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General - Sicme Motori
... catalogues refer to use as variable speed motors connected to three-phase, fully-controlled bridge (6 or 12 thyristors) or, for frames 80-112 only, to single-phase bridge also. The performance ratings concerning use as generator will be given upon request. A.08 ...
... catalogues refer to use as variable speed motors connected to three-phase, fully-controlled bridge (6 or 12 thyristors) or, for frames 80-112 only, to single-phase bridge also. The performance ratings concerning use as generator will be given upon request. A.08 ...
Online Off-Site Condition Monitoring Of Three Phase
... comprehension of the influence of each variable is desired Various signal processing techniques are applied to these for the correct interpretation of the data acquired. sensor signals to extract particular fault. fig 1 shows block In this work the frequency spectrum is obtained using diagram of gen ...
... comprehension of the influence of each variable is desired Various signal processing techniques are applied to these for the correct interpretation of the data acquired. sensor signals to extract particular fault. fig 1 shows block In this work the frequency spectrum is obtained using diagram of gen ...
design and electromagnetic field simulation of disk stepper motor
... magnets is being subject of the article, too. Disc rotor type permanent magnet stepper motor for high torque to inertia ratio is ideal for robotics and CNC machines. ...
... magnets is being subject of the article, too. Disc rotor type permanent magnet stepper motor for high torque to inertia ratio is ideal for robotics and CNC machines. ...
experiment 3 title: separately-excited dc generators
... shown in Figure 4. It is the same as that for the dc motor, except that the direction of current flow is reversed and voltage ECEMF becomes EEMF which is the voltage induced across the armature winding as it rotates in the magnetic flux produced by the stator electromagnet. When no load is connect t ...
... shown in Figure 4. It is the same as that for the dc motor, except that the direction of current flow is reversed and voltage ECEMF becomes EEMF which is the voltage induced across the armature winding as it rotates in the magnetic flux produced by the stator electromagnet. When no load is connect t ...
AO26255260
... determined by the pole pair number and the stator supply frequency. The two names for the same type of motor, induction motor and asynchronous motor, describe the two characteristics in which this type of motor differs from DC motors and synchronous motors. Induction refers to the fact that the fiel ...
... determined by the pole pair number and the stator supply frequency. The two names for the same type of motor, induction motor and asynchronous motor, describe the two characteristics in which this type of motor differs from DC motors and synchronous motors. Induction refers to the fact that the fiel ...
Electric Motors for Machines and Mechanisms - Fab Central
... provide a rotating torque without the aide of brushes, slip rings, or other devices carrying current into the inner rotating member 2) The induction motor relies upon transformer action between the primary outer armature member and the inner secondary rotating member 3) The inner secondary transform ...
... provide a rotating torque without the aide of brushes, slip rings, or other devices carrying current into the inner rotating member 2) The induction motor relies upon transformer action between the primary outer armature member and the inner secondary rotating member 3) The inner secondary transform ...
37. Kanuch_Visnyi
... Abstract: This document deals with electromagnetic compatibility (EMC) of universal motor operating at AC and DC power supply. Universal motors are used in a variety of applications and can be operated either at AC or DC supply current. The advantages of universal motors are especially high starting ...
... Abstract: This document deals with electromagnetic compatibility (EMC) of universal motor operating at AC and DC power supply. Universal motors are used in a variety of applications and can be operated either at AC or DC supply current. The advantages of universal motors are especially high starting ...
Motor Start Theory
... Motors consist of two major sections – The Stator and the Rotor The stator consists of magnetic poles and stator windings within the frame of the motor.By variation of winding configuration and the contour of the stator laminations , the full load characteristics are determined The motor speed is de ...
... Motors consist of two major sections – The Stator and the Rotor The stator consists of magnetic poles and stator windings within the frame of the motor.By variation of winding configuration and the contour of the stator laminations , the full load characteristics are determined The motor speed is de ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676
... have concluded that Switched Reluctance motor (SRM) has proved to be a valid alternative to the classical motors in many industrial applications. The magnetization characteristics of SRM is highly non-linear [1] owing to the fact that the working zone of SRG is a highly saturated magnetic circuit wh ...
... have concluded that Switched Reluctance motor (SRM) has proved to be a valid alternative to the classical motors in many industrial applications. The magnetization characteristics of SRM is highly non-linear [1] owing to the fact that the working zone of SRG is a highly saturated magnetic circuit wh ...
The New Pentagon Bipolar Driver for 0.36°/0.72° Stepping Motors
... Oriental Motor offers several different New Pentagon bipolar driver options. Which driver option you may choose is determined by several factors In general, a method for selecting what driver to use would use the following thought process: 1. What input voltage is available? Drivers are available th ...
