s3 + 5s2 + 12s +K = 0. Find the range of K for all the roots to lie to the The characteristics equation for feedback control, left of s = 1.
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- A hybrid stepper motor is shown in Figure Q2(b). Demonstrate how the windings of the stepper motor are excited in wave drive mode to rotate the rotor 4 steps in the counterclockwise direction. Assume that Figure Q2(b) shows the starting position (to) of the stepper motor before the windings are excited. The first step (41) is given in Table Q2(b). (Note: Transfer Table Q2(b) to the answer script; tick the correct cells in the table to show the winding excitation sequence.) (b) Table Q2(b) Clock cycle Stator pole North pole South pole i (s) t2 (s) Al A2 B1 B2 Al A2 B1 B2 Clock eyele в (s) A2 14 (s) Stator pole North pole South pole AI B1 B2 Al A2 B1 B2 stator A1 AL armature N shaft PM armature 1- amature 2 armature 2 A A2 Figure Q2(b)From the phasor diagram in the figure, deduce a expression for the output power, as a function of the armature current, Ia, and angle γ . Draw the curve Power (P) versus current angle (γ), for different levels of excitement Ef. For this consider negligible mechanical losses.Hi .. This is simulation starting synchronous motor in matlab 2012 who can I find the power factor by use this simulation and what is the elemen add to find the power factor
- The machine in Q4a has what kind of compounding characteristic? O Differential Shunt Under Over FlatA DC chopper is used in regenerative braking mode of a dc series motor. The dc supply is 600 V, the duty cycle is 70%. The average value of armature current is 100 A. It is continuous and ripple free. What is the value of power feedback to the supply ?design a feedback control system which results in a closed system for the given DC motor that will be given below Damping ratio is 0.6 natural frequency is 10 rad/sec
- A DC, separately excited motor is used to drive a constant-torque load. The field circuit is excited by a full-wave, AC/DC SCR converter. The armature circuit of the motor is connected to a constant dc voltage source of 160 V. The inductance of the field circuit is large, and the field current is continuous. The field AC voltage (input to the converter) is 147 V (rms), and the field resistance is 100 N. The armature resistance is 1.2 N. When the triggering angle of the SCRS is adjusted to zero, the motor speed is 1000 rpm, and the armature current is 10 A. Calculate the average current and dc power of the field i. A1 F1 circuit when the triggering angle is equal to 15°. La Ra If A a P; W M • If the motor speed is to be increased to 1400 rpm, what is the F2 A2 triggering angle? (a) Circuit a =A shunt motor running on no-load takes 5 A at 200 V. The resistance of the fieldcircuit is 150 ohms and of the armature 0.1 ohm. Determine the output andefficiency of motor when the input current is 120 A at 200 V.A DC, separately excited motor is used to drive a constant-torque load. The field circuit is excited by a full-wave, AC/DC SCR converter. The armature circuit of the motor is connected to a constant dc voltage source of 160 V. The inductance of the field circuit is large, and the field current is continuous. The field AC voltage (input to the converter) is 127 V (rms), and the field resistance is 110 N. The armature resistance is 2.2 N. When the triggering angle of the SCRS is adjusted to zero, the motor speed is 1300 rpm, and the armature current is 13 A. A1 • Calculate the average current and dc power of the field circuit when the triggering angle is equal to 15°. La Ra If 1.04 A Va M P¡ = 110.89 W A2 If the motor speed is to be increased to 1700 rpm, what is the triggering angle? (a) Circuit a =
- 1. Single phase full converter is used to control the speed of separately excited DC motors. AC supply voltage is 208 V. Motor armature and field resistance are 0.5 2 and 345 2 respectively. The field current is also controlled by a full converter and the field current is set as the maximum possible value. Motor voltage constant is 0.7 V/A-rad/sec. If firing angle is 45° and armature current is 55 A, determine the angular speed of the motor. Assume armature and field current are ripple free.DISCUSSION: 1. What do you mean by rise time? Derive its expression for a unity feedback 2nd order control system. 2. Why is less overshoot desired for practical systems?A single phase Half wave AC voltage controller has a resistive load of 16 ohms with input supply voltage of 240 V, 50 Hz. The delay angle of the thyristors is, a = 2T/5. Determine a) The rms output voltage and current. b) Input power factor and Input curren c) Average output voltage and current.