Lab 5
... make the measurements. Repeat the above measurements of drive voltage and current for each step the motor takes. Make a table like that shown in Table 2. to record your data. b) Sketch the winding drive voltages 1a , 1b , 2 a and 2 b as a function of step index, producing a graph resembling Fi ...
... make the measurements. Repeat the above measurements of drive voltage and current for each step the motor takes. Make a table like that shown in Table 2. to record your data. b) Sketch the winding drive voltages 1a , 1b , 2 a and 2 b as a function of step index, producing a graph resembling Fi ...
speed control of motor
... i) The field coils of dc series motor are wound with relatively fewer turns as the current through the field is its armature current and hence for required mmf less numbers of turns are required. ii) The wire is heavier, as the diameter is considerable increased to provide minimum electrical resista ...
... i) The field coils of dc series motor are wound with relatively fewer turns as the current through the field is its armature current and hence for required mmf less numbers of turns are required. ii) The wire is heavier, as the diameter is considerable increased to provide minimum electrical resista ...
Technical Teaching Equipment
... ESL-SOF is the application addressed to the Students that helps them to understand theoretical concepts by means of practical exercises and to prove their knowledge and progression by performing tests and calculations in addition to Multimedia Resources. Default planned tasks and an Open workgroup a ...
... ESL-SOF is the application addressed to the Students that helps them to understand theoretical concepts by means of practical exercises and to prove their knowledge and progression by performing tests and calculations in addition to Multimedia Resources. Default planned tasks and an Open workgroup a ...
Generator Assembly Instructions
... Adding a simple generator to your motor is the best way to demonstrate how electrical energy is converted to mechanical energy, and then back to electrical power. It is also a helpful tool to measure and calculate torque and efficiency of your motor. We use high precision industrial motors with prec ...
... Adding a simple generator to your motor is the best way to demonstrate how electrical energy is converted to mechanical energy, and then back to electrical power. It is also a helpful tool to measure and calculate torque and efficiency of your motor. We use high precision industrial motors with prec ...
Unit_4_DEA
... The squirrel cage motor has the following advantages as compared with wound rotor machine: i. No slip rings, brush gear, short circuiting devices, rotor terminals for starting rheostats are required. The Y-Δ starter is sufficient for starting. ii. It has a slightly higher efficiency. iii. It is chea ...
... The squirrel cage motor has the following advantages as compared with wound rotor machine: i. No slip rings, brush gear, short circuiting devices, rotor terminals for starting rheostats are required. The Y-Δ starter is sufficient for starting. ii. It has a slightly higher efficiency. iii. It is chea ...
Types of D.C. Generators Separately Excited D.C. Generators Self
... In a shunt generator, the field winding is connected in parallel with the armature winding so that terminal voltage of the generator is applied across it. The shunt field winding has many turns of fine wire having high resistance. Therefore, only a part of armature current flows through shunt field ...
... In a shunt generator, the field winding is connected in parallel with the armature winding so that terminal voltage of the generator is applied across it. The shunt field winding has many turns of fine wire having high resistance. Therefore, only a part of armature current flows through shunt field ...
IES PE Short Course
... Fact: Salient pole rotors are cheaper to build than smooth. Do hydro-turbine generators have salient poles or smooth? ...
... Fact: Salient pole rotors are cheaper to build than smooth. Do hydro-turbine generators have salient poles or smooth? ...
edc-module_iib-three_phase_im
... Robust; No brushes. No contacts on rotor shaft High Power/Weight ratio compared to DC motor Lower Cost/Power Easy to manufacture Almost maintenance-free, except for bearing and other mechanical parts • wide range of power ratings: fractional HP to 10 MW ...
... Robust; No brushes. No contacts on rotor shaft High Power/Weight ratio compared to DC motor Lower Cost/Power Easy to manufacture Almost maintenance-free, except for bearing and other mechanical parts • wide range of power ratings: fractional HP to 10 MW ...
Special Machines EM-III
... Torque is produced when, rotor pole to aline with stator pole to maximize the stator flux linkages when winding of stator pole is excited by converter circuit. ...
... Torque is produced when, rotor pole to aline with stator pole to maximize the stator flux linkages when winding of stator pole is excited by converter circuit. ...
design of high speed switched reluctance motors
... analysis is complete in itself [3,6]. It generates the geometry and winding designs and selects the material properties including the magnetization curve before the magnetic equivalent circuit calculation an electrical simulation are run [6]. The designed SRM has a flat efficiency versus speed curve ...
... analysis is complete in itself [3,6]. It generates the geometry and winding designs and selects the material properties including the magnetization curve before the magnetic equivalent circuit calculation an electrical simulation are run [6]. The designed SRM has a flat efficiency versus speed curve ...
Synchronous Generator is a doubly excited machine
... and if any one transformer becomes fault or disabled, the whole group might become disabled. Nevertheless, the star connected three phase transformer is especially convenient and economical in electrical power distributing systems, in that a fourth wire may be connected as a neutral point, 4, Three- ...
... and if any one transformer becomes fault or disabled, the whole group might become disabled. Nevertheless, the star connected three phase transformer is especially convenient and economical in electrical power distributing systems, in that a fourth wire may be connected as a neutral point, 4, Three- ...
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.