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Drives and control


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Drives and control

  1. 1. Drives and control By Kaviyarasan.s
  2. 2. Spindle drives A spindle drive is a primitive type of transmission. A rod, referred to as a spindle, is attached to the output end of and engine. This rod then comes in direct contact with a tired.
  3. 3. SPINDLE IN CNC In CNC machine high speed ,large variation in cutting speed is required. The cutting speed varies from 10 meters from minute to 1000 meters per minute. The cutting speed is only provided with help of electrical motor
  4. 4. Application of shunt motor Speed control Starting Braking Lathe Pumps Disks In achieving required torque Fan
  5. 5. D c Shunt motor A shunt DC motor connects the armature and field windings in parallel or shunt with a common D.C. power source. This type of motor has good speed regulation even as the load varies, but does not have the starting torque of a series DC motor. It is typically used for industrial, adjustable speed applications, such as machine tools, winding.
  6. 6. 3ø induction motor An asynchronous motor type of an induction motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding.
  7. 7. Three-phase squirrel-cage asynchronous motors are widely used in industrial drives because they are rugged, reliable and economical. Single-phase induction motors are used extensively for smaller loads, such as household appliances like fans. Although traditionally used in fixed-speed service, induction motors are increasingly being used with variable-frequency drives (VFDs) in variable-speed service
  8. 8. Application of 3ø motor variable-torque centrifugal fan, pump and compressor load applications. Squirrel cage induction motors are very widely used in both fixed-speed and variable-frequency drive (VFD) applications. Variable voltage and variable frequency drives are also used in variable-speed service.