ABSTRACT transmission line aspects of windings yields attenuation and
... shows the initial pulse attenuation results from 3 different stator windings. There are large variations from machine to machine, depending on the stator design. Note from Figure 6 that the oscillations after the initial peak are not as attenuated, since they are at lower frequencies. ...
... shows the initial pulse attenuation results from 3 different stator windings. There are large variations from machine to machine, depending on the stator design. Note from Figure 6 that the oscillations after the initial peak are not as attenuated, since they are at lower frequencies. ...
Fast Flashover Identification Methodology on Brushed DC
... maintenance, a brush sparking can appear if interpole coils are connected reversely. This paper presents a method for easy identification of this connection error and presents some steps to support polarization, particularly when the machine has not a terminal identification. The load testing could ...
... maintenance, a brush sparking can appear if interpole coils are connected reversely. This paper presents a method for easy identification of this connection error and presents some steps to support polarization, particularly when the machine has not a terminal identification. The load testing could ...
III Sem
... connections and groups, choice of connections, open delta connection, Scott connection, three phase to two phase conversion and vice-versa, Applications, Parallel operation and its conditions Polyphase Transformer: Construction,Various connections and groups, choice of connections, open delta connec ...
... connections and groups, choice of connections, open delta connection, Scott connection, three phase to two phase conversion and vice-versa, Applications, Parallel operation and its conditions Polyphase Transformer: Construction,Various connections and groups, choice of connections, open delta connec ...
Generic Service Preso
... Without 24VAC from the low voltage transformer present at pin 12 of the ECM, the motor will not respond correctly to most of the control functions; specifically, “O”, “Y1”, “Y/Y2”. It is important that in all systems depending on these inputs that “R” be connected to pin 12 of the ECM. The “Analyzer ...
... Without 24VAC from the low voltage transformer present at pin 12 of the ECM, the motor will not respond correctly to most of the control functions; specifically, “O”, “Y1”, “Y/Y2”. It is important that in all systems depending on these inputs that “R” be connected to pin 12 of the ECM. The “Analyzer ...
power loss ride-through in a variable speed drive system
... The influence on the torque and current of a short power loss (100ms on a 2 MW induction motor) was simulated. Figure 2 and 3 show the results at the interfaces. Even if the speed just drops a few percent the mechanical and electrical stress can be tremendous. Depending on the system this is not acc ...
... The influence on the torque and current of a short power loss (100ms on a 2 MW induction motor) was simulated. Figure 2 and 3 show the results at the interfaces. Even if the speed just drops a few percent the mechanical and electrical stress can be tremendous. Depending on the system this is not acc ...
ppt
... drive the direction of the robot and PWM will be used to control the speed of the motors • Drive motors will be connected and powered through the Hbridge • The power supply to the drive motors will be regulated by the LT 1374-5 converter • The H-bridge’s power will be regulated by the LT 1376-5 conv ...
... drive the direction of the robot and PWM will be used to control the speed of the motors • Drive motors will be connected and powered through the Hbridge • The power supply to the drive motors will be regulated by the LT 1374-5 converter • The H-bridge’s power will be regulated by the LT 1376-5 conv ...
Some problems with connecting renewable energy sources to the grid
... applied to synchronverters. Synchronverters can also be operated as synchronous motors based on the same mathematical derivation. One option is to decide the direction of the energy flow between the DC bus and the AC bus in a synchronverter automatically according to the grid frequency. We think tha ...
... applied to synchronverters. Synchronverters can also be operated as synchronous motors based on the same mathematical derivation. One option is to decide the direction of the energy flow between the DC bus and the AC bus in a synchronverter automatically according to the grid frequency. We think tha ...
Electricity Training Course
... Describe the effects that electrostatic discharge (ESD) can have on electronic components. List the precautions that you should take to prevent ESD damage when servicing electronic components. Demonstrate logical troubleshooting procedures when diagnosing printed circuit (PC) boards. Lesson 12 ...
... Describe the effects that electrostatic discharge (ESD) can have on electronic components. List the precautions that you should take to prevent ESD damage when servicing electronic components. Demonstrate logical troubleshooting procedures when diagnosing printed circuit (PC) boards. Lesson 12 ...
Magnetic Fields - Review
... The use of many coils, each in a different plane, results in a more uniform torque being produced. The invention of the commutator was important for the development of electric motors, since it is the device that allows the current in the coil to be reversed every 180° so that the torque is always i ...
... The use of many coils, each in a different plane, results in a more uniform torque being produced. The invention of the commutator was important for the development of electric motors, since it is the device that allows the current in the coil to be reversed every 180° so that the torque is always i ...
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.