Obtain rated fundamental voltage across the motor, Electrical Engineering

Assignment Help:

A 440-V, 60-Hz, six-pole, wye-connected, squirrel-cage induction motor with a full-load speed of 1170 r/min has the following parameters per phase referred to the stator: R1 = 0.2 , R'2 = 0.1 , Xl1 = 0.75 , Xl2 = 0.7 , and Xm = 20. Consider the motor to be fed by a six-step inverter, which in turn is fed by a six-pulse, fully controlled rectifier.

(a) Let the rectifier be fed by an ac source of 440 V and 60 Hz. Find the rectifier firing angle that will obtain rated fundamental voltage across the motor.

(b) Calculate the inverter frequency at 570 r/min and rated torque when themotor is operated at a constant flux.

(c) Now let the drive be operated at a constant V/f ratio. Compute the inverter frequency at 570 r/min and half the rated torque. Neglect the derating due to harmonics and use the approximate equivalent circuit of Figure, with jXm shifted to the supply terminals.

1581_Obtain rated fundamental voltage across the motor.png


Related Discussions:- Obtain rated fundamental voltage across the motor

CMA instruction of 8051., if contents of accumulator are all one''s then re...

if contents of accumulator are all one''s then result would be zero so Z flag should be affected and same if all zero''s.....but here it is written that no flags is affected...

Multi-link connection in a network of register, Q. Multi-link connection in...

Q. Multi-link connection in a network of register? For a multi-link connection in a network of register- controlled exchanges, a register in originating exchange receives addre

Evaluate the quiescent point of the circuit, Question: a). For the circ...

Question: a). For the circuit shown in figure state which operation is performed and draw the output waveform if measured between points A and B. The input signal is given in f

Dsp causal LTI system, cosider a causal LTI system whose system function is...

cosider a causal LTI system whose system function is H(z)=1-1/5z^-1/(1-1/2z^-1+1/3z^-2)(1+1/4z^-1) find the direct form 1 and direct form 2

Transistor, can you differentiate the alpha,beta and gamma

can you differentiate the alpha,beta and gamma

Show maximum common-mode input voltage, Q. Show Maximum Common-Mode Input V...

Q. Show Maximum Common-Mode Input Voltage of amplifier? This is the maximum voltage that the two inputs can be raised above ground potential before the op amp becomes nonlinear

Unijunction transistor, UniJunction Transistor: (abbreviated as UJT)...

UniJunction Transistor: (abbreviated as UJT), also called the double base diode, is a 2 layer, 3 terminal solid state switching device. The device has a unique characteristi

Adaptive control process in motor-speed control system, Q. Adaptive control...

Q. Adaptive control process in motor-speed control system? Figure illustrates the adaptive control process as applied to a motor-speed control system, which is based on adjus

Show npn common base amplifier, Q. Show NPN Common Base Amplifier? ...

Q. Show NPN Common Base Amplifier? This configuration is used for high frequency applications because the base separates the input and output, minimizing oscillations at h

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