File
... When three phase supply is given to the stator of three phase induction motor, a rotating magnetic field is produced which rotates with synchronous speed. The flux passes through the air gap and cuts the rotor conductors which are stationary. Due to relative speed between rotating flux and sta ...
... When three phase supply is given to the stator of three phase induction motor, a rotating magnetic field is produced which rotates with synchronous speed. The flux passes through the air gap and cuts the rotor conductors which are stationary. Due to relative speed between rotating flux and sta ...
2012
... a) What are the advantages and disadvantages of STAR-STAR choice of 3-phase transformer connection? b) Two transformers are connected in open delta and supply a balanced 3-phase load of 240 KW at 400 volts and a power factor of 0.866 lagging. Determine. i) The Secondary line current ii) The KVA load ...
... a) What are the advantages and disadvantages of STAR-STAR choice of 3-phase transformer connection? b) Two transformers are connected in open delta and supply a balanced 3-phase load of 240 KW at 400 volts and a power factor of 0.866 lagging. Determine. i) The Secondary line current ii) The KVA load ...
Modelling of Single-Phase Induction Motor with External
... Many domestic appliances require low-power motors operating at constant speed that must start under load(compressors, pumps etc) Because of the reliability in operation the singlephase induction motor is one of the most widely used types of AC machines SPIM with external rotor is more advantageous f ...
... Many domestic appliances require low-power motors operating at constant speed that must start under load(compressors, pumps etc) Because of the reliability in operation the singlephase induction motor is one of the most widely used types of AC machines SPIM with external rotor is more advantageous f ...
1. Explain the constructional details of Alternator in detail with neat
... and, therefore, behaves as a capacitor. An over-excited synchronous motor running on no-load is known as synchronous condenser. When such a machine is connected in parallel with induction motors or other devices that operate at low lagging power factor, the leading kVAR supplied by the synchronous c ...
... and, therefore, behaves as a capacitor. An over-excited synchronous motor running on no-load is known as synchronous condenser. When such a machine is connected in parallel with induction motors or other devices that operate at low lagging power factor, the leading kVAR supplied by the synchronous c ...
TORQUE
... necessary that frequency changers be used. Invariably a station of this type will necessitate transformers to step down or step up the voltage supplied to or delivered from the frequency changer, since the highest voltage that is normally feasible for rotating machinery has been found to be about 13 ...
... necessary that frequency changers be used. Invariably a station of this type will necessitate transformers to step down or step up the voltage supplied to or delivered from the frequency changer, since the highest voltage that is normally feasible for rotating machinery has been found to be about 13 ...
GAC is the name of a series of bipolar chopper drives, suitable for
... GAC drives are realized in 250 x 100 x 56 mm format and are equipped with built-in power supply, screw-type terminals and brackets for mounting simplicity inside electrical cabinets. Due to this, they are particularly suitable for stand-alone applications. R.T.A. experience, together with a careful ...
... GAC drives are realized in 250 x 100 x 56 mm format and are equipped with built-in power supply, screw-type terminals and brackets for mounting simplicity inside electrical cabinets. Due to this, they are particularly suitable for stand-alone applications. R.T.A. experience, together with a careful ...
Understanding Motor Speed
... An important part of determining the correct replacement motor for a particular application is understanding motor speed. Every motor has magnetic poles, just like a permanent magnet. These poles are created by bundles of magnet wire wound together in the slots of the stationary part of the motor (t ...
... An important part of determining the correct replacement motor for a particular application is understanding motor speed. Every motor has magnetic poles, just like a permanent magnet. These poles are created by bundles of magnet wire wound together in the slots of the stationary part of the motor (t ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... speed ranges, and rugged construction. Also, torque delivered to motor size is higher, making it useful in application where space and weight are critical factors. With these advantages BLDC motors find wide spread application in automotive appliance, aerospace medical, and instrumentation and autom ...
... speed ranges, and rugged construction. Also, torque delivered to motor size is higher, making it useful in application where space and weight are critical factors. With these advantages BLDC motors find wide spread application in automotive appliance, aerospace medical, and instrumentation and autom ...
STRMH International Future Energy Challenge ‘07
... the requirements dictated by IFEC. If this occurs a permanent magnet rotor will be designed and used in place of the squirrel cage rotor in order to increase torque and efficiency This is beyond the scope of capstone Will be able to run each characteristic for testing using user interface to s ...
... the requirements dictated by IFEC. If this occurs a permanent magnet rotor will be designed and used in place of the squirrel cage rotor in order to increase torque and efficiency This is beyond the scope of capstone Will be able to run each characteristic for testing using user interface to s ...
Induction motor
An induction or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor therefore does not require mechanical commutation, separate-excitation or self-excitation for all or part of the energy transferred from stator to rotor, as in universal, DC and large synchronous motors. An induction motor's rotor can be either wound type or squirrel-cage type.Three-phase squirrel-cage induction motors are widely used in industrial drives because they are rugged, reliable and economical. Single-phase induction motors are used extensively for smaller loads, such as household appliances like fans. Although traditionally used in fixed-speed service, induction motors are increasingly being used with variable-frequency drives (VFDs) in variable-speed service. VFDs offer especially important energy savings opportunities for existing and prospective induction motors in variable-torque centrifugal fan, pump and compressor load applications. Squirrel cage induction motors are very widely used in both fixed-speed and variable-frequency drive (VFD) applications. Variable voltage and variable frequency drives are also used in variable-speed service.