amrita sai institute of science and technology
... 1) The output current can be led directly from fixed terminals on the stator (or armature windings) to the load circuit, without having to pass it through brush contacts. 2) It is easier to insulate stationary armature winding for high AC voltage, which may have as high a value as 30KV or more. 3) T ...
... 1) The output current can be led directly from fixed terminals on the stator (or armature windings) to the load circuit, without having to pass it through brush contacts. 2) It is easier to insulate stationary armature winding for high AC voltage, which may have as high a value as 30KV or more. 3) T ...
PNIMNiPE_nr56
... For the test purpose high torque produced is transmitted outside with help of simple “fork” type mechanical system (chosen point of rotor performs movement of hypocycloidal shape [8, 9]). In the prototype simple one key per phase drive system is adapted as shown on Fig.2. Code disc mounted on cranks ...
... For the test purpose high torque produced is transmitted outside with help of simple “fork” type mechanical system (chosen point of rotor performs movement of hypocycloidal shape [8, 9]). In the prototype simple one key per phase drive system is adapted as shown on Fig.2. Code disc mounted on cranks ...
SECME-Generator-Building-Presentation-11-22
... • No batteries, or external voltage source can be used. • No generator kits allowed • All items must be hand assembled • Generator must be able to run for continuously for 30sec. ...
... • No batteries, or external voltage source can be used. • No generator kits allowed • All items must be hand assembled • Generator must be able to run for continuously for 30sec. ...
Slides
... windings we will control the direction of current, and thus, polarity at each stator. At any given time, one set of stators (A or B) will be aligned perfectly with the rotors teeth and the other set of stators will be misaligned. By switching the current direction in winding A it causes the next pha ...
... windings we will control the direction of current, and thus, polarity at each stator. At any given time, one set of stators (A or B) will be aligned perfectly with the rotors teeth and the other set of stators will be misaligned. By switching the current direction in winding A it causes the next pha ...
Introduction - The City University of New York
... Applied Motion Products: Step/DC motors and drives, ...
... Applied Motion Products: Step/DC motors and drives, ...
Blake Lloyd - IEEE Industry Applications Society
... Early warning of developing problems in rotating machinery using shaft voltage and current monitoring with intention to protect shaft bearings from stray current and detect other related problems has been used in the industry since mid-1970’s. There has been an increase in occurrences and intensity ...
... Early warning of developing problems in rotating machinery using shaft voltage and current monitoring with intention to protect shaft bearings from stray current and detect other related problems has been used in the industry since mid-1970’s. There has been an increase in occurrences and intensity ...
[: 3.55
... passes under the set of brushes K (see Fig. 3 also) until the same group of segments passes out from under the set of brushes L. The brush sets K 10 and L, accordingly, are spaced to have the dis ...
... passes under the set of brushes K (see Fig. 3 also) until the same group of segments passes out from under the set of brushes L. The brush sets K 10 and L, accordingly, are spaced to have the dis ...
The Polyphase Induction Motor
... current. The squirrel-cage motor usually draws about seven times rated current for an instant if started at rated voltage. To reduce the effects of this on the system, a few such motors are equipped with starting compensators which allow the motors to start at about one-half rated voltage, and then, ...
... current. The squirrel-cage motor usually draws about seven times rated current for an instant if started at rated voltage. To reduce the effects of this on the system, a few such motors are equipped with starting compensators which allow the motors to start at about one-half rated voltage, and then, ...
AC circuits
... direction. If only a single loop were used in the construction of a DC generator, a pulsating one directional current would be produced. To produce a steady DC current, many loops and commutators are used. ...
... direction. If only a single loop were used in the construction of a DC generator, a pulsating one directional current would be produced. To produce a steady DC current, many loops and commutators are used. ...
Induction Motor
... • The stator is the stationary electrical part of the motor. • The stator core of a National Electrical Manufacturers Association (NEMA) motor is made up of several hundred thin laminations. • Stator laminations are stacked together forming a hollow cylinder. Coils of insulated wire are inserted int ...
... • The stator is the stationary electrical part of the motor. • The stator core of a National Electrical Manufacturers Association (NEMA) motor is made up of several hundred thin laminations. • Stator laminations are stacked together forming a hollow cylinder. Coils of insulated wire are inserted int ...
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.