The correct term for the instrument pulling out current from the source is: load compensation maximum power transfer loading effect harmonic distortion
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- d- The ripple frequency in the output voltage of single-phase half-controlled bridge AC/DC converter is ................ when a > 60°. 1- 3f, 2- 6f, 3- 2f, 4- f, 5- None of previous. e- The integrator in the firing circuit of 1-phase bridge AC/DC converter is necessary to have firing angle range. 1-0-90°, 2-0-120°, 3-0-180°, 4-0-360°, 5- None of previous. f The harmonic contents in an inverter can be reduced through the use of modified............ PWM. 1- Voltage, 2- Full, 3- Reduced, 4- Commutation, 5- None of previous. g- Continuous current operation in step-down chopper is gained when.............. 1- txT, 1-√ √LC, 2-2√ √LC, 3-0.5√ √LmC, j- The time available to turn-off thyristor in load-commutated chopper is 3- 2E²cf, 4-E²Cf, 5- None of previous. lo 1-2EC lo' 2-50 ECPart 1) Consider a step down converter with a resistive load. It is supplied by a DC power source of magnitude Vs = 160 V. The switching period is 0.25 ms and the duty cycle k is first set to 0.5. The load is resistive with R=10 Ohms. The critical value of L and the critical value of C are equal to: a. 0.625mH and 0.392uF b. 0.625mH and 0.196uF c. 0.312mH and 0.196uF d. None of these Part2) Now consider the same given but the load is an inductive load with R=10 Ohms and L=10 mH. The switch is ideal. Calculate The RMS load current Io and the RMS converter current Ir are equal to: Select one: a. 5A and 3.54A b. None of these c. 8A and 5.66A d. 12.5A and 8.84AA load consists of XL=70 and XC=150 are connected in parallel across 120 Volt supply.The reactive power of the circuit is.......
- A single-phase full-wave converter in the figure below is supplied with a 120-V, 60-Hz source. The load is highly inductive and the load current is continuous and free of ripples. The electromotive force is neglected (E = 0) and the resistance has a value of R = 10 2. The average output voltage is 85% of the maximum possible average output voltage. The delay angle would be equal to: Select one: 81.8° O b. 31.8° O c 67.8° O d. 51.8° AT₁ AT, R L +7=4₂ WA single phase full converter feeds power to RLE load with R=10 ohm, L=10 mH and E=50 V, the ac source voltage is 230 V, 50 Hz. For continuous conduction, what is the average value of load current for firing angle delay of 600 ?Three Phase Semi Converter When Highly Inductive Load Connected: Please derive the following equations, Thank You :-)
- An ideal boost converter is required to have a constant output voltage of 12 V at 24 W load.The input voltage varies from 2.7 to 4.5 V (as in a battery cell). Select a switching frequency of100 kHz. The value of the inductance in the boost converter is 2.2 uH. Determine:(a) The range of duty cycle that the converter will operate with (hint: mode?), and(b) The minimum value of the output capacitance such that the pk-to-pk load voltage rippleis less than 2%.What is: Nyquist criterion marginsIn an RC coupled clamping circuit, the relationship of the circuit discharge time constant and the input waveform period a. should be long b. should be short c. does not matter d. is ignored if the RC value is less than one
- A single-phase full-wave converter in the figure below is supplied with a 120-V, 60-Hz source. The load is highly inductive and the load current is continuous and free of ripples. The electromotive force is neglected (E 0) and the resistance has a value of R = 10 Q. The delay angle is equal to 31.8°. The average output current is 9.18A and the nth harmonic component is expressed as below. The harmonic factor (known as THD) would be equal to: R 2. vZ.1. Ir = Vo n. T +Yi, = I, E Select one: O a. 58.3% Ob. 48.3% O C. 78.3% Od. 68.3%1. Single phase half-wave converter has a purely resistive load of R and delay angle is a= n/2 determine: (a) Rectification efficiency (b) Form factor (c) Ripple factor.4: Design a buck converter to produce an output voltage of 18 V across a 10-_ load resistor. The output voltage ripple must not exceed 0.5 percent. The dc supply is 48 V. Design for continuous inductor current. Specify the duty ratio, the switching frequency, the values of the inductor and capacitor, the peak voltage rating of each device, and the rms current in the inductor and capacitor. Assume ideal components.