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MOTOR SENSOR CONTROL USING FEEDBACK CIRCUIT

MOTOR SENSOR CONTROL USING FEEDBACK CIRCUIT. AJIT KUMAR SUBUDHI EE200118307 Under the guidance of Mr.Debasisha Jena. INTRODUCTION. Sensors are a critical component in a motor control system.

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MOTOR SENSOR CONTROL USING FEEDBACK CIRCUIT

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  1. MOTOR SENSOR CONTROL USING FEEDBACK CIRCUIT AJIT KUMAR SUBUDHI EE200118307 Under the guidance of Mr.Debasisha Jena

  2. INTRODUCTION Sensors are a critical component in a motor control system. They are used to sense the current, position, speed and direction of the rotating motor Many sensors are now available that integrate the sensor and signal-conditioning circuitry into a single package.

  3. TYPES OF SENSOR USED IN FEEDBACK CIRCUIT • Current sensors - Shunt resistor - Current-sensing transformer - Hall effect current sensor • Speed/position sensors - Quadrature encoder -         - Hall effect tachometer • Back EMF/Sensor less control

  4. The three most popular current sensors in motorcontrol applications are: • Shunt resistors • Hall effect sensors • Current transformers CURRENT SENSORS

  5. CURRENT SENSOR Shunt resistors are popular current sensors because they provide an accurate measurement at a low cost. Hall effect current sensors are widely used because they provide a non-intrusive measurement Current-sensing transformers are especially used in high-current or AC line-monitoring applications.

  6. In single supply comparators, a reference voltage must be created The circuits create VREF by using a resistor voltage divider. The offset voltage of VREF enables the circuit to function as a zero-crossing detector without requiring a dual voltage power supply. COMPARATOR REFERENCEVOLTAGE

  7. .QUADRATURE ENCODER A quadrature encoder can be used to provide the speed, direction and shaft position of a rotating motor. The typical quadrature encoder is packaged inside the motor assembly and provides three logic-level signals that can be directly connected to the micro controller. Motor speed is determined by the frequency of the Channel A and B signals.

  8. HALL EFFECT TACHOMETERS These sensors are based on using the Hall element to sense the change influx in the air gap between a magnet and a notch in a rotating shaft or a passing ferrous gear tooth The circuitry inside the sensor typically consists of a comparator or Schmitt trigger to provide a digital output signal that can be directly connected to the micro controller.

  9. CONCLUSION That may damage the motor. Feedback sensors serve a critical role in a motor control system. These sensors provide information on the current, position, speed and direction of a rotating motor. The sensors improve the reliability of the motor by detecting fault conditions

  10. THANK U

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