Measurements of conducted voltage in the low-frequency range from 2 kHz to 30 MHz for high-current industrial applications with regeneration drives

The increasing awareness of power saving and the ever rising dynamic requirements in industrial machine tool applications have led to an unpredicted popularity of power-drive systems with energy regeneration capability. This trend is supported by the fact that such drives become smaller, more efficient and lower in cost. The downside of regeneration drives is the higher noise potential in the low and high-frequency ranges due to the commonly used pulse-width modulation (PWM). The functional problems, especially in the lower frequency range, have recently resulted in an increasing demand from the market for noise suppression in this range.