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Power saving system for lathe

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Power saving system for lathe

  1. 1. POWER SAVING SYSTEM FOR LATHE ABSTRACT:  In this modern world, the power saving system is help to us many purposes. Here we are using an electronic A.C motor speed regulator. This regulator is used to maintain the set speed of the motor constant.  The speed variation due to over load, line voltage fluctuations, over voltage, surge problems etc. Can be controlled and the speed is maintained constant by using this “POWER SAVING SYSTEM IN LATHE”. This unit can be used upto 1 H.P. A.C. motor. SCOPE OF THE PROJECT:  In most of the applications of A.C. motor constant speed is most suitable for many applications. Speed varied due to overload, line voltage fluctuations in the input supply, over voltage, changes in the frequency. Surge problems etc., Hence to overcome the above electronics control unit are suggested. These problems may cause poor speed regulation of the motor and also lesser efficiency. To avoid these problems electronic this unit is used to maintain a constant speed of the motor. ECWAY TECHNOLOGIES IEEE PROJECTS & SOFTWARE DEVELOPMENTS OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111/2222/3333 | 8754872111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com
  2. 2.  Electronic Digital Speed control of A.C. Motor can be economically constructed ensuring the automatic speed regulation irrespective of load conditions however being essentially we can set the required constant speed with constant power. The motor speed can be from zero to maximum rated speed. This unit can be used upto 1HP A.C. Motor. For speed setting there is a regulating potentiometer with points for Indicating the setting we can select the required speed of the particular motor depends upon its purpo WORKING OPERATION  The power saving lathe is main advantages for saving power of the motor. Motor is on whenever the tool post near to the work piece. Tool post beyond the work piece condition the motor is automatically off by sensing the rotating handle. The control circuit is consisting of an error amplifier speed amplifier, a current amplifier, voltage controlled oscillator, a trigger circuit and a full wave bridge converter.  The A.C motor is powered by an A.C converter, depending upon the firing angle of the SCR. The current supplied by the SCR will be lagging with the applied voltage, so speed control can be achieve by the varying the firing angle of the SCR.  The speed and current amplifier provided with regulated constant D.C. voltage. When the speed is set to a value by means of potentiometer, the error amplifier gives a voltage. The output from the error amplifier is amplified by a speed amplifier; the output from the speed amplifier drives a current amplifier. The output of the current amplifier provides a D.C voltage to the oscillator circuit depending on the amplifier of the input voltage available at the VCO.
  3. 3. ADVANTAGES Speed control upto 1 H.P A.C motor Speed variation is smoothly. This circuit is a Closed loop control system In this circuit Isolation transformer is used so that the A.C motor is products SCR firing angle is varied automatically By slight modification of this circuit, the single phase induction motor speed also varied. DISADVANTAGES This circuit produce the sinusoidal A.C voltage only, not the pure A.C voltage The noise produced by the motor is high due to voltage variation The efficiency of the motor is decreased due to input voltage is varied by the SCR circuit. APPLICATIONS Industrial application Machinery Application Power Generation station Power Transmition Station
  4. 4. BLOCK DIAGRAM - PHASE A.C. IN AC/DC CONVERTE R CONTROLLED RECTIFIER M TRIGER CIRCUIT VCO ERROR AMPLIFIER AMPLIFIER CURRENT FEED BACK AMPLIFIER
  5. 5. WORKING DIAGRAM:

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