Homework Answers
Answer c is correct because A is total core current andB is magnetising current and c is current which is responsible for core loss
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3. What kinds of the curents at A, B, C in the transformer model as indicated...
2.120 pts] A schematic diagram of transformer is shown below. The closed path, l in the magnetic circuit in the Figure is traced by magnetic flux Ф. N,, N2, and 11, 12 are the numbers of turns and th...
2.120 pts] A schematic diagram of transformer is shown below. The closed path, l in the magnetic circuit in the Figure is traced by magnetic flux Ф. N,, N2, and 11, 12 are the numbers of turns and the currents in the primary and secondary circuits, respectively. The permeability, and cross-section of ferromagnetic core is, u and A İl(r) (a) [6 pts] Draw an equivalent magnetic circuit with two magnetomotive force, Vmmfi, and Vmmf2, magnetic closed flux, 4, and magnetic...
PLEASE SO PART C, THANK YOU WILL RATE. A single-phase transformer with a 5:1 turns ratio...
PLEASE SO PART C, THANK YOU WILL RATE.
A single-phase transformer with a 5:1 turns ratio is connected to a 600 V voltage source on the primary side, and a 5 Ω resistor on the secondary. A current of 22 amps of current is measured to flow through the 5 Ω resistor on the secondary side. The real power flowing into the transformer primary is measured at 2500 W. You can neglect Lm and Rc (the magnetizing inductance and core...
JUST PART E VOLTAGE REGULATION PLEASE!! 2) The series impedance referred to the HV side of...
JUST PART E VOLTAGE REGULATION PLEASE!!
2) The series impedance referred to the HV side of a 30 kVA, 8800/220 V distribution transformer is Zeq = 20 + j80 N. The components of the excitation branch referred to the HV side are Rc = 200 kN and XM = 20 kN. Suppose the transformer is supplying the load connected to the LV winding with the rated apparent power and the rated voltage (220 V) at a 0.8 lagging P.F. Use...
RT +jX2 N1:N2 +X Is Vjoad +jX V 8000 V (rms) 60HZ When the transformer is open circuited, it produces a secondary volta...
RT +jX2 N1:N2 +X Is Vjoad +jX V 8000 V (rms) 60HZ When the transformer is open circuited, it produces a secondary voltage of 240 V(rms) and source current Is=0.315<81.8° A (rms) a) Find the turms ratio N2/N1 b) Find real and reactive power absorbed by transformer c) Using values obtained in (b) estimate the values of Rc and Xm
RT +jX2 N1:N2 +X Is Vjoad +jX V 8000 V (rms) 60HZ
When the transformer is open circuited, it produces...
Problem 1: The secondary winding of a transformer has a terminal voltage of v, (t) 282.8...
Problem 1: The secondary winding of a transformer has a terminal voltage of v, (t) 282.8 sin 377t V. The turns ratio of the transformer is 100:200 (a0.50) The impedances of this transformer referred to the primary side are The equivalent circuit is shown below lf (a) If the secondary current of the transformer is i,()-7.07sin(3771-36.87) A, what is the primary current of this transformer? (20 points) HINTS: I. Peak values of the secondary voltage and current are specified in...
Problem 3 A 50-Hz transformer is operated from a 60 Hz supply. Assume that the load...
Problem 3 A 50-Hz transformer is operated from a 60 Hz supply. Assume that the load does not change. Discuss the corresponding effects on its flux, reactive power requirements, losses, and efficiency. а- [5 Points] A 50-kVA, 2400/240 V, 60-Hz, single-phase distribution transformer has the following equivalent circuit parameters referred to the high-voltage side Xea 3.0 Req= 0.5 Xm 4,500 S2 Use the equivalent Cantilever model circuit shown in Figure (1). Assume that the load on the secondary of the...
A 1.2 KVA, 480/120 V, 60Hz real step-down transformer has the following parameters that are all...
A 1.2 KVA, 480/120 V, 60Hz real step-down transformer has the following parameters that are all referred to the primary-side: the total copper loss R = 2.4 N, the core loss Rc = 2.4 K2, the magnetization reactance Xm = 2 K2, and all the leakages are negligible. Suppose that the output port in the secondary-side is operated at full-load and rated voltage with the unity power factor, i.e., p. f. = 1. (a) Draw its equivalent circuit; (b) Find...
Problem 4 (20pts). A transformer with N1, N3 turns at the input and N2, N4 turns...
Problem 4 (20pts). A transformer with N1, N3 turns at the input and N2, N4 turns at the output is wrapped as drawn. The magnetic flux in the core is given as Q = -20sin(wt) (Wb), and R, = 1k.. Find: a) V2 V3 and 12, 13. b) Direction of 12, 13. c) What is Rin? N=600 N2=300 Nz=100 N=300 12 13 Rin RL V V2 V3 R -100082
An ideal transformer is connected as shown below. If Vs = 83 V, N1 = 7,...
An ideal transformer is connected as shown below. If Vs = 83 V, N1 = 7, N2 = 2, and R = 294 , what is the magnitude of the resistor voltage drop VR (in V)? Vs N:N Points possible: 1 Allowed attempts: 3 Retry penalty: 33.333% Submit How much current does the source supply (IA, in A)? Points possible: 1 Allowed attempts: 3 Retry penalty: 33.333% Submit An ideal transformer is connected as shown below. The circuit parameters are...
