v. effect of different kinds of inter-turn winding faults on magnetic flux
... the invariability. Really, the magnetic axis should locate where each fundamental component obtains the maximum value [7]. References [7], [9] and [10] present a winding partitioning technique for solving the internal fault problem in sinusoidal wound machines. Such windings are scarcely found in el ...
... the invariability. Really, the magnetic axis should locate where each fundamental component obtains the maximum value [7]. References [7], [9] and [10] present a winding partitioning technique for solving the internal fault problem in sinusoidal wound machines. Such windings are scarcely found in el ...
Pdf - Text of NPTEL IIT Video Lectures
... You will see that the torque is not a smooth variable. It is basically a function of time. It axis like this, and finally, if you have no load condition it settle down to T e equal to 0. If you are assume that T L equal to 0 assume the machine is being started from the torque condition without any l ...
... You will see that the torque is not a smooth variable. It is basically a function of time. It axis like this, and finally, if you have no load condition it settle down to T e equal to 0. If you are assume that T L equal to 0 assume the machine is being started from the torque condition without any l ...
AN3476, Washing Machine Three-Phase AC
... longer used for new machines and is found in the least expensive washer models only. Most washers have universal brushed motors with Triode Alternating Current switch (TRIAC) control. However, with the advent of new electronic devices, these drives are becoming out-of-date. A new generation of washi ...
... longer used for new machines and is found in the least expensive washer models only. Most washers have universal brushed motors with Triode Alternating Current switch (TRIAC) control. However, with the advent of new electronic devices, these drives are becoming out-of-date. A new generation of washi ...
Date: - ibookfi.com
... Part-winding start motors contain two separate windings (2/3:1/3) which are internally connected in star and operated in parallel. One cannot change the voltage by changing the electrical connections as the motor is only suitable for one voltage range (see Table 1). The first part winding (2/3) on t ...
... Part-winding start motors contain two separate windings (2/3:1/3) which are internally connected in star and operated in parallel. One cannot change the voltage by changing the electrical connections as the motor is only suitable for one voltage range (see Table 1). The first part winding (2/3) on t ...
GO Switch Training Agenda - Air
... • Mechanical: Lever arm linked to the switch mechanism • Solid State: Electrically created magnetic field measures change in magnetic field to trip switch • Reed: Glass encapsulated switch mechanism tripped by a magnetic target • GO is a hybrid technology that combines the advantages of each of the ...
... • Mechanical: Lever arm linked to the switch mechanism • Solid State: Electrically created magnetic field measures change in magnetic field to trip switch • Reed: Glass encapsulated switch mechanism tripped by a magnetic target • GO is a hybrid technology that combines the advantages of each of the ...
motors for copeland™ semi-hermetic compressors
... Part-winding start motors contain two separate windings (2/3:1/3) which are internally connected in star and operated in parallel. One cannot change the voltage by changing the electrical connections as the motor is only suitable for one voltage range (see Table 1). The first part winding (2/3) on t ...
... Part-winding start motors contain two separate windings (2/3:1/3) which are internally connected in star and operated in parallel. One cannot change the voltage by changing the electrical connections as the motor is only suitable for one voltage range (see Table 1). The first part winding (2/3) on t ...
Harmonic Analysis of A DFIG for Wind Energy Conversion System
... Hz, while in a DFIG with quasi-sine rotor injection, the harmonics in stator currents and electromagnetic torque are dependent on the injected frequencies. The constant or steady torques are developed by the reaction of harmonic air gap fluxes with harmonic rotor mmfs, or currents, of the same order ...
... Hz, while in a DFIG with quasi-sine rotor injection, the harmonics in stator currents and electromagnetic torque are dependent on the injected frequencies. The constant or steady torques are developed by the reaction of harmonic air gap fluxes with harmonic rotor mmfs, or currents, of the same order ...
Analytical Calculation of Magnetic Field Distribution and Stator Iron
... for a significant component of the total loss in PM machines [5–7]. Optimum design of PM machines therefore requires good means for predicting these iron losses [8]. During recent years, the problem of the stator iron losses in synchronous machines has been deeply analyzed [9–13]. However, most of t ...
... for a significant component of the total loss in PM machines [5–7]. Optimum design of PM machines therefore requires good means for predicting these iron losses [8]. During recent years, the problem of the stator iron losses in synchronous machines has been deeply analyzed [9–13]. However, most of t ...
Motor torque, load torque and selection of motors
... Refer to Figure 2.1 where Tst = starting torque or breakaway torque. Tm = minimum, pull-in or pull-up torque. Tpo = pull-out, breakdown or maximum torque, obtainable over the entire speed range. In a good design this should occur as close to the rated slip as possible to ensure that the motor runs s ...
... Refer to Figure 2.1 where Tst = starting torque or breakaway torque. Tm = minimum, pull-in or pull-up torque. Tpo = pull-out, breakdown or maximum torque, obtainable over the entire speed range. In a good design this should occur as close to the rated slip as possible to ensure that the motor runs s ...
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.