Static rotor resistance control methods - motor control , Electrical Engineering

Assignment Help:

Static Rotor Resistance Control Methods

This method is used only for slip  ring induction motor in SRIM  3- phase  variable  resistor can be inserted in the rotor  circuit and by  varying this resistance in the rotor  circuit and by  varying this resistance  the motor  torque and hence speed  of th motor  can be  controlled. This methods  is  used when speed drop  is required for a short  time.

It has some  disadvantages if rotor  resistances are  not equal unbalances in voltages and  currents  occur at low  speeds efficiency is reduced and with  load variation speed  is changed very  quickly therefore  chopper circuit  is used.


Related Discussions:- Static rotor resistance control methods - motor control

Obtain the thevenin equivalent at terminals, Consider the circuit of Figure...

Consider the circuit of Figure (a), including a dependent source. Obtain the Thévenin equivalent at terminals a-b.

Program implementing the conjugate gradient method, Write a program impleme...

Write a program implementing the conjugate gradient method (un-preconditioned). Solve the  matrix equation corresponding to a finite difference node-spacing, h = 0.02m in x and y d

Digital signal processing, A DT LTI system has the following impulse respon...

A DT LTI system has the following impulse response: h(n)=[cos(pi/+delta(n)] u(n-3)u(n-2) (a) Find the system’s frequency response h(e^jw ). (b) Sketch the magnitude and phase respo

Pinch off voltage, Pinch off Voltage: The current in N-JFET because of...

Pinch off Voltage: The current in N-JFET because of a small voltage V DS  is described by: I DSS = (2a) W/L (qN d μ n V DS ) In which 2a  = channel thickness

Wcdma, what is that mean and explain

what is that mean and explain

Draw a state diagram of 3-bit ripple counter, The block diagram for a 3-bit...

The block diagram for a 3-bit ripple counter is shown in Figure (a). Obtain a state table for the number of pulses N = 0 to 8, and draw a state diagram to explain its operation.

Why 8085 processor is called an 8 bit processor, 8085 processor has 8 bit A...

8085 processor has 8 bit ALU (Arithmetic Logic Review). Likewise 8086 processor has 16 bit ALU.

Find the voltage , 1. Find the current through each component, in pola...

1. Find the current through each component, in polar form, using mesh analysis. The source voltages are rms with an angle of 0 degrees. 2. Find the current t

Compute the current loss in the lines, Q. Consider a 240-V supply feeding a...

Q. Consider a 240-V supply feeding a resistive load of 10 kW through wires having a total resistance of R = 0.02 . For the same load, let a 120-V supply be used with a total wire

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