Sine wave filters for frequency controlled motors
Bearing currents, voltage peaks and insulation failures in AC motors are problems that can lead to high maintenance costs. This phenomenon affects millions of motors worldwide and with the help of a sine wave filter, you can extend the time between services and increase the life of the motor. The product can be applied to a wide range of applications, is easy to apply and requires no intervention in the motor design.
Customized Sine Wave Filters
We offer a standard range of sine wave filters complemented by customized sine filters. The customized solutions are designed to meet specific needs. We are a flexible supplier, always prioritizing the customer's needs.
Read more about the project with Granitor Systems and how we developed a customized Sine wave filter for demanding mining environments.
Complete solutions for power quality projects
Tramo ETV is with you from start to finish in your power quality project. From data collection and action proposals to design, commissioning and verification tests - we offer assistance at every stage of the project.
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Background information
AC motors face problems such as bearing currents and voltage peaks, causing high maintenance costs for millions of motors worldwide. The cause of the problem is inherent in the very principle of FRO operation where asynchronous motors are fed with a frequency modulated voltage wave with several kHz switching frequency. This voltage creates a high-frequency magnetic field around the motor shaft and gives rise to inductively or capacitively transmitted bearing currents.
A sine wave filter removes high-frequency components from the supply voltage, thereby reducing the amplitude of the common-mode voltage that gives rise to the high-frequency magnetic field around the motor shaft. A sine wave filter extends the motor’s service life and increases the interval between service visits. Sine wave filters remove high-frequency components from the supply voltage, thereby reducing the amplitude of the common-mode voltage that generates high-frequency magnetic fields around the motor shaft.
Applications
sine wave filter can be applied to a variety of applications and requieres no modifications to the motor’s design. We recommend following applications:
modulated voltage needs to be eliminated
temperatures