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Motor control


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Motor control

  1. 1. Al barra Harahap(20215036) Myo Myint shein(20215701) MOTOR CONTROL DEVICES AND CIRCUIT Group-5
  2. 2. Basic motor-control Circuit -PILOT DEVICE -Motor starter PILOT DEVICE a group of a components that include push- button switches , limit switches and other switches commonly found in motor control circuit.
  3. 3. Firgure 1. Push button switches Push button switches
  4. 4. Figure 2. (a) fork lever roller yoke switch, (b)Roller arm limit switch, (c) Top roller limit switch,(d) Wobble lever-actuated cat whisker limit switch, (e) Side roller limit switch Level switches
  5. 5. Control Circuit -the control compnents ,which are the switches and coils that control the load. Load Circuit - the load components such as motor that cause the system to perform some type of action. Figure 3. A Ladder diagram of a control circuit and a load circuit
  6. 6. Two-Wire Control circuit Figure 4. (a) A wiring diagram of a two-wire control circuit for a compressor motor (b) Ladder diagram
  7. 7. Three-Wire Control circuit Figure 5. (a) Typical three-wire control system (b) Ladder diagram of a three wire control circuit.
  8. 8. Three-Wire control circuit with Indicator Lamp Figure 6. A wiring diagram and a ladder diagram of a three-wire control circuit with a indicator lamp
  9. 9. Reverse Motor starters Figure 7. A Ladder diagram and a ladder diagram of a forward and reverse motor starter forward reverse starter connection & working function & jo
  10. 10. Drum Switch -a manual switch that allows you to manually reverse the direction in which a motor is turning. Figure 8. A drum switch
  11. 11. (a) (b) (c) Figure 9. (a) Contacts of a drum switch when it is switched to the reverse position. (b) Contacts of a drum switch when it is switched to the off position. (c) Contacts of a drum switch when it is switched to the forward position.
  12. 12. Figure 9. A single-phase AC motor connected to a drum switch and A three-phase AC motor connected to a drum switch
  13. 13. Figure 10. A DC motor connected to a drum switch
  14. 14. Other Types of Pilot Devices -Flow switch (a device that monitors the flow of air, steam or liquid. It sends a "trip signal" to a different device in the system, such as a pump.) -Level switch (On-off switch that senses high or low liquid levels. A displacer is used as the sensor and is located in an external cage that mounts to the outside of a vessel.) -Pressure switch (a form of switch that closes an electrical contact when a certain set pressure has been reached on its input.)
  15. 15. (a) (c)(b) Figure 10. (a) Flow switch, (b) level switch and (c) Pressure switch
  16. 16. Terima kasih Banyak