Definitions Flashcards
What is a winding often located on the stator, used to create magnetic flux?
FIELD
The field winding plays a crucial role in generating the magnetic field necessary for operation in electrical machines.
What is a rotating electrical machine that converts electrical energy into mechanical energy?
MOTOR
Motors are essential components in various applications, translating electrical energy into mechanical work.
What is the term for a winding located between the main poles, connected in series with the armature winding and used to reduce the effects of armature reaction?
COMPENSATING
Compensating windings help improve the performance and stability of motors and generators.
What connects the armature winding to the external electric circuit, commonly constructed out of carbon-graphite?
BRUSHES
Brushes are critical for providing electrical contact to the rotating armature in machines.
What is connected to the pole core, shaped in a curve to increase flux distribution across the rotor core?
POLE SHOE
The pole shoe enhances the magnetic field’s effectiveness by spreading it more uniformly.
What is an electrical machine that converts electric energy to mechanical energy or mechanical to electrical energy?
Dynamo
Dynamo could function as a dc generator or dc motor
What is connected to the rotor shaft of a generator and causes the rotor to spin?
PRIME MOVER
The prime mover can be a turbine, engine, or any device that provides the mechanical input to the generator.
What is the space between the rotor and the pole shoe, designed to be as small as possible?
AIR GAP
A smaller air gap generally increases the efficiency of the machine by reducing magnetic reluctance.
What is constructed with hard drawn copper arranged around the rotor shaft and connected directly to the armature winding?
COMMUTATOR
The commutator is essential in converting alternating current generated in the armature to direct current in the external circuit.
What is a machine capable of converting mechanical energy into electrical energy?
GENERATOR
Generators are crucial for the conversion of kinetic energy into electrical energy for use in power systems.
What is a winding installed into the pole face of the pole shoe and connected in series with the armature winding to reduce the effects of armature reaction?
COMPENSATING
Compensating windings are specifically designed to counteract the negative effects of armature reaction.
What is connected to the frame and the pole shoe, used to support the field winding?
POLE CORE
The pole core provides structural support and magnetic pathways for the field winding.
What is a winding typically wrapped around the rotor core, designed to carry the highest value of current in the machine?
ARMATURE
The armature is crucial for the conversion of electrical energy to mechanical energy in machines.
What is usually referred to as the frame, where the field poles are bolted or welded to?
YOKE
The yoke provides mechanical support and contributes to the magnetic circuit.
What is constructed of laminated steel and mounted on the shaft?
ROTOR CORE
The rotor core is designed to minimize eddy currents and improve efficiency.
True or False: As the magnetic field intensity produced by a coil increases, the flux density of its iron core decreases.
False
Increasing magnetic field intensity typically results in an increase in flux density.
A ‘ synchronous generator’ is ? What does it do and what is it measured in ?
Alternator
Creates alternating current when being rotated and they can deliver rated voltage at a specific slows without overheating.
Measured in : Volt Amps
