Electrical plants Draw the connection diagram of the Impulse relay and write the working principle and usage areas.
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- What are the advantages and disadvantages of using Flyback and Push-Pull Converters in electrical power applications?The preferred method for applying the field excitation voltage uses a field relay which operates on the principle of A. speed application. B. time application.C. angle application. D. thermal application.A 48kW, 600V, 1500 rpm separately excited dc motor is controlled by single phase semi-controlled converter. The resistance of the armature is 192 and of the field is 1450. The field circuit is controlled by a single phase fully controlled converter and its firing angle is set to 20. The AC supply voltage to the armature and field converters is a single phase 220V, 60 Hz. The voltage constant is 0.946 V/A rad/s. If the armature converter firing angle is 45 and the speed is 1200 rpm; calculate the armature current and the developed torque.
- The voltage drop at brush- commutator contact is variable (1-2V) .and dependent of armature current True O False O5. A single phase full wave ac voltage controller working on ON-OFF control technique has supply voltage of 230V r.m.s, at 50Hz, and a load R = 5002. The controller is ON for 30 cycles and off for 40 cycles. Calculate (a) ON & OFF time intervals. (b) the output R.M.S. voltage. (c) the power factor of the controller.Problem 2: Consider controlling the Omron G5LE-1 5VDC power relay, shown below, using an Arduino in the following circuit. A relay has windings that when energized cause a magnetic field, which mechanically closes the contact side of the relay, so it acts as an electronically controlled switch. One benefit of a relay is that the switch on the contact side is electrically isolated from the coil on the control side of the relay. This advantage of electrical isolation comes at a cost. Relays do not switch states quickly like transistors. Based on its data sheet, the Omron G5LE-1 5VDC has a coil resistance of 63N (at DC, consider the coil side of the relay as a resistor). Select the base resistance to ensure the P2N222A BJT is deep into saturation when the relay is energized (meaning current is flowing through its windings). o Note: It is safe to operate the Omron G5LE-1 at up to 130% of its rated voltage of 5VDC in its entire operating temperature range. Assume VcE sat = 0.2V for the BJT.…
- Can you explain the operation of AC input and output conditioning circuits?DA de machine is controlled by the step-down de-de converter shown below. The armature inductance La =0.2 mH and the armature resistance can be neglected. The armature current is 5A. The Buck converter is operating at the switching frequency is 30 kHz and the duty ratio is 0.8. + > ~ Answer the following questions: 1) Calculate the input voltage (Va) if the output voltage (ea = 200 V). 2) Find the ripple in the armature current (la). 3) Calculate the maximum and minimum values of the armature current (la). 4) Sketch the armature current (ia (t)) and the supply current (ig(t)).What are buck and boost converters and how are they used in power electronics?
- How does the AC coil of the PFR receive the induced field current without receiving the full field current strength?13.a. A bridge circuit is used to measure the loss of larger transformers because the circuitA. promotes safety.B. eliminates calculations.C. increases measuring convenience.D. improves measurement accuracy.13.b. A synchronous machine is run as an unloaded motor. If a low voltage is supplied at the ratedfrequency, and if the full-load armature current flows, a test is being run to determine theA. windage loss.B. I²R loss.C. stray-load loss.D. core loss.14. If a rotating standard with a basic K, of +% whr per revolution is used on 120-volt and 15-amp ranges, its effective K is A. % whr per revolution. B. 2 whr per revolution. C. 1 whr per revolution. D. whr per revolution.
