Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 30, Problem 2SQ
What element is the heart of the solid-state starter?
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4. Discussion: Compare between theoretical effect of KD at first order and second order systems
regarding steady-state errors and transient responses with the practical obtained results whenever applying
step input signal. In Experiment Derivative Controller
55-82
For the state space model, find the following:
1. Identify the state-space matrices A,B,C, and D.
2. Compute the transfer function G(s) analytically (by hand).
3. Solve for x(t) given a step input u(t) =1 and zero initial conditions (use transition matrix).
4. Use MATLAB to compute the transfer function.
5. Plot the step response using MATLAB.
[X] = 71+0u
y = x1 + x2
-2
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Electric Motor Control
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- A DPSK has the following data input: d(n) =101011010001 1. Find the output coded sequence and the carrier phase. 2. Recover the input data from the output coded sequence.arrow_forwardQ9 A single-phase transformer, 2500 / 250 V, 50 kVA, 50 Hz has the following parameters, the Primary and secondary resistances are 0.8 ohm and 0.012 ohm respectively, the primary and secondary reactance are 4 ohm and 0.04 ohm respectively and the transformer gives 96% maximum efficiency at 75% full-load. The magnetizing component of-load current is 1.2 A on 2500 V side. 1- Draw the equivalent circuit referred to primary (H.V side) and inserts all the values in it 2- Find out Ammeter, voltmeter and wattmeter readings on open-circuit and short-circuit test. If supply is given to 2500 V side in both cases. Ans. O.C. Test (Vo= 2500 V, lo=1.24 A, Wo=781.25 w) S.C. Test (Vsc =164.924 V, Isc =20 A, Wsc =800 w )arrow_forwardA modulating signal f(t) is bandlimited to 5.5 kHz is sampled at a rate of 15000 samples/sec. The samples are quantized into 1024 levels. Calculate transmission bandwidth if the following modulation types are used for signal transmission: 1-ASK, QAM 2-QPSK, 8-PSK 3-FSK, 8-FSK with Af = 20 kHzarrow_forward
- Q10 The full-load copper loss on the H.V. side of 100KVA, 11000/317 V, single-phase transformer is 0.62 kw and on the L.V. side is 0.48 kW. i) Calculate R1, R2 in ohms ii) Find X1,X2,if the percentage equivalent reactance is 4%, and reactance is divided in same proportion as resistance. Ans, 27.30, 0.175), 0.00482 . (7.5)arrow_forwardFind the binary sequence, for the following Differential Manchester code.arrow_forwardQ2- What are the parameters and loss that can be determined during open-circuit test of singlephase transformer. Draw the circuit diagram of open-circuit test and explain how can you calculate the Parameters and loss.arrow_forward
- Q6- the open circuit and short circuit tests on a 10 KVA, 125/250 v, 50 Hz single phase transformer gave the following results: O.C. Test: 125 V,0.6 A, 50 W ( on L.V.) S.C. Test: 20 V, 40 A, 177.78 W (on H.V. side) Calculate: i) Copper losses on half load ii) Full load efficiency at 0.8 leading p.f. iii) Half load efficiency at 0.8 leading p.f. iv) Regulation at full load at 0.9 leading p.f. Ans: 44.445 W, 97.23%, 97.69%, -1.8015%arrow_forwardQ3-A two-winding transformer has a primary winding with 208 turns and a secondary winding with 6 turns. The primary winding is connected to a 4160V system. What is the secondary voltage at no load? What is the current in the primary winding with a 50-amp load connected to the secondary winding? What is the apparent power flowing in the primary and secondary circuits? Ans. 120 V, 1.44 A, 6000 VAarrow_forwardQ12- A three phase transformer 3300/400 V,has D/Y connected and working on 50Hz. The line current on the primary side is 12A and secondary has a balanced load at 0.8 lagging p.f. Determine the i) Secondary phase voltage ii) Line current iii) Output power Ans. (230.95 V, 99.11 A, 54.94 kW)arrow_forward
- Q1- A single phase transformer consumes 2 A on no load at p.f. 0.208 lagging. The turns ratio is 2/1 (step down). If the loads on the secondary is 25 A at a p.f. 0.866 lagging. Find the primary current and power factor.arrow_forwardQ7- A 5 KVA, 500/250 V,50 Hz, single phase transformer gave the following reading: O.C. Test: 250 V,2 A, 50 W (H.V. side open) S.C. Test: 25 V10 A, 60 W (L.V. side shorted) Determine: i) The efficiency on full load, 0.8 lagging p.f. ii) The voltage regulation on full load, 0.8 leading p.f. iii) Draw the equivalent circuit referred to primary and insert all the values it.arrow_forwardQ4- A single phase transformer has 350 primary and secondary 1050 turns. The primary is connected to 400 V,50 Hz a.c. supply. If the net cross sectional area of core is 50 cm2, calculate i) The maximum value of the flux density in the core. ii) The induced e.m.f in the secondary winding. Ans: 1.029 T, 1200Varrow_forward
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