Does the speed of a shunt motor increase or decrease when the armature current increases? 5. What is the advantage of decreasing the field current of a separately-excited dc motor below its nominal value?

Q: A 480-V, 60 Hz, 400-hp 0.8-PF-leading eight-pole delta-connected synchronous motor has a synchronous…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: Field winding resistance of DC shunt motor compared to its armature resistance is Equal Samller…

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Q: A certain 480-V-rms delta-connected synchronous motor operates with zero developed power and draws a…

A: Write the given values in the question.

Q: Explain with proper diagrams, how does the increase of field resistance for speed control in a small…

A: The connection diagram of a shunt motor of the field resistance control method (Flux control method)…

Q: A separately excited dc generator is rated for a load voltage of 150 V for a full load current of 20…

A: For the separately executed DC generator, the armature current (Ia) is equal to the load current…

Q: Q-1: SPEED CONTROL OF SEPARATELY EXCITED DC MOTOR By field resistance speed control Change the…

A: Need to find new speed

Q: A 30 hp, 240 V, 1150 rpm DC shunt motor, operating at rated conditions, has an efficiency of 88.5…

A: Given:Pout=30hp=30×746Pout=22380WV=240VoltN=1150 rpmη=88.5%Ra=0.064ΩRf=93.6Ω

Q: What are the advantages of shunt de motor?

A: A DC shunt motor is the motor which is self excited in nature and the field connection is in…

Q: What is the difference between Self Excited and Separately Exited DC motor?

A: In Self excited DC motor, the current required to generate flux in field winding is supplied by the…

Q: "Explain why speed of a DC motor get affected on load, if its series field winding is connected…

A: DC motor emf equation is given as, E=NPϕZ60AN=EA60PϕZk=PZ60ASo, N=EKϕ The torque equation of the DC…

Q: Question 8: A terminal voltage for DC shunt motor is 230V and the armature resistance of 1 Q and…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Electrical Engineering.  Explain briefly in one sentence how do we maximize the value of the…

A: Consider the formula for the armature current in terms of terminal voltage and armature voltage is,…

Q: 4. What are the characteristics of DC Shunt Motor?

A: The various characteristics of dc shunt motor are as follows: i) Armature current-speed…

Q: Consider a shunt-connected dc motor. What are the names of the two windings? Which is on the stator?…

A: There are two windings in DC motors; Field winding which is used to setting up the magnetic field…

Q: What are the methods of speed control of the DC motor in Electrical Engineering? Explain them.

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Q: 1. Why is DC Motor current so high?  2. How can we reverse the direction of rotation of a DC motor?…

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Q: the relation between armature and field currents in a series connected DC motor is O It = If + la O…

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Q: Running at 1200 rpm from a 280-V source, a series-connected dc motor draws an armature current of 25…

A: Given data: The value of armature current is: 25 A The field resistance is: 0.2 Ω The expression for…

Q: Questions: 1 - why does the speed fall slightly when the d.c. shunt motor is loaded? 2- What is…

A: As per policy attempting only first question (1) (i) There are two different explanation for this…

Q: The characteristic (Speed versus armature current) of a dc shunt motor is known as the electrical…

A: The electrical characteristics are,

Q: The field winding resistance of DC shunt motor compared to its armature resistance is     Very high…

A: In this answer we will try to find about different windings in the DC machine as shown below and…

Q: 2. What happens if the additional resistance is added in series with armature? 3. What will happen…

A: 2. when an additional resistance is added to in series with the armature then the voltage drop of…

Q: ONE SENTENCE ONLY. how do we maximize the value of the armature current in a shunt dc motor in the…

A: Circuit for DC shunt motor, From emf equation of DC shunt motor, the armature current equation will…

Q: A 2300-V, 800 HP, 0.8-PF leading, 60-Hz, two-pole, Y-connected synchronous motor has a synchronous…

A: Given, 2300-V, 800 HP, 0.8-PF leading, 60-Hz, two-pole, Y-connected synchronous motor has a…

Q: Field winding resistance of DC shunt motor compared to its armature resistance is O Equal Samller…

A: In a DC Shunt motor, there are two windings, 1. Armature winding(it has armature resistance) 2.…

Q: Derive an expression for armature torque of a dc motor in terms of back emf, armature current and…

A: we need to derive an expression for armature torque.

Q: A 75-HP, three-phase, six-pole, 60-Hz, Y-connected, cylindrical-rotor synchronous motor has…

A:

Q: 2. In a DC shunt motor, what will be the armature current at maximum load?

A: In the DC shunt motor, the armature current is given by, Ia=IL-If Where Ia is armature current, If…

Q: A dc shunt motor has a full-load rating of 240 volts, 1,500rpm, 20 HP, and 50 Amperes. The armature…

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Q: A 10-hp, 120-V, 1000 rpm shunt DC motor has a full load armature current of 70 A when operating at…

A: We are given that for a 100 hp dc shunt motor: Terminal Voltage (Vt) = 120 Volt; Motor speed (N01) =…

Q: Sketch the torque versus speed characteristic for a shunt-connected dc motor. What happens to the…

A: Given:  The torque versus speed characteristic for a shunt-connected dc motor. What happens to the…

Q: The characteristic (Speed versus armature current) of a dc shunt motor is known as the electrical…

A: Electrical characteristics are the drawn between armature current on X axis and speed on Y axis.

Q: A 2300-V, 800 HP, 0.8-PF leading, 60-Hz, two-pole, Y-connected synchronous motor has a synchronous…

A:

Q: A 10-hp, 120-V, 1000 rpm shunt DC motor has a full load armature current of 70 A when operating at…

A: We are given that for a 100 hp dc shunt motor: Terminal Voltage (Vt) = 120 Volt; Motor speed (N01) =…

Q: 1. Explain briefly in one(1) sentence how do we maximize the value of the armature current in a…

A: (1) When the load gets added to shunt wound DC motor the speed gets reduced and along with the speed…

Q: Why a DC shunt wound motor has a medium starting torque as compared to other

A: In a DC shunt wound motor, the armature winding is parallel to the shunt field winding. The voltage…

Q: How can the speed of a shunt DC motor be controlled

A:

Q: 4. What advantage you can obtain from an over excited synchronous motor at no load?

A: Over Excited Synchronous Motor If DC field excitation of  synchronous motor is such that back EMF…

Q: When the speed of the dc motor is varied by changing the armature resistance, is to be held…

A: Armature resistance method is used for controlling the speed of DC machine. The armature resistance…

Q: For a shunt DC motor, if the field circuit is open, what will happen? Why? A series DC motor gives…

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Q: The armature terminal voltage of a separately-excited DC motor increases while the field current and…

A: DC motors:- Direct current motors are used for the conversion of electrical energy into mechanical…

Q: Describe the constant torque and constant power operating states of the DC motor.

A: Constant torque and constant power operating states of the DC motor :- In speed control of DC motor,…

Q: Calculate the power developed by the armature if the armature current is 25.5 A, neglecting the…

A: First we will find shunt field current. Now using shunt field current we will find back emf . Power…

Q: Prove that mechanical power developed by a self excited DC shunt motor is maximum when back EMF is…

A: we need to find prove Eb=V2, for maximum power.

Q: 28/ How can the speed of a shunt dc motor be ontrolled? Explain in detail.

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Q: Question 1: Answer all the following parts: a- Discuss the theory of operation of DC motor. b- What…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…