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Tags: Brushless, Servomotor,
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Brushless Servomotor
Post: #1

A Brushless Servomotor has been developed by using interdisciplinary mechatronics engineering. A mechanical switching device (commutator) is replaced by electronic circuits and controllers resulting in maintenance free and high performance servo drive. The brushless servomotor is an ac motor, in all respects and is in fact called the ac servomotor. Combined with a dedicated control device, the performance of the brushless servomotor is found to be equal to the performance of the high performance dc servo motor. In dc motor when the current flows in the electrical conductor, after passing through the brushes and the commutator in the magnetic field generated by permanent magnets N and S, torque is generated. For getting a stable torque proportional to current, the line of magnetic force should intersect the direction of current at right angles in a dc motor. This is enabled by the use of rectifiers (a commutator and brushes).The brushless servomotor lacks the rectifiers that the de motor has, and has a device for making the current flow to fit the rotor position by controlling the power source. The increasing trend and need towards automated factories and sophisticated robotics would definitely make the use of servomotors more widespread..
Post: #2
plz give more about servo motor brushless
Post: #3
i want brushless please send me details srinivasarao0910[at]
Post: #4

A brush-less servo motor has permanent rotating magnets and a fixed armature, eliminating the problems of current connection to the moving frame. An electronic controller replaces the brushed DC motor brush / switch assembly, which continuously changes the phase to the windings to keep the motor spinning. The controller performs a similar timed power distribution using a solid state circuit instead of the brush / switch system.
Brush-less motors offer several advantages over brushed DC motors, including more torque per weight and efficiency, reliability, noise reduction, longer life (no brushing and erosion of the manifold), elimination of ionizing sparks from the manifold, higher power and General reduction of electromagnetic interference (EMI).
Without windings in the rotor, they do not undergo centrifugal forces, and because the windings are supported by the housing, they can be cooled by conduction, without needing air flow inside the engine for cooling. This in turn means that the engine internals can be completely closed and protected from dirt or other foreign matter.

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