UCI224G
... semiconductors of the AVR ensure positive build-up from initial low levels of residual voltage. The exciter rotor output is fed to the main rotor through a three phase full wave bridge rectifier. This rectifier is protected by a surge suppressor against surges caused, for example, by short circuit. ...
... semiconductors of the AVR ensure positive build-up from initial low levels of residual voltage. The exciter rotor output is fed to the main rotor through a three phase full wave bridge rectifier. This rectifier is protected by a surge suppressor against surges caused, for example, by short circuit. ...
Simulation and Speed Control of 3-Phase Induction Motor
... motors do not inherently have the capability of variable speed operation. Due to this reason, earlier dc motors were applied in most of the electrical drives. But the recent developments in speed control methods of the induction motor have led to their large scale use in almost all electrical drives ...
... motors do not inherently have the capability of variable speed operation. Due to this reason, earlier dc motors were applied in most of the electrical drives. But the recent developments in speed control methods of the induction motor have led to their large scale use in almost all electrical drives ...
EE 742 Chap. 5: Electromechanical Dynamics
... • We consider AVR with large time constant. In here, the transient characteristics is the same as the unregulated system except, – the value of Eq’ is higher (hence higher amplitude of PE’(δ’)) since the increased loading in the regulated system causes an increase in the steady-state field current. ...
... • We consider AVR with large time constant. In here, the transient characteristics is the same as the unregulated system except, – the value of Eq’ is higher (hence higher amplitude of PE’(δ’)) since the increased loading in the regulated system causes an increase in the steady-state field current. ...
câteva elemente de design ingineresc
... one of the most commonly used motors for driving machines and mechanisms. Their simple construction, reliability in operation, low cost and high efficiency are reasons to assume that this type of motors will remain one of the most used sources of mechanical energy during the entire twenty-first cent ...
... one of the most commonly used motors for driving machines and mechanisms. Their simple construction, reliability in operation, low cost and high efficiency are reasons to assume that this type of motors will remain one of the most used sources of mechanical energy during the entire twenty-first cent ...
Matching servomotors and amplifiers
... torque of the motor to 42% of its capability. Moreover, the peak torque capability of the motor is limited to 27% of its capacity. Commutation limits Brush-type motors are limited by the watts that can be switched (commutated). Each such motor has a commutation curve that indicates the speed and loa ...
... torque of the motor to 42% of its capability. Moreover, the peak torque capability of the motor is limited to 27% of its capacity. Commutation limits Brush-type motors are limited by the watts that can be switched (commutated). Each such motor has a commutation curve that indicates the speed and loa ...
White paper on Soft Starter used with Slip ring motors
... 2. Soft Starters are suitable for replacing resistance and electrolytic starters where these have been used for reduced current starting with reduced torque. 3. The normal solution when using a Soft Starter on a slip ring motor is to have 1 stage of resistance that is in circuit during the soft star ...
... 2. Soft Starters are suitable for replacing resistance and electrolytic starters where these have been used for reduced current starting with reduced torque. 3. The normal solution when using a Soft Starter on a slip ring motor is to have 1 stage of resistance that is in circuit during the soft star ...
Linear electric generator
... constant frequency applications, such as wind turbines or other renewable energy technologies. The full output performance of any generator can be optimized with electronic control but only the doubly fed generators or thebrushless wound-rotor doubly fed generator incorporate electronic control with ...
... constant frequency applications, such as wind turbines or other renewable energy technologies. The full output performance of any generator can be optimized with electronic control but only the doubly fed generators or thebrushless wound-rotor doubly fed generator incorporate electronic control with ...
Technical information VDE 0530
... An exact definition of the types of operation is necessary in order to ensure that limit temperatures listed in 1 are not exceeded. For this the steady-state temperature and the final state temperature is defined in such a way that the excess temperature ∆ϑ during one hour of operation may change by ...
... An exact definition of the types of operation is necessary in order to ensure that limit temperatures listed in 1 are not exceeded. For this the steady-state temperature and the final state temperature is defined in such a way that the excess temperature ∆ϑ during one hour of operation may change by ...
Full-text
... prepacking, dye mixing, polishing machine tools, etc. In these devices rotary movement of the electric motor will be transformed in oscillatory by means of various cinematic parts. The task for reduction of metal consumption, weight and size parameters, simplification of operating system is to searc ...
... prepacking, dye mixing, polishing machine tools, etc. In these devices rotary movement of the electric motor will be transformed in oscillatory by means of various cinematic parts. The task for reduction of metal consumption, weight and size parameters, simplification of operating system is to searc ...
MN2321202125
... motor, the polarity reversal is performed by semiconductor switches which are to be switched in synchronization with the rotor position. Besides the higher reliability, the missing commutator brings another advantage. The commutator is also a limiting factor in the maximal speed of the DC motor. The ...
... motor, the polarity reversal is performed by semiconductor switches which are to be switched in synchronization with the rotor position. Besides the higher reliability, the missing commutator brings another advantage. The commutator is also a limiting factor in the maximal speed of the DC motor. The ...
experiment 6 - Portal UniMAP
... A single-phase induction motor has no intrinsic starting torque. There are three techniques commonly used to start these motors, and single-phase induction motors are classified according to the methods used to produce their starting torque. The three major starting techniques are split phase motor, ...
... A single-phase induction motor has no intrinsic starting torque. There are three techniques commonly used to start these motors, and single-phase induction motors are classified according to the methods used to produce their starting torque. The three major starting techniques are split phase motor, ...
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.