Q.2 The speed of a 220V,3.73 kW, 1000 rpm d.c. motor is controlled by a single phase full converter. The ac supply is 240V, 50Hz. A very large inductance is in series with the armature. Assume the motor & converter to be lossless. The emf constant is 1.9 V sec/rad. For a speed of 1000 rpm & rated motor current, determine[CO3] i) The firing angle of the converter ii) The rms value of the supply of the supply current & thyristor current. iii) The supply power factor.

What is reactive power, and how does it affect the efficiency and stability of an electrical grid?

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1. Impedance is the total opposition to an AC circuit caused by electric penalty tions, the tra capa multiple pacitive systema 62 Fundamentals of AC Electricity Questions for This C a. 1. Draw a diagram of an AC sine wave and identify its peak voltage and peak-to-peak voltage levels. b. 2. Explain the term frequency as it refers to AC electricity. c. 3. Discuss the difference between a load center and a fused disconnect. 2. WE wa 4. Explain how you would test for voltage in a fusible dis- connect on the line-side and load-side terminals. vi ci 5. Trace the path of a generated AC voltage from the generat- ing station where it is produced to the point where you would connect it to a machine in a factory. Be sure to iden- tify all the important parts of the system between the gen- eration station and the disconnect on the machine. a. be 3. True or False inductive reactance, capacitive reactance, and resistan 2. The units of impedance are