Sep 10, 2019· Speed Control of Slip Ring Induction Motor. 1) By Varying External Resistance: We know that a motor uses an external high resistance circuit for producing high starting torque. The resistance of this motor depends upon the slip, and independent of the torque. So, by varying resistance after the motor has attained rated speed, the slip value can
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Get PriceSLIP RING INDUCTION MOTORS DRIVING CEMENT MILLS Table of contents Section Page 1 Abstract 3 2 Introduction 3 3. Ball mill and motor 3 3.1 Ball mill load characteristics 3.2 Motor torque defined 3.3 Differentiating characteristics 3.4 Synchronous motor 3.5 Slip ring induction motor
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Get PriceJan 20, 2012· Hi, I would like to know characteristics of slip ring motor upon speed Vs Load. I have a case that slip ring bow truster motor is getting high current by 25% (125%) than rated at both stator and rotor winding. I did check all the source and resistance. the current and voltage for both...
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Get PriceAC motor / with slip ring-wound rotor / squirrel cage / multipolar 750 Slip ring motors or also called wound rotor motors are the heart in a lot of gypsum in diverse technologies of crushers, roller presses and mills but also technological process or the upstream mains limit the
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Get PriceIn case of polyphase slip-ring induction motor the speed is controlled by rotor resistance and involves copper loss (I 2 R loss). 4. Lathes, Milling and Grinding Machines: Owing to large ratings (above 3,000 kW) required for the raw and cement mill drives and due to the limitations in the availability of large size gearboxes and motors
Get PriceCARBON BRUSH pRESSURE ON A SlIp RING OR COMMUTATOR At any given machine speed, the spring pressure must be sufficient such that proper contact between the carbon brush and the slip ring / commutator is maintained. (See Technical Data Sheet TDS-11*). Mersen recommends: l For stationary electrical machines: 180 - 250 g/cm2 (2.56 - 3.56 psi)
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