Dc motor characteristics, Electrical Engineering

Assignment Help:

Q. DC Motor Characteristics?

We gain an understanding of the speed-torque characteristics of a dc motor from Equations. In shunt motors, the field current can be simply controlled by the use of a variable resistance in series with the field winding; the load current influences the flux only through armature reaction, and its effect is therefore relatively small. In series motors, the flux is largely determined by the armature current, which is also the field current;

it is somewhat difficult to control the armature and field currents independently. In the compound motor, the effect of the armature current on the flux depends on the degree of compounding. Most motors are designed to develop a given horsepower at a specified speed, and it follows from Equation that the angular velocity ωm can be expressed as

1356_DC Motor Characteristics.png

Thus, the speed of a dcmotor depends on the values of the applied voltage Vt, the armature current Ia, the resistance Ra, and the field flux per pole φ.


Related Discussions:- Dc motor characteristics

Principles behind ecg monitoring, a) Provide pertinent summary of the basic...

a) Provide pertinent summary of the basic principles behind ECG monitoring b) Using MATLAB, provide plots of the "clean" and "noisy" ECG signals. Investigate the spectral es

Crm triangle, CRM Triangle The following diagram which is called as CR...

CRM Triangle The following diagram which is called as CRM Triangle. Strategy refers to the whole stand taken through the company. It could selected a defensive posture in t

Control system., how does Proportional band affect the performance of contr...

how does Proportional band affect the performance of control system?

Find the power factor and current of the machine, Two identical three-phase...

Two identical three-phase, 33-kV, wye connected, synchronous generators operating in parallel share equally a total load of 12 MW at 0.8 lagging power factor. The synchronous react

Circuit realization of the srff, Q. You are to construct a modified truth t...

Q. You are to construct a modified truth table for the circuit realization of the SRFF shown in Figure. As indicated in the text, you guess an output and then go back ato check it

ERT, What are the applications for solar PV system? Explain one of the appl...

What are the applications for solar PV system? Explain one of the application with neat schematic diagram.

Explain the memory map of transient program area in a pc, Draw the memory m...

Draw the memory map of TPA in a personal computer and explain different areas. The transient program area holds the DOS operating system and other programs which control the co

Give the register organization of 8257, Give the register organization of 8...

Give the register organization of 8257? The 8257 do the DMA operation over four independent DMA channels. Each of the four channels of 8257 has a couple of two 16-bit registers

Working of equalizer circuit, Q. Working of Equalizer circuit? Equalize...

Q. Working of Equalizer circuit? Equalizer circuit: Equalizers are combination of passive components (capacitors, resistors and so on) that are used to regulate the amplitude a

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