Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Armature Winding
In this winding the working emf is induced by the working flux.
The current which is dependent on the load called current. The windings that handles only exciting current is called field winding. Current in fields windings is always DC. It is also known as fields current of magnetizing current. It produces only a working magnetic flux. It is independent to load. Armature winding carries only load current.
Before discussing the methods of speed control of DC motor it is important to know about the classification of DC motor. According to excitation of the filed self excited DC motor further divided into three types Dc series motor shunt motor and DC compound motor.
Figure DC Motor Separately excited(b) Shunt (c) Series (d) Compound
The commonly used DC motors are shown in separately excited motor the field and armature voltage can be controlled independent of each other. In a shunt motor field and armature are connected common source. In case of a series motor fields current is some as armature current and therefore fields flux is a functions of armature current. In a compound motor the mmf of the series fields is a functions of armature current and is in the same direction as mmf of the shunt fields.
For separately excited and shunt motors it is equal to the resistance of armature windings and for series and compound motors it is the sum of armature and fields winding resistances.
(a) Figure shows a circuit containing an amplifier block. Find the open-circuit voltage amplification of the circuit. (b) Let the output terminals be connected to a load resista
1,Operation of face plate starter 2;Operation of a shaded pole motor 3,3 explained demerits of a rheostat method of starting adc machines
A 3 phase, 6 pole induction motor is rated at 400hz, 150v, 10h.p., 3% slip at rated power output. The windage and friction loss is 200w at rated speed. With the motor operating at
i have to design a project title "Edge determining techniques for Low quality images in different lighting conditions and we use matlab for images simulation by changing different
Q. Explain Read-only memory? ROM is nonvolatile (because it maintains its contents even when its power is shut off) and is used to store data and programs that do not change du
Q. What do you mean by Resistance? An ideal resistor is a circuit element with the property that the current through it is linearly proportional to the potential difference acr
List the different types of flags affected by the arithmetic and logic operations. Carry flag, Auxiliary carry flag , Parity flag, Sign flag, Zero flag
Explain Ferrimagnetic magnetic materials. Ferrimagnetic Materials: In such materials unequal magnetic dipoles are lined up anti-parallel to each other. And permeabilities are
You have been hired by Serge Brink and Larry Park to assist them in the evaluation of a recently issued term sheet from Global VC Partners. The new venture is an Internet startu
Explain the delay model based on logical effort often used in estimating delays in logic cells. Hence use the model to predict the delay of a 4-input NOR logic cell with a 3 times
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd