Operation of PWM-driven motors, such as servo motors and variable frequency drives (VFD), causes a number of problems in equipment, including damage to the motor’s bearings from leakage currents via electrical discharge machining (EDM) and to motor’s insulation. PWM motors also are a major source of EMI in equipment.
OnFILTER’s 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.
Patent-pending 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.
How much EMI noise is on your power lines indeed? How to assess the levels of noise and its properties when it is obviously a bad idea to connect your oscilloscope or a spectrum analyzer directly to your power lines?
Our EMI interface adapters provide a barrier for high mains voltages but a straight passage for high-frequency signals so that you can connect your sensitive instrument to power lines for analysis and quantification. We offer plug-in and hand-held adapters which can measure both differential (“normal”) and common-mode noise.
EMI adapters have true balanced input allowing for measurement of signals on ground independently of ground loops. They enable measurements not only of EMI, but of power line communication (PLC) which is a part of Smart Power.