48 V under standard conditions is connected to a step-up dc-dc converter to supply a load at 120 V, 5 A. The input inductance is 8 mH with an internal resistanc...
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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...
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Electric Drives
A separately excited dc motor controlled by a 3 phase full wave fullcontrolled converter connected to the armature and field circuits. the acsupply voltage is 208v and the frequency is 60 Hz. If the field currentadjusted to If =1 A and the armature resistance Ra = 0.2 Ω ,the fieldresistance Rf = 250 Ω and the voltage constant K = 1.2V/A-rad/sec. The loadtorque TL=120 Nm and The firing angle of the armeture circuit adjusted tobe αa=30. Consider armature inductance La...
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 1...
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A switch-mode dc-dc converter is operating at a switching frequency of 20kHz, and Vd=150V. The average...
A switch-mode dc-dc converter is operating at a switching frequency of 20kHz, and Vd=150V. The average current being drawn is 8A. In the equivalent circuit od dc motor, Ea=100 V, Ra=0.25, La=4mH, all in series. Calculate ida, idb, and id(=Id)
4. A 3-phase full-wave converter drive is feeding power to a 220 V, 20 A, 1000...
4. A 3-phase full-wave converter drive is feeding power to a 220 V, 20 A, 1000 rpm separately excited dc motor. The ac input to the converters are 415 V, 3-phase, 50 Hz, Y-connected supply system. The field is also controlled by a 3-phase full converter and is set to the maximum possible value. The armature resistance is 0.5 Q and the field resistance is 250 12. The motor voltage constant is 1.2 V/A rad/s. Assume continuous conduction and ripple...
of CM with Consider the flyback converter with DC input voltage Vd of 48v. The output...
of CM with Consider the flyback converter with DC input voltage Vd of 48v. The output voltage is regulated to 5V and the turn's ratio transformer is considered as 6:1. The magnetizing inductance of the transformer is 150?H The converter is operated in C a switching frequency of 200 kHz with the load power of 30W. Assuming the converter to be lossless, calculate b. switch voltage stress neglecting the leakage inductance of the transformer
bridge oad DC DC Vload DC For a single-phase DC-AC inverter with an RL load at the output. It is switching using the bi...
bridge oad DC DC Vload DC For a single-phase DC-AC inverter with an RL load at the output. It is switching using the bipolar SPWM method with the desired fundamental frequency of 400 Hz and the switching frequency of 20.4 kHz. Here the modulation index is 0.6, input DC is 200 V, load R-5 Ω and L 2 mH a. What's the RMS value of the fundamental component of the output voltage across RL? b. What's the RMS value of...
Design a DC-DC boost converter, shown below, that converts an unregulated supply of 12.0 Vak into a load voltage of...
Design a DC-DC boost converter, shown below, that converts an unregulated supply of 12.0 Vak into a load voltage of 30.0 Ve and load current of 0.25 A. The switching frequency of the transistor is 100 kHz. The transistor has an on-resistance of 0.15 Ω and the diode drops 0.7 V when it is conducting. The voltage ripple (Av) is taken as 20 mVpp The circuit has 80% conversion efficiency. Find the DC input-current (Iden), duty-cycle (D), inductance (L), power-dissipation...
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 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. 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...
4. A 3-phase full-wave converter drive is feeding power to a 220 V, 20 A, 1000 rpm separately excited dc motor. The ac input to the converters are 415 V, 3-phase, 50 Hz, Y-connected supply system. The field is also controlled by a 3-phase full converter and is set to the maximum possible value. The armature resistance is 0.5 Q and the field resistance is 250 12. The motor voltage constant is 1.2 V/A rad/s. Assume continuous conduction and ripple...
of CM with Consider the flyback converter with DC input voltage Vd of 48v. The output voltage is regulated to 5V and the turn's ratio transformer is considered as 6:1. The magnetizing inductance of the transformer is 150?H The converter is operated in C a switching frequency of 200 kHz with the load power of 30W. Assuming the converter to be lossless, calculate b. switch voltage stress neglecting the leakage inductance of the transformer
bridge oad DC DC Vload DC For a single-phase DC-AC inverter with an RL load at the output. It is switching using the bipolar SPWM method with the desired fundamental frequency of 400 Hz and the switching frequency of 20.4 kHz. Here the modulation index is 0.6, input DC is 200 V, load R-5 Ω and L 2 mH a. What's the RMS value of the fundamental component of the output voltage across RL? b. What's the RMS value of...
Design a DC-DC boost converter, shown below, that converts an unregulated supply of 12.0 Vak into a load voltage of 30.0 Ve and load current of 0.25 A. The switching frequency of the transistor is 100 kHz. The transistor has an on-resistance of 0.15 Ω and the diode drops 0.7 V when it is conducting. The voltage ripple (Av) is taken as 20 mVpp The circuit has 80% conversion efficiency. Find the DC input-current (Iden), duty-cycle (D), inductance (L), power-dissipation...
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