EBK PRINCIPLES OF ELECTRIC CIRCUITS
10th Edition
ISBN: 9780134879499
Author: Buchla
Publisher: YUZU
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A factory operates at 0.80 p. f. lagging and has a monthly demand of 750 Kva. The monthly power rate is Pesos 8.50 per Kva. To improve the power factor 250 Kva capacitors are installed in which there is negligible power loss. The installed cost of equipment is Pesos 20,000 and fixed charges are estimated at 10% per year. Calculate the annual savings effected by the use of capacitors.
An RLE load is operating in chopper circuit from a 500 V de source as shown in Fig. (I) For
R = 0, L = 0.064 and constant E, the duty cycle is 0.2
(a) Derive the expression for the lo(max) and lo(min) for type A chopper, supplying RLE load.
Also, derive the expression for The maximum peak to peak ripple current.
(b) Find the chopping frequency to limit the amplitude of load current excursion to 10 A.
Fig.(1)
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Q1) An RLE load is operating in chopper circuit from a 500 V dc source as shown in Fig.(1) For
R=0, L= 0.064 and constant E, the duty cycle is 0.2
(a) Derive the expression for the lo(max) and lo(min) for type A chopper, supplying RLE load.
Also, derive the expression for The maximum peak to peak ripple current.
(b) Find the chopping frequency to limit the amplitude of load current excursion to 10 A.
Vs
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R
Fig.(1)
E
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- 04) A converter is feeding an RL load as shown in Fig. 2 with Vs = 220 V, R = 52, L = 7.5 mH, f=1 kHz, d=0.5, and E=0 V. Calculate (a) the minimum instantaneous load current (b) the peak instantaneous load current, (c) the maximum peak-to-peak load ripple current, (d) the average value of load current la, (e) the rms load current lo, (f) the effective input resistance Ri seen by the source, (g) the rms chopper current, and (h) the critical value of the load inductance for continuous load current. Chopper FWD 500000 R Fig.2 LLarrow_forwardcontrol systemsarrow_forwardPLEASE SOLVE STEP BY STEP WITHOUT ARTIFICIAL INTELLIGENCE OR CHATGPT SOLVE BY HAND STEP BY STEParrow_forward
- Please help me in optimization homework please use FORMATION OF LiNEAR PROGRAMMING.arrow_forward- From these 2 truth tables (A and B), develop- The unsimplified function- Karnaugh's map- Simplified function- The schematic design of the circuit from the simplified function- The Circuit in Tinkercad from the simplified function (include Screenshots and Link circuits in Tinkercad)arrow_forwardBuild the respective truth tables, the Schematic Design of the unsimplified circuit, only with NAND logic gates, based on the following boolean functions: a) (X * Y)’ + Zb) ((A + B) * Z)’arrow_forward
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- - What function do Demultiplexers or DEMUX perform?- According to the implementation of automation circuits with ARDUINO boards, what would they be, Conceptually, the main components of any system of automation? Draw a representative schematic or block diagram.arrow_forwardSolve problems 5.2 in detail and thank youarrow_forward5.1 Determine the three zone settings for the relay Rab in the system shown in Figure 5.26. The system nominal voltage is 138 kV, and the positive sequence impedances for the various elements are given in the figure. The transformer impedance is given in ohms as viewed from the 138 kV side. Assume that the maximum load at the relay site is 120 MVA, and select a CT ratio accordingly. The available distance relay has zone 1 and zone 2 settings from 0.2 to 10 2, and zone 3 settings from 0.5 to 40 2, in increments of 0.1 2. The angle of maximum torque can be adjusted to 75° or 80°. Remember that the zone 3 of the relay must back up the line BC, as well as the transformer. A Rab (3+j40) B (2+ j50) (0+j9) с Fu D Figure 5.26 System for problem 5.1arrow_forward
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