End of chapter exercises
... current changes with every half turn of the coil. As one side of the loop moves to the other pole of the magnetic field, the current in the loop changes direction. The two slip rings of the AC generator allow the coil to turn without breaking the connections to the load circuit. This type of current ...
... current changes with every half turn of the coil. As one side of the loop moves to the other pole of the magnetic field, the current in the loop changes direction. The two slip rings of the AC generator allow the coil to turn without breaking the connections to the load circuit. This type of current ...
Industrial Controls
... applications that require variable speed control, high torque, or both. Speed of most DC motors can be controlled smoothly and easily form zero to full speed. They are used in many acceleration and deceleration applications. ...
... applications that require variable speed control, high torque, or both. Speed of most DC motors can be controlled smoothly and easily form zero to full speed. They are used in many acceleration and deceleration applications. ...
VIII. DC Generators - Exercises
... Search through the text and find which component performs each of the functions described below. Note that some components may perform more than one functions. 1. It serves as a means of connecting the brushes to the armature. 2. It provides the rotating element in a dc generator. 3. It turns rotary ...
... Search through the text and find which component performs each of the functions described below. Note that some components may perform more than one functions. 1. It serves as a means of connecting the brushes to the armature. 2. It provides the rotating element in a dc generator. 3. It turns rotary ...
electrical machines - ce
... of wedge-shaped segments made of high-conductivity copper. These segments are insulated from one another by thin layers of mica.Each segment is connected to the armature conductor by means of a copper strip or plug. ...
... of wedge-shaped segments made of high-conductivity copper. These segments are insulated from one another by thin layers of mica.Each segment is connected to the armature conductor by means of a copper strip or plug. ...
Chapter 21 Electroma.. - hrsbstaff.ednet.ns.ca
... The end of loop connected to slipring commutator Connections to external circuit made by stationary brushes in contact with commutator When loop is 1/2 way through rotation in MF, the current flows one direction When completing other 1/2 rotation, the current flows in opposite direction producing al ...
... The end of loop connected to slipring commutator Connections to external circuit made by stationary brushes in contact with commutator When loop is 1/2 way through rotation in MF, the current flows one direction When completing other 1/2 rotation, the current flows in opposite direction producing al ...
Motorenfabrik HATZ-Diesel
... • not even one single part affected by mechanical wear • no rotating coils • no rotating electronic parts • no brushes, no slip rings • no sensitive voltage regulator • extreme high efficiency above 92 % at 9.5 kVA • completely closed alternator housing cooling air circulation taken from engine side ...
... • not even one single part affected by mechanical wear • no rotating coils • no rotating electronic parts • no brushes, no slip rings • no sensitive voltage regulator • extreme high efficiency above 92 % at 9.5 kVA • completely closed alternator housing cooling air circulation taken from engine side ...
Applying PMDC motors
... high voltage drop across the brush, and tend to be abrasive. These properties limit their use to low speed, high voltage, fractional horsepower motor applications. Electro-graphitic brushes use a form of graphite developed from carbon subjected to intense heat. They have high current capacity, a rel ...
... high voltage drop across the brush, and tend to be abrasive. These properties limit their use to low speed, high voltage, fractional horsepower motor applications. Electro-graphitic brushes use a form of graphite developed from carbon subjected to intense heat. They have high current capacity, a rel ...
How the solar motor works. - Solar
... The stack contains iron atoms. Each iron atom is a tiny magnet because of the nature of its electrons. When a winding is energised the magnetic field it creates makes the iron atoms in the stack line up with the field and each other. This has the effect of intensifying the magnetic field. The steel ...
... The stack contains iron atoms. Each iron atom is a tiny magnet because of the nature of its electrons. When a winding is energised the magnetic field it creates makes the iron atoms in the stack line up with the field and each other. This has the effect of intensifying the magnetic field. The steel ...
Commutator (electric)
A commutator is the moving part of a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine. The commutator is one component of a motor; there are also two or more stationary electrical contacts called ""brushes"" made of a soft conductor like carbon press against the commutator, making sliding contact with successive segments of the commutator as it rotates. The windings (coils of wire) on the armature are connected to the commutator segments. Commutators are used in direct current (DC) machines: dynamos (DC generators) and many DC motors as well as universal motors. In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force (torque) is produced. In a generator the commutator picks off the current generated in the windings, reversing the direction of the current with each half turn, serving as a mechanical rectifier to convert the alternating current from the windings to unidirectional direct current in the external load circuit. The first direct current commutator-type machine, the dynamo, was built by Hippolyte Pixii in 1832, based on a suggestion by André-Marie Ampère. Commutators are relatively inefficient, and also require periodic maintenance such as brush replacement. Therefore, commutated machines are declining in use, being replaced by alternating current (AC) machines, and in recent years by brushless DC motors which use semiconductor switches.