Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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A Flyback converter (for questions 1-3) shown below has the following parameters. Vin=100V, Vo=20v,
Po=40W, D=0.25, Fsw=250kHz
iin
i out
in
1. What is the turns ratio N1:N2 between the primary side winding and the secondary side winding?
A. Ν1: N25:3
B. N1: N2 = 3:5
C. N1: N2= 5:2
D. None of the above
%3D
2. What is the maximum voltage on the power switch?
A. 120V
В. 133V
С. 100V
D. None of the above
3. What is the maximum voltage on the diode?
Α. 40V
В. 133V
C. 80V
D. None of the above
4. The magnetizing inductor at the primary side winding is 100uH, what is the peak current in the power
switch?
Α. 1.8Α
В. 1.6A
С. 2.1A
D. None of the above
What is use of solenoid coil in the pressure to converter?
a. To produce magnetic field in the LVDT
b. To change the LVDT output
c. To bring back the pivoted beam normal position
d. To produce linear displacement in bellows
A Flyback converter (for questions 1-3) shown below has the following parameters. Vin-100v, Vo-20V,
Po-ioW, D-025, Fsw-250kHz
4. The magnetizing inductor at the primary side winding is 100uH, what is the peak current in the power
switch?
A. 1.8A
B. 1.6A
C. 2.1A
D. None of the above
Chapter 34 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 34 - Which NEC table is used to determine the full...Ch. 34 - A 5-HP single-phase motor is connected to 208...Ch. 34 - A 10-HP single-phase motor is connected to 240...Ch. 34 - A 75-HP synchronous motor is connected to a...Ch. 34 - A squirrel-cage induction motor has a nameplate...Ch. 34 - A squirrel-cage motor has a nameplate current...Ch. 34 - A 100-HP three-phase squirrel-cage induction motor...Ch. 34 - A 60-HP synchronous motor is connected to 240...Ch. 34 - Prob. 9RQCh. 34 - Both the motors and the feeder in Question 9 are...
Ch. 34 - A 30-HP squirrel-cage induction motor is connected...Ch. 34 - Refer to the preceding Practical Application. When...Ch. 34 - Refer to the first Practical Application in this...Ch. 34 - A 10-HP single-phase motor is connected to 240...Ch. 34 - A 500-HP synchronous motor is connected to 2300...Ch. 34 - A 30-HP three-phase squirrel-cage induction motor...Ch. 34 - A 75-HP synchronous motor is connected to a...Ch. 34 - Prob. 5PPCh. 34 - A 350-HP squirrel-cage induction motor is...Ch. 34 - Three squirrel-cage motors are connected to a...
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- A 110 V, 60 Hz, 6 – pole single phase induction motor 1/3 hp has the following equivalent circuit impedances: RI = 1.52 ohm, R2 = 3.13 ohm and x1 =2.10 ohm, x2 =1.56 ohm. Xm=58.2 ohm, The Friction, windage and stry losses =16W, the core loss = 35 W, For a slip of 0.05, calculation (a) input current, (b) power factor, (c) developed power, (d) output power, (e) speed (f) in put power (g) air gab power (h) T ind (i) T load 6) efficiency.arrow_forward14/ What are the following statements are true for a three-phase induction motor? I. Three-phase induction motor stator winding is fed from a three-phase supply II. Stator carries a three-phase winding III. Rotor carries a short circuited winding a. I and II only b. I,II and III c. II and III d. I onlyarrow_forward7- Iron loss in the rotor of a 3-phase induction motor is negligible due to (a) Very low frequency of emf induced in the rotor (c) Very low flux density in rotor parts 8- The starting current of a 3-phase induction motor is about (a) Half (c) 5 to 7 times (b) Twice (d) 8 to 10 times 9- During plugging of an induction motor (a) Phase sequence is reversed (b) A de source is connected to stator (e) One phase is open circaited (d) Power is ied back to mains 10- Direct online (D.O.L.) starter is used for induction motors (a)Less than 5 h.p. (b) Less than 10 h.p. (c) Greater than 10 h.p. (d) For any capacity (b) Very low emf induced in the rotor (d) Constant magnitude of flux linking the rotor core of its full load rated currentarrow_forward
- A freewheeling DC motor is driven with 1000 rpm and a nominal load torque of 80Nm. The field circuit resistance is 200 and the armature circuit resistance is 0.2 O. The field coils are fed with a zero degree transmission angle through a single-phase fully controlled converter connected to a single-phase 240V source. The armature circuit is fed from a single phase 400V source through another fully controlled converter. Magnetic saturation has been neglected, the motor constant is given as 0.8 V - s / A - rad. Assuming that there is no fluctuation in armature and field current, find the control angle of the converter feeding the armature at nominal load. If you want to leave the question blank, click again on the option you marked.arrow_forward١٣arrow_forwardThe reactance’s of the alternator during the periods of the subtransient, transient and steady state periods are following, Leakage reactance(XL)=0.16 ohm, Damper winding reactance(Xcd)= 0.25 ohm Field winding reactance(Xf)=0.57 ohm and Armature reactance (Xad)= 0.65 ohm. The value of the transient reactance during the transient conditions is Transient Reactance ...................................arrow_forward
- Answer is 2.93 hz. Take No. Of poles = 2.arrow_forwardThe reactance’s of the alternator during the periods of the subtransient, transient and steady state periods are following, Leakage reactance(XL)=0.13 ohm, Damper winding reactance(XD)= 0.27 ohm Field winding reactance(Xf)=0.54 ohm and Armature reactance (Xm)= 0.73 ohm. The value of the transient reactance during the transient conditions is Transient Reactancearrow_forwardState the types of induction motorarrow_forward
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