Development of Brush Lifting Gear for Slip Ring Motor

Mohd Khairy, Abd Mutalib (2012) Development of Brush Lifting Gear for Slip Ring Motor. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Wound rotor motor or slip ring was one induction machines where rotor containing one set coils that are terminated in slip ring where external resistance can be connected. The purpose of this project is to develop brush lifting gear for slip ring of wound rotor motor and understand the problem pertaining carbon brush and slip ring. Wound rotor motor has the rotor windings connected to an external resistance through carbon brushes and slip rings assembly. When the brushes are in continuous contact with the slip rings during normal operation of the motor, the brushes and the slip rings will experience premature wearing. Once the motor reaches the normal operation speed, there is no need to have the external resistance in the circuit and the brushes to slip rings contact can be ceased. The development for this project is to lift up the carbon brushes immediately after the motor has reached to its steady state speed. As the result it will minimize the amount of wear and tear of the slip ring and hence will avoid instability on the running current

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