... Oriental Motor offers several different New Pentagon bipolar driver options. Which driver option you may choose is determined by several factors In general, a method for selecting what driver to use would use the following thought process: 1. What input voltage is available? Drivers are available th ...
Direct-Driven Interior Magnet Permanent Magnet Synchronous
... actual space available in the car chassis. The maximum active length of the PMSM including the end windings was 200 mm and the maximum stator external diameter was 380 mm. The average torque and rotation speed were adopted from a drive cycle of specified sports car track data. According to the suppl ...
... actual space available in the car chassis. The maximum active length of the PMSM including the end windings was 200 mm and the maximum stator external diameter was 380 mm. The average torque and rotation speed were adopted from a drive cycle of specified sports car track data. According to the suppl ...
Separately Excited DC Generators
... shown in Figure 4. It is the same as that for the dc motor, except that the direction of current flow is reversed and voltage ECEMF becomes EEMF which is the voltage induced across the armature winding as it rotates in the magnetic flux produced by the stator electromagnet. When no load is connect t ...
... shown in Figure 4. It is the same as that for the dc motor, except that the direction of current flow is reversed and voltage ECEMF becomes EEMF which is the voltage induced across the armature winding as it rotates in the magnetic flux produced by the stator electromagnet. When no load is connect t ...
I. Introduction
... Abstract–Due to saturation impact in iron and thermal changes of stator and rotor windings induction motor (IM) is especially non-linear system. This non-linear system control can be solved by using theory of adaptive control with observer theory application. In this paper is analyzed IM sensorless ...
... Abstract–Due to saturation impact in iron and thermal changes of stator and rotor windings induction motor (IM) is especially non-linear system. This non-linear system control can be solved by using theory of adaptive control with observer theory application. In this paper is analyzed IM sensorless ...
transformer protection
... time delay adjustment. But overheating not only depends on over-current but also the failure of the cooling system in the generator. So temperature detector coils such as thermistors or thermocouples are used at various points in stator winding for indication of the temperature. ...
... time delay adjustment. But overheating not only depends on over-current but also the failure of the cooling system in the generator. So temperature detector coils such as thermistors or thermocouples are used at various points in stator winding for indication of the temperature. ...
A Study of De-Excitation after Abrupt 3
... ---the less time short circuit sustained, the larger magnetic energy absorbed. ---value of d-axis mutual inductance Lad’ of loading generator is in saturation area ,and can be determined by simulation. The saturation can be ignored when 3-phase short circuit happens. Obviously armature reaction in t ...
... ---the less time short circuit sustained, the larger magnetic energy absorbed. ---value of d-axis mutual inductance Lad’ of loading generator is in saturation area ,and can be determined by simulation. The saturation can be ignored when 3-phase short circuit happens. Obviously armature reaction in t ...
Improving the Starting Performance of Large Salient-Pole Synchronous Machines
... The three-dimensional effects were included in the coupled field-circuit formulation by using end-leakage reactances and the end winding resistances as external circuit parameters. The model of Fig. 6 has 29 574 elements and 15 279 nodes. The selection of mesh density is a tradeoff between the desir ...
... The three-dimensional effects were included in the coupled field-circuit formulation by using end-leakage reactances and the end winding resistances as external circuit parameters. The model of Fig. 6 has 29 574 elements and 15 279 nodes. The selection of mesh density is a tradeoff between the desir ...
A new surface-inset, permanent-magnet, brushless DC motor drive
... brushless dc motor drives). To extend the constant power speed range of these PM brushless motor drives, flux-weakening control has been developed in recent years. It is essentially a current vector control based on - -coordinate transformation [2]–[7]. When they operate above the base speed, the -a ...
... brushless dc motor drives). To extend the constant power speed range of these PM brushless motor drives, flux-weakening control has been developed in recent years. It is essentially a current vector control based on - -coordinate transformation [2]–[7]. When they operate above the base speed, the -a ...
Axial-Flux PM Wind Generator with a Soft Magnetic Composite Core
... the design procedure is programmed, which can be used to design PM wind generators of different topologies. For the convenience of discussing design considerations and comparisons, Table 1 gives the design results of wind generators for four different structures, which are the double rotor axial-flu ...
... the design procedure is programmed, which can be used to design PM wind generators of different topologies. For the convenience of discussing design considerations and comparisons, Table 1 gives the design results of wind generators for four different structures, which are the double rotor axial-flu ...
Commutator (electric)
![](https://commons.wikimedia.org/wiki/Special:FilePath/Universal_motor_commutator.jpg?width=300)
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.