Compound motor , Electrical Engineering

Assignment Help:

Compound motor

It is possible to arrange for part of the field  coil to be in series with the armature and part in parallel

570_compound motor.png

 

This gives rise to a motor with a mix of the characteristics of shunt and series connected motors, the mix depending upon the armature connection point in the field winding.

Power production
 
The mechanical power produced by a motor is:
 
P = T . ω
 
(power is in watts if torque is N.m and ω in rad/sec). Some of this will be lost due to friction and windage. The remainder is available as mechanical output power. The input electrical power that is converted to mechanical power is that due to the product of the back emf and the armature current.

 

Hence

P = e. Ia



Note that e is not equal to the applied voltage, V. Some electrical power is dissipated due to the armature resistance and field coil resistance. (In an ac motor, other losses occur due to magnetisation and eddy current losses).

 

1716_compound motor 1.png


Related Discussions:- Compound motor

Dc Machine, Why maximum power output is given by a machine at an efficiency...

Why maximum power output is given by a machine at an efficiency of 50 percent?

What is schokleys equation, Q. What is Schokleys Equation. Find out a relat...

Q. What is Schokleys Equation. Find out a relation between Vgs and Ids? Schokleys Equation is used for defining the relation between the Gate source voltage and the Drain curre

Major advantages of fet transistors over bjt transistors, Q. What the major...

Q. What the major advantages FET transistors over BJT transistors? a. BJT transistor (bipolar junction transistor) is a bipolar device - the prefix bi-revealing that the conduc

De multiplexing address data bus, De multiplexing Address Data Bus (AD 7 - ...

De multiplexing Address Data Bus (AD 7 - AD 0 ) As it is already discussed that  lower  order address bus (A 7 - A 0 )  is multiplexed  with data bus (D 7 - D 0 ). Hence  pins

Draw a relay construction diagram, Draw a relay construction diagram and br...

Draw a relay construction diagram and briefly explain the operation of a relay. Define the terms normally open and normally closed. Define the terms Set and Reset for relays.

Ac generators - the alternator, In practice, it is usually better to wind t...

In practice, it is usually better to wind the field coils on the rotor and supply the field current to them via slip rings.  As the rotor turns, the changing magnetic field expe

Show frequency response using pspice and probe, Q. Show Frequency response ...

Q. Show Frequency response using pspice and probe? PSpice is capable of performing transient circuit analysis, for which the request is given by the following statement: • T

Find whether the load impedance is capacitive or inductive, Q. When the two...

Q. When the two-wattmeter method for measuring three-phase power is used on a certain balanced load, readings of 1200W and 400W are obtained (without any reversals). Determine the

What does the eu do, Execution Unit receives program instruction codes and ...

Execution Unit receives program instruction codes and data from BIU, implements these instructions and store the result in general registers.

List the operation modes of 8255, List the operation modes of 8255 a) ...

List the operation modes of 8255 a) I.O Mode i. Mode 0-Simple Input/Output. ii. Mode 1-Strobed Input/Output (Handshake mode) iii. Mode 2-Strobed bidirectional mode

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd