Drive operating envelopes and induction machines, Electrical Engineering

Assignment Help:
Solve using data from the DC machine data sheet, using the "hot" resistance value for all calculations. Note that the value of K on the sheet is for rated (100%) field flux. Assume that the machine can safely handle as much current as the power converter can deliver to it. In addition, assume that all power semiconductors are ideal with zero voltage drop when they are on.

1. Consider a 2 hp, 850 rpm dc machine connected to a single-phase, fully-controlled thyristor bridge as shown in Fig. 2.9-4 (pg. 53), assuming that the series inductance is large enough to justify the assumption of infinite output inductance. The amplitude of the ac voltage source is 210 Vrms, the maximum thyristor current is 10 A and the phase control angle a can be varied over the full range from 0 to p rad. Assume that the maximum machine speed is 2000 rpm in either direction (i.e., ± 209.4 rad/s).

a) Plot the complete boundary envelope (i.e., capability curve) of the drive system''s torque-speed operating capabilities on a set of T-? axes, with torque T on the y-axis [in N-m] and speed ? on the x-axis [in rad/s]. Assume that the field flux is constant at its rated (100%) value. In addition, assume that the maximum armature current is determined by the maximum thyristor current rather than the rated machine current based on its rated power. Similarly, assume that the maximum applied armature voltage amplitude is determined by the maximum positive and negative rectifier output voltage (@a = 0 and a = p) rather than the rated machine voltage. What are the torque, speed, machine shaft power, and phase control angle a at the four corners of the operating envelope?

Related Discussions:- Drive operating envelopes and induction machines

Determine the time delay of the cable, Q. Determine the time delay of the c...

Q. Determine the time delay of the cable? An RG-213/U (radio guide 213/universal coaxial cable) is a small-sized, flexible, double-braided cable with silvered-copper conductors

Step up chopper - power supplies , Step Up Chopper In this  chopper av...

Step Up Chopper In this  chopper average output  voltage  is greater than  input  voltage. The circuit  different  mode  of operation and  current  waveforms are show. When

Determine resistance in ideal inverting summing amplifier, Q. In the ideal ...

Q. In the ideal inverting summing amplifier circuit with two inputs, for R f = 10 k, find R 1 and R 2 so that v o = -10v i1 -5 vi2 .

Module of the rated currents - transformer, Module of the rated currents - ...

Module of the rated currents - transformer: The transformer of the Face(Figure) 2 is a transformer of type Delta-Y (the neutral of Y is grounded). The rated output is of 1500

Can you draw robot configuration, a) Draw robot configuration. b) Explai...

a) Draw robot configuration. b) Explain the significance of end effectors. c) Define the terms (i) accuracy (ii) Repeatability (iii) Work volume (iv) Control Reso

Microprocessor, what is the function of CBW in the microprocessor

what is the function of CBW in the microprocessor

Explain the working of a depletion type mosfet, Q. With a cross sectional v...

Q. With a cross sectional view, explain the working of a depletion type MOSFET Draw a biasing amplifier circuit DEPLETION-TYPE MOSFET: Two types of FETs: JFETs and MOSFETs. MOS

Tunneling effect, what is tunneling effect ? With calculation.

what is tunneling effect ? With calculation.

Specific core indicators method, Specific Core Indicators Method This ...

Specific Core Indicators Method This technique emphasizes to assign the responsibility and create the accountability. It is possible in which for any of the main indicators, t

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