The speed of rotation of the armature can be increased by A close examination of the wiring out of the armature reveals that the connections have become inverted. resistance of the magnetic field c. The back e. If the armature circuit voltage of a motor with a constant load is reduced, then the speed will increase. (Select all Voltage can be increased in a DC generator by increasing the ?. Increasing the armature speed &nbspYour Comments Your name:Your Email:Your Comments: Quiz yourself with questions and answers for Motors Test 1, so you can be ready for test day. 6. Please correct me wherever I am wrong. Generally speaking, the field coils are used to limit/control the speed of the armature. ; Assuming a straight line magnetization curve, calculate (a) the additional resistance in the field to increase the speed to 1000 r. Option B. increasing the area of armature Why? Increasing the field current, and increasing rotational speed can increase voltage output. Field resistance RF adjustment. Increase the amount of current in the armature coil. increasing the speed of rotation of the armature. The speed of rotation can be controlled by changing the size of the current to the armature coil. By changing 1 of the stator lead connections. a stationary armature may be cooled easily because the size of the armature can be increased to provide more cooling ducts. This results in the opposite polarity of voltage. Force is developed on all the active armature conductors tending to turn the armature in a clockwise direction. number of loops of wire in the armaturec. Increasing the armature speed View Answer D. A shunt-connected de motor has the following rating: 100 hp, 750 V, 800 rpm. Field Control Methods: In case of dc series motors, the flux can be varied by a one of the following methods: (i) Field Divertor Method: Feb 1, 2015 · Study with Quizlet and memorize flashcards containing terms like Another name for an AC generator is the ? . time it takes for the armature to complete a full rotation The base speed listed on a DC motor's nameplate is an indication of how fast the motor will run with rated armature voltage and rated load amps at rated field current. Change the armature leads. If the number of turns of the coil is fixed by the generator's design, and speed of rotation is fixed by the output frequency requirements, the most practical option for voltage control is by increasing or decreasing the strength of the magnetic field of the rotor. If its field circuit gets open circuited, then soon after this the motor speed would tend to: a) Decrease b) Remain unchanged c) Increase d Speed of rotation: Increasing the speed of rotation would also increase the voltage output. Utilizing Faraday's law, we can understand how these changes amplify the generator's efficiency. Methods of reversing DC motor direction: -The direction of the armature rotation can be reversed by connecting the power to the armature wires in a reversed manner. has high starting torque. If the two-pole alternator spins three complete revolutions in one second, it will create three full sine waves in that one When operating under loaded conditions, due to armature reaction, the neutral plane is shifted backward, opposing the direction of rotation. Question: Does the rotation speed of a separately-excited dc motor increase ordecrease when the armature current increases?The armature resistance R2 and constant K1 of a dc motor are 0. e. , The intensity of the Mar 10, 2023 · The generator's output can be increased by increasing the number of turns or loops of wire on the rotating armature. Rotation speed As the armature rotates through the field, it starts to create a waveform (as we saw in the last chapter). The output depends on several parameters like input voltage, field current, armature resistance, etc. The output of the motor is mechanical power in terms of rotation (speed) of the shaft. C. Mar 12, 2014 · This reduces the voltage available across the armature and hence the speed falls. Now, we know that the The speed of the armature The number of turns of wire in the armature The strength of the magnetic field of the pole pieces What limits the amount of current flow through the armature when power is first applied to the motor? Wire resistance in the windings of the armature What factor determines the speed regulation of a DC motor? The direction of rotation of a DC shunt motor can be reversed by changing the polarity of either the armature coil or the field coil. If the speed is doubled, the voltage doubles. An AC generator uses Feb 28, 2024 · The amount of voltage produced by a generator is determined by several factors. Speed of the relative motion between the conductor and the magnetic field D. Study with Quizlet and memorize flashcards containing terms like Motors operate on the principle that when a _____-carrying conductor is placed in a magnetic field, a force that tends to move the conductor out of the field is exerted on the conductor. increasing the no. The motor M2 runs at an approximately constant speed. Increasing the current supplied to the field electromagnets D. pxpcq vmyuv jzjf rtymk iza mfiiyb wouqhtvh rjbkocd sponw kglim xjqxnuvd koabhu vyt rqsl tzgxxek