The core of the filters, which is a controller based on a 32-bit DSP, operates at a scanning rate of 48kHz. With a reaction time of only 21µs, the filters feature selective drive control algorithm, which is faster than conventional algorithms based on a fast Fourier transform. While power factor correction corrects inductive loads, the filters also correct capacitive reactive power loads.
The PQSine series not only filters, but also balances the loads to all phases. Neutral conductor currents can also be corrected using the series’ 4-line versions. The filters are offered with either a 7 or 12.1″ TFT colour touchscreen, which provides a user-friendly interface for setting parameters and monitoring the operation of the system.
TDK’s filters are suitable for frequency converters, UPS systems, photovoltaic systems, wind turbines and also data centres and production equipment in the semiconductor industry. The filters can also be used in office buildings and shopping centres.