Unit -5 - WordPress.com
... Constant losses are those losses which are considered to remain constant over normal working range of induction motor. The fixed losses can be easily obtained by performing no-load test on the three phase induction motor. These losses are further classified as Iron or core losses, Mechanical losses ...
... Constant losses are those losses which are considered to remain constant over normal working range of induction motor. The fixed losses can be easily obtained by performing no-load test on the three phase induction motor. These losses are further classified as Iron or core losses, Mechanical losses ...
Induction Machine Speed Control
... excessive heat build up inside the speed control unit housing. They would like to increase the maximum allowed current of the speed control unit up to sixteen amperes thereby making it possible to sell their products to a wider range of customers with different needs for example control of pumps and ...
... excessive heat build up inside the speed control unit housing. They would like to increase the maximum allowed current of the speed control unit up to sixteen amperes thereby making it possible to sell their products to a wider range of customers with different needs for example control of pumps and ...
Slides on Steady-state basics
... Note: Analytic treatment of torque production is done using the coupling field approach. We will treat this a little later. ...
... Note: Analytic treatment of torque production is done using the coupling field approach. We will treat this a little later. ...
Calculation Of No-load Induction Motor Core Losses Using The Rate
... The waveforms of measured and calculated stator phase currents and stator tooth flux are shown in Fig. 4 (for sake of brevity and clarity, the different waveforms have been phase shifted with respect to each other, as is also the case in Fig. 7). The “measured” iron losses are obtained by measuring ...
... The waveforms of measured and calculated stator phase currents and stator tooth flux are shown in Fig. 4 (for sake of brevity and clarity, the different waveforms have been phase shifted with respect to each other, as is also the case in Fig. 7). The “measured” iron losses are obtained by measuring ...
2012S
... b) The power input to a 3 phase, 6-pole, 440V, 50 Hz induction motor is 80 kW. The rotor e.m.f is observed to make 100 complete revolutions per minute. Calculate i) slip ii) rotor speed iii) mechanical power developed iv) rotor copper losses per phase v) rotor resistance per phase if the rotor curre ...
... b) The power input to a 3 phase, 6-pole, 440V, 50 Hz induction motor is 80 kW. The rotor e.m.f is observed to make 100 complete revolutions per minute. Calculate i) slip ii) rotor speed iii) mechanical power developed iv) rotor copper losses per phase v) rotor resistance per phase if the rotor curre ...
Formating rules
... [email protected] , [email protected], [email protected] , [email protected] Abstract- The results of effect of induction motor undamped field on transient electromagnetic torques in motor switching regime research are presented in these investigations. ...
... [email protected] , [email protected], [email protected] , [email protected] Abstract- The results of effect of induction motor undamped field on transient electromagnetic torques in motor switching regime research are presented in these investigations. ...
article: linear induction motor
... turn around part of the pole. The current induced in this turn lags behind the supply current, creating a delayed magnetic field around the shaded part of the pole face. This imparts sufficient rotational field energy to start the motor. These motors are typically used in applications such as desk f ...
... turn around part of the pole. The current induced in this turn lags behind the supply current, creating a delayed magnetic field around the shaded part of the pole face. This imparts sufficient rotational field energy to start the motor. These motors are typically used in applications such as desk f ...
the employment of a single-phase capacitor induction motor for
... works deal with three-phase SEIG, while a two-winding, single-phase induction machine may also be successfully utilized [1, 2, 5]. The single-phase induction machine may operate as a self-excited induction generator, when its main and auxiliary windings are electrically se parated and an excitation ...
... works deal with three-phase SEIG, while a two-winding, single-phase induction machine may also be successfully utilized [1, 2, 5]. The single-phase induction machine may operate as a self-excited induction generator, when its main and auxiliary windings are electrically se parated and an excitation ...
Induction cooking
Induction cooking heats a cooking vessel by magnetic induction, instead of by thermal conduction from a flame, or an electrical heating element. Because inductive heating directly heats the vessel, very rapid increases in temperature can be achieved.In an induction cooker, a coil of copper wire is placed under the cooking pot and an alternating electric current is passed through it. The resulting oscillating magnetic field induces a magnetic flux which repeatedly magnetises the pot, treating it like a lossy magnetic core of a transformer. This produces large eddy currents in the pot, which because of the resistance of the pot, heats it.For nearly all models of induction cooktops, a cooking vessel must be made of, or contain, a ferromagnetic metal such as cast iron or some stainless steels. However, copper, glass, non magnetic stainless steels, and aluminum vessels can be placed on a ferromagnetic interface disk which functions as a conventional hotplate.