What does a diverter do in a generator?
Compound wound direct-current generator with the series winding of the diverter pole opposing the flux generated by the shunt wound main pole; provides a close voltage regulation.
What is the armature control method?
In the armature control method, the speed of the DC motor is directly proportional to the back emf (Eb) and Eb = V- IaRa. When supply voltage (V) and armature resistance Ra are kept constant, the Speed is directly proportional to armature current (Ia). The motor back EMF (Eb) and Speed of the motor can be changed.
What is a armature loop?
An armature (pictured on right) has a continuous series of windings from each bar on the commutator, which loop around the iron stack teeth and connect to the next bar on the commutator. The winding continues to loop all the way around the armature in the same manner.
What is armature voltage control?
The speed is directly proportional to the voltage applied across the armature. As the supply voltage is normally constant, the voltage across the armature can be controlled by adding a variable resistance in series with the armature as shown in the Fig. 1.
What size generator is needed to run a house?
5,000 to 7,500 watts
How Big of a Generator Do I Need to Run a House? With a generator rated at 5,000 to 7,500 watts, you can run even the most critical household equipment, including things such as refrigerator, freezer, well pump, and lighting circuits. A 7500-running watt generator can run all these appliances at once.
What are the disadvantages of armature resistance control?
Drawbacks of armature resistance control method: A large amount of power is wasted in the external resistance R and hence less efficient. It is restricted to keep the speed below the normal speed of the motor and increase in the speed above normal level is not possible.
What is the difference and advantage of armature over field control method?
Armature control is a closed loop system, while field control is an open loop system. Additional advantages of armature controlled DC motors include: Constant field current and torque: With the armature control method, the field current and torque levels remain constant throughout the application.
Why armature winding is stationary in an alternator?
1) The current is drawn directly from fixed terminals on the stator without the use of brush contacts. 2) The insulation of stationary armature winding is easier. 3) The number of sliding contacts (slip rings) is reduced. Moreover, the sliding contacts are used for low-voltage DC Source.