Methods to resolve EMI from induction motor

Discussion in 'General Electronics Chat' started by nacoolp, May 30, 2014.

  1. nacoolp

    Thread Starter New Member

    Jan 2, 2013
    Hello everyone,

    I am facing an issue with the operations of a circuit that is already been designed. The problem occuring is that my circuit works in an area comprising of inuction motor. If my circuit is running and suddenly the motor starts, its electromagnetic field affects the operation of the circuit for an instance and then works properly back again. Similar kind of situation occurs when the motor is switched off. I merged the circuit ground with the body ground but to no avail. Also, i tried to merge the grounds of the motor as well as of my circuit. But the situation still persists. I have shield and filters also available on my circuit but, I guess, they are also not helping me with the issue.

    Kindly suggest me some other preventive measures to avoid this interference.

    Thanks in advance.
  2. bertus


    Apr 5, 2008
  3. alfacliff

    Well-Known Member

    Dec 13, 2013
    induction motors do not radiate any emi, the problem might be high current draw on startup. have you monitored the voltage supply for your circuit when the motor starts up?
    shortbus likes this.
  4. MaxHeadRoom


    Jul 18, 2013
    This is an article on equi-potential bonding that may help.
    Particularly if the circuit in question is Not directly part of the AC motor control.
    Last edited: May 30, 2014