DRUM MOVING MOTOR FOR WASHING AND DRYER MACHINES
... electric motor which has coils on works as a stator. In this way magnetic field occurs in the caldron and this field rotates the drum. The production technology of high efficient servo motors having special compounds magnets, low loss of energy silicium sheet metals, brushless and synchronous reache ...
... electric motor which has coils on works as a stator. In this way magnetic field occurs in the caldron and this field rotates the drum. The production technology of high efficient servo motors having special compounds magnets, low loss of energy silicium sheet metals, brushless and synchronous reache ...
Synchronous Motor - UTK-EECS
... across the winding (Voc) as field current (If) in increased. Increase the field current by increasing the DC voltage across the field winding. Vary If from 0 to 1A in increments of 0.1A. 9. Set If to zero. ...
... across the winding (Voc) as field current (If) in increased. Increase the field current by increasing the DC voltage across the field winding. Vary If from 0 to 1A in increments of 0.1A. 9. Set If to zero. ...
Short questions and answers EE1251 Electrical Machines II 1. Why
... 5. Why do cylindrical Alternators operate with steam turbines? Steam turbines are found to operate at fairly good efficiency only at high speeds. The high speed operation of rotors tends to increase mechanical losses and so the rotors should have a smooth external surface. Hence, smooth cylindrical ...
... 5. Why do cylindrical Alternators operate with steam turbines? Steam turbines are found to operate at fairly good efficiency only at high speeds. The high speed operation of rotors tends to increase mechanical losses and so the rotors should have a smooth external surface. Hence, smooth cylindrical ...
time domain analysis of induction motor starting transients
... The capacitor size must be determined according to the terminal impedance of the auxiliary winding. Unfortunately, this impedance changes dramatically from the starting to the running condition. Hence, it is not practical to use only one fixed value capacitor for both starting and running. If both t ...
... The capacitor size must be determined according to the terminal impedance of the auxiliary winding. Unfortunately, this impedance changes dramatically from the starting to the running condition. Hence, it is not practical to use only one fixed value capacitor for both starting and running. If both t ...
2012
... 5. a) Compare and contrast Squirrel-cage and slip-ring motors with respect to construction, operation, and performance. b) The power input to the rotor of a 440V, 50Hz, 3-phase, 6-pole induction motor is 60KW. It is observed that the rotor emf makes 90 complete cycles per minute. Calculate i) slip i ...
... 5. a) Compare and contrast Squirrel-cage and slip-ring motors with respect to construction, operation, and performance. b) The power input to the rotor of a 440V, 50Hz, 3-phase, 6-pole induction motor is 60KW. It is observed that the rotor emf makes 90 complete cycles per minute. Calculate i) slip i ...
ELECTRICAL SYSTEMS
... significant effect on the electrical system. Up to 144" The jumper lines between batteries should be at least #00 gauge cable. The 144" to 180" length of the circuit has a bearing on the 180" to 230" amount of voltage loss which occurs in Chart A2 each cable. Be sure that all the circuits can handle ...
... significant effect on the electrical system. Up to 144" The jumper lines between batteries should be at least #00 gauge cable. The 144" to 180" length of the circuit has a bearing on the 180" to 230" amount of voltage loss which occurs in Chart A2 each cable. Be sure that all the circuits can handle ...
Lecture-7: Modeling of Real World Systems
... • The purpose of the cruise control system is to maintain a constant vehicle speed despite external disturbances, such as changes in wind or road grade. • This is accomplished by measuring the vehicle speed, comparing it to the desired speed, and automatically adjusting the throttle. ...
... • The purpose of the cruise control system is to maintain a constant vehicle speed despite external disturbances, such as changes in wind or road grade. • This is accomplished by measuring the vehicle speed, comparing it to the desired speed, and automatically adjusting the throttle. ...
instructions to tenderers
... (12) AC Cage motor : The squirrel cage rotor must be composed of a shaft to which a pack of magnetic sheet irons is fixed, where the slots suitable to contain the rotor winding must be set. The sheet iron pack must be 60 mm long, with external diameter of about 78 mm. To avoid the phenomenon of the ...
... (12) AC Cage motor : The squirrel cage rotor must be composed of a shaft to which a pack of magnetic sheet irons is fixed, where the slots suitable to contain the rotor winding must be set. The sheet iron pack must be 60 mm long, with external diameter of about 78 mm. To avoid the phenomenon of the ...
Generator
... A conductor (called the armature) is free to move along a set of rails. Current is applied so as to flow down the left rail across the armature, and back on the right rail. Due to the flown current, a magnetic field is established in the loop bounded by the source, the rails, and the armature. The c ...
... A conductor (called the armature) is free to move along a set of rails. Current is applied so as to flow down the left rail across the armature, and back on the right rail. Due to the flown current, a magnetic field is established in the loop bounded by the source, the rails, and the armature. The c ...
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.