Servo Motor / VFD Filters

Operation of PWM-driven motors - servo motors and variable frequency drives (VFD) - causes a number of problems in equipment, including damage to the motor’s bearings due to leakage current which causes electrical discharge machining (EDM) and to motor’s insulation.  PWM motors also are a major source of EMI in equipment. 

 

OnFILTER’s patented SF-series filters substantially reduce high-frequency leakage currents in motors and in wiring, assisting in compliance with the requirements of IEC60034-17/-25. They also reduce interfering high-frequency noise within the tool resulting from operation of PWM-driven motors.  

SF series filters greatly reduce high-frequency currents on equipment ground, as well as overall EMI in the tool, lowering risk of EOS and reducing errors in automated equipment and testers.

No Mechanical Fitting, No Wear, No Maintenance

OnFILTER' SF series filters have no mechanical coupling to the motors - all connections are electrical.  Their cost of ownership is zero.​

 
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Applications
Basic Connection of Motor Filter
Basic Connection of Combo Motor/AC Filter
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Application Notes
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Technical Articles

Interference Technology Magazine' Annual EMC Test and Design Guide, 2016

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