Servo / VFD / VSD 3A Combo

OnFILTER EMI dV/dt Filters for Servo Motors and VFD / VSD

Do you need to improve reliability of your Pulse Width Modulation (PWM) driven motors, comply with IEC60034-17/-25 amd reduce Electro-Magnetic Interfrerence (EMI) and Electrical Overstress (EOS)

Operation of PWM-driven motors, such as servo and Variable Frequency Drives (VFD) / Variable Speed Drives (VSD), causes a number of problems in equipment, including damage to the motor’s bearings from leakage currents from Electrical Discharge Machining (EDM) and to the motor’s insulation. PWM-generated noise also causes errors in operation of electronic equipment.  Electronic components processed on PWM-driven tools, such as IC handlers, wire bonders, SMT pick-and-place machines along with many others, can be subjected to EOS, affecting yield and reliability.

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

No Mechanical Attachments
The SF series of filters require no mechanical attachments to a motor or shaft. The filters’ small size enables easy installation and unlike the mechanical approach, SF-series filters provide complete EMI reduction, addressing PWM noise problems at its core.

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

Complete EMI Protection
For complete EMI protection, you need to include filtering of both motor drive signal and incoming AC power, and one of the SF-series filters (the patent-pending SF20032) combines both in one small unit. Two independent filters, AC and PWM drive, are combined to provide complete EMI protection; saving both precious space in equipment and reducing cost.
Both common mode and differential noise are reduced.

Features

• Reduction of high-frequencycurrents

• Compiance with IEC60034-17/-25
   
• Prevention of EDM (Electrical Discharge Machining)
   
• Reduction of overall EMI
   
• Easy plug-in installation
   
• No mechanical attachments
   
• Drive and AC filtering in some models
   
• Optimized for most PWM motors
   
• Effective management of rise and fall times of drive pulses
   
• Proprietary reduction of ground current