Regenerative Braking in Single Phase Induction Motors...

Discussion in 'The Projects Forum' started by danny1078, Apr 4, 2017.

  1. danny1078

    Thread Starter New Member

    Apr 4, 2017
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    0
    Hi, I am currently working on a project that compares the regen braking of DC and AC motors. The DC circuit was fairly simple so I finished it pretty quickly. However, I am quite stuck on the AC circuit design. After doing some research, I learned that decreasing the frequency fed into the induction motor effectively turns it into a generator (since rotor speed is greater than synchronous speed), and I would like to capture the energy in a DC capacitor for measure. Right now, I'm thinking of using this open source project-https://github.com/Terbytes/Arduino-Atmel-sPWM as a variable frequency inverter drive with a H bridge to convert 12V DC to 220V AC for the motor. Any suggestion to how to effectively recapture the stored energy is much appreciated!:)
    P.S. the motor is a fairly small single phase induction motor that draws in about 10W so probably no power semiconductors are needed.

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    Last edited by a moderator: Apr 4, 2017
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    16,409
    4,832
    A common method used in Induction motors is DC injection for braking.
    Probably simpler than decreasing the frequency.
    Max.
     
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