| 21. | Today speed control by use of slip ring motor is mostly superseded by induction motors with variable-frequency drives.
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| 22. | A slip ring can be used in any electromechanical system that requires rotation while transmitting power or signals.
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| 23. | The other part is AC current from the slip rings which is directly rectified into DC by the commutator.
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| 24. | Also, motor generators require more routine maintenance due their nature as rotating machines, given the bearings and slip rings.
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| 25. | To reduce the electrical noise the contact points need to be pressed against the slip rings with greater force.
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| 26. | A two-phase rotor winding is connected to the incoming machine source by a phase-shifting network through brushes and slip rings.
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| 27. | In addition, where signals and power need to pass to the model, some form of slip ring arrangement is required.
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| 28. | Full free rotation would require slip rings around each gimbal axis for power conductors, further adding to the design complexity.
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| 29. | Doubly fed electric machines use the slip rings to supply external power to the rotor circuit, allowing wide-range speed control.
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| 30. | A slip ring ( in electrical engineering terms ) is a method of making an electrical connection through a rotating assembly.
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