题目
题目

Centre for Engineering and Industrial Design MG7011- Electrical Machine Dynamics - Test 4

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Question textA coil having 90 turns is connected to a 120V. 60Hz source. If the effective value of magnetising current is 4A. [Do not put the units in the box and make sure you follow the correct decimal places] Calculate: The peak value of flux: Answer 1 Question 3[input] The peak value of mmf: Answer 2 Question 3[input] The inductive reactance of coil:Answer 3 Question 3[input] The inductance of coil:Answer 4 Question 3[input]

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思路分析
We start by noting the given data: N = 90 turns, V = 120 V rms, f = 60 Hz, magnetising current rms I_m = 4 A. The task asks for four quantities: peak flux, peak MMF, inductive reactance, and inductance. Option set for calculation review (based on the provided numeric values): - Answer 1 (0.005) for the peak value of flux - Answer 2 (509.1) for the peak value of MMF - Answer 3 (21.21) for the inductive reactance - Answer 4 (0.056) for the inductance Now, step-by-step evaluation of each quantity and how the numbers are obtained: 1) Peak value of flux - The flux peak Φ_max in an inductor fed from a sinusoidal voltage is given by Φ_max = V_peak / (N ω), where V_peak is the peak source voltage and ω = 2πf. With V_rms = 120 V, V_peak = 120√2 ≈ 169.7 V, ω = 2π(60) ≈ 376.99 rad/s, and N = 90, we get Φ_max ≈ 169.7 / (90 ×......Login to view full explanation

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Question textA coil having 90 turns is connected to a 120V. 60Hz source. If the effective value of magnetising current is 4A. [Do not put the units in the box and make sure you follow the correct decimal places] Calculate: The peak value of flux: Answer 1 Question 2[input] The peak value of mmf: Answer 2 Question 2[input] The inductive reactance of coil:Answer 3 Question 2[input] The inductance of coil:Answer 4 Question 2[input]

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