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TOPIC: 291005 KNOWLEDGE: K1.01 [2.6/2.6]
... The cooling water system is being returned to service following maintenance on the pumps. Each pump is driven by an identical three-phase AC induction motor. Pump A was started five minutes ago to initiate flow in the cooling water system. Pump B is about to be started. When pump B is started, which ...
... The cooling water system is being returned to service following maintenance on the pumps. Each pump is driven by an identical three-phase AC induction motor. Pump A was started five minutes ago to initiate flow in the cooling water system. Pump B is about to be started. When pump B is started, which ...
Transformer TheoryPDF
... electromagnetic induction, or mutual induction • Principle of electromagnetic induction: • An alternating magnetic flux is produced in the magnetic core of the transformer by passing an AC current through the primary winding • The magnetic flux circulates in the magnetic core passing through the s ...
... electromagnetic induction, or mutual induction • Principle of electromagnetic induction: • An alternating magnetic flux is produced in the magnetic core of the transformer by passing an AC current through the primary winding • The magnetic flux circulates in the magnetic core passing through the s ...
Electrical Machines I
... Week 7-8: DC generators connections, characteristics and theory of operation ...
... Week 7-8: DC generators connections, characteristics and theory of operation ...
Understanding Generator Ripple Waveforms
... junction may be connected to an additional pair of diodes. Still other generators provide an external connection to the neutral junction so that the voltage may be used as a signal for the voltage regulator or other purposes. Figure 6 shows how an optional pair of diodes would be connected. ...
... junction may be connected to an additional pair of diodes. Still other generators provide an external connection to the neutral junction so that the voltage may be used as a signal for the voltage regulator or other purposes. Figure 6 shows how an optional pair of diodes would be connected. ...
Efficiency of an Electrical Machine in Electric Vehicle Application
... taken into account when trying to obtain accurate loss values from analytical calculations. In large induction machines, more than 50 % of the total stray losses can be caused by these rotor currents [16, 1]. Furthermore, the air-gap harmonics can also create circulating currents in the stator windi ...
... taken into account when trying to obtain accurate loss values from analytical calculations. In large induction machines, more than 50 % of the total stray losses can be caused by these rotor currents [16, 1]. Furthermore, the air-gap harmonics can also create circulating currents in the stator windi ...
TB67S269FTG
... shutdown (TSD) circuitry. It is advisable to keep the maximum current below a certain level so that the maximum junction temperature, Tj (MAX), will not exceed 120°C. Caution）Absolute maximum ratings The absolute maximum ratings of a semiconductor device are a set of ratings that must not be exceede ...
... shutdown (TSD) circuitry. It is advisable to keep the maximum current below a certain level so that the maximum junction temperature, Tj (MAX), will not exceed 120°C. Caution）Absolute maximum ratings The absolute maximum ratings of a semiconductor device are a set of ratings that must not be exceede ...
Rockwell Automation External LTS Template
... Copyright © 2005 Rockwell Automation, Inc. All rights reserved. ...
... Copyright © 2005 Rockwell Automation, Inc. All rights reserved. ...
EGTOGET Seminar Topics
... # As the two voltages approach each other in phase angle, (Vi+Vr) will become greater than (Vi - Vr) & vice versa. # Thus the net operating torque tends to increase as the two systems tends to be more in phase with each other. # Whether net torque is in the operating direction (T>0) or in the restra ...
... # As the two voltages approach each other in phase angle, (Vi+Vr) will become greater than (Vi - Vr) & vice versa. # Thus the net operating torque tends to increase as the two systems tends to be more in phase with each other. # Whether net torque is in the operating direction (T>0) or in the restra ...
R1300 GENERATOR SERVICE MANUAL
... is produced with which the magnetic force at the rotor’s magnetic pole is intensified. When this magnetic force is intensified, the respective voltages in themain coil and condenser coil rise up. As the current@ increases, the magnetic flux at the rotor’s magnetic pole increases further. Thus the vo ...
... is produced with which the magnetic force at the rotor’s magnetic pole is intensified. When this magnetic force is intensified, the respective voltages in themain coil and condenser coil rise up. As the current@ increases, the magnetic flux at the rotor’s magnetic pole increases further. Thus the vo ...
NEMA # ICS-14 - Hubbell Industrial Controls
... document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or seller’s products or services by virtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to rende ...
... document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or seller’s products or services by virtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to rende ...
Willow Glen Short Circuit Study
... Load characteristics • The accuracy of analytical results depends on modeling of power system components, devices, and controls. • Power system components - Generators, excitation systems, over/under excitation limiters, static VAr systems, mechanically switched capacitors, under load tap changin ...
... Load characteristics • The accuracy of analytical results depends on modeling of power system components, devices, and controls. • Power system components - Generators, excitation systems, over/under excitation limiters, static VAr systems, mechanically switched capacitors, under load tap changin ...
Thermal_Camera_Team_..
... variable). The ovals above represent the different types of systems involved in the math. From left to right the electrical source, the motor, the inertial load. The motor has its own inertia represented by Jm and also damping represented by Bm since the motor cannot produce a constant torque for al ...
... variable). The ovals above represent the different types of systems involved in the math. From left to right the electrical source, the motor, the inertial load. The motor has its own inertia represented by Jm and also damping represented by Bm since the motor cannot produce a constant torque for al ...
AC to DC Converter (Rectifier)
... load current, thyristors T1 and T2 remain in the on-state beyond the positive half-wave of the source voltage vs . For this reason, the load voltage vd can have a negative instantaneous value. value The firing of thyristors T3 and T4 has two effects: i) they turn off thyristors T1 and T2; and ii) af ...
... load current, thyristors T1 and T2 remain in the on-state beyond the positive half-wave of the source voltage vs . For this reason, the load voltage vd can have a negative instantaneous value. value The firing of thyristors T3 and T4 has two effects: i) they turn off thyristors T1 and T2; and ii) af ...
Domestic_Defrost
... greater than the resistance of the heater • For this reason almost all the voltage of this circuit is dropped across the timer motor. • The impedance of the timer motor also limits the current flow throughout the defrost heater to such an extent that it does not become warm. ...
... greater than the resistance of the heater • For this reason almost all the voltage of this circuit is dropped across the timer motor. • The impedance of the timer motor also limits the current flow throughout the defrost heater to such an extent that it does not become warm. ...
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.