A single-phase full converter is used to control the speed of a 5 hp,110V,1200 rpm, separately...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
A single-phase full converter is used to control the speed of a 5 hp,110V,1200 rpm, separately excited dc motor. The converter is connected to a single-phase 120V,60 Hz supply. The armature resistance is R₂=0.4 ohms and armature circuit inductance La=5mH (Assume that the armature current is ripple free). The motor voltage constant is Ko=0.09 V/rpm. 1. Rectifier (or motoring) operation. The dc machine operates as a motor runs at 1000 rpm and carries an armature current of 30 amperes. Assume that motor current is ripple-free. (a) Determine the firing angle a. (b) Determine the power to the motor. (c) c) Determine the supply power factor 2. Inverter operation (regenerative action). The polarity of the motor back emf Ea is reversed ,say by reversing the field excitation. (a) Determine the firing angle to keep the motor current at 30 amperes when the speed is 1000 rpm. (b) Determine the power fed back to the supply at 1000 rpm. A single-phase full converter is used to control the speed of a 5 hp,110V,1200 rpm, separately excited dc motor. The converter is connected to a single-phase 120V,60 Hz supply. The armature resistance is R₂=0.4 ohms and armature circuit inductance La=5mH (Assume that the armature current is ripple free). The motor voltage constant is Ko=0.09 V/rpm. 1. Rectifier (or motoring) operation. The dc machine operates as a motor runs at 1000 rpm and carries an armature current of 30 amperes. Assume that motor current is ripple-free. (a) Determine the firing angle a. (b) Determine the power to the motor. (c) c) Determine the supply power factor 2. Inverter operation (regenerative action). The polarity of the motor back emf Ea is reversed ,say by reversing the field excitation. (a) Determine the firing angle to keep the motor current at 30 amperes when the speed is 1000 rpm. (b) Determine the power fed back to the supply at 1000 rpm.
Expert Answer:
Answer rating: 100% (QA)
To solve the given problems we will use the following formulas and equations 1 Rectifier Operation a ... View the full answer
Related Book For
Posted Date:
Students also viewed these accounting questions
-
A 20N force acts perpendicular to the door 0.8m wide at its edge. Find moment at hinges. Also find moment at hinges if 20N force acts at 60 with the plane of door. i) 20N force acting perpendicular...
-
Develop an analysis of inflation by including the following: Choose a product or service you currently consume/use, such as apparel or educational services, that is included in the CPI's "market...
-
A differential band brake is used to control the speed of a drum which rotates at a constant speed. Knowing that the coefficient of kinetic friction between the belt and the drum is 0.30 and that a...
-
Consider an electric motor with a shaft power output of 20 kW and an efficiency of 88 percent. Determine the rate at which the motor dissipates heat to the room it is in when the motor operates at...
-
The capacitor in Figure P5.36a is 51 nF with a tolerance of 10%. Given the voltage waveform in Figure P5.36b graph the current i(t) for the minimum and maximum capacitor values. i t) 60 V(t) 60 time...
-
Lopez, Cruz, and Perez are partners and share net income and loss in a 6:4:1 ratio. On December 31, Perez withdraws from the partnership when the equities of the partners are: Lopez, $3,000; Cruz,...
-
Let the random variables \(U_{1}\) and \(U_{2}\) be jointly Gaussian, with zero means, equal variances, and correlation coefficient \(ho eq 0\). Consider the new random variables \(V_{1}\) and...
-
Multiple Choice Questions 1. As a golf club production company produces more clubs, the average total cost of each club produced decreases. This is because: a. Total fixed costs are decreasing as...
-
4- Consider a 32Mx8 SDRAM chip shown below 8-bit chunk Rows =8k Banks =4 Columns =1k (a) Suppose a PC has a 64-bit system (i.e., memory) bus. How many 32Mx8 SDRAM chips would be required to implement...
-
What are the most significant differences between the AICPA and the PCAOB standard unmodified opinion audit reports?
-
On December 3 1 , Mars Company had the following portfolio of stock investments with insignificant influence. Mars had no stock investments in prior periods. Stock Investments Cost Fair Value Apple...
-
Significant Areas of Divergence. Many areas of divergence exist between the U.S. and Latin American assumptions, perceptions, interests, goals, and priorities. They range from national interests to...
-
How would a program be written to print out numbers in Fibonacci sequence? How would the 1st 200 numbers in the sequence be printed? 2. How would code be written in FileA.java to analyze par.txt to...
-
Demonstrate the shortcut formula necessary to calculate sales dollars required to meet a target net income of $1,700 if the company has a sales price of $125, variable cost of $75, and fixed costs of...
-
5) A very thick slab has a uniform concentratio of solute A of C0-1x10^-2 mol /m^3 suddenly,the front face of the slab is exposed to a fluid having a concentration of solute A of C1= 0.10 mol/m^3 a)...
-
Christine owns a bakery in her community and has 2 adult children who are actively involved in the business. She would like to pass the business to her children when she dies, although she expects...
-
From the list of list of reagents available, show how to bring about each step of this synthesis. ________________________________________ _____________________________________________ OH OH OH (5)...
-
Is it a breach of fiduciary duty for a director of a real estate investment trust (REIT) negotiating a joint venture on behalf of the REIT with another director for the development of a portfolio of...
-
The following data are obtained from tests on a 145-MVA, 13.8-kV, three phase, 60-Hz, 72-pole hydroelectric generator. Open-circuit characteristic: Short-circuit test: If = 710 A, Ia = 6070 A a. Draw...
-
A synchronous machine with a synchronous reactance of 1.28 per unit is operating as a generator at a real power loading of 0.6 per unit connected to a system with a series reactance of 0.07 per unit....
-
A two-phase permanent-magnet ac motor has a rated speed of 3000 r/min and a six-pole rotor. Calculate the frequency (in Hz) of the armature voltage required to operate at this speed.
-
What are the differences between the light stall and the deep stall. Comment on the differences as regards the sectional lift and the moment coefficients.
-
At high angles of attack, the empirical formulae for the lift and moment coefficients for airfoils pitching at high frequencies are given in terms of maximum dynamic moment coefficient \(\left(C_{M}...
-
During dynamic stall, the drag coefficient is less for pitch-up than for pitch-down, whereas the lift coefficient is larger for pitch-up than for pitch-down. Why?
Study smarter with the SolutionInn App