AC Motor Speed Controller using U2008B

  • Rajkumar Sharma
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AC-Motor-Speed-Controller-500x500

This is a low cost, current feedback phase control AC motor driver based on U2008 IC. The U2008B is designed as a phase control circuit in bipolar technology. It enables load-current detection as well as mains-compensated phase control. Motor control with load-current feedback and overload protection are preferred applications.

Specifications

  • Supply Input:  230V AC
  • Load: up to 500W (Triac Requires Heat sink for Higher Load)
  • Jumper J1 Selection: A-Load Current Compensation or B-Soft Start
  • PR1: Preset for Phase Control ( Ramp Current Adjustment)
  • P1 : Potentiometer Set Point

Schematic

AC-Motor-Speed-Controller-SCH

Parts List

AC-Motor-Speed-Controller-BOM

PCB

Comments

  • Ajay Desai

    I would like to know the cost of this kit and it’s availability details.

    2 years ago
    • admin

      How many pieces of this kit do you need? You can also check on http://www.koteq.com for kits of our projects.

      2 years ago
      • Ajay Desai

        I need about 25 pieces. It is not available on koteq. Let me know availability in Hyderabad

        2 years ago
        • admin

          Unfortunately the IC isn’t available and we cannot sell this kit.

          2 years ago
  • Marcel

    Soft start does not work properly even with resistive load. Counter-effect. It starts at full speed and then turns to the set value of P1. Direct launch does not work at all. Could the problem be in U2008?

    1 year ago
  • this schematic isnt for load current compensation… if you look at scheme in datasheet, you ll see that its for soft start

    1 year ago
  • Sam

    is there a way to control this by Arduino, so that It can give us different speeds at a programmed time ??

    1 month ago
    • I am not sure i understand what would you like to do. Could you please explain?

      2 weeks ago

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