Stray losses represent: O A. Resistive losses in the windings of the machine O B. Losses due to friction of the moving parts O C. Losses due to magnetization and demagnetization of the core O D. Windage losses O E. None of the other choices are correct

Q: A 6-pole armature of a d.c. machine has 776 conductors and a flux per pole of 35 mWb. Determine the…

A: Choose the correct option Emf voltage of the DC Generator for LAP winding We know Emf E=…

Q: A D.C series motor hoists a load at 4 m/sec while taking 30 A at 300 V from D.C mains. The total…

A:

Q: Q3. A 4-pole machine has an armature with 90 slots and 8 conductors per slot, the flux per pole is…

A: The total number of the conductor in the armature is determined as: Z=90 slots8 conductors per…

Q: A DC generator has armature emf of 200 V when it works on full flux/pole 40 mWb, and speed of 500…

A: Given: For the 1st DC generator, EMF, E1=200 V Flux, φ1=40 mWb. Speed, N1=500 rpm.   For the 2nd DC…

Q: An autotransformer is shown in Figure P14.68. Assume that all of the flux links all of the turns and…

A:

Q: In a PMMC, analyze the changes in deflection torque produced with Increments in flux per pole. Oa…

A: In PMMC analysis, the change in the deflection torque produce with increment in the flux per pole,…

Q: a)find the flux density in airgap. b)if the stator is excited with 50 Hz current, find the…

A: Given: A 2 pole synchronous machine in which lg=2.5mmAg=500cm2I=5AN=500μc=∞ According to question:…

Q: A thicker wire is used in the DC series field winding than DC shunt field winding in DC machines. *…

A: current carrying capacity of wire is directly proportional to area of wire. i.e. thicker the wire ,…

Q: na dc machine when the number of parallels paths is (a) and the number of poles is (p), chus for lap…

A: Given In lap winding DC machine Number of parallel paths = a Number of poles = p

Q: The core of an electro-magnetic structure is Laminated in order to: reduce the Stacking Factor…

A: Core of the transformer:- The core is constructed of numerous thin strips of grain-oriented silicon…

Q: Q\ Compare between Variable reluctance (VR) type and permanent magnet (PM) type and Hybrid type

A: permanent magnet motor is used to magnet imbedded into a surface of the motor rotor. it is used in a…

Q: Mechanical losses represent: A. Windage losses B. None of the other choices are correct O C. Losses…

A: In this answer let us try to understand what are mechanical losses as explained below.

Q: Iron losses represent: O A. Losses due to friction of the moving parts O B. Losses due to…

A: Iron losses are defined as those type of losses that practically occur in an unloaded and loaded…

Q: - Indicate whether the following statement are true or false * True False In a dc machine for the…

A:

Q: 4- In DC Shunt genrator, the effect of flux Produced by armater on main Flux Produced by the field…

A:

Q: In a DC machine, _provides the magnetic path as well as the mechanical support to the whole machine.…

A: we will consider function of each option to answer the given question .

Q: b) A newly built institution has bought a D.C. shunt generator to supply a library in order for…

A:

Q: 6) Flashing the field of D.C. generator means A. Neutralizing residual magnetism B. Creating…

A:

Q: - Indicate whether the following statement are true or false

A: in the DC machine the emf can be calculated using the following equation E =  ∅ZPN / 60 A

Q: Q25) i) What are the factors that the induced voltage in three phase induction motor depends upon…

A: Factors that the induced voltage in three phase induction motor depends upon : 1. Magnitude of…

Q: What type of Power Losses does windage loss, bearing and brush friction loss is considered? a Stray…

A: Copper losses are losses due flow of current in winding. Copper loss in DC machine occurs in both…

Q: 16 A 2-pole d.c. shunt generator has a useful flux per pole of 0.03 Wb. The armature winding consist…

A: DC shunt generator No of pole 2 Speed N= 1200 rpm Flux per pole 0.03 No of turns 200 No of…

Q: Electric Machines2 What are the characteristics of the rotating magnetic field created by…

A: The rotating magnetic field created by the three-phase current in three-phase stator winding: When a…

Q: R1 jX1 jX2 -> IM R, RC jXM E1 S

A: Induction motor working Principle When an ac supply is connected to a stator it creates a rotating…

Q: which is the best method for reducing armature reaction O a. Using High reluctance pole time O b.…

A: In this question,  Choose the correct option Which is the best method for reducing armature…

Q: Write the types and shortly explain the magnetic losses for electrical machines

A: we need to explain the types and shortly explain the magnetic losses for electrical machines

Q: An electromagnet has a movable iron part and dimensions of magnetic circuit with uniform cross…

A: a) R= 1697652.73 H-1, L= 9.694 mHb) flux= 70.69 micro Wb, flux density= 0.118 T, field intensity of…

Q: Q choose the correct answer: 1-Brushless excitation system consisting of.... a- Stator field winding…

A: Given

Winding and Constructions

Alternating Current (AC) winding is generally of the 3-phase type due to the inherent advantages of the 3-phase machine. Armature coils must be connected to the yield balance (equivalent in magnitude and 2/3 of the series phase difference of the rod) 3-phase electromotive forces (emf). The armature should be divided into step-bands to start with slots around the perimeter.In the construction of AC machines, the frame is used as an external protective shield to protect it from environmental conditions. The frame also serves as the outer perimeter, allowing the interior to be easily placed. The static state section of the devices is the stator winding attached stator.