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SPEED CONTROL of DC & 1-Phase AC MOTOR USING SCR

(UNIVERSAL SEWING MOTOR)
     
    SPECIFICATION :
 
  • Box Size : 250 x 200 x 50 mm
  • Input Power Supply : 230Vac, 50Hz AC Mains
  • 1-Phase full wave half controlled bridge is used to control speed of universal sewing motor
  • 1-Phase full wave AC regulator by connecting two SCRs in antiparallel is used to control speed of universal sewing motor
  • Open loop Speed control of motor is done by varying firing angle of SCRs
  • Variable Resistor is provided for changing the firing angle of SCRs
  • UJT triggering circuit is used to trigger the SCRs
  • Universal sewing motor of rating 0.35HP or 0.25HP will be supplied with trainer
  • Extra Instruments required : CRO, Digital multimeter & non contact type tachometer
    		•
      OBJECTIVE :  
     
  • Speed control of AC/DC motor using SCRs
  • Speed control by variable AC voltage.
  • Speed control by variable DC voltage.
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