Q-1 A 60Hz, 480V/240V,960V A transformer is supplying a 960W passive load at 240V. The resistances...
Q-1 A 60Hz, 480V/240V,960V A transformer is supplying a 960W passive load at 240V. The resistances of the primary side and secondary side of the transformer are 1.092 and 0.252 respectively. If the no load losses of the transfomer is given by P-Vã 4800 W where Vn is the input voltage of the transformer in Volt. Answer the following: a) Calculate transformer efficiency b) Do you allow this transformer to be connected to 240V 50Hz distribution system? Explain. c What...
2.120 pts] A schematic diagram of transformer is shown below. The closed path, l in the magnetic circuit in the Figure is traced by magnetic flux Ф. N,, N2, and 11, 12 are the numbers of turns and the currents in the primary and secondary circuits, respectively. The permeability, and cross-section of ferromagnetic core is, u and A İl(r) (a) [6 pts] Draw an equivalent magnetic circuit with two magnetomotive force, Vmmfi, and Vmmf2, magnetic closed flux, 4, and magnetic...
PLEASE SO PART C, THANK YOU WILL RATE.
A single-phase transformer with a 5:1 turns ratio is connected to a 600 V voltage source on the primary side, and a 5 Ω resistor on the secondary. A current of 22 amps of current is measured to flow through the 5 Ω resistor on the secondary side. The real power flowing into the transformer primary is measured at 2500 W. You can neglect Lm and Rc (the magnetizing inductance and core...
JUST PART E VOLTAGE REGULATION PLEASE!!
2) The series impedance referred to the HV side of a 30 kVA, 8800/220 V distribution transformer is Zeq = 20 + j80 N. The components of the excitation branch referred to the HV side are Rc = 200 kN and XM = 20 kN. Suppose the transformer is supplying the load connected to the LV winding with the rated apparent power and the rated voltage (220 V) at a 0.8 lagging P.F. Use...
RT +jX2 N1:N2 +X Is Vjoad +jX V 8000 V (rms) 60HZ When the transformer is open circuited, it produces a secondary voltage of 240 V(rms) and source current Is=0.315<81.8° A (rms) a) Find the turms ratio N2/N1 b) Find real and reactive power absorbed by transformer c) Using values obtained in (b) estimate the values of Rc and Xm
RT +jX2 N1:N2 +X Is Vjoad +jX V 8000 V (rms) 60HZ
When the transformer is open circuited, it produces...
Problem 1: The secondary winding of a transformer has a terminal voltage of v, (t) 282.8 sin 377t V. The turns ratio of the transformer is 100:200 (a0.50) The impedances of this transformer referred to the primary side are The equivalent circuit is shown below lf (a) If the secondary current of the transformer is i,()-7.07sin(3771-36.87) A, what is the primary current of this transformer? (20 points) HINTS: I. Peak values of the secondary voltage and current are specified in...
Problem 3 A 50-Hz transformer is operated from a 60 Hz supply. Assume that the load does not change. Discuss the corresponding effects on its flux, reactive power requirements, losses, and efficiency. а- [5 Points] A 50-kVA, 2400/240 V, 60-Hz, single-phase distribution transformer has the following equivalent circuit parameters referred to the high-voltage side Xea 3.0 Req= 0.5 Xm 4,500 S2 Use the equivalent Cantilever model circuit shown in Figure (1). Assume that the load on the secondary of the...
A 1.2 KVA, 480/120 V, 60Hz real step-down transformer has the following parameters that are all referred to the primary-side: the total copper loss R = 2.4 N, the core loss Rc = 2.4 K2, the magnetization reactance Xm = 2 K2, and all the leakages are negligible. Suppose that the output port in the secondary-side is operated at full-load and rated voltage with the unity power factor, i.e., p. f. = 1. (a) Draw its equivalent circuit; (b) Find...
Problem 4 (20pts). A transformer with N1, N3 turns at the input and N2, N4 turns at the output is wrapped as drawn. The magnetic flux in the core is given as Q = -20sin(wt) (Wb), and R, = 1k.. Find: a) V2 V3 and 12, 13. b) Direction of 12, 13. c) What is Rin? N=600 N2=300 Nz=100 N=300 12 13 Rin RL V V2 V3 R -100082
An ideal transformer is connected as shown below. If Vs = 83 V, N1 = 7, N2 = 2, and R = 294 , what is the magnitude of the resistor voltage drop VR (in V)? Vs N:N Points possible: 1 Allowed attempts: 3 Retry penalty: 33.333% Submit How much current does the source supply (IA, in A)? Points possible: 1 Allowed attempts: 3 Retry penalty: 33.333% Submit An ideal transformer is connected as shown below. The circuit parameters are...
Q-1 A 60Hz, 480V/240V,960V A transformer is supplying a 960W passive load at 240V. The resistances of the primary side and secondary side of the transformer are 1.092 and 0.252 respectively. If the no load losses of the transfomer is given by P-Vã 4800 W where Vn is the input voltage of the transformer in Volt. Answer the following: a) Calculate transformer efficiency b) Do you allow this transformer to be connected to 240V 50Hz distribution system? Explain. c What...